This is for all three Adcom pieces First is the GFP - 565 Preamplifier which was Designed by Walt Jung and is a legendary preamp that is in perfect working condition and the original caps are in perfect working condition with absolutely no static in the controls and Ive owned it for 20 years and it needs nothing and has one of the best phono Preamplifiers Ive ever used Im also including the GFT 555 II tuner which matches the Preamplifier and Power Amplifier. And maybe the most underrated Amplifier Ive ever owned the GFA 535 which is the first generation that was designed by the legendary Nelson Pass . The claimed power is 60 wpc in 8ohms and 100 wpc in 4ohms but my speakers are very hard to drive and my previous Amplifier needed all of its 500wpc to push but miraculously this little amp makes them sound fantastic. Being used there are a couple of nicks but over all they in very good condition

Unit has been cleaned and biased.

ADCOM GFA-555 II STEREO POWER AMPLIFIER Working - Tested Excellent Condition - See Pictures Great Sound Local Pickup Available Description: The 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. Specifications:Power 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: 16kg

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisment is an exact reprint from 1991, it is printed on matte photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

HERES AN AMP THAT DOES NOT NEEDS NO INTRODUCTION AS IT HAS A REPUTATION OF BEING ONE OF THE BEST FOR THE MONEY. DESIGNED BY NELSON PASS AN ADCOM GFA-555 II HIGH CURRENT POWER AMPLIFIER 200 WATTS PER CHANNEL S/N 428023809 IN EXCELLENT COSMETIC AND OPERATING CONDITION. SHIPPING TO THE 48 STATES IS $85.

This Adcom GFA-555II Power Amplifier is a must-have for any audiophile looking for a powerful and versatile sound system. With 200 watts of power and two-channel RCA audio inputs, it is perfect for powering your home audio system. The amplifier also features banana speaker jacks for easy connection to your speakers. The sleek black design of this Adcom amplifier is sure to complement any home audio setup. Its excellent performance will provide you with clear and high-quality sound. Dont miss out on this amazing audio amplifier!

My Store FeedbackHAVE A QUESTION?If you have any questions about the products we offer please send us a message through the eBay messaging system and a representative will promptly get back to you with an answer.WHY BUY FROM US- Veteran owned company- Outstanding feedback rating- Professionally packaged shipments- All our products listed on eBay are in stock at our warehouse- Prompt serviceSHIPS 24 HOURS AFTER PAYMENT30 DAY RETURNSCOMPETITIVE PRICESProduct Details:Product DescriptionUp for Sale is a PARTS ADCOM GFA-555 II 2-CHANNEL POWER STEREO AMPLIFIER CUT POWER CORD unit In Parts condition. See photos for more details and item conditions. Items may exhibit minor cosmetic defects, including scuffs, marks, minor label residue from cleaning non-manufacturer labels off, or other minor defects. If you have any questions, please message us on our eBay store messaging system, where we offer help during 8:00 AM - 4:30 PM Mountain time. The item(s) you will be receiving may have an extra sticky note or label attached to them. Please see defects below.Technicians notes: PARTS/REPAIR, POWER CORD IS CUT, NO TESTING WAS DONE, SEE PHOTOS FOR CONDITION.All of our items are handled according to R2 Recycling standards. Mask and social distancing are required in all of our facilities. If this item is listed with a quantity or in a lot, please advise your item will be picked at random. All items are in similar condition as stated in the listing but may exhibit minor differences in cosmetic detail. UNLESS OTHERWISE STATED, POWER CABLES ARE NOT INCLUDED. Please consider properly recycling this item when done with use.Feedback is very important to usIf there is a problem with your eBay transaction please contact us before leaving neutral, negative or Item Not as Described feedback and we will do whatever it may take to make sure you are satisfied with your purchase.Just give us a chance to assist you so we can continue to offer outstanding products, prices and customer service!You can e-mail us directly through the eBay email system.About Us Shipping Policy Returns PolicyAs a Veteran-Owned Company, Integrity and Honor Are Our Top Priority3R Technology Solutions is owned and operated by Veterans who want to make a difference in our nation and the world.We assist with consulting for IT asset disposition and disposal to determine which of these processes you require.© Copyright 2021 3R Technology Solutions All rights reserved.

