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Proton AA-1150 Dual-Mono Power Amplifier | See description

End: 12.06. 2024 16:22:06 on Wednesday
  • Condition: For parts or not working
  • Price: 421.38 EUR FESTPREIS
  • Status: sold
  • Item number: 176398940889
  • Seller: taylormos11 (392|100.0%)
  • Seller information: non commercial
  • Item location: Moscow, Idaho USA
  • Ships to: US
  • Shipping: 40,0 EUR
  • on EBAY
  • Description

    Proton AA-1150 Dual-Mono Power Amplifier Actually it powers on, meters and one channel work great, the other channel does work, but has static or noise. In very good condition, minor scuffs or marks. See photos for details. Listed for parts or repair, no returns or refunds. Lower 48 shipping only.

Proton AA-1150 Amplifier Review, 2 pg, 1988, Full Test

End: 20.05. 2024 13:22:41 on Monday
  • Condition: Used
  • Price: 9.29 EUR FESTPREIS
  • Status: unsold
  • Item number: 145785631680
  • Seller: effgjm (22320|98.8%)
  • Seller information: Commercial (with base shop)
  • Item location: Olmsted Falls, Ohio USA
  • Ships to: US
  • Shipping: 3,0 EUR
  • on EBAY
  • Description

    This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

Proton Audio AA-1150 Power Amplifier

End: 03.05. 2024 05:22:23 on Friday
  • Condition: Used
  • Price: 604.67 EUR FESTPREIS
  • Status: sold
  • Item number: 135010585873
  • Seller: wafflesupreme (120|100.0%)
  • Seller information: non commercial
  • Item location: New York, New York USA
  • Ships to: US
  • Shipping: 50,0 EUR
  • on EBAY
  • Description

    Proton AA-1150 power amp Black Large illuminated meters Great overall condition 50 watts per channel into 8 ohms Never been opened Amazing amp outstanding clarity, depth, balance

Rare Proton AA-1150 Dual-Mono Amplifier 800w Peak Dynamic Power 2ohms.

End: 29.04. 2024 22:58:45 on Monday
  • Condition: Used
  • Price: 524.38 EUR FESTPREIS
  • Status: sold
  • Item number: 285817314967
  • Seller: sunriderleader (1417|100.0%)
  • Seller information: non commercial
  • Item location: Fresno, California USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    *UPDATE* I realized from viewing my own advert that my pictures weren’t really representative of how bad the case of this amplifier looked. I didn’t want the buyer of this amp to be disappointed by this and so I removed it and gave it a refresh of flat black primer and paint. The last 4 pictures are new and will give you a better idea of what it looks like. I’ve personally owned this amplifier for 30 years. It has been used off and on again in rotation and has always worked flawlessly. The chassis is not perfect but the front glass is clean. I’ve never had to have this repaired. Its sound is astonishing when compared to other amps and receivers from the same era. They have all come and gone and this has stayed with me. I’ve owned so so so many amps, and this wiped the floor with a good many of them. Here’s some extra generic info I pulled from someone else’s advert. A rare, high-quality vintage amplifier! Don’t be fooled by the 50wpc rating. Proton’s Dynamic Power on Demand gives it a claimed 7dB of headroom which, as Julian Hirsch said in his June 1988 review, makes it, “quite possibly the world’s most powerful “50W amplifier””. It’s a dual mono design and offers exemplary performance and musicality. Notably, Julian Hirsch found that it exceeded almost all of its published specs (shown below). Manufacturer’s published specifications: Rated power output: (20hz-20khz into 8ohms) 50w per channel Dynamic power: (at 8ohm/4ohm/2ohm) 280w/450w/600w IHF standard 20ms duration 100ms duration 220w/300w/350w Dynamic Headroom: (at 8ohm/4ohm/2ohm) 7db THD at rated power 0.02% Dimensions: 16.5” W x 14.5” D x 4.25” H Weight 25 lbs

Proton AA-1150 Dual-Mono Amplifier

End: 27.04. 2024 16:06:09 on Saturday
  • Condition: Used
  • Price: 266.85 EUR Auktion
  • Status: sold
  • Item number: 256486242105
  • Bids: 13
  • Seller: pcbytc (683|100.0%)
  • Seller information: non commercial
  • Item location: Fountain Inn, South Carolina USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Used amp, in working condition but certainly needs a tune-up and a good cleaning.I dont use it anymore, owned it for about 30 years now, currently dont need it. Its priced for someone to recondition and love or resell. IT IS NOT MINT but it 100% works.Right channel drops out at low volume, but I think thats dirty RCAs. Unit is currently boxed and ready to ship out.

