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Adcom GFA-545 II High Current Stereo Power Amplifier 100/150 Watts rms/Channel

End: 04.02. 2024 02:44:02 on Sunday
  • Condition: Used
  • Price: 259.99 USD FESTPREIS
  • Status: 30T 20:7:39
  • Item number: 355345493796
  • Seller: (|%)
  • Seller information:
  • Item location: Sarasota,FL,USA USA
  • Ships to:
  • Shipping: USD
  • on EBAY
  • Description

    Adcom GFA-545 II High Current Stereo Power Amplifier 100/150 Watts rms/Channel OVERVIEW: About: This Adcom GFA-545 II power amplifier is a high-quality stereo amplifier that delivers 100/150 watts rms per channel. It's perfect for home audio enthusiasts who want to enjoy their music with crystal clear sound. The amplifier has 2 channels and 2 inputs, making it easy to connect your audio devices. The Adcom GFA-545 II amplifier has analog features, raw cable speaker jacks, and RCA audio inputs. It comes in classic black color and is made in the United States. This power amplifier is a must-have for anyone looking for a great audio experience. Condition - Pre-Owned  (Very Good) - Item is in Very Good pre-owned condition with some minor cosmetic damage (as seen in photos). -Please consider photos part of description. -Item has been tested and fully functions as intended. -Included items are seen in photos. -All Offers Considered-  Ships Same Day!

Adcom GFA-545 II Channel Power Amplifier

End: 27.01. 2024 07:59:02 on Saturday
  • Condition: Used
  • Price: 244.54 EUR Auktion
  • Status: sold
  • Item number: 176193820624
  • Bids: 7
  • Seller: rrjb32 (542|100.0%)
  • Seller information: Commercial (with base shop)
  • Item location: Parkville, Maryland USA
  • Ships to: US
  • Shipping: 45,0 EUR
  • on EBAY
  • Description

    This Adcom GFA-545-II amplifier was a trade in. It has been fully bench tested and ran for over 8 hours with no issues. Ready to go home to the next owner. There are a few light scratches on the top left rear but other than that its in great shape and works perfect. See the pics. if you want more pics just ask. NO INTERNATIONAL SHIPPING !!!!!!!!!

Adcom GFA-545 II Owners Manual

End: 22.01. 2024 15:17:14 on Monday
  • Condition: Gut
  • Price: 18.65 EUR FESTPREIS
  • Status: sold
  • Item number: 375190981907
  • Seller: upscale.tom (2762|100.0%)
  • Seller information: non commercial
  • Item location: Berwyn, Illinois USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    We are closing out all of our owners manuals, with FREE US SHIPPING to the contiguous 48, or you are welcome to examine it here at: Upscale Audio Exchange3225 S. Harlem Ave.Berwyn, IL 60402 Established in 1992, we feature fine components from audio-technica, Dual, Vincent Audio, Music Hall, Record Doctor, Nitty Gritty and more, as well as our refurbished gear and the cleanest used vinyl around (classical music our specialty).

Adcom GFA-545 II High Current Stereo Power Amplifier

End: 17.01. 2024 14:23:44 on Wednesday
  • Condition: Used
  • Price: 300.0 USD FESTPREIS
  • Status: 30T 20:11:55
  • Item number: 395070102321
  • Seller: (|%)
  • Seller information:
  • Item location: Harrison,USA USA
  • Ships to:
  • Shipping: 65,0 USD
  • on EBAY
  • Description

    This high current stereo power amplifier from Adcom is a must-have for any audio enthusiast. With its power and precision, you can experience the full range of your music like never before. Built with quality materials and expert craftsmanship, this amplifier is guaranteed to impress. The Adcom GFA-545 II is perfect for any home audio system, and its brand name ensures that you're getting a reliable and trustworthy product. Its powerful performance and sleek design make it a standout piece in any setup. Invest in the Adcom GFA-545 II and enhance your listening experience today.