AUDIO and GAMING HQ ADCOM GFA-555 II RECEIVER - Cleaned & Tested - Fully FunctionalThis was benched tested. It had general service and cleaning. It is fully functional and is in excellent working condition.Includes only the ADCOM RECEIVER. No power-cord. No remote. If this is forwarded out of the USA by you, YOU are responsible for returning it to us if there is ANY issue. AUDIO and GAMING HQ: The Pacific Northwest Hello. We Are Audio and Gaming HQ. Audio and Gaming HQ is the leader in reselling new and used audio and gaming gear (and some other very cool stuff) on ebay. It is the goal of Audio and Gaming HQ to sell you the exact item you are hoping for at the condition you anticipate. Please read the description well before buying as some items are non-returnable. Shipping: We offer a wide range of shipping options to meet your order needs. We generally use Federal Express for shipping within the US and Ebay Global Shipping Program for shipping outside the United States. We have no control over the charges that ebay charges within the Global Shipping Program. We do not normally ship used stereo gear ship via USPS. Please check delivery times on our listing for the shipping lead time for this item. If you live outside of the U.S. but use a forwarding company to send items to you, you MUST contact me prior to offering on or buying one of my items. Failure to do so may result in an immediate cancellation and being added to my blocked buyers list. I am only responsible for confirmed delivery to a U.S. address. Returns: You may return the product directly to Audio and Gaming HQ after first obtaining a Return Material Authorization (RMA) number. An RMA number is obtained by sending us a message through eBay. Once we receive your request, our customer support will contact you with further questions. Though we generally do not accept returns for non-defective items, exceptions are made under certain circumstances. Defective products may be returned only after you speak with us via ebay. Package Includes: Only what is included in the photos and in the description. Nothing more. Nothing less. Business Hours: Monday - Friday 8 am - 4 pm PST. If you call and/or send us an email after 4 pm we will respond the next business day. We are closed on major holidays & will respond the next open business day.Damaged/Lost Items: In the event of damaged or lost items, you must contact our office ASAP to communicate damage or loss and we will initiate the claim process with the appropriate carrier (Fedex, USPS, etc.) We document serial numbers on all parts and equipment. If for any reason an item needs to be returned, we expect the item originally shipped to be returned. ** PLACING A BID OR BUY IT NOW ON OUR ITEMS IS ACKNOWLEDGEMENT OF OUR POLICIES, PLEASE READ BEFORE BIDDING OR BUYING ** Please like us on Facebook & Instagram. Our ebay user name is our user name on all social media. Contact Audio and Gaming HQ Customer Service: Since our start, Audio and Gaming HQ has been a customer-obsessed company that focuses on delivering a flawless experience to our buyers. We at Audio and Gaming HQ aim to make the e-commerce experience the absolute best for both us (the seller) and you (the buyer). Communication: We will always respond to any and all email and messages on ebay within an hour (during business hours). If you are a current buyer you will have access to both our office phone number and our private buyer exclusive Customer Service email address. Without You, There Is No Us.

ADCOM GFA-555II POWER AMPLIFIER Click images to enlarge Description           This amp is in excellent condition. It has just been checked out and it works as it should. It has also been well taken care of, and looks great. This amp is a beast and has power to spareYou will not be disappointed with its performance or price. Please see pictures for actual cosmetic condition. If you have any questions or want info on upcoming items for sale you can contact me at my ABOUT ME page, please click below for link. Disclaimer : Unless stated otherwise this is used equipment. It comes with no expressed or implied warranty of fitness or merchantability for any particular purpose. By purchasing or bidding the buyer agrees not to hold robtram liable for any monetary or personal injury arising out of the use of this item. I am not an expert of the many different makes and models of used equipment out there. Honesty is the best policy. Sometimes we can not check out every function, and unless stated we do not completely rebuild or align equipment. We may do some repairs to get it operating. If you have any question about a certain function please ask, otherwise the new owner will be responsible for fully checking them out. If you have any other questions about this item please contact me first before buying. PLEASE CLICK HERE FOR ABOUT ME PAGE     Payment Taxes will be applied if required by your State. Shipping Shipping can be calculated using the shipping calculator. We use the most cost effective and reliable. We can combine shipping on most tubes, and just charge you the actual total cost.Just ask us for combined invoice total. We try to keep the shipping cost down by offering First Class Mail and Parcel Select but please be aware that this can take up to 10 days to arrive, in most cases it doesnt but if you need it soon please pick shipping for Priority. If you prefer a different shipping method please ask and we will see what we can do. The 1 day domestic handling time is after payment clears. OVERSEAS BUYERS: Please contact us for Shipping/insurance for overseas all Duties and Tariff charges are the buyers responsibility . Since USPS has eliminated surface and parcel post airmail, small items may be combined and put in a flat rate box. We can not declare at a lower amount due to eBay and USPS regulations. contact me for the best shipping price. No shipping charges will be refunded. Terms of Sale All items are guaranteed to be in the condition stated unless sold AS-IS and stated so in the beginning of description. All items must be returned for refund, no exeptions. If you have any questions please email me. About Us Track Page Views WithAuctivas Counter

