Perfect matched pair of vintage Philips SQ E88CC audio tubes - Made in Holland - 1962 - Very Rare Note: If you are looking for a single Philips SQ E88CC tube instead of a matched pair, please check out our listing of 1961s Philips SQ E88CC Tube. Tube Summary The beauty, the legend, the classic, the Special Quality(SQ) - this is the super tube from Heerlens high echelon that doesnt break your bank. Known for their superb musicality and ultra low noise, thanks to Philips proprietary SQ design, these tubes remain among audiophiles top choices for serious listening. Sound Characteristics Immediately appealing is the super smooth highs offered by these tubes with lots of open air. The overall tonality of SQ is warm, musical and euphonic. The midrange displays some secondary octave nuances, which is very unique and can hardly be found even among the top-end German tubes. Similar to the Telefunken tubes, the SQs can create infinite levels of harmonic depth and a liquid sonic texture without altering the musicality of the sound. The bass on these is the clear winner of the Heerlen tubes family: articulate, accurate, deep, textured, full-bodied and powerful. The sound stage is wide and structured - it feels the dimensions of the sound shape are clearly defined no matter how it moves. Vocal representation on the SQs is close to Mitcham and Blackburn Mullard tubes in terms of warmth, sweetness and texture, making them great alternatives to Mullards as the best vocals tube. But what truly shines on SQ tubes, especially the ones from the 1960s like this pair, is their magic in portraying piano music: creamy smooth, richly colored, realistic and intimate. For many audiophiles (incl. ourselves), theyre the go-to tube for piano sound. Listening to Claudio Arraus Beethoven Complete Piano Sonatas on these tubes should be on your bucket list if you happen to be into classical piano music, but even if you are not, these tubes superb interpretation of piano music from any genre will amaze you. The ultra low noise on SQs also sets them apart from most of the high-end tubes. They dont just compete with Telefunken tubes in low noise; theyre known for being a long-term leader in low noise. As a result, you get superb detail and clarity from these tubes as well. Professional Sound Evaluation The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC - Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli - Output: Focal Clear MG Pro open-back headphones Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above. Professional Tube Testing Both tubes tested NOS (100%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 12,600/12,000 Tube 2: 12,600/12,700 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound, so the higher the numbers the stronger. Appearance & cosmetic condition Besides the world-class sound characteristics, we still treasure this pair for its near pristine cosmetic condition given the tubes age - over 90% of the paint is still intact on both tubes, and the date codes of the Heerlen factory etched on glass are perfectly visible: delta 2G4 (delta = Heerlen, 2 = 1962, G = July, 4 = 4th week of the month)delta 2A3 (delta = Heerlen, 2 = 1962, A = January, 3 = 3rd week of the month) Shipping Policy - Ship worldwide! Flat-rate shipping (USPS First-Class) within the US. - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Combined shipping available. Please request invoice for total before making payment or receive shipping credit after order ships. - Customers outside the US please pay extra attention: International shipping is through USPS First Class Mail International by default. Its the least expensive option (even cheaper than eBay International Shipping) but may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high quality standard for the products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing AND before we ship them to customers. So the defective item case doesnt exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes do not work and we will open a dispute with eBay. Sound experience is a very subjective thing, and lets be real its not that easy to run into compatibility issues between amps and tubes (so that one wont fly, either.) Please contact us to work things out before submitting return requests claiming item is defective or item not as described. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound, sharing our sound experience with you, packing and shipping) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumias founder is a seasoned sound professional who has advised orchestras and music studios in sound production in USA for over two decades, and knowing sound is the minimum skill requirement of our team. No tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats guaranteed. We have already reported several abusers and eBay has ruled in our favor the dispute cases. We are more determined than ever to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable abuses that are detrimental to the eBay marketplace, the vintage tubes market and the audiophile community.

sought after rich hifidelity tone 6922 e88cc philips sq audio tube, legendary transparencymusical dutch lively resolution / real+fragile labels / proprietary cali refurb / audio grade!matched balanced 100% mutual gm (100+nos/65+good) ships worldwide well packed ~cali acoustics~~see our other listings for alternate listening positions, bid/buy/best offer!~ vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon) ~ 6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~ 12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~ 6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 ~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

