A set of 2 BG Bohlender-Graebener Radia Series speakers. Includes two 520i Front Speakers. These Radia speakers are a rare commodity. Both speakers are in like new condition, function perfectly and visually mint condition, same as received new. Complete with all original manuals and packaging. One owner in smoke free pet free environment. Used only in Theater Room, thus very low hours. Also have 220i Radia Center Speaker which will be listed in another auction. For local pickup only, unless buyer wants to arrange shipping. BG speakers only, other components in pics are not included, these will be in other listings. Serious buyers only, I will not respond to low ball offers.

Very good condition Bolander Grabner hybrid center channel speaker, with two 5” cone drivers and a 3” ribbon tweeter.

2 Stück Hochtöner Bohlender & Graebener Neo 3 gut erhalten und nochmals am Generator getestet Zustand : siehe Fotos technische Daten : Resonanzfrequenz Fs DC-Widerstand Rdc Mechanische Güte Qms Elektrische Güte Qes Gesamtgüte Qts Wirkungsgrad Eta (1m, 2.83V, Halbraum) 1648 Hz (+/-1.3%) 3.48 Ohm (+/-0.6%) 1.312 (+/-17.5%) 37.546 (+/-18.8%) 1.268 (+/-17.6%) 93.12 dB (+/-0.28) ... weitere Informationen sind im Netz zu finden ... > wichtiger Hinweis für die Montage : an den Anschlußfahnen darf nicht gelötet werden ! >> Steckverbindung erforderlich ! Bitte folgende Hinweise beachten ! Dies ist eine Privatauktion ! keine Garantie, keine Rücknahme !tierfreier Nichtraucherhaushalt Bitte beachten Sie auch meine anderen Auktionen ! > die Waren werden ausschließlich an die bei ebay hinterlegte Adresse versendet

The RD-75 planar ribbon is extremely rare, no longer in production. It is the late David Graebener’s “ultimate transducer” magnum opus. Ultrawideband 100Hz-17KHz response; they combine incredibly low moving mass with the surface area of a 12” woofer and 200 watts power handling. 88dB sensitivity, they play very loud with no visible excursion, and have a fast, light, transparent character with large presentation and big stereo image. 7.5 octaves bandwidth from a single driver. For 12 years this pair of Bohlender-Graebener RD-75 ribbons were the centerpiece of my “Ultimate 2 Way System.” These RD-75s are mounted in a closed-back box (monopole, not dipole). The speakers are in excellent condition, built in 2005. Well cared-for. The cabinets were custom made for me by 3DZ audio in Colorado Springs. Matte black finish has no significant scratches or blemishes. Baby grand piano not included :^> They need no crossover in the ultra-sensitive 2-5K region where the ear is most sensitive. This is why the sound is so top-to-bottom coherent. These line-source handcrafted ribbon drivers deliver transparency, resolution, and transient ability. The proprietary RD-75 ribbon driver uses an ultra-lightweight aluminum foil diaphragm suspended between powerful neodymium magnets. Properly integrated, the response is smooth and level everywhere throughout the room. You can stand up, sit down, or even lay on the floor, and sound is consistent everywhere. This design minimizes floor and ceiling reflections. As soon as your ear rises above 6 feet elevation, the high frequencies vanish. That’s because the ribbon emits a cylindrical wave that does not reach the ceiling. You clearly hear every layer of detail in the recording. Vocals are lush and full and transparent. Percussion has clarity and drive. Plucked strings are almost visceral, when they need to be. One of the most remarkable aspects of the RD-75 is its ability to capture the attack and decay of musical notes with startling realism. The ribbon drivers lightning-fast response, combined with their exceptional linearity, ensures that even the most dynamic passages are reproduced with effortless precision and authority. Measurements and photos were taken this morning, which you see in the photos: Frequency response, several distances, on axis, left and right channels averaged together.Step response. Extremely clean with no phase reversals.Spectacular impulse response2nd and 3rd harmonic distortion below 1% above 150Hz Phase response, which is +/-30 degrees from 200Hz-15Khz. Unheard of.Notice the graph of Left/Right responses overlaid in real room. Im 95% sure the differences below 500Hz are because of the different position of the speaker in the room, not differences between the drivers; which match to within 1dB for great imaging.Because the ribbon is a line source (and not a point source), SPL drops 3dB each time you double distance, compared to almost all other speakers which drop 6dB each time you double distance. Greater projection for large rooms, and wider stereo image sweet spot for small rooms. Impedance is 6 ohms, resistive and almost straight-line flat. Super easy to drive. I used these in biamp configuration with active DSP crossovers. You can also use these with passive crossovers. If so, they need a notch filter to pad down the area around 5K. The schematic is available for that, just message me. I recommend using them above 200Hz with 12dB/octave crossovers. If you have a couple of woofers or subs with accurate low-midrange response and a DSP, its pretty easy to put together a fantastic sounding system that rivals commercial designs costing 10-20X the price. If you wish to use these dipole, you can take the backs off of the enclosures or take the RD-75’s out of the enclosures. Any mods are up to you. In my application, I was easily able to attain near perfect frequency, impulse, step and phase response with a 2-way system - at listener position in a real room with zero crossover voodoo (no exotic FIR filters, just standard 12dB slopes). Almost impossible to pull off with any other driver. Guaranteed to work as described. No other warranty, and I do not accept returns. The speakers MUST be crossed over at 150Hz or above, either passive or active. Match to suitable woofers. DIMENSIONS: Main enclosure: 76.75H x 14W x 5.5D Base: 18W x 14D Pick up from my home in Chicago. Shipping and packaging in continental USA only, will take time to arrange.

