This Power Amplifier is Tested and Functions Normally. Does NOT INCLUDE any additional items or accessories outside of what is shown in the product photos. Pre-Owned Item; Has Cosmetic Wear. Refer to photos for cosmetic imperfections. All items have been donated to help further our Mission in providing quality jobs for individuals with disabilities and other barriers. All items are USED unless stated otherwise within the listing itself. Visit us at ShopGoodwill.com for great deals on designer clothes, jewelry, collectibles and more! Customers satisfaction is our top priority. In the event you experience any problems with your order, please contact us prior to leaving a negative or neutral feedback and well be sure to resolve the issue. Disclaimers Payment Payment must be received within 4 calendar days of an items end date or your order may be cancelled without notice per eBays Unpaid Item Policy. Orders must be paid for through eBay prior to pickup. Payment will not be accepted at the pickup location for any reason. Shipping We ship using FedEx for Domestic (U.S.) Orders. International Orders are processed through the eBay Global Shipping Program. Please allow UP TO THREE (3) BUSINESS DAYS for your item to leave our facility after payment has cleared. A Business Day is defined as the the days of the week between Monday and Friday and EXCLUDES the days of Saturday and Sunday. A Business Day EXCLUDES any Federal (United States) Recognized Holidays (Examples: Christmas Day, Thanksgiving Day, etc.) For example, an item purchased on Friday may take up until the following Wednesday to ship out. We strive to answer all inquiries, however inquiries regarding Why hasnt ___ shipped? that are not labeled as Overdue (meaning items that have exceeded the within three business daysexpectation set on each order) will not be prioritized. We do not offer Priority/Next-Day/Urgent/etc. Shipping. All orders ship within three business days in the order that they were paid for. Tracking Number(s) will be updated in eBay once items have shipped. We ONLY ship internationally through the eBay Global Shipping Program. We DO NOT accept third party shipping labels. We offer combined shipping on Auction Items upon request prior to payment. Combined shipping is not offered on Buy It Now items. We do not ship to APOs or P.O. Boxes. A full physical address is required for shipment. No exceptions will be made. Failure to comply may result in your order being cancelled if a valid address is not provided. Local Pick-Up Pickups: Orders may be picked up from our retail storefront The Grid located at 5301 Wilkinson Blvd, Charlotte, NC 28208. Please use eBay messaging or call the store at least 24 hours in advance to confirm an appointment. Failure to schedule pickups in advance may result in an extended wait to be assisted or service being denied at the pickup location depending on staffing availability and the size of your order. Pickups can be scheduled between Monday-Friday 10 A.M. to 3:30 P.M. If you need to schedule a pickup outside of these hours, we are open to making arrangements to do so. Pickups must be arranged at least 24 hours prior to visiting the pickup location. You must personally pick up your items unless you specify ahead of time that a third party will be picking up your items on your behalf. All orders must be paid for in eBay prior to scheduling a pickup. We will not accept payment for eBay items through our retail storefront. Please enter the retail store and speak to an employee when you have arrived at the location for your item(s). Please be able to provide an employee with either your eBay Order Number(s) or your name as it appears in eBay for confirmation. Customer Service Our eBay Customer Service Operation runs Monday to Friday from 10:00 A.M. to 4:00 P.M. Eastern Standard Time (EST). Messages will be responded to in the order that they are received. If your message is sent outside of our service hours, on Weekends, or Holidays we will respond to you within 24 hours on the next Business Day of operation.

I bought this new in the mid-nineties. It has been a trusted companion through my entire adult life. It’s insanely powerful and sounds outstanding. Unfortunately, a few months ago, the right channel would occasionally turn off. I was told it was probably “a dirty speaker relay (the one you hear click when it turns on).” Since I now have less time to deal with things like this, I’m hoping a buyer will either clean the relay or fix this and enjoy it for years to come. At the time I disconnected it, both channels were working fine. But it’s an issue. I had the VU meter lamps changed to “forever” LED’s a few years ago. You can read about it here: https://www.hifi-classic.net/review/proton-aa-2120-56.html

Amplify your audio experience with the PROTON D1200 Stereo Power Amplifier. This black amplifier boasts two channels and four inputs, including stereo L/R RCA and raw cable speaker jacks, to connect to your favorite devices. It also has two outputs, including RCA and banana speaker jacks, to provide high-quality sound to your home audio system. Enjoy crystal-clear audio with this reliable and durable power amplifier, perfect for any home audio setup. The Proton D1200 model offers superior sound quality and performance, making it an excellent choice for music lovers and audiophiles. Get ready to enhance your audio experience with this top-of-the-line power amplifier. Voted the most powerful 100x2 Amplifier of its time with 6 db headroom this amplifier sounds wonderful . Please research for further info This was recently serviced by Tech RCA inputs were replaced and soldered direct (Upgrade for this product)All the display bulbs were replaced with the highest quality Green bulbs These are truly wonderful Amplifiers that produce very high sound levels in addition to very high quality .

