Title: Vintage Proton 690 Multichannel Television Sound Decoder (POWER-TESTED) Item Attributes Brand: Proton Model: Proton 690 Color: Black Type: Stereo Receiver CONDITION:Used Decoder has been power tested but was not able to complete further testing. In otherwise nice, clean condition. There is some slight cosmetic wear from use but in otherwise great condition! Vintage Proton 690 Multichannel Television Sound Decoder. Decoder has been power tested but was not able to complete further testing. In otherwise nice, clean condition. There is some slight cosmetic wear from use but in otherwise great condition! For more information regarding product information and wear, please refer to photos! Disclaimer *YOU ARE ENCOURAGED TO READ THE FOLLOWING DESCRIPTION BEFORE BIDDING* PRODUCTS DISCLAIMER: Please note that all items listed have been donated. Lots are unsorted, unless otherwise noted. We do our best to ensure the quality of all our auctions. Please remember we are not experts in any field. Items may contain unseen flaws not noted in the description. All items are sold AS IS. If you need further information about an item, please contact us prior to the close of the auction. ELECTRONICS INFORMATION: Items have not been professionally tested or serviced. All items are used and untested (including battery life and functionality), unless otherwise noted. TERMS OF SALE: Orders must be paid for within seven (7) days from the close of auction. All orders not paid within ten (10) days from the close of auction will be relisted for auction without further notice. Displays used to stage product are not included in the purchase. SHIPPING: Items $100 or more will be insured and require a signature. WEIGHT & DIMENSIONS: Weight:6.00 Shipping Weight:11.00 Dimensions:17.00 x 9.00 x 3.00

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.

This listing is for one amplifier. Its the 2nd of the two of these amps I had. The other one was sold. This one had the LED lamp replacement. Otherwise, it was identical to the other one, having been manufactured on the same day. In the video, its the one on top, with the brighter more blue VU meters. 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, 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. I have in the past used them to bi-amp my floorstanding 3-way speakers. But I really didnt need two of these for any of my speakers, but they just looked so beautiful and impressive together. Anyway, I hope you would consider this beautiful and super rare amp. Edit: Heres a link to a review of Proton aa-2120 -- 440 watts per channel into 2 ohm load at clipping point! https://www.hifi-classic.net/review/proton-aa-2120-56.html

amazing condition. New led lights. Upgraded rca jacks to chassis mounts ( a known issue with these). New speaker relay ( also known failure area). If you’re reading this you probably know what this is. One of the most dynamically powerful ampliers ever. 2ohm stable. Specs in photos I’ve added the amp dyno specs in last picture. This will be carefully packed for shipping

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 D1200 Stereo Power Amplifier

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!

THE UNIT POWERS ON AND LIGHTS UP. THAT WAS THE EXTENT OF ANY TESTING.SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.

THE UNIT POWERS ON AND LIGHTS UP. THAT WAS THE EXTENT OF ANY TESTING.SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.

Proton AA-1150 Vintage Stereo Power AmplifierThis amps works other than the following issue. There is periodic scratchiness from both channels when music is playing. This issues seems to improve at higher volume levels! Amp is being SOLD AS-IS! Both lights and meters working Light Signs of Shelve wear on upper air vent Small Scratches and scuffs around the unit very well maintained Please refer to photos for more details

Willkommen zu meinem Angebot !Sie bieten hier auf :Vollverstärker Proton D540 in Funktion vorwiegend als Vorverstärker genutztleichte Aussetzer im untersten Lautstärkebereichbehebbar durch Drehen des Volumenreglers Ansonsten technisch in Ordnung ist bis zum Verkauf noch in Gebrauch. mit Gebrauchsspuren, siehe Bilder no shipping outside Germany Versand als Paket bis 31kg per Dhl + Polsterung : 25 Euro nur Deutschlandoder Abholung : - mit Barzahlung innerhalb 3 Tagen nach Auktionsendeoder Bezahlung innerhalb 3 Tagen nach Kauf und Abholung innerhalb einer Wochesollten Sie sachliche Fragen zum Artikel haben- vor Gebotsabgabe -erreichen Sie mich über die im Angebot enthaltene Funktion dieser Plattform- geantwortet wird innerhalb und bis 12 Stunden vor Ende des Angebots Da es sich um einen Privatverkauf handelt, kann ich keine Garantie nach neuem EU-Recht übernehmen. Der Bieter erklärt sich damit einverstanden und erkennt dies mit seinem Gebot an! Demnach erfolgt der Verkauf unter Ausschluss jeglicher Gewährleistung, Garantie , Sachmängelhaftung , Nachverhandlungen oder Rücknahme! Die von mir erstellten abgebildeten Fotos dienen der Veranschaulichung für Sie - nicht der Werbung oder um eine Nähe zum Inhaber der Rechte vorzuspiegeln. Die angegebenen Namen sind rechtlich geschützt und werden hier nur verwendet, weil sie Bestandteil des Produktes sind.

THE UNIT POWERS ON AND LIGHTS UP. THAT WAS THE EXTENT OF ANY TESTING.SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.

PROTONVintage Proton D1200 2-Channel Power Amplifier Great sound !!! Excellent ++++Used. In Excellent working & cosmetic condition.All functions and meters work great.LED Meters and power lights upgraded.

SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.