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisment is an exact reprint from 1991, it is printed on matte photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

This Adcom GFA-555 II Stereo Power Amplifier is a great addition to any home audio setup. With its powerful performance and sleek design, this amplifier is sure to impress. It is fully functional, and has been well maintained, making it an excellent buy for anyone looking for a high-quality amplifier. The amplifier has been tested and is in excellent working condition. It ships fast, so you can start enjoying your music as soon as possible.

--Items are listed in overall gently used condition --Please see photos for more detail on items --We try our best to check for defects or excessive wear but sometimes we fail to catch defects --With this in mind, we are selling item/items as is. All sales final. THANK YOU FOR SHOPPING GOODWILL AND SUPPORTING OUR MISSION TO SUPPORT PERSONS WITH DISABILITIES AND OTHER BARRIERS TO INDEPENDENCE IN ACHIEVING THEIR FULLEST POTENTIAL AS WORKERS AND AS MEMBERS OF THE BROADER COMMUNITY.

Welcome to Audio/Video Archives, the largest home of audio literature available on eBay! This Advertisment is an exact reprint from 1991, it is printed on matte photo paper and is in Excellent condition! The Picture is the picture of the actual item. It is a beautiful piece of Audio History. I have THOUSANDS more from every major brand of Audio from 1950 up to now. ---Satisfaction is GUARANTEED at AV Archives! Take a look at my feedback for satisfied customers! I have been open since 2007 and have sold THOUSANDS of Ads, Reviews, and Brochures to satisfied customers. ---I Ship Worldwide and combine shipping, each additional item is just $1 after the first is paid. ---Each Page is 8.5 by 11 unless otherwise noted in title. ---Single Page, Single Sided Ads, unless otherwise noted in the title. ---These Ads are perfect for framing and placed in your Audio Room. ---I have a HUGE Vinyl Record Store with Thousands of Collectable records, and MANY First Pressings/Audiophile LPs. Just click on my Vinyl Record Store link on the left under categories. Email me for any specific questions, You will hear back from me usually within 4 hours, THANK YOU! Greg Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

ADCOM GFA-555 II (Most famous sought after classic by the discriminating audiophile) BETTER THAN NEW INSIDE - BEAUTIFUL 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. This amp is the Nelson Pass redesign and upgrade from the 555. 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! If you would like to save a bundle on this amp use the blue lettering on the last picture BUT WAIT THERE’S MOREThis 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) I make the internals as close to new as possible, with the driver board being brand new with all new components. So that you will have a minimum of 25 years 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 upgraded with new Nichicon electrolytic capacitors 100 uf @160wvdc on the power output PCB’s. with added .1 uf 400 wvdc mica’s in parallel. The driver bias voltage was adjusted to 9.5 mv per side.The rail caps have been tested as follows:C1 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,000 uf / 260 ua.C2 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,400 uf / 100 ua.C3 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,300 uf / 160 ua.C4 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,300 uf / 210 ua.The ser.# of this unit is 336028379This unit draws .5 amps at 116 vac at idleThe DC offset is .5 mV on the left and .2 mV on the right (these will never be identical)( this is super low, almost 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. The Service manual & Owner manual will be included (reproduced from the original) 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 E address. Thank you for taking the time to read all my verbiage, for 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.

