Up for sale is my EXCELLENT CONDITION, PERFECT WORKING ADCOM GFA-555 II IN ORIGINAL BOX! Inputs 100k ?. Two gold-plated, Teflon-insulted brass RCA jacks. They are close enough together to make connection a breeze. Gain 27 dB. Input Sensitivity 1.75V for 200 W into 8 ?. 130 mV for 1 W into 8 ?. Rated Power Output 200 watts per channel into 8 ? from 20 - 20,000 Hz at less than 0.04% THD, both channels driven. 325 watts per channel into 4 ? from 20 - 20,000 Hz at less than 0.04% THD, both channels driven (requires fan option to do this for any length of time). 600 watts into 8 ? from 20 - 20,000 Hz at less than 0.04% THD, bridged mono (requires fan option to do this for any length of time). 850 watts into 4 ? from 20 - 20,000 Hz at less than 0.09% THD, bridged mono (requires fan option to do this for any length of time). Dynamic Headroom 2.5 dB at 4 ?. Power Bandwidth 1.7 - 100,000 Hz at - 3 dB. Frequency Response 10 - 20,000 Hz +0, -0.25 dB at 1 W RMS into 8 ?. Damping Factor Not less than 800 from 20 - 20,000 Hz into 8 ?. Noise Not less than -110dB down from 200 watts into 8 ?, A-weighted. Power Input 120 VAC 50-60 Hz. 72 VA idle. 1,500 VA maximum. 675 VA at 200 W into 8 ?. I measure 37.5 watts at idle, cold. 60 watts at idle, warm (0.73A). 92 Watts (1.09A) when delivering 1 watt per channel into 8 ?. 845 watts when delivering 265 watts per channel into 8 ?. It draws zero power when turned off because it has a real power switch. It's not like modern equipment that never really turns off and consumes power and remains a fire hazard any time its plugged in. The GFA-555 II is completely disconnected when switched off. Size Chassis: 6-3/4 x 17 x 12-3/16 inches (172 x 432 x 310 mm) HWD. Overall: 7-1/4 x 17 x 12-3/16 inches (185 x 432 x 310 mm) HWD. Weight 35 pounds (16 kg). 39 pounds (18 kg), packed. Quality Made in USA. The GFA-555 remained in the Adcom line until recently, when the company upgraded it to the GFA-555II, which is almost identical to the original but has several new construction and circuit features designed to enhance its performance. To reduce the amplifier’s already low distortion even further, the grounding system for its inputs has been changed to isolate them from the grounded sides of the speaker outputs. The basic circuitry of the amplifier has also been modified slightly to drive reactive loads with lower distortion. Other differences between the original and new versions of the amplifier involve small details that individually may not make an appreciable change in its performance but collectively constitute a distinct refinement. For example, the gold-plated input phono jacks now have Teflon insulation, and the internal point-to-point wiring uses oxygen-free copper (OFC) wire. A red led on the front of the amplifier glows when the thermal-protection circuit has shut it down, and the DC power-supply fuses, formerly inside the amplifier, are now on the rear so that they can be replaced more easily. The output-transistor heat sinks that occupy most of the rear apron are now larger, for better cooling, and have rounded corners to make it easier (and safer) to handle the amplifier, which weighs more than 30 pounds. The 700-watt toroidal power transformer has been enlarged, potted, and electrically improved to reduce its operating temperature and provide more reliable operation with difficult, low-impedance loads. FedEx grd shipping is 89.00 USA. No Alaska, Hawaii or PR shipping. PayPal, Apple Pay and more for payment options! Have a blessed day’