Willkommen zu meinem Angebot !Sie bieten hier auf :Vollverstärker Proton D540 in Funktion vorwiegend als Vorverstärker genutztleichte Aussetzer im untersten Lautstärkebereichbehebbar durch Drehen des Volumenreglers Ansonsten technisch in Ordnung ist bis zum Verkauf noch in Gebrauch. mit Gebrauchsspuren, siehe Bilder no shipping outside Germany Versand als Paket bis 31kg per Dhl + Polsterung : 25 Euro nur Deutschlandoder Abholung : - mit Barzahlung innerhalb 3 Tagen nach Auktionsendeoder Bezahlung innerhalb 3 Tagen nach Kauf und Abholung innerhalb einer Wochesollten Sie sachliche Fragen zum Artikel haben- vor Gebotsabgabe -erreichen Sie mich über die im Angebot enthaltene Funktion dieser Plattform- geantwortet wird innerhalb und bis 12 Stunden vor Ende des Angebots Da es sich um einen Privatverkauf handelt, kann ich keine Garantie nach neuem EU-Recht übernehmen. Der Bieter erklärt sich damit einverstanden und erkennt dies mit seinem Gebot an! Demnach erfolgt der Verkauf unter Ausschluss jeglicher Gewährleistung, Garantie , Sachmängelhaftung , Nachverhandlungen oder Rücknahme! Die von mir erstellten abgebildeten Fotos dienen der Veranschaulichung für Sie - nicht der Werbung oder um eine Nähe zum Inhaber der Rechte vorzuspiegeln. Die angegebenen Namen sind rechtlich geschützt und werden hier nur verwendet, weil sie Bestandteil des Produktes sind.

You can write us in German, English, French or Italian Proton AM-452 Vollverstärker mit schönem Klang. Optischer Zustand siehe Bilder, mit Gebrauchsspuren Das Gerät ist geprüft und gewartet, voll funktionsfähig. Power output: 25 watts per channel into 8? (stereo) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.02% Damping factor: 100 Input sensitivity: 2.5mV (MM), 150mV (line) Signal to noise ratio: 85dB (MM), 100dB (line) Speaker load impedance: 4? (minimum) Dimensions: 446 x 80 x 332mm Weight: 6kg Ohne weiteres Zubehör!Hinweis: Der Umwelt zuliebe verwenden wir in der Regel gebrauchte Kartons, auch wenn sie nicht mehr so schön sind. Wir bitten um Verständnis.

SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.

Proton D1200 Vintage Stereo Power AmplifierFully tested and working great! Both lights and meters working Light Signs of Shelve wear on upper air vent Small Scratches and scuffs around the unit very well maintained Please refer to photos for more details

This is a great vintage stereo amplifier.Rated at 100 wpm but can produce enormous short term power when necessary. (Search YouTube for tests!)I refreshed this amp within the last year: So many other listings say their unit has been tested or serviced.Its typically not true - cleaned is not synonymous with serviced. Electrolytic Capacitors have been replaced and upgraded (with the exception of the four big caps, which tested fine).New relay installed.New chassis mount RCA inputs installed.These are a well known issue with this model. If you are looking at other offerings, make sure that the upgrade has been done,otherwise eventually your amp will have intermittent audio - possibly damaging your speakers.New Green LED lamps installed in the meters and power switch.Professionally powder coated cover.I have a different cover that has been stripped. I would reduce the price of this transaction by $50 if the buyer prefersto have me install/ship the unit with the stripped cover. I have not had the opportunity to have it powder coated. The faceplate has faded a bit - this common.The top of the faceplate has some small scratches, most likely from when gear was placed on top of it.I still have another unit in my system... need to lighten up the collection. Even though I have refreshed, tested this unit - due to the nature of vintage electronics - this is an AS IS sale.

Willkommen zu meinem Angebot !Sie bieten hier auf :Vollverstärker Proton D540 in Funktion vorwiegend als Vorverstärker genutztleichte Aussetzer im untersten Lautstärkebereichbehebbar durch Drehen des Volumenreglersdieser sollte gereinigt werden...Ansonsten technisch in Ordnung ist bis zum Verkauf noch in Gebrauch. mit Gebrauchsspuren, siehe Bilder no shipping outside Germany Versand als Paket bis 31kg per Dhl + Polsterung : 25 Euro nur Deutschlandoder Abholung : - mit Barzahlung innerhalb 3 Tagen nach Auktionsendesollten Sie sachliche Fragen zum Artikel haben- vor Gebotsabgabe -erreichen Sie mich über die im Angebot enthaltene Funktion dieser Plattform- geantwortet wird innerhalb und bis 12 Stunden vor Ende des Angebots Da es sich um einen Privatverkauf handelt, kann ich keine Garantie nach neuem EU-Recht übernehmen. Der Bieter erklärt sich damit einverstanden und erkennt dies mit seinem Gebot an! Demnach erfolgt der Verkauf unter Ausschluss jeglicher Gewährleistung, Garantie , Sachmängelhaftung , Nachverhandlungen oder Rücknahme! Die von mir erstellten abgebildeten Fotos dienen der Veranschaulichung für Sie - nicht der Werbung oder um eine Nähe zum Inhaber der Rechte vorzuspiegeln. Die angegebenen Namen sind rechtlich geschützt und werden hier nur verwendet, weil sie Bestandteil des Produktes sind.

SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.

SOLD AS-IS FOR PARTS OR REPAIR. It may function properly but I have not fully tested it so I am selling it FOR PARTS OR REPAIR IN “AS-IS” CONDITION WITH ABSOLUTELY NO RETURNS ACCEPTED! This Proton D1200 Stereo Power Amplifier is a rare find for any audio enthusiast or collector. Although it is being sold for parts or repair, this amplifier still holds significant value due to its brand and type. With its sleek design and powerful features, this amplifier is sure to enhance any home audio setup.