Rare Proton AA-1150 Dual-Mono Amplifier 800w Peak Dynamic Power 2ohms.#1 Of 2

End: 26.04. 2024 02:48:02 on Friday
  • Condition: Used
  • Price: 487.74 EUR FESTPREIS
  • Status: unsold
  • Item number: 126427618035
  • Seller: shastaaudio (2447|100.0%)
  • Seller information: non commercial
  • Item location: Scranton, Pennsylvania USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Beautiful condition proton aa1150 power amplifier.50 watts per channel in to 8 ohm,100 into 4 ohm.2 ohm stable with 800 watts peak power.the amp works as it should and looks good doing it.extra large vu meters.amp has very little marks or scratches.come with a printed manual.will be double boxed.

Rare Proton AA-1150 Dual-Mono Amplifier 800w Peak Dynamic Power 2ohms.#2 Of 2

End: 26.04. 2024 02:47:43 on Friday
  • Condition: Used
  • Price: 463.58 EUR FESTPREIS
  • Status: unsold
  • Item number: 126427619345
  • Seller: shastaaudio (2447|100.0%)
  • Seller information: non commercial
  • Item location: Scranton, Pennsylvania USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Beautiful condition proton aa1150 power amplifier.50 watts per channel in to 8 ohm,100 into 4 ohm.2 ohm stable with 800 watts peak power.the amp works as it should and looks good doing it.extra large vu meters.amp has very little marks or scratches.come with a printed manual.will be double boxed.

Proton AA-1150 Dual Mono Amplifier Large Meters Audiophile | Beautiful AA1150

End: 24.04. 2024 02:00:19 on Wednesday
  • Condition: Used
  • Price: 538.63 EUR FESTPREIS
  • Status: unsold
  • Item number: 135009316264
  • Seller: erictheredps (1664|100.0%)
  • Seller information: non commercial
  • Item location: Palm Springs, California USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    nice powerfull amp..make offer--untested clean

Proton AA-1150 Amplifier Review, 2 pg, 1988, Full Test

End: 20.04. 2024 13:49:38 on Saturday
  • Condition: Used
  • Price: 9.2 EUR FESTPREIS
  • Status: unsold
  • Item number: 166715707304
  • Seller: effgjm (22242|98.7%)
  • Seller information: Commercial (with base shop)
  • Item location: Olmsted Falls, Ohio USA
  • Ships to: US
  • Shipping: 3,0 EUR
  • on EBAY
  • Description

    This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

Proton AA-1150 Amplifier Review, 2 pg, 1988, Full Test

End: 15.04. 2024 15:02:04 on Monday
  • Condition: Used
  • Price: 9.36 EUR FESTPREIS
  • Status: unsold
  • Item number: 166606501004
  • Seller: effgjm (22193|98.9%)
  • Seller information: Commercial (with base shop)
  • Item location: Olmsted Falls, Ohio USA
  • Ships to: US
  • Shipping: 3,0 EUR
  • on EBAY
  • Description

    This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

Vintage Proton AA-1150 Dual-Mono Power Amplifier - Green Meters -Power On Demand

End: 21.03. 2024 18:06:49 on Thursday
  • Condition: Used
  • Price: 598.66 EUR FESTPREIS
  • Status: unsold
  • Item number: 116064530640
  • Seller: bsturm50 (1272|97.6%)
  • Seller information: non commercial
  • Item location: Saint Charles, Missouri USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    Selling my very nice Proton AA-1150 dual mono power amplifier Great sound quality and build quality Green meters and glass front are stunning(see pics) Underrated at 50 watts per channel with heavy duty power supply labeled power on demand series Bursts up to 150 watts per channel for musical peaks. Tons of headroom and clarity. Ultra high dampening factor Nicest on ebay Heavy duty binding posts on rear panel accept bare speaker wire or banana plugs. Very versatile Will be prof packed and shipped. Please email with any questions. Thanks.