ADCOM GFA-555 II (Most famous sought after classic by the discriminating audiophile) BETTER THAN NEW INTERNALLY- MINT CONDITION OUTSIDE Here is another fine offering from the Audio Labs of Morris Electronic Repair Boutique This ADCOM GFA-555 II is a very rare classic. Plus you will not find many of these around for the lucky people that own them keep them! The design and power is second to none. At 200 watts per channel into 8 ohms, this baby will light up your Wilson Audio Sophia Series 3 speakers or anything else you may have in quality speakers. This is a very HIGH CURRENT amp. If you owned or liked the 555, you will love and go nut’s over the 555 II. The awesome sound stage and clean audio with super low THD, will knock your socks off and blow you away. I personally would put this 555 II up against the big boys like Krell - McIntosh - Jeff Rowland - Classe Audio - Etc. It will hold it’s own, if not easily surpass! Want to save a bundle on this amp contact me using the blue letters on the last picture BUT WAIT THERE’S MORE This particular GFA-555 II is very special, it has been upgraded with a Brand New double sided audio driver board with all brand new audio grade 1% tolerance components. Make no mistake this GFA-555 II is not your Dad’s 555 II. It will surpass anything out there in the 555 II world. It’s sonic sound stage is nothing short of awesome. If you have quality speakers & pre-amp to run this, you will lack for nothing in incredible listening pleasure from this power amplifier. This Amp is Perfection in Audio Reproduction. I am a one man shop, with 30 years as a electronic tech, so each piece of high quality audio equipment gets my personal attention, of which I repair, clean, adjust, and inspect everything as if I were keeping for my own. I have personally been completely through the internals of this 555 II power amp, insuring everything is to factory specs. I leave no stone unturned. So you can buy with confidence knowing you are going to receive a very high quality amplifier in perfect condition electronically. This unit (after initial check out on a Sencore PA-81 analyzer) has undergone hours of testing under load, driven by a Carver CD TL3200 music source, into a Harman Kardon 825 pre-amp and pair of Paradigm Esprit B/P 8 ohm 300 w Towers. PLEASE NOTE: When I refurbish a amplifier, I don’t just repair the problem and sell it. I completely disassemble it, meticulously clean everything, (just check the pictures) then I use Deoxit D-5 ® on all connections that needs this process. I make the internals better than new, so that you will have many-many years (min 25) of enjoyment from your new amp, without component failure or component degradation. (Excluding) shorted speaker wires, inferior speakers that can’t handle the power, or turning up the volume to the degree that you can fry eggs on the rear heat sinks. Or blow the windows out in your house. :-) All four electrolytic’s 47uf @160wvdc have been replaced with new Nichicon electrolytic capacitors upgraded to 100 uF 160 wvdc audio grade on the power output PCB’s. Also 4 .I uF 400 polypropylene caps were installed in parallel with the bypass caps.The driver bias voltage was adjusted to 9.5 mV per side.The driver transistors 4 each were upgraded with a higher break down voltage for more headroom.The rail caps have been tested as follows:C1 rated at 15,000 uF and allowable 9,000 uA leakage. Tested 15,100 uF / 300 uA.C2 rated at 15,000 uF and allowable 9,000 uA leakage. Tested 16,700 uf / 360 uA.C3 rated at 15,000 uF and allowable 9,000 uA leakage. Tested 16,300 uF / 350 uA.C4 rated at 15,000 uF and allowable 9,000 uA leakage. Tested 16,600 uF / 310 uA.The S/N# of this unit is 138007521This unit draws .5 amps at 116 VacThe DC offset is .7 mV on the left and .3 mV on the right this is super low, darn near perfect. I have also installed a IEC power receptacle and will come with detachable IEC power cord. This 555 II is bridgeable to operate in mono block mode, just by switching a small switch on the back plate. PLEASE NOTE: I only ship to 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. But you will appreciate the effort when it arrives undamaged. The Service manual & Owner manual will be included (reproduced from the original) plus amp spec sheet of the final parameters, along with a cover letter, so in the unlikely event you should have an issue, or even a general question you can contact me directly at my real Email address. Thank you for taking the time to read all my verbiage, this is one High Current Fantastic Powerhouse of an amplifier in like new, excellent condition. Any issues you should have I take care of them, Pronto! Period! This is why I maintain a 100% positive feedback.I answer all submitted questions.

Here’s a chance to own arguably Adcoms finest power amplifier in absolute mint condition at a “ priced to sell” cost. This GFA-555II is without a scratch or dent, works perfectly, clean and crisp, without distortion.. as it should. It has had a meticulously cared for life.. as part of a mono setup! Housed in a dust free, ventilated case, pushing a pair of Klipsch Cornwall 2’s.. the sound was just short of breathtaking!! Item will be shipped carefully packaged in original box. ( not all of original packaging) Make sure you have adequate speakers to let this unit show its colors and produce for you a complete mind blowing experience!!

Here’s a chance to own arguably Adcoms finest power amplifier in absolute mint condition at a “ priced to sell” cost. This GFA-555II is without a scratch or dent, works perfectly, clean and crisp, without distortion…as it should. It has had a meticulously cared for life..as part of a mono setup. Housed in a dust free , ventilated case, pushing pair of Klipsch Cornwall 2’s.. the sound was just short of breathtaking!! Item will be shipped carefully packaged in original box ( not all of original packaging) …Make sure you have adequate speakers to let this unit show its colors and produce for you a complete mind blowing listening experience!