PROTON D1200 Getestet, sauber und in ausgezeichnetem Betriebszustand!!! Beschreibung : Der Hochstromverstärker Proton D-1200 wurde sorgfältig mit Fokus auf Klangqualität entwickelt. Ein sehr seltener Verstärker, gebaut wie die begehrten Monoblöcke von Dynaco McIntosh, Marantz und anderen, aber verpackt in einem kompakten und leistungsstarken Paket. Ob als Ergänzung zu einem vorhandenen Audio- oder Videosystem oder als Teil eines völlig neuen Systems, Sie werden mit Sicherheit die Klarheit, Detailtreue und Leistungstiefe bemerken, die Proton-Produkte unabhängig vom Preis zu den besten der Welt machen. Der D1200-Leistungsverstärker von Proton verfügt über ein Dynamic Power on Demand (DPD)-Schaltungsdesign, das ihm einen außergewöhnlichen dynamischen Headroom von 7,3 dB bietet. Das DPD-System von Proton ist für einige der höchsten Ausgangsleistungen verantwortlich, die wir je von einem Verstärker gemessen haben. Spezifikationen : Ausgangsleistung: 100 Watt pro Kanal an 8 ? (Stereo), 1800 Watt an 2 ? (Mono) Frequenzgang: 20 Hz bis 20 kHz Gesamte harmonische Verzerrung: 0,02 % Dämpfungsfaktor: 250 Eingangsempfindlichkeit: 1V Signal-Rausch-Verhältnis: 120 dB THD bei Nennleistung 0,02 % Lautsprecherlastimpedanz: 2 ? bis 8 ? Abmessungen: 420 x 122 x 395 mm Gewicht: 15 kg IHF-Standard 20 ms Dauer: 540 W (8 Ohm) 1000 W (4 Ohm) 1500 W (2 Ohm) 100ms Dauer: 450 W (8 Ohm) 650 W (4 Ohm) 800 W (2 Ohm) 200 ms Dauer: 380 W (8 Ohm) 500 W (4 Ohm) 520 W (2 Ohm) Über den Klang... Da ich der landläufigen Meinung, dass gute Endstufen „anders“ klingen, nicht zustimme, kann ich zu diesem Thema nicht viel sagen. Bei diesem Verstärker waren die Auswirkungen der Hochpegeltransienten, die häufig das 6-dB-DPD-Licht zum Leuchten brachten und zu Messwerten über 400 Watt führten, geradezu atemberaubend. Nicht viele „100-Watt“-Verstärker können dieses Leistungsniveau erreichen. Der D1200 ist in Schwarz gehalten und verfügt über zwei große Leistungsmesser. Die logarithmischen Skalen der Messgeräte decken einen Bereich von einigen Milliwatt bis zu vielen hundert Watt (in 8 Ohm) ab, und die Zeiger haben eine schnelle Reaktionszeit, um Programmspitzen zu folgen. Auf der Rückseite des Verstärkers befinden sich isolierte Polklemmen-Lautsprecheranschlüsse, Eingangsbuchsen und ein Stereo/Mono-Schalter. Der D1200 ist 16-1/2 Zoll breit, 14-1/4 Zoll tief und 4-1/4 Zoll hoch und wiegt 35 Pfund. Kenner wissen, wovon ich spreche! Klicken Sie auf den Link unten, um eine vollständige Rezension des Proton D1200 zu erhalten http://www.hifi-classic.net/review/proton-d1200-165.html https://www.makern.de/2009/06/02/proton-d1200 Ich habe mehrere Proton D1200 bei eBay verkauft und alle Käufer sind mit ihrem Kauf zufrieden. *************English ************* Tested, Clean and in Excellent working condition !!! Description : The Proton D-1200 high current amplifier has been carefully developed with complete emphasis on the quality of sound. A very rare amplifier constructed like the sought after Mono blocks of Dynaco McIntosh, Marantz and others but put together in one compact and Powerful package. Whether adding to an existing audio or video system or as part of an all new system, you are certain to notice the clarity, detail and depth of performance which make Proton products among the best in the world, regardless of price. Proton’s D1200 power amplifier features a Dynamic Power on Demand (DPD) circuit design that gives it an extraordinary dynamic-headroom rating of 7.3 dB. Proton’s DPD system is responsible for some of the highest power outputs we have measured from any amplifier. Specifications : Power output: 100 watts per channel into 8? (stereo), 1800 watts into 2? (mono)Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.02% Damping factor: 250 Input sensitivity: 1V Signal to noise ratio: 120dB THD at rated power 0.02% Speaker load impedance: 2? to 8? Dimensions: 420 x 122 x 395mm Weight: 15kg IHF Standard 20ms duration : 540W (8 ohms)1000W (4 ohms)1500W (2 ohms) 100ms duration: 450W (8 ohms)650W (4 ohms)800W (2 ohms) 200ms duration: 380W (8 ohms)500W (4 ohms)520W (2 ohms) About the sound . . . well, since I do not subscribe to the popular notion that good power amplifiers sound “different” from each other, there is not much I can say on that subject. However, with this amplifier, the impact of the high-level transients—which often lit the 6-dB DPD light and produced meter readings of more than 400 watts— was nothing short of stunning. Not too many “100-watt” amplifiers can match that performance. The D1200 is finished in black, with two large power meters. The meters’ logarithmic scales span a range from a few milliwatts to many hundreds of watts (into 8 ohms), and the pointers have a rapid response time to follow program peaks. Insulated binding-post speaker connectors, input jacks, and a stereo/mono switch are in the rear of the amplifier. The D1200 measures 16-1/2 inches wide, 14-1/4 inches deep, and 4-1/4 inches high and weighs16 kg. Connoisseur know what Im talking about! Check the link below for a complete review of Proton D1200 http: //www.hifi-classic.net/review/proton-d1200-165.htmlhttps://www.mackern.de/2009/06/02/proton-d1200 I have sold few Proton D1200 on ebay and all the buyers are happy with the purchase.