Rare Proton AA-1150 Dual-Mono Amplifier - excellent Condition

End: 19.03. 2024 16:30:25 on Tuesday
  • Condition: Used
  • Price: 692.62 EUR FESTPREIS
  • Status: unsold
  • Item number: 226021999711
  • Seller: ducmonster1985 (262|85.7%)
  • Seller information: non commercial
  • Item location: Bloomington, Illinois USA
  • Ships to: US
  • Shipping: 85,0 EUR
  • on EBAY
  • Description

    Up for sale is a rare Proton AA-1150 Dual-Mono Amplifier, designed for audiophiles seeking exceptional sound quality. This high-end amplifier is perfect for music lovers who demand the best out of their audio systems. I have two available!! Equal condition. Upgraded led meter lights. All new speaker relays. Great condition. Huge dynamic power. This will be properly boxed correctly for shipping. Specs in photos As with all vintage equipment these are sold as is. They are in perfect working order but they are vintage.

Rare Proton AA-1150 Dual-Mono Amplifier - excellent Condition

End: 14.03. 2024 02:22:32 on Thursday
  • Condition: Used
  • Price: 1106.48 EUR FESTPREIS
  • Status: unsold
  • Item number: 156035815414
  • Seller: bashvintageaudio (242|99.3%)
  • Seller information: non commercial
  • Item location: Auburndale, Massachusetts USA
  • Ships to: US
  • Shipping: 75,0 EUR
  • on EBAY
  • Description

    I have a rare and gorgeous Proton AA-1150 available for sale. The unit is in near mint condition. Proton AA-1150 is a Dual mono power amplifier. Dual Mono Power equals Stereo. Constructed like the sought after Monoblocks of Marantz, Dynaco and others but put together in one compact and Powerful package. Rated at 50 watts (see video) per channel into 8 ohm but which makes 400 watts/channel on musical peaks with DPD or dynamic power on demand. Large green power meters are calibrated from 0-400 watts. YouTube: https://youtu.be/0pXYKnhJtGk?si=KDcIomykToyjnDWs *** CASH & CARRY in newton ma or Portsmouth RI *** #### Please Read #### Due to the age of this device, this equipment is being sold AS IS with no returns or adjustments. This is NOT a new component. As such, it does not come with any guarantee-- implied or written. Vintage audio equipment is sensitive and does not travel particularly well. So in rare instances, that which was working 100% at my place may require adjustment or servicing before working equally well at yours. Most on-line sales of vintage electronics happen under these conditions - but I just wanted to point this out so there are no misunderstandings or disappointments. Please examine the pictures and video carefully. They are part of the description. Will be packed securely to ensure safe shipping. #### Sansui Marantz Luxman Sony Sanyo Kenwood nad pioneer Yamaha Nikko technics

Proton AA-1150 Dual-Mono Amplifier - excellent Physical Condition

End: 29.02. 2024 21:40:09 on Thursday
  • Condition: For parts or not working
  • Price: 277.78 EUR FESTPREIS
  • Status: sold
  • Item number: 226024836497
  • Seller: ducmonster1985 (262|85.7%)
  • Seller information: non commercial
  • Item location: Bloomington, Illinois USA
  • Ships to: US
  • Shipping: 40,0 EUR
  • on EBAY
  • Description

    UPGRADED LED meters. Has static with sound. Sound comes and goes. Case and glass are in great condition. For parts not working properly Will be packed correctly and securely

Rare Proton AA-1150 Dual-Mono Amplifier 800w Peak Dynamic Power 2ohms.