Bohlender Graebener Neo 8 PDR As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 3W As is. Let me know if you have any questions.

i have a pair of these ribbon speakers. One of them has a puncture in the ribbon. See photos. Both speakers work, sound good, and ohm out at 5.7 ohms. One of them has a mounting frame while the other is the speaker only. Local pickup only due to their size.

Listing is for 1 pair . Brand new high end in wall speakers. These are fantastic sounding! Selling as parts or repair due to the nature of this website. Returns not accepted. The drivers and crossover in this in wall setup are outstanding and could be used to make a wonderful 8-in two-way speaker. Top notch component. A pair of 8-in woofers of this quality would cost you more than what Im selling these for . I have 2 pair brand new in box. They are listed as parts or repair due to the nature of this website. Below are some specs. Thank you for looking and have a great day! The largest In-Wall / In-Ceiling model in the PD Series of custom loudspeakers, the PD-8i is capable of filling large spaces with richly detailed, natural sound. With the proprietary Neo3PDR planar ribbon tweeter, it also minimizes any floor or ceiling reflections, improving the sound clarity and accuracy for an impressive home theater or two-channel experience. To add to the tweeters excellent dispersion and resolution, the PD-8i features an innovative woofer with high excursion capabilities and very low distortion. This high tech woofer design makes use of compact (but powerful) Neodymium magnets to provide an acoustically transparent woofer chassis which dramatically improves midrange clarity by eliminating sound reflections directly behind the woofer. The superior Kevlar cone woofers used in the PD Series not only provide superior two-channel clarity but are also capable of achieving the extreme dynamics associated with high performance home theater applications. As with the entire PD Series, the PD-8i is crafted from high impact, poly-composite frames that are well suited for the entire home. Rugged, paintable surfaces are the perfect architectural complement for custom installations. Crisp and clear.versatile.The PD-8i makes design and install of a high performance In-Wall or In-Ceiling sound system not only possible but remarkably simple. Exclusive wide dispersion patented wideband PDR planar ribbontweeter for an extremely wide sweet spot over the entire listening environment. Powerful Kevlar cone woofer feature a rubber surround, Neodymium magnet and acoustically transparent chassis for high output with minimal distortion. Easy to install, Improved poly-composite frames (paintable), rust-resistant metal grills and glass-filled composite toggle clamps simplify installation. GENERAL PARAMETERS: Description: 2-way hybrid array Dimensions:10 1/16 x 12 11/16 Weight:3.3 lbs. Cutout Size:8 15/16 x 12 3/4 Installed Depth:3 7/8 from surface Driver Complement:1 x 8 Kevlar cone, Neo magnet woofer /1 x Neo3PDR planar ribbon tweeter Nominal Impedance:8 ohms Frequency Response:50 Hz - 25 kHz (-6dB, half space) Power Handling:100 W RMS Sensitivity:88 dB/1W/1M Crossover Frequency:2.3 kHz, passive Adjustments:-3 dB, 0 dB, +3 dB tweeter level adjustment Installation:high-quality, glass-filled, composite dogtoggle clampsfor easy mounting in panel thicknesses from 1/4 - 1 5/8