ADCOM GFA-555 II Stereo Power Amplifier200 Watt-Per-Channel Audio Classics, Ltd. This amplifier is fully tested and works fine. Sounds Good. Cosmetic-wise,... the face is presentable. Back and sides have blemishes and some tarnish. Thanks for looking. Model / Serial GFA555II / 106561 Contiguous US Lower-48-State shipping, insurance and handling charges for this item will be $65.00, with signature required upon delivery. Please submit all inquiries regarding this item through the Ebay messaging system and ask All questions before committing to purchase. We will only ship to your Ebay/Paypal/Credit-Card Verified or Confirmed shipping address. We will not under-value this item or otherwise falsify our invoices or shipping documents for any reason.This item is available for sale only through Ebay.________________________________________________________________________________________________________

Item Information Item Description: This ADCOM GFA-555 II Stereo Power Amplifier is listed for parts/repair because the power cable has an indentation in it from something applying excessive forcer to it - this can be seen in the last image provided. Condition: There is also some surface corrosion and scratches mainly on the top surface which is visible in the second and third to last image provided. Testing Done: Tested and works properly, only listed for parts/repair because of the damaged power cable. No Additional Accessories, item will come as pictured. ARI R2v3 REC Equipment Categorizationhttps://docs.google.com/document/d/1CkH5Ja9mNviCFgWYQxORAP3026W44RczOkhHaOWPgOc/edit?usp=sharing Shipping and HandlingGood Point ships items USPS. We strive to ship out all paid items within one business day. International buyers, including Canada, please calculate the cost of shipping to your country before you bid. UPS charges COD brokerage fees, import taxes and other fees based on the final value of the eBay item being imported. Charges vary depending on country so please beware we cannot provide an estimate. These costs are the buyers responsibility and are separate from the fixed shipping. Local pick up: Please pick up your items within 2 weeks of payment. If you are unable to, we reserve the right to cancel your order and relist any items that have not been picked up. Our Return PolicyWe love our customers and want them to be happy with the items they have purchased. Please notify us as soon as possible if you believe there is a problem (or there has been damage in transit), and save all the original packing materials (necessary for carriers insurance claims). We offer a 60 day eBay guarantee, with a free replacement or refund within 60 days of delivery. Contact UsGood Point Recycling is open for local pickup and available to answer questions, Monday through Friday from 8:00AM to 3:00PM. We are closed on weekends and all major holidays. Need to contact us? Please use the eBay message system under the more actions hyperlink. Thank you for checking our listing. For more great deals, please see our Good Point Recycling eBay store!

ADCOM GFA-555 II Stereo Power Amplifier - 200 Watt Power Amp. Great working condition Fast shipping

ADCOM GFA-555 II Stereo Power Amplifier 200 WPC Power Amp.Works great and in good condition.Some scuffs, scratches or marks, see photos for details.

Adcom GFA-555 MKII w/ Original Manual. This amplifier is in excellent pre-owned condition. While not worth mentioning, it does have a single 1-2mm mark that doesnt look like a scratch on its top. It performs flawlessly and operates as it should. It has never been modified. This is an excellent example of this renowned amplifier. General Specifications:The amplifier is a stereo amplifier with a power output of 200 watts per channel into 8 ohms. It can also be bridged to mono mode, providing a power output of 600 watts into 8 ohms. The frequency response of the amplifier is typically 20 Hz to 20 kHz (+0, -0.25 dB) at 1 watt into 8 ohms. The THD of the amplifier is less than 0.03% at rated power into 8 ohms from 20 Hz to 20 kHz. The SNR of the amplifier is typically greater than 120 dB below rated output, A-weighted. The amplifier has a damping factor greater than 400 into 8 ohms. The input sensitivity of the amplifier is 1.5 volts for rated power into 8 ohms. Input Impedance: The input impedance of the amplifier is 100 kohms. The amplifier measures approximately 19 inches wide, 7 inches high, and 13 inches deep (48.3 cm x 17.8 cm x 33 cm). Professionally packed, double boxed and promptly shipped insured with signature confirmation. We know how to ship these and it will arrive in the condition as promised. Please review our feedback and buy with confidence.

adcom gfa-555 II power amplifier. It does power up and music will start playing I guess I just don’t know how to hook it up properly and I don’t have volume control so it will get loud right away.

ADCOM GFA-555 II Stereo Power Amplifier - 200 Watt Power Amp. Nice high end unit. Has been tested with complete system and works and sounds great. Lights scuffs is all and ready to add to any system!