2 balanced old stock special quality philips e188cc/7308 pro audio tubes, hifidelity tone!legendary dutch house resolve musicality and transparent imaging, linear tall stage great basspremium e88cc/6922 upgrade w/ more low/top end reach, more rugged design lower noiseaudio grade and full mutual gm % match 116/116~118/122 % (100+nos/65+good)authentic delta code philips! special comms grade nhk editions (rare!) ~see our other listings for alternate listening positions, bid/buy/best offer~~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hifi~caliacoustics instagram / caliacoustics dot com (soon!)~~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audiotesearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

4 balance matched old stock philips sq series e88cc gold pin audio tubes, legendary tonelinear transparency lively dutch house response famed warm bass imagingmatched 100% mutual gm quad, nos/new w/ no flashing! give 100+ hours to settle in ~cali acoustics~ ~see our other listings for alternate listening positions! bid/buy/best offer~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!) ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

NOS Philips Miniwatt E88CC / 6922 Special Quality (SQ) Gold Pins, large halo getter, Valve/Vacuum Tube - AVO Tested. Shipped with original box a bit perished, but included as part of the story. Tested on a recently calibrated AVO VCM 160. No leaks or shorts, solid bases, shiny pins. eBay seller for over 20 years, buy with confidence - see feedback. Valves will be shipped next day, carefully packaged, tracked and insured. Please drop a note with any questions. Shipping happily combined on multiple items. For overseas purchases, please message for a shipping quote before purchasing. Dont use your amp as a circuit breaker, buy tested valves!

1 x balance matched old stock philips sq series e88cc gold pin audio tube, legendary tonereal holland code and label! (be aware of relabelers) pristine collectible conditionlinear transparent sound stage dutch house resolve famed warm bass imagingaudio grade circuit ready and full mutual gm test 100+% leak short gas+ famed special quality superb for vocals/amps/mics/instruments and moreships well packed worldwide w/ old or new tube box see our other listings for alternate listening positions, best offer always enabled~~cali acoustics~ ~stereos amps vocals instruments tube mics lofi / hifi bright /warm tone e88cc 6dj8 ecc88 6922 plugin apps~~rodemics wood audio liquid platinum aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more!~

2 balance matched old stock philips sq series e88cc gold pin audio tubes, legendary tonereal holland codes and labels! (be aware of relabelers) pristine collectible conditionlinear transparent sound stage dutch house resolve famed warm bass imagingaudio grade circuit ready and full mutual gm test 100+% leak short gas+ superb for vocals/amps/mics, ships well packed worldwide w/ old or new tube boxes see our other listings for alternate listening positions, best offer enabled~~cali acoustics~ ~stereos amps vocals instruments tube mics lofi / hifi bright /warm tone e88cc 6dj8 ecc88 6922 plugin apps~~rodemics wood audio liquid platinum aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more!~

E88CC E188CC 6DJ8 ECC88 6922 SQ PHILIPS two stars MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,D geter,testedEXTRA RARE MATCHED PAIR !!!! EXTRA TUBES GREAT SOUND!!!!!!Many e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rare !!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the tubes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code: All tubes 7L4 / triangle8J and etched for glassTested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/15mA and Ia = 16/15.5 mA

E188CC E88CC 6DJ8 ECC88 6922 PHILIPS MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,o geter,tested,with boxThe Philips Holland SQ E188CC / 7308 Gold Pin is the holy grail of lush 6922 tone. These are right up there with Telefunken CCa and Siemens 7308 when it comes to rarity. To our ears these sound more musical than the Siemens or Telefunken. These have a large round getter and beautiful construction.EXTRA TUBES GREAT SOUND!!!!!!EXTRA MATCHED!!!EXTRA BALANCED!!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the pipes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code VR7??? / delta8K? and VR7???/delta8I4Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/16mA and Ia = 16/6mA

E88CC 6922 Philips Miniwatt SQ.Gold Pin.Used.Lot 3 pcs. E88CC (ECC88) double triode is commonly used in the front end of high quality low frequency amplifiers. Tesla production.ECC88 completed in a glass finger case with 9 pins and works in any position. Indirectly heated oxide cathode. E88CC Used, without factory packaging. Lot 3 pcs. Departure from Ukraine.