Very clean amp, but not perfect. The front panel is very nice. The sides have scratches. Still very presentable. It is working perfectly fine as is. It was recently checked and bench tested. It actually put out close to 300 Watts per channel when tested. Its rated at 200 Watts per channel. PLEASE LOOK AT ALL OF THE PICTURES PROVIDED AND ASK FOR MORE IF NEEDED. PLEASE ASK ALL QUESTIONS YOU MAY HAVE. THE MAJORITY OF MY ITEMS ARE SOLD AS IS DUE THEIR NATURE AND RARITY. SOLD AS IS. NO RETURNS. NO REFUNDS. Shipping quote is only for the Continental U.S.A Shipped with UPS or FedEx. USPS for Media, and smaller light stuff.

Note to interested buyers. I will be removing this listing on Oct 8th. I will be out of town for the month of October and I would not be able to ship this until I returned on the first of November. So Im just giving you all a heads up. I would really like to get this out before I leave if possible. For your consideration is this beautiful condition Adcom GFA-555 II power amp. This is vintage 90s power. Raw class AB design. Rated at 200 watts per channel at 8 oms. This is a legendary AMP. Do the research and you will see for yourself. For 600 bucks, you really cant find an equal for power to cost ratio. Rock solid performance and will hum along all day to help you blast the tunes away. For reference, here are a couple reviews. https://www.kenrockwell.com/audio/adcom/gfa-555-ii.htm (This was from 2011 so the pricing noted doesnt reflect current market conditions.) https://hometheaterreview.com/adcom-gfp-555-ii-preamp-and-gfa-545-ii-power-amp-reviewed/ OK. Now the fine print. I do not have the original box. Well, I have a box. Its not for this particular amp. Its for the 555 I had long ago and gave to a friend. Price as is. I dont need to sell her. Any questions, please dont hesitate to inquire within. Thank you for looking and good luck!

Only selling because Im moving and need to downsize my gear. Check out all pictures. Its in great shape.Due to age, AS IS!

Selling my GFP-555 and GFA-535 II. Both in very good condition cosmetically, both recently tested and functioning perfectly, and both sound great! Local pickup in Rehoboth Beach, DE or Chadds Ford, PA. Or will ship anywhere in the US for flat fee of $45.

Adcom GFA-555 II Stereo Power Amplifier. Ive owned this item for 25 years and cared for it like it was my child. This amplifier was used in a listening room that was used 10 times a year, at most. The amplifier works like its new. Buy with confidence and dont hesitate to ask me questions or request specific photographs.

Excellent condition very clean in and out, 1 owner.

ADCOM GFA-555 II (Most famous sought after classic by the discriminating audiophile) BETTER THAN NEW INSIDE - BEAUTIFUL 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. This amp is the Nelson Pass redesign and upgrade from the 555. 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! IF you want to save a bundle on this amp contact me using the blue letters on the last picture BUT WAIT THERE’S MOREThis 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) I make the internals as close to new as possible, with the driver board being brand new with all new components. So that you will have a minimum of 25 years 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 upgraded with new Nichicon electrolytic capacitors 100 uf @160wvdc on the power output PCB’s. with added .1 uf 400 wvdc mica’s in parallel. The driver bias voltage was adjusted to 9.5 mv per side.The rail caps have been tested as follows:C1 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,000 uf / 100 ua.C2 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,200 uf / 150 ua.C3 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,400 uf / 190 ua.C4 rated at 15,000 uf and allowable 9,000 ua leakage. Tested 17,900 uf / 250 ua.The ser.# of this unit is 417022903This unit draws .5 amps at 116 vac at idleThe DC offset is .1 mV on the left and .1 mV on the right this is super low, almost perfect. 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. The Service manual & Owner manual will be included (reproduced from the original) 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 E address. Thank you for taking the time to read all my verbiage, for 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.

Very good condition, see images. Works well. Weighs 35 pounds. Shipped safe and secure. I accept returns if not satisfied.

Adcom GFA-555 II Stereo Power Amplifier. Ive owned this item for 25 years and cared for it like it was my child. This amplifier was used in a listening room that was used 10 times a year, at most. The amplifier works like its new. Buy with confidence and dont hesitate to ask me questions or request specific photographs.