Rare Bohlender Graebener The Radia Series planar-hybrid center channel speaker. Impedence is 4 ohms, measures 4.5 ohms dc resistance, rated 50-250 watts. Model 220, serial # 01522. Measures 39 wide x 11 1/2 deep and 8 high. Very heavy at 55 lbs.!!From a estate, was told was working and removed from a huge home theater system.Sold as is as with all electronics.

Bohlender Graebener Radia Center Channel Speaker Model 220. Black with Aluminum/Silver Trims. Lightly used. Audiophile Quality Center Channel for High End Systems. Comes from Non-Smoking home. Have original box and packaging.Speaker Specs:Type:Hybrid planar/cone, center Tweeter (size in inches, type): 3, planar ribbon Midrange (size in inches, type): 8, planar ribbon (2) Woofer (size in inches, type):6.5, paper cone (2) Nominal Impedance (ohms):4 Recommended Amp Power (watts):50–250 Available Finishes:Black Dimensions (H x W x D, inches):8.25 x 41 x 12 Weight (pounds): 52 Price When New: $1,699

1 Bohlender - Graebener BG Radia PDR-8 & SLS Loudspeakers In-Wall Planar Speaker

Up for sale here is a set of 3 Bohlender Graebener R17i Speakers all 3 speakers are in perfect working condition and sound great also they are in nice cosmetic condition just for you to know one speaker is missing the logo in front and back please look at the photos for more details because exactly what you see in the photos is exactly what you are going to get Enhance your home audio experience with this 3 piece set of Bohlender Graebener R17i front LCR speakers. These bookshelf speakers are perfect for a wired connectivity system and are designed to provide high-quality sound. The brand is well-known for its durable and reliable products, and this model is no exception. Ideal for use in consumer electronics, TV, video, and home audio setups, these speakers are a great addition to any home. They are easy to install and use, and their compact design makes them perfect for small spaces. Upgrade your home speaker setup with this fantastic set today ! Please know that I don't ship to PO BOXES If you have any questions please to message. Shipping and Handling: Lower 48 states only via Fedex Home Delivery. NO - PR, HI or AK. If you are from those area Additional shipping cost will be added. Item u be packed after payment is received and it will be shipped within 24 hrs as soon as The payment Clears All items will contain tamper proof hologram warranty stickers to avoid parts swapping. If stickers are removed all claims will be voided. Please note that if auction ended on a Friday, Saturday or Sunday item will dropped off at Fedex the NEXT BUSINESS DAY *We do not ship on weekends and holidays until the next business day.(MONDAY) STRICTLY No international bidders!! EXCEPT FOR EBAY GLOBAL SHIPPING PARTNERS. Bidders . For international buyers Note: Buyers pay import charges (including tax and customs fees) when purchasing items from another country. Import charges are generally based on the item's price, shipping weight, dimensions, country of origin, and taxes, duties, and fees of the destination country. Some listings show an estimated import charge because the seller is in Ebay Global Shipping Program, which lets buyers pay the import charge up front and receive items faster. The import charge in a listing is only an estimate that's based on the current or maximum bid, current Best Offer or counteroffer, or Buy It Now price. The actual import charges you'll pay will be shown at checkout. Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

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.

2x Bohlender & Graebener Hervorragende Tiefmitteltöner von BG Können bis 800 HZ eingesetzt werden. Waren ursprünglich in der Radia 520 verbaut. Unter unseren anderen anzeigen finden Sie die passende Frequenzweiche zu diesem Tiefmitteltöner. Verbaut waren Sie in einem geschlossen Gehäuse und können bereits ab 2 L Volumen. Also ideal für sehr kleine Gehäuse.

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.