4 balance matched old stock philips sq series e88cc gold pin audio tubes, legendary tonereal holland codes and labels! (be aware of relabelers) pristine collectible conditionlinear transparent sound stage lively dutch house response famed warm bass imagingaudio grade circuit ready and full mutual gm test quad 100+% leak short gas+ superb second harmonic resolve for vocals/amps/mics, top ranked vtv 97 issue ~see our other listings for alternate listening positions! bid/buy/best offer~vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!)~cali acoustics~ ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cv2492 cca ~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81 ~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34 (new!) ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

Perfect matched pair of vintage Philips SQ E88CC audio tubes - Made in Holland - 1964 - Very Rare Tube Summary The beauty, the legend, the classic, the Special Quality(SQ) - this is the super tube from Heerlens high echelon that doesnt break your bank. Known for their superb musicality and ultra low noise, thanks to Philips proprietary SQ design, these tubes remain among audiophiles top choices for serious listening. Sound Characteristics Immediately appealing is the super smooth highs offered by these tubes with lots of open air. The overall tonality of SQ is warm, musical and euphonic. The midrange displays some secondary octave nuances, which is very unique and can hardly be found even among the top-end German tubes. Similar to the Telefunken tubes, the SQs can create infinite levels of harmonic depth and a liquid sonic texture without altering the musicality of the sound. The bass on these is the clear winner of the Heerlen tubes family: articulate, accurate, deep, textured, full-bodied and powerful. The sound stage is wide and structured - it feels the dimensions of the sound shape are clearly defined no matter how it moves. Vocal representation on the SQs is close to Mitcham and Blackburn Mullard tubes in terms of warmth, sweetness and texture, making them great alternatives to Mullards as the best vocals tube. But what truly shines on SQ tubes, especially the ones from the 1960s like this pair, is their magic in portraying piano music: creamy smooth, richly colored, realistic and intimate. For many audiophiles (incl. ourselves), theyre the go-to tube for piano sound. Listening to Claudio Arraus Beethoven Complete Piano Sonatas on these tubes should be on your bucket list if you happen to be into classical piano music, but even if you are not, these tubes superb interpretation of piano music from any genre will amaze you. The ultra low noise on SQs also sets them apart from most of the high-end tubes. They dont just compete with Telefunken tubes in low noise; theyre known for being a long-term leader in low noise. As a result, you get superb detail and clarity from these tubes as well. Professional Sound Evaluation The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC - Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli - Output: Clear Focal MG Pro open-back headphones Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above. Professional Tube Testing Both tubes tested Strong NOS (110%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 14,000/14,000 Tube 2: 13,700/13,800 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound, so the higher the numbers the stronger. Appearance & cosmetic condition Besides the world-class sound characteristics, we still treasure this pair for its near pristine cosmetic condition given the tubes age - over 95% of the paint is still intact on both tubes, and the identical date code of the Heerlen factory etched on glass is perfectly visible: delta 4K2 (delta = Heerlen, 4 = 1964, K = November, 2 = 2nd week of the month) Shipping Policy - Ship worldwide! Flat-rate shipping (USPS First-Class) within the US. - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Combined shipping available. Please request invoice for total before making payment or receive shipping credit after order ships. - Customers outside the US please pay extra attention: International shipping is through eBay International Shipping program by default. Its the least expensive option and customs declaration is automated but it may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high quality standard for the products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing AND before we ship them to customers. So the defective item case doesnt exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes do not work and we will open a dispute with eBay. Sound experience is a very subjective thing, and lets be real its not that easy to run into compatibility issues between amps and tubes (so that one wont fly, either.) Please contact us to work things out before submitting return requests claiming item is defective or item not as described. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound, sharing our sound experience with you, packing and shipping) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumias founder is a seasoned sound professional who has advised orchestras and music studios in sound production in USA for over two decades, so knowing sound is the minimum skill requirement of our team. We are experts in sound and equipment - tubes, headphones, speakers, DACs, amps, turntables, CD Players - you name it. So no tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats also guaranteed. We have already reported several abusers to eBay and we are determined to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable behaviors that are detrimental to eBay, the vintage tubes market and the audiophile community.