(USED) Adcom GFA-555 MKII Power AmplifierCustomer trade-in. Great shape! Tested and fully working. Includes power amp and original box.# of Channels2RMS Power (Watts Per Channel)200 x 2 @ 8, 325 x 2 @ 4Amplifier FeaturesBridgeable Check out all my items on the audiolab-outletBe sure to add me to your favorites list! PLEASE READ OUR POLICIES BELOW Payments:Payments are accepted through PAYPAL ONLY. Payments must be made within 3 days of the sale of an item. Failure to pay within 3 days may result in cancellation of the sale OR an unpaid item case opened through eBay. IF YOU HAVE QUESTIONS, PLEASE MESSAGE US BEFORE BIDDING OR PURCHASING AN ITEM. Shipping:Shipping is to the confirmed address and will not be changed after the auction has ended. *** At this time we are NOT processing any shipments internationally or outside of the Lower Contiguous 48 States. AK & HI customers please inquire if you are interested in an item listed. Additional shipping may be required to process your order. We are also unable to ship our items to PO BOXES or APO/FPO addresses unless the item is small. Please inquire if you have any of these types of addresses *** Returns:ALL RETURNS MUST HAVE A RMA# FOR RETURN PROCESSING - Please contact us to obtain an RMA # We will accept items for return with 30 days of sale. Customers wishing to return product for any reasons other than the item being defective will be subject to paying for the cost of return shipping and a restocking fee. IN THE EVENT OF DAMAGE OR THE ITEM NOT AS DESCRIBED:Please contact us directly before opening any case or return request. We want to do everything in our power to offer the best Customer Service possible.

Selling a Adcom GFA-555 II Power Amplifier with copy of owners manual and box in its original found working condition. Estate Find. The estate was filled with high quaility electronics and unique collectibles.The amplifier was tested without issues. The black faceplate and metal cabinet are in prestine condition. What you see in the pictures is exactly what you will receive.I did not clean or polish but already looks new. See pictures for details and condition. Check my other listings for many unique hard to find electronics and collectibles.DescriptionThe Adcom GFA-555 represents the most advanced thinking in audio amplifier design. At 200 watts per channel, it offers exceptional value and superior performance at a reasonable price.SpecificationsPower output: 200 watts per channel into 8? (stereo), 600 watts into 8? (mono)Frequency response: 10Hz to 20kHzTotal harmonic distortion: 0.04%Damping factor: 800Gain: 27 dBInput sensitivity: 1.75VSignal to noise ratio: 110dBSemiconductors: 42 x transistors, 2 x zener diodes, 13 x diodes, 2 x IC, 2 x diode bridgesDimensions: 185 x 432 x 310mmWeight: 16kgShipping Terms: Insurance and a tracking number will be provided. Free Local Pickup. The amplifier will be double boxed to protect the original box for shipping. Contact me with any questions or comments. Seller Terms: Buyer must contact seller within 2 days and payment should be received otherwise the seller may either sell or relist the item. Any payment not received within 3 days of the end of the auction may result in the notification to Ebay under their non-paying bidder policy.

We Strive for nothing less than 5 Star FeedBack and 100% satisfied buyers!If for any reason you are not completely satisfied with your purchasebefore leaving feedback Please contact us with any questions or concerns. ADCOM GFA-555 II Power Amplifier With Manual Condition: This item is being sold pre owned. Item is in good cosmetic condition with some signs of previous use and in good working order. Please see photos for more details. Returns accepted 10% restocking feeIf there is anything wrong with the item or not as described, please contact me as soon as possible.Item is for sale as it came to us. All items pictured are included in auction. No other accessories are included in auction. Please read our descriptions and check our pictures for the best item explanation before purchase. We are a pawn shop. We do not know the history of the item or have personal use of it. Picture is actual item you will receive, please see pictures for best item description. Your item will typically ship within one business day but two at the latest. We ship with UPS Ground and they do not pickup on the weekends. If you purchase and item over the weekend it will be shipped out Monday! UPS will not ship to Alaska, Hawaii, or PO Boxs, be sure to use a proper address or you may not get your item. Be sure to check out our other items and save us as a favorite seller! Keep an eye on our auctions, you never know what we might have! We are a Pawn Shop and buy most of items from our walk-in customers. We appreciate you looking at our items, Good luck and Happy Bidding Item 389517 JM 5/24/23 KW

Adcom GFA-555 II Stereo Amplifier for parts or repair. This amp has been in dry Colorado storage for about 10 years. Before that it lived an easy life in my upstairs living room. I started using it again very recently. I had to adjust the balance a bit to the right to get both speakers to play at the same volume. I thought that perhaps the signal capacitors were shot. I replaced them with the exact value Mundorf film capacitors. I always thought the Adcom amp sounded great…I was surprised just how much better it now sounded. The bios was set perfectly but the balance was still off. After a couple of days listening the right channel started distorting and blew a fuse. The signal board failed. See pictures. A new board and components to repair the amp are available from various sources. I feel that this repair is over my head. Maybe someone will take on this amp.