I have four (4) sealed new great B&G BG Bohlender Graebener Neo8PDR Tweeters for sale. I am going to sell them ONE (1) piece at a time. I will offer discounts for multiple units if more than the one piece this ad is for. If that shoud happen to be the case message me and we can work that out before hand of course. It will go out wrapped very snuggly in bubble wrap to you.

The RD75 speaker is designed for applications where a flat, resistive impedance and wide frequency response are desired.The aluminum ribbon conductor combined with a tensioned polyester film diaphragm suggests that this is a type of ribbon or planar magnetic driver, known for their detailed and clear sound reproduction.In practical terms, when designing or incorporating this driver into a system, it would be important to use an appropriate crossover network (at least 12 dB/octave at 150 Hz or higher) to ensure longevity and avoid pushing frequencies to the speaker that it isnt designed to handle.The sensitivity of 88 dB means that for every watt of power provided to the speaker, it will produce a sound pressure level of 88 dB when measured from 2 meters away.Bohlender Graebener (BG) was a company located in Carson City, Nevada, that produced high-quality planar magnetic audio transducers from 70s to about 201x.They have been available for DIY or sold directly to manufacturers and many ultra hi-end speaker brands choose those drivers such as Genesis due to their design. This version is RD-75 and those are top of the line models, speakers are huge,looking at the RD-75, you realize that 144 in2 is not too shabby for a mid/high frequency driver. Because of this large area, the RD-75 diaphragm moves a relatively short distance even at high volume levels, resulting in lower IM distortion.And the most endearing feature of these drivers is that they cover the mid/high frequency range in one driver, including the all-important human voice range.Those drivers can present a huge soundstage and extremely transparent mid/highs to almost any music reproduced. I have used those speakers in dipole variation for quite a long time and with a progression of DSP and room correction systems lately I decided to keep only one pair to satisfy my needs.Units have been connected to amplifier over digital crossover while always having a passive High-pass filter (HPF) filter protecting their membranes. While you can find a pair or 2 on the used market they become very rare. This pair is in excellent condition and well maintained. I hope it can find a new home and owner.Model: RD75Effective Frequency Range, Sealed Enclosure (-6dB from average SPL): 125 Hz – 20 kHzFrequency Response, Sealed Enclosure, 1m, with Notch Filter: 150 Hz – 18,500 Hz ± 3dBImpedance: 6 ohms, resistiveSensitivity (Equivalent to 1W/1m, Measured at 2m): 88 dBDiaphragm: Tensioned Polyester film with laminated aluminum ribbon conductorsMagnet System (All drivers are magnetically shielded): Symmetric, push-pull, with Ceramic 8 magnets enclosed in a steel chassisPower Handling:RMS: 100 WProgram: 200 WPeak: 400 WCrossover Network Recommendations: 150 Hz, minimum 12 dB/oct. electrical minimumDimensions (H x W x D): 75.563 x 4.675 x 1.53Weight: 35.5 lbs.Diaphragms:PolyesterPolyethylene napthaliate (PEN)Polyamide (Kapton)Conductors:Deposited aluminumEtched aluminumEtched copperVarious surface applied wound metal wiresFrames:Carbon steelStainless steelVarious molded plasticsMagnetic Materials:Strontium-ferrite ceramicIsotropic and non-isotropic alnicoSamarium-cobaltNeodymium-ferrite-boronDue to size/wight it is a pickup/deliver option only for Richmond VA, Northern VA, DC Metro area

Bohlender Graebener Neo 8 PDR As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 3W As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 3M As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 1 As is. Let me know if you have any questions.