E188CC E88CC 6DJ8 ECC88 6922 PHILIPS MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,o geter,tested,with boxThe Philips Holland SQ E188CC / 7308 Gold Pin is the holy grail of lush 6922 tone. These are right up there with Telefunken CCa and Siemens 7308 when it comes to rarity. To our ears these sound more musical than the Siemens or Telefunken. These have a large round getter and beautiful construction.EXTRA TUBES GREAT SOUND!!!!!!EXTRA MATCHED!!!EXTRA BALANCED!!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the pipes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code VR7??? / delta8K? and VR7???/delta8I4Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/16mA and Ia = 16/6mA

E88CC E188CC 6DJ8 ECC88 6922 SQ PHILIPS two stars MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,D geter,testedEXTRA RARE MATCHED PAIR !!!! EXTRA TUBES GREAT SOUND!!!!!!Many e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rare !!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the tubes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code: All tubes 7L4 / triangle8J and etched for glassTested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/15mA and Ia = 16/15.5 mA

4 balance matched old stock philips sq series e88cc gold pin audio tubes, legendary tonereal holland codes and labels! (be aware of relabelers) pristine collectible conditionlinear transparent sound stage lively dutch house response famed warm bass imagingaudio grade circuit ready and full mutual gm test quad 100+% leak short gas+ superb second harmonic resolve for vocals/amps/mics, top ranked vtv 97 issueships well packed worldwide w/ old or new tube boxes see our other listings for alternate listening positions, best offer enabled~~cali acoustics~ ~stereos amps vocals instruments tube mics lofi / hifi bright /warm tone e88cc 6dj8 ecc88 6922 plugin apps~~rodemics wood audio liquid platinum aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more!~

E188CC E88CC 6DJ8 ECC88 6922 PHILIPS MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,o geter,tested,with boxThe Philips Holland SQ E188CC / 7308 Gold Pin is the holy grail of lush 6922 tone. These are right up there with Telefunken CCa and Siemens 7308 when it comes to rarity. To our ears these sound more musical than the Siemens or Telefunken. These have a large round getter and beautiful construction.EXTRA TUBES GREAT SOUND!!!!!!EXTRA MATCHED!!!EXTRA BALANCED!!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the pipes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code VR7??? / delta8K? and VR7???/delta8I4Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/16mA and Ia = 16/6mA

E88CC E188CC 6DJ8 ECC88 6922 SQ PHILIPS two stars MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,D geter,testedEXTRA RARE MATCHED PAIR !!!! EXTRA TUBES GREAT SOUND!!!!!!Many e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rare !!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the tubes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code: All tubes 7L4 / triangle8J and etched for glassTested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/15mA and Ia = 16/15.5 mA

2 balanced old stock special quality philips e188cc/7308 pro audio tubes, hifidelity warmthlegendary dutch house resolve musicality and transparent imaging! linear stage great basspremium e88cc/6922 upgrade w/ more low/top end reach, more rugged design lower noiseaudio grade and full gm test 116/116~118/122 % mutual gm (65+ good / 100%+ nos)authentic delta code philips! ships worldwide well packed w/ plain or branded tube boxes ~see our other listings for alternate listening position experiences! best offer enabled~~cali acoustics~ ~stereos preamps tube mics vocals instruments hifi/lofi and more bright warm vintage tone 6dj8/6922 apps~~woo audio liquid platinum aesthetix cat audioresearch arc ear herron decco lector manley horizons rodemics bluemics echo conrad frontiers pathos vac and more~