ADCOM GFA-545 ii STEREO POWER AMPLIFIER - SERVICED - CLEANED - TESTED

End: 16.01. 2024 04:20:40 on Tuesday
  • Condition: Used
  • Price: 429.95 USD FESTPREIS
  • Status: 30T 23:38:16
  • Item number: 335167634794
  • Seller: (|%)
  • Seller information:
  • Item location: Levittown,PA,USA USA
  • Ships to:
  • Shipping: 0,0 USD
  • on EBAY
  • Description

    ADCOM GFA-545 ii STEREO POWER AMPLIFIER - SERVICED - CLEANED - TESTED. THIS STEREO AMPLIFIER WORK GREAT AND IS IN EXCELLENT CONDITION INSIDE AND OUT, NEAR MINT. 100 WPC. WE REPLACED ALL DEFECTIVE CAPACITORS AND ANY OTHER DEFECTIVE COMPONENTS. REPAIRED ALL POOR SOLDER CONNECTIONS. ( WE HAVE BEEN IN BUSINESS FOR OVER 60 YEARS REPAIRING VINTAGE AUDIO EQUIPMENT.) IF YOU HAVE ANY CONCERNS, PLEASE CONTACT US PRIOR TO YOUR PURCHASE.

Adcom GFA-545 II High Current Stereo Power Amplifier

End: 15.01. 2024 23:58:27 on Monday
  • Condition: Used
  • Price: 183.2 EUR Auktion
  • Status: unsold
  • Item number: 276283104288
  • Bids: 0
  • Seller: misscaro1975-8 (387|97.6%)
  • Seller information: non commercial
  • Item location: San Jose, California USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Adcom GFA-545 II High Current Stereo Power Amplifier.WORKING GREAT SOUND.SpecificationsPower output: 100 watts per channel into 8? (stereo)Frequency response: 10Hz to 20kHzTotal harmonic distortion: 0.04%Damping factor: 400Gain: 27 dBInput sensitivity: 1.25VSignal to noise ratio: 110dBSemiconductors: 38 x transistors, 2 x zener diodes, 12 x diodes, 2 x IC, 2 x diode bridgesDimensions: 138 x 432 x 310mmWeight: 11kg

Adcom GFA-545 II Stereo Power Amplifier Works Great Condition

End: 25.12. 2023 16:26:02 on Monday
  • Condition: Used
  • Price: 199.99 USD Auktion
  • Status: 6T 23:4:31
  • Item number: 256346586880
  • Bids: 0
  • Seller: (|%)
  • Seller information:
  • Item location: Humble,TX,USA USA
  • Ships to:
  • Shipping: USD
  • on EBAY
  • Description

    Works great condition

Adcom GFA-545 II Stereo Power Amplifier Works Great Condition

End: 18.12. 2023 12:15:56 on Monday
  • Condition: Used
  • Price: 199.99 USD Auktion
  • Status: 6T 18:38:56
  • Item number: 256338277023
  • Bids: 0
  • Seller: (|%)
  • Seller information:
  • Item location: Humble,TX,USA USA
  • Ships to:
  • Shipping: USD
  • on EBAY
  • Description

    Works great condition

Adcom GFA-545 II Stereo Power Amplifier EXCELLENT!

End: 10.12. 2023 20:14:39 on Sunday
  • Condition: Used
  • Price: 184.22 EUR Auktion
  • Status: unsold
  • Item number: 256328841008
  • Bids: 0
  • Seller: wanfwan (1323|98.7%)
  • Seller information: non commercial
  • Item location: Humble, Texas USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Works great condition

Adcom GFA-545 II High Current Stereo Power Amplifier 100/150 Watts W/ Box Manual

End: 25.11. 2023 23:23:05 on Saturday
  • Condition: Used
  • Price: 299.99 USD FESTPREIS
  • Status: 30T 18:45:54
  • Item number: 196050132432
  • Seller: (|%)
  • Seller information:
  • Item location: Seattle,WA,USA USA
  • Ships to:
  • Shipping: 50,0 USD
  • on EBAY
  • Description

    The amplifier is in excellent condition. Tested and works perfectly. Comes with the original box, manuals, and packaging. Power output: 100 watts per channel into 8? (stereo) Frequency response: 10Hz to 20kHz Total harmonic distortion: 0.04% Damping factor: 400 Gain: 27 dB Input sensitivity: 1.25V Signal to noise ratio: 110dB Semiconductors: 38 x transistors, 2 x zener diodes, 12 x diodes, 2 x IC, 2 x diode bridges Dimensions: 138 x 432 x 310mm Weight: 11kg

Adcom GFA-545 II High Current Stereo Power Amplifier , 100/150 Watts rms/Channel

End: 12.11. 2023 19:55:16 on Sunday
  • Condition: Used
  • Price: 252.53 EUR FESTPREIS
  • Status: sold
  • Item number: 204514443221
  • Seller: vintage-spinage (4690|99.4%)
  • Seller information: Commercial (with base shop)
  • Item location: Roanoke, Virginia USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Tested and sounding great