I have four (4) sealed new great B&G BG Bohlender Graebener Neo8PDR Tweeters for sale. I am going to sell them ONE (1) piece at a time. I will offer discounts for multiple units if more than the one piece this ad is for. If that shoud happen to be the case message me and we can work that out before hand of course. It will go out wrapped very snuggly in bubble wrap to you.

Listing is for 1 pair . Brand new high end in wall speakers. These are fantastic sounding! Selling as parts or repair due to the nature of this website. Returns not accepted. The drivers and crossover in this in wall setup are outstanding and could be used to make a wonderful 8-in two-way speaker. Top notch component. A pair of 8-in woofers of this quality would cost you more than what Im selling these for . I have 2 pair brand new in box. They are listed as parts or repair due to the nature of this website. Below are some specs. Thank you for looking and have a great day! The largest In-Wall / In-Ceiling model in the PD Series of custom loudspeakers, the PD-8i is capable of filling large spaces with richly detailed, natural sound. With the proprietary Neo3PDR planar ribbon tweeter, it also minimizes any floor or ceiling reflections, improving the sound clarity and accuracy for an impressive home theater or two-channel experience. To add to the tweeters excellent dispersion and resolution, the PD-8i features an innovative woofer with high excursion capabilities and very low distortion. This high tech woofer design makes use of compact (but powerful) Neodymium magnets to provide an acoustically transparent woofer chassis which dramatically improves midrange clarity by eliminating sound reflections directly behind the woofer. The superior Kevlar cone woofers used in the PD Series not only provide superior two-channel clarity but are also capable of achieving the extreme dynamics associated with high performance home theater applications. As with the entire PD Series, the PD-8i is crafted from high impact, poly-composite frames that are well suited for the entire home. Rugged, paintable surfaces are the perfect architectural complement for custom installations. Crisp and clear.versatile.The PD-8i makes design and install of a high performance In-Wall or In-Ceiling sound system not only possible but remarkably simple. Exclusive wide dispersion patented wideband PDR planar ribbontweeter for an extremely wide sweet spot over the entire listening environment. Powerful Kevlar cone woofer feature a rubber surround, Neodymium magnet and acoustically transparent chassis for high output with minimal distortion. Easy to install, Improved poly-composite frames (paintable), rust-resistant metal grills and glass-filled composite toggle clamps simplify installation. GENERAL PARAMETERS: Description: 2-way hybrid array Dimensions:10 1/16 x 12 11/16 Weight:3.3 lbs. Cutout Size:8 15/16 x 12 3/4 Installed Depth:3 7/8 from surface Driver Complement:1 x 8 Kevlar cone, Neo magnet woofer /1 x Neo3PDR planar ribbon tweeter Nominal Impedance:8 ohms Frequency Response:50 Hz - 25 kHz (-6dB, half space) Power Handling:100 W RMS Sensitivity:88 dB/1W/1M Crossover Frequency:2.3 kHz, passive Adjustments:-3 dB, 0 dB, +3 dB tweeter level adjustment Installation:high-quality, glass-filled, composite dogtoggle clampsfor easy mounting in panel thicknesses from 1/4 - 1 5/8

I have four (4) sealed new great B&G BG Bohlender Graebener Neo8PDR Tweeters for sale. I am going to sell them ONE (1) piece at a time. I will offer discounts for multiple units if more than the one piece this ad is for. If that shoud happen to be the case message me and we can work that out before hand of course. It will go out wrapped very snuggly in bubble wrap to you.