Perfect matched pair of vintage Philips Miniwatt SQ E88CC audio tubes - Made in Holland - 1965 - Extra Rare Tube Summary The beauty, the legend, the classic, the Special Quality(SQ) - this is the super tube from Heerlens high echelon that doesnt break your bank. Known for their superb musicality and ultra low noise, thanks to Philips proprietary SQ design, these tubes remain among audiophiles top choices for serious listening. And among all the brands (most owned by Philips) that had made SQ tubes, Miniwatt is the most sought after and also the rarest! Sound Characteristics Immediately appealing is the super smooth highs offered by these tubes with lots of open air. The overall tonality of SQ is warm, musical and euphonic. The midrange displays some secondary octave nuances, which is very unique and can even hardly be found on top-end German tubes. Similar to Telefunken tubes, SQs can create infinite levels of harmonic depth and a liquid sonic texture without altering the musicality of the sound. The bass on these is the clear winner of the Heerlen tubes family: articulate, accurate, deep, textured, full-bodied and powerful. The sound stage is wide and structured - it feels the dimensions of the sound shape are clearly defined no matter how it moves. Vocal representation the SQs is close to Mitcham and Blackburn Mullard tubes in terms of warmth, sweetness and texture, making them great alternatives to Mullards as the best vocals tube. As a matter of fact, some of the best Mullard tubes do carry the SQ logo as they were sourced from the Heerlen factory. And what truly shines on SQ tubes, especially the ones from the 1960s like this pair, is their magic in portraying piano music: creamy smooth, richly colored, realistic and intimate. For many audiophiles (incl. myself), theyre the go-to tube for piano sound. Listening to Claudio Arraus Beethoven Complete Piano Sonatas on these tubes should be on your bucket list if you happen to be into classical piano music, but even if you are not, these tubes superb interpretation of piano music from any genre will amaze you. The ultra low noise on SQs also sets them apart from most of the high-end tubes. They dont compete with Telefunken tubes in low noise; theyre known for being a long-term leader in low noise. As a result, you get superb detail and clarity from these tubes as well. If you are curious to know how the Philips SQ E88CC compares to Telefunken E88CC, please check our listing of an immaculate matched pair of 1966s Telefunken E88CC tubes here: https://www.ebay.com/itm/266252586987 Appearance & cosmetic condition We treasure this pair for its pristine condition given the tubes age - nearly 95% of the paint is still intact on both tubes, and the date codes of the Heerlen factory etched on glass are perfectly visible: delta 5I2 (delta = Heerlen, 5 = 1965, I = September, 2 = 2nd week of the month)delta 5A1 (delta = Heerlen, 5 = 1965, A = Janurary, 1 = 1st week of the month) Professional Sound Evaluation The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC - Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli - Output: Clear Focal MG Pro open-back headphones Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above. Professional Tube Testing Both tubes tested Super Strong NOS (120%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 15,000/14,800 Tube 2: 15,200/15,400 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound, so the higher the numbers the stronger. Shipping - Customers outside the US please pay extra attention - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Ship worldwide! Flat-rate shipping within the US. Combined shipping available - request invoice for total before making payment or receive shipping credit after order ships. - International shipping is through eBay International Shipping program by default. Its the least expensive option and customs declaration is automated but it may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high standard on the quality of products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing. However, sound experience is a very subjective thing and its not uncommon to run into combability issues due to different amp designs, please contact us to work things out before submitting returns or opening a item not as described case on eBay. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound and sharing our sound experience with the world through this listing) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumia was founded by a professional audiophile who has advised orchestras and music studios in sound production in USA for over two decades so knowing sound is the minimum skill requirement of our team. We are experts in sound and equipment - tubes, headphones, speakers, DACs, amps, turntables, CD Players - you name it. So no tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats also guaranteed.

NOS Philips Miniwatt E88CC / 6922 Special Quality (SQ) Gold Pins, large halo getter, Valve/Vacuum Tube - AVO Tested. Shipped with original box a bit perished, but included as part of the story. Tested on a recently calibrated AVO VCM 160. No leaks or shorts, solid bases, shiny pins. eBay seller for over 20 years, buy with confidence - see feedback. Valves will be shipped next day, carefully packaged, tracked and insured. Please drop a note with any questions. Shipping happily combined on multiple items. For overseas purchases, please message for a shipping quote before purchasing. Dont use your amp as a circuit breaker, buy tested valves!

E88CC E188CC 6DJ8 ECC88 6922 SQ PHILIPS two stars MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,D geter,testedEXTRA RARE MATCHED PAIR !!!! EXTRA TUBES GREAT SOUND!!!!!!Many e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rare !!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the tubes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code: All tubes 7L4 / triangle8J and etched for glassTested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/15mA and Ia = 16/15.5 mA

E188CC E88CC 6DJ8 ECC88 6922 PHILIPS MATCHED PAIR NOS 2pcsGold pins,10000 h,grey anode plates,o geter,tested,with boxThe Philips Holland SQ E188CC / 7308 Gold Pin is the holy grail of lush 6922 tone. These are right up there with Telefunken CCa and Siemens 7308 when it comes to rarity. To our ears these sound more musical than the Siemens or Telefunken. These have a large round getter and beautiful construction.EXTRA TUBES GREAT SOUND!!!!!!EXTRA MATCHED!!!EXTRA BALANCED!!!All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the pipes are allowed to work 72 hours in order to get as much to their proper characteristic.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .Date code VR7??? / delta8K? and VR7???/delta8I4Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% Ia = 16/16mA and Ia = 16/6mA

Single Philips Miniwatt E88CC/6922 SQ, Gold Pins.Lightly used, mint condition, in Philips box.Please take a look at my other auctions as Im selling part of my collection.Happy Bidding!

Second pair of Philips PCC88/7dj8, white label. NOS, matched pair, never used with boxes.Please take a look at my other auctions as Im selling part of my collection.