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.

Used very gently excellent condition Comes with original box, cable and manual Experience high-quality sound with the Proton 301 Bi-Amplified Powered Companion 2-Way Speaker for 300 Radio. These bookshelf speakers are made by the renowned brand Proton and provide a 2.0 channel system configuration with a rectangular shape and black color that will easily complement any home audio setup. The speakers are wired and offer a powerful RMS power of 100 W. The model 301 is made in Taiwan and is ideal for use with TVs, videos, and home audio systems. Boost your home audio experience with Proton 301 speakers and enjoy high-quality sound.

Excellent condition overall with little to no wear. Both speakers have been used but look like new. Both power on and work correctly. I have only done a basic test. Include cables, manual and boxes. Speaker dimensions: 11 1/2 L x 8 W Speaker weight: 15 lbs each

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

*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

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.

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 D1200 power amplifier Nice condition, Better Than New Inside If you want to save a bundle on this amp contact me using the blue letters on the last picture THE AUDIO PRIZE AWAITS YOU Here is another fine offering from the audio labs of Morris Electronic Repair Boutique This proton D1200 is extremely rare. At 100 Watts / 8 and the ability at music passages to deliver up to 1,600 Watts of audio power for short duration makes this amp perform super well with most speakers. It sports a dual mono power supplies and a single power supply that runs the 100 watts out. At large music passages. the high current & voltage mono power supplies kick in. BUT WAIT THERES MORE This unit has been completely recapped, excluding the rail caps, which checked better than new. The bias setting have been set to factory specs. The VU meters lamps have been replaced with LEDs so they will last a lifetime. Also new speaker binding post have been install that are super rugged. and a IEC power connector, and will come with a generic IEC power cord. Also new Tiffany RCA input jacks have been installed. This unit have undergone hours of testing and burn in under load, driven by a Harman Kardon CD 491 player into a Harmon Kardon 825 preamp into Paradigm B/P Espirit 300 w Towers. Please Note: I only ship in the US. No international shipping! As always I pack everything with the best of materials, so as to thwart the gorilla UPS handlers. It will arrive alive and unscathed. This amp is very heavy and there is a small additional charge reflected in shipping cost for I pay a lot for proper packing materials. But you will appreciate the effort when they arrive undamaged. The service manual & owner manual will be included (reproduced from original) along with amplifier spec sheets on each amp after testing. And will carry a one year iron clad warranty against all parts & labor and I will pay the shipping both ways in the unlikely event an issue should occur. Thank you, for reading all the verbiage, Any issues you should have I take care of them, Pronto, Period! No Ifs, Ands or Buts. This is why I maintain a 100% positive feedback. I answer all submitted questions.

This listing is for one amplifier. Onix Dual Mono Power Amplifier A-2150 is a repackaged Proton AA-2120 amplifier. Proton VU Meter amplifiers are becoming more rare, and the AA-2120 is much more difficult to come by compared to the more common D1200 or the smaller AA-1150 at 50 watts per channel. Even that smaller amp has a reputation for being powerful, so you can imagine how much more powerful these larger amp are. Proton AA-2120 power amps were manufactured from 1993 for a few years and had a power rating of 120 watts per channel into 8 ohms. These are true dual mono amps that only share the power button, chassis and the power cord, so they are heavy for their size at 36lbs. Even more rare is the repackaged Onix A-2150. Other than the logos, they appear to be identical inside and out to the Proton AA-2120. They were manufactured in the late 1990s and had a bump to the power rating to 150 watts per channel. These amps are indeed very powerful and can easily shake your room. But they also sound very clear, especially in the midrange. As you can see in one of the photos and the video, Ive paired the Onix A-2150 with a pair of small bookshelf speakers (NHT Super Zeros). Ive been using it as my main amp for everyday use for watching Youtube or Netflix, because it just sounds so clear and concentrated. As for the condition, it works fine without any issues. Both VU meters work well. Appearance is very clean and well cared for. I replaced the feet to aftermarket metal ones as the rubber parts on original ones were disintegrating. I can include those if youd like. As you can see in the photo, I have two of these. I have in the past used them to bi-amp my floorstanding 3-way speakers. These are great looking amps to start with, but with two of them stacked, they really look beautiful. But honestly, these two combined are too powerful for me and my room. So, Im selling one. Of the two, the one Im selling is the one on top with the more green lamps (original bulbs). The other one had the bulbs burn out so I replaced the bulbs with LEDs and its much brighter. You may want to consider LED replacements in the future.

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.