Adcom GFA-545 II High Current Stereo Power Amplifier , 100/150 Watts rms/Channel

End: 04.11. 2023 16:15:28 on Saturday
  • Condition: Used
  • Price: 199.99 USD FESTPREIS
  • Status: 6T 20:18:55
  • Item number: 364551412771
  • Bids: 0
  • Seller: (|%)
  • Seller information:
  • Item location: Upper Marlboro,MD,USA USA
  • Ships to:
  • Shipping: USD
  • on EBAY
  • Description

    ADCOM GFA-545 11 High Current Stereo Power Amplifier, 100/150 Watts rms/ Channel Tested Used is in comestic condition Look at the pictures for detail Thanks for Looking.

Adcom GFA-545 II High Current Stereo Power Amplifier , 100/150 Watts rms/Channel

End: 30.10. 2023 15:49:08 on Monday
  • Condition: Used
  • Price: 141.69 EUR FESTPREIS
  • Status: 3T 15:43:30
  • Item number: 325793531604
  • Seller: jkrmusic123 (101|100.0%)
  • Seller information: non commercial
  • Item location: Napa, California USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Adcom GFA-545 II High Current Stereo Power Amplifier , 100/150 Watts rms/Channel. Condition is Used. Shipped with USPS Ground Advantage.

ADCOM GFA-545II Stereo Power Amplifier

End: 08.10. 2023 21:25:52 on Sunday
  • Condition: Used
  • Price: 205.47 EUR Auktion
  • Status: sold
  • Item number: 325835765622
  • Bids: 26
  • Seller: thriftonic (88263|98.9%)
  • Seller information: Commercial (with base shop)
  • Item location: San Jose, California USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    Product Specifications: ADCOM GFA-545II Stereo Power AmplifierAccessories: Not IncludedDescription: Unit has been tested to verify functionality. If not stated you will only receive what is seen in the photos.Appearance: Unit is in very good pre-owned/used condition with minor cosmetic damage. ---Please feel free to contact us if you have any additional questions about the product. If choosing Local Pickup: Local Pickup Policy All items must be picked up within 14 days of purchase.Any item not picked up within 14 days of purchase will be cancelled, refunded and relisted without notification.All items picked up must be picked up by the individual named in the profile.No 3rd party pickups without prior approval.Identification is required to be shown when picking up all ordersAll pick-up orders must be paid for prior to pick-up. Payments will not be accepted on-site - no exceptions.No Walk-Ins. If you have not scheduled and received a confirmation of your pick up time, we will not be able to accommodate your pick up.Local pickup must be scheduled prior to arrival by contacting Customer Service.The pickup address for all items is 1080 N. 7th Street, San Jose, CA 95112Local pickup is available by appointment only and must be picked up within 14 days.

Adcom GFA-545II 2-Ch 120-Watt Stereo Power Amp

End: 03.10. 2023 18:04:25 on Tuesday
  • Condition: Used
  • Price: 279.24 EUR FESTPREIS
  • Status: sold
  • Item number: 295945613055
  • Seller: pawnamerica (196556|99.7%)
  • Seller information: Commercial (with base shop)
  • Item location: Duluth, Minnesota USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    PAWN AMERICA KEY TECHNICAL SPECIFICATIONS :Brand: Adcom Type: Power Amp Model: GFA-545II 2-Ch 120-Watt Stereo Power Amp Number of Channels: 2Color: BlackMPN: GFA-545II Features : This robust amplifier is capable of operating into very low impedance or difficult speaker loads due in part to its high current design. It is based on a triple Darlington configuration and uses no protection or current limiting circuitry other than the fuses used in the DC power supply voltage rails.Description: Two-channel, solid-state amplifier. Output power: 60W into 8 ohms (17.8dBW). Input sensitivity: 970mV RMS. Input impedance: 100k ohms. Frequency response: 10Hz–20kHz, –0.25dB. S/N ratio: 110dB. Power consumption: 300W. Dimensions: 3 H by 17 W by 11.25 D. Whats Included : Adcom GFA-545II 2-Ch 120-Watt Stereo Power Amp Whats Not Included : Anything not shown in photographs. Condition : This product was previously used. We tested this to the best of our ability, and it worked well during our testing phase. The condition is good due to imperfections such as scratches from prior use. Please see the pictures for further details. Reference: 23721040255 Note: Overnight Shipping order cut off time is 1PM CST. HOME | LOCATIONS | SERVICES | PRODUCTS | CAREERS | CONTACT US