End: 27.02. 2024 11:08:55 on Tuesday
  • Condition: Used
  • Price: 623.62 EUR FESTPREIS
  • Status: sold
  • Item number: 355467244046
  • Seller: angefern-34 (34|97.2%)
  • Seller information: non commercial
  • Item location: Delano, California USA
  • Ships to: US
  • Shipping: 39,0 EUR
  • on EBAY
  • Description

    Proton AA-1150 Amplifier. Used sparingly. Can drive almost anything with peak power of 400wpc @8ohms. Check it lab measurements on last page. A rare, high-quality vintage amplifier! Don’t be fooled by the 50wpc rating. Proton’s Dynamic Power on Demand gives it a claimed 7dB of headroom which, as Julian Hirsch said in his June 1988 review, makes it, “quite possibly the world’s most powerful “50W amplifier””. It’s a dual mono design and offers exemplary performance and musicality. Notably, Julian Hirsch found that it exceeded almost all of its published specs (shown below).Manufacturer’s published specifications:Rated power output: (20hz-20khz into 8ohms) 50w per channelDynamic power: (at 8ohm/4ohm/2ohm) 280w/450w/600wIHF standard 20ms duration100ms duration 220w/300w/350wDynamic Headroom: (at 8ohm/4ohm/2ohm) 7dbTHD at rated power 0.02%Dimensions: 16.5” W x 14.5” D x 4.25” HWeight 25 lbs

Proton AA-1150 Amplifier Review, 2 pg, 1988, Full Test

End: 19.02. 2024 18:00:55 on Monday
  • Condition: Used
  • Price: 9.22 EUR FESTPREIS
  • Status: unsold
  • Item number: 166579487800
  • Seller: effgjm (22088|98.9%)
  • Seller information: Commercial (with base shop)
  • Item location: Olmsted Falls, Ohio USA
  • Ships to: US
  • Shipping: 3,0 EUR
  • on EBAY
  • Description

    This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

Proton AA-1150 Dual-Mono Amplifier, Extremely Nice!!

End: 19.02. 2024 17:24:04 on Monday
  • Condition: Used
  • Price: 729.05 EUR Auktion
  • Status: unsold
  • Item number: 116066854951
  • Bids: 0
  • Seller: jimkrell (612|100.0%)
  • Seller information: non commercial
  • Item location: Portland, Oregon USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This is a rare, vintage amplifier from Proton, with an advanced Dual-Mono design. It is in extremely nice condition, and has had the green illumination replaced after the bulbs finally went out. These have been replaced with a wonderful blue for a slightly updated look. The amplifier has an amazing 7db of dynamic headroom, which allows it to put out considerably more power for musical peaks, and the oversized power supply is able to cope with lower-impedance loads and double the rated power before dipping into that amazing headroom. Truly a fantastic amp, with construction not often seen these days! From a smoke-free home.

Proton AA-1150 Amplifier Review, 2 pg, 1988, Full Test

End: 02.02. 2024 16:20:43 on Friday
  • Condition: Used
  • Price: 9.29 EUR FESTPREIS
  • Status: unsold
  • Item number: 166487281874
  • Seller: effgjm (22024|98.9%)
  • Seller information: Commercial (with base shop)
  • Item location: Olmsted Falls, Ohio USA
  • Ships to: US
  • Shipping: 3,0 EUR
  • on EBAY
  • Description

    This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

Proton AA-1150 Dual-Mono Amplifier, Extremely Nice!!

End: 02.02. 2024 01:16:33 on Friday
  • Condition: Used
  • Price: 88.2 EUR FESTPREIS
  • Status: sold
  • Item number: 156013807960
  • Seller: mircear (78|97.6%)
  • Seller information: non commercial
  • Item location: Stuart, Florida USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    Used, working condition. Shows cosmetic signs of usage, scratches, but works fine. See pictures with description of features.

Proton AA-1150 Dual-Mono Amplifier, Extremely Nice!!

End: 28.01. 2024 22:00:45 on Sunday
  • Condition: Used
  • Price: 724.4 EUR Auktion
  • Status: sold
  • Item number: 116043467987
  • Bids: 1
  • Seller: jimkrell (610|100.0%)
  • Seller information: non commercial
  • Item location: Portland, Oregon USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This is a rare, vintage amplifier from Proton, with an advanced Dual-Mono design. It is in extremely nice condition, and has had the green illumination replaced after the bulbs finally went out. These have been replaced with a wonderful blue for a slightly updated look. The amplifier has an amazing 7db of dynamic headroom, which allows it to put out considerably more power for musical peaks, and the oversized power supply is able to cope with lower-impedance loads and double the rated power before dipping into that amazing headroom. Truly a fantastic amp, with construction not often seen these days! From a smoke-free home.