Listing is for 1 pair . Brand new high end in wall speakers. These are fantastic sounding! Selling as parts or repair due to the nature of this website. Returns not accepted. The drivers and crossover in this in wall setup are outstanding and could be used to make a wonderful 8-in two-way speaker. Top notch component. A pair of 8-in woofers of this quality would cost you more than what Im selling these for . I have 2 pair brand new in box. They are listed as parts or repair due to the nature of this website. Below are some specs. Thank you for looking and have a great day! The largest In-Wall / In-Ceiling model in the PD Series of custom loudspeakers, the PD-8i is capable of filling large spaces with richly detailed, natural sound. With the proprietary Neo3PDR planar ribbon tweeter, it also minimizes any floor or ceiling reflections, improving the sound clarity and accuracy for an impressive home theater or two-channel experience. To add to the tweeters excellent dispersion and resolution, the PD-8i features an innovative woofer with high excursion capabilities and very low distortion. This high tech woofer design makes use of compact (but powerful) Neodymium magnets to provide an acoustically transparent woofer chassis which dramatically improves midrange clarity by eliminating sound reflections directly behind the woofer. The superior Kevlar cone woofers used in the PD Series not only provide superior two-channel clarity but are also capable of achieving the extreme dynamics associated with high performance home theater applications. As with the entire PD Series, the PD-8i is crafted from high impact, poly-composite frames that are well suited for the entire home. Rugged, paintable surfaces are the perfect architectural complement for custom installations. Crisp and clear.versatile.The PD-8i makes design and install of a high performance In-Wall or In-Ceiling sound system not only possible but remarkably simple. Exclusive wide dispersion patented wideband PDR planar ribbontweeter for an extremely wide sweet spot over the entire listening environment. Powerful Kevlar cone woofer feature a rubber surround, Neodymium magnet and acoustically transparent chassis for high output with minimal distortion. Easy to install, Improved poly-composite frames (paintable), rust-resistant metal grills and glass-filled composite toggle clamps simplify installation. GENERAL PARAMETERS: Description: 2-way hybrid array Dimensions:10 1/16 x 12 11/16 Weight:3.3 lbs. Cutout Size:8 15/16 x 12 3/4 Installed Depth:3 7/8 from surface Driver Complement:1 x 8 Kevlar cone, Neo magnet woofer /1 x Neo3PDR planar ribbon tweeter Nominal Impedance:8 ohms Frequency Response:50 Hz - 25 kHz (-6dB, half space) Power Handling:100 W RMS Sensitivity:88 dB/1W/1M Crossover Frequency:2.3 kHz, passive Adjustments:-3 dB, 0 dB, +3 dB tweeter level adjustment Installation:high-quality, glass-filled, composite dogtoggle clampsfor easy mounting in panel thicknesses from 1/4 - 1 5/8

Bohlender Graebener Neo 8 PDR As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 3M As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 3W As is. Let me know if you have any questions.

Pair of Bohlender Graebener Neo 1 As is. Let me know if you have any questions.

B&G Radia Model 420 Bohlender-Graebener Floor Standing Towers Planar-Hybrid Great condition of this pair of speakers is EXCELLENT!  Includes: 2 Tower Speakers . Center speaker sold separately here: https://www.ebay.com/itm/166443453440?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=k2EEIo_PQF2&sssrc=0&ssuid=k2EEIo_PQF2&var=&widget_ver=artemis&media=COPY These are fully tested and no issues found. Sound quality and performance are outstanding.  ????Video: https://www.loom.com/share/b61f09786f0a4f768be177bf7cf4ca5d (Does not include the small subwoofer shown in video nor the Center Speaker) Included with this sale: Tall Tower Speakers only. Shipping: Shipping within the Continental USA is approximately $199. This includes adequate protection and shipping via Express.  These are estimates only... please confirm exact cost prior to purchase. Cosmetic condition These look mint! Little or no cosmetic blemishes. Please view all of our high-resolution photos for full details of the cosmetic condition as well as exactly what is included. If something is not clear, please inquire with us prior to purchase.

This pair of planar transducers from Bohlender Graebener Corporation is a great addition to any audio set up. These were obtained from the estate of an avid audiophile. His home was set up with state of the art equipment throughout. These units have been in storage for several years as backups. These will be shipped individually ( 2 separate cartons)