ADCOM Model GFA-545 II 2-Channel Stereo Power Solid State Amplifier

End: 13.09. 2023 22:39:44 on Wednesday
  • Condition: Used
  • Price: 190.87 EUR Auktion
  • Status: sold
  • Item number: 355021525380
  • Bids: 17
  • Seller: goodwill_industries_of_san_francisco (298048|98.6%)
  • Seller information: Commercial (with base shop)
  • Item location: South San Francisco, California USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Condition Unit has been Tested and Working Unit shows some signs of use, wear and scuffs. Additional Detail Power Cord Included No Power Adapter Included No other accessory included (We ONLY include what is in the pictures). Were NOT offering local pickup. All shippable items will be shipped Please contact us via the eBay message system if you have any questions. _____________________________________________________________________________________________________ Thank you for shopping with SF Goodwill! Your generous purchase from Goodwill makes a big difference for local people struggling with unemployment. Your purchase funds job programs and services for people overcoming challenges like homelessness, former incarceration, lack of job skills and limited education. We create second chances through training and the dignity of work. Payment: ??????Payments are due within 7 days from auction end date. Shipping: ??????We do not ship to PO Boxes or Military Addresses (ie: APO/FPO/DPO/etc) Combined Shipping: Yes, We Offer Combined Shipping Discounts! Item with the highest shipping price will be billed at full price shipping, additional items: 75% off each shipping cost Most orders qualify for an automatic combined shipping discount, simply check out and pay! Some items cannot be combined in shipping (fragile, oversize or heavy items) We cannot apply a combined shipping discount after payment has been made Please send us a direct message if you need help, or require a custom combined shipping invoice. Local Pickup: Were NOT offering local pickup. All shippable items will be shipped. Order Issues and Questions: Problems with your order? Were here to help! Please contact us via the eBay message system if you have any issues with your order. Due to our high volume of sales, please allow 24-48 hours for us to respond to your messages. ______________________________________________________________________________________________________ Our Mission: Each year, nonprofit Goodwill of San Francisco, San Mateo and Marin breaks the cycle of poverty for thousands of local people through our transformative free training and work placement programs. Goodwill serves anyone who comes through our doors with a willingness to work. Job Creation: From skills training to job coaching that leads to employment, we identify and develop job-readiness skills on both a personal and professional level, plus offer a variety of employment support services. Employment at Goodwill: Our 21 retail stores, 25 attended donation centers and 2 warehouses employ more than 600 people and provide training and employment opportunities for individuals seeking to learn and build work skills that lead to career pathways. Employment with Top Bay Area Companies: Our experienced employment coaches connect work-ready job seekers with open positions at a range of companies throughout San Francisco, San Mateo and Marin counties. Impacts: Last year, Goodwill of San Francisco, San Mateo and Marin placed our participants in 636 jobs and transitional employment opportunities. In addition, education, job training, and employment services were provided to 3,200 people in our three-county region, and 10,300 visits were made to our Comprehensive Access Point Job Center.

ADCOM GFA-545 II Stereo Power Amplifier AS IS

End: 09.09. 2023 03:05:44 on Saturday
  • Condition: For parts or not working
  • Price: 86.51 EUR FESTPREIS
  • Status: sold
  • Item number: 276036369415
  • Seller: krystynopil (1622|100.0%)
  • Seller information: non commercial
  • Item location: Webster, New York USA
  • Ships to: US
  • Shipping: 35,0 EUR
  • on EBAY
  • Description

    ADCOM GFA-545 II Stereo Power Amplifier, for parts/repair. Wont power upS&H $35 in continental USA

Adcom GFA-545 II High Current Stereo Power Amplifier Great Sound !!!!

End: 07.09. 2023 20:38:51 on Thursday
  • Condition: Used
  • Price: 227.9 EUR FESTPREIS
  • Status: sold
  • Item number: 134652332276
  • Seller: jhlny2002 (4056|100.0%)
  • Seller information: Commercial (with base shop)
  • Item location: Voorhees, New Jersey USA
  • Ships to: US
  • Shipping: 116,01 EUR
  • on EBAY
  • Description

    ADCOMAdcom GFA-545 II High Current Stereo Power AmplifierIn excellent working and cosmetic condition. Great sound !!