Proton AA-1150 Dual-Mono Amplifier, Extremely Nice!!

End: 18.01. 2024 22:00:09 on Thursday
  • Condition: Used
  • Price: 722.67 EUR Auktion
  • Status: unsold
  • Item number: 116034110230
  • Bids: 0
  • Seller: jimkrell (608|100.0%)
  • Seller information: non commercial
  • Item location: Portland, Oregon USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This is a rare, vintage amplifier from Proton, with an advanced Dual-Mono design. It is in extremely nice condition, and has had the green illumination replaced after the bulbs finally went out. These have been replaced with a wonderful blue for a slightly updated look. The amplifier has an amazing 7db of dynamic headroom, which allows it to put out considerably more power for musical peaks, and the oversized power supply is able to cope with lower-impedance loads and double the rated power before dipping into that amazing headroom. Truly a fantastic amp, with construction not often seen these days! From a smoke-free home.

PROTON AA-1150 POWER AMPLIFIER NICE!

End: 16.01. 2024 16:57:31 on Tuesday
  • Condition: Used
  • Price: 371.67 EUR FESTPREIS
  • Status: sold
  • Item number: 204618013827
  • Seller: sav4580 (2445|99.8%)
  • Seller information: Commercial (with base shop)
  • Item location: Naples, Florida USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This Proton AA-1150 power amplifier is perfect for serious audiophiles and home theater enthusiasts. With its sleek design and top-of-the-line features, this amplifier delivers clear, powerful sound that will blow you away. The Proton AA-1150 is a top-of-the-line amplifier that is ideal for use in homes, offices, and other settings where high-quality audio is essential. Whether you're looking to upgrade your current system or simply looking for an affordable, high-quality amplifier, the Proton AA-1150 is the perfect choice. With its reliable performance, exceptional sound quality, and top-notch features, this amplifier is sure to impress even the most discerning audiophile. So why wait? Order your Proton AA-1150 power amplifier today and experience the ultimate in audio quality!

Proton AA-1150 Dual-Mono Amplifier, Extremely Nice!!

End: 08.01. 2024 21:59:48 on Monday
  • Condition: Used
  • Price: 724.67 EUR Auktion
  • Status: unsold
  • Item number: 116024319875
  • Bids: 0
  • Seller: jimkrell (608|100.0%)
  • Seller information: non commercial
  • Item location: Portland, Oregon USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This is a rare, vintage amplifier from Proton, with an advanced Dual-Mono design. It is in extremely nice condition, and has had the green illumination replaced after the bulbs finally went out. These have been replaced with a wonderful blue for a slightly updated look. The amplifier has an amazing 7db of dynamic headroom, which allows it to put out considerably more power for musical peaks, and the oversized power supply is able to cope with lower-impedance loads and double the rated power before dipping into that amazing headroom. Truly a fantastic amp, with construction not often seen these days! From a smoke-free home.

Proton AA-1150 Dual-Mono Amplifier, Extremely Nice!!

End: 29.12. 2023 21:59:36 on Friday
  • Condition: Used
  • Price: 721.31 EUR Auktion
  • Status: unsold
  • Item number: 116015064866
  • Bids: 0
  • Seller: jimkrell (607|100.0%)
  • Seller information: non commercial
  • Item location: Portland, Oregon USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This is a rare, vintage amplifier from Proton, with an advanced Dual-Mono design. It is in extremely nice condition, and has had the green illumination replaced after the bulbs finally went out. These have been replaced with a wonderful blue for a slightly updated look. The amplifier has an amazing 7db of dynamic headroom, which allows it to put out considerably more power for musical peaks, and the oversized power supply is able to cope with lower-impedance loads and double the rated power before dipping into that amazing headroom. Truly a fantastic amp, with construction not often seen these days! From a smoke-free home.