ADCOM GFA-545 II Power Amplifier ! Very nice !! Old School

End: 07.09. 2023 15:07:59 on Thursday
  • Condition: Used
  • Price: 304.94 EUR FESTPREIS
  • Status: sold
  • Item number: 256089532777
  • Seller: soundideasfl (2459|99.1%)
  • Seller information: Commercial (with base shop)
  • Item location: Gainesville, Florida USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    ADCOM GFA-545 II Power Amplifier ! Very nice !! Old School Used, Tested, Working. Nice condition; ..clean with some marks/flaws on the top (SEE PICTURES) 100 watts RMS minimum per channel into 8 ohms or 150 watts RMS into 4 ohms at less than .04% THD Frequency response: 1.7 Hz ~ 100 kHz +0/-3dB S/N ratio: >110dB (A-weighted) Dynamic headroom: 2.1dB Damping factor: >400. Gain: 27db Input Impedance: 100,000 ohms

Adcom GFA-545II & GFP-710 Power Amp Pre-amp -Remote - Works Geat

End: 31.07. 2023 01:36:42 on Monday
  • Condition: Used
  • Price: 546.85 EUR FESTPREIS
  • Status: unsold
  • Item number: 304986743949
  • Seller: abraxasaudio (3893|100.0%)
  • Seller information: non commercial
  • Item location: Fortville, Indiana USA
  • Ships to: US
  • Shipping: 156,77 EUR
  • on EBAY
  • Description

    Adcom Power Amp & Preamp Adcom GFA-545IIAdcom GFP-710 w/remote My original main listening system.Had to downsize.So were looking for a nice home. Everything works. No issues. You know what these are, so I wontelaborate. Sweet, sweet sounds.Nelson Pass DNA in this power amp.Drives anything and never seems to stress.Deep deep bass.Superior depth.Always sounds natural.Drives 4 ohms without a sweat. Make me a kind offer to find a new home. Shipping:HEAVYAbout 42 lbs. UPS Ground.Ships in a double wall box.

ADCOM GFA-545 II Stereo Power Amplifier PARTS/REPAIR

End: 18.07. 2023 02:32:16 on Tuesday
  • Condition: For parts or not working
  • Price: 102.65 EUR FESTPREIS
  • Status: sold
  • Item number: 256145038971
  • Seller: mco-collectibles (6562|99.1%)
  • Seller information: Commercial (with base shop)
  • Item location: Denver, Colorado USA
  • Ships to: US
  • Shipping: 83,23 EUR
  • on EBAY
  • Description

    No audio output. Item is being sold FOR PARTS! We will not get back to questions regarding what is wrong with it, as we are not a repair shop and do not fix these units. Photos will be of the exact unit you receive.

ADCOM GFA-545 II Stereo Power Amplifier for Parts/Repair

End: 25.06. 2023 03:43:13 on Sunday
  • Condition: For parts or not working
  • Price: 122.77 EUR Auktion
  • Status: sold
  • Item number: 334916120927
  • Bids: 26
  • Seller: seattlegoodwill (305395|98.8%)
  • Seller information: Commercial (with base shop)
  • Item location: Seattle, Washington USA
  • Ships to: US
  • Shipping: 112,31 EUR
  • on EBAY
  • Description

    DESCRIPTIONFor parts or not workingFor parts or repair. Unit powers on but no further testing was done.17x11x6 17.6lbs approxBrand:ADCOMType:Power AmplifierModel:ADCOM GFA-545 ***Disclaimer*** All items were donated to Evergreen Goodwill of Northwest Washington with no history or provenance. The auction is for all items pictured. Items may need servicing and/or benefit from a cleaning upon arrival. Please see photos for additional details and feel free to ask questions. PAYMENTSPlease note that your entire order will be canceled by eBay if the oldest item exceeds 7 days without payment. Once an order is canceled, we are unable to re-invoice and the item will be relisted. For a combined shipping invoice, please send us one request within 5 days of winning the first item to avoid cancelation of your entire order. Once a combined invoice has been sent, we are unable to add additional items to the invoice. SHIPPING Local pickup is not available at this time. We offer combined shipping as long as items will ship safely together. Auctions must end within 5 days of each other to be eligible for combined shipping. Please hold off on payment until all auctions have ended then proceed to checkout. Please do not pay for any items individually if you wish to have them combined - they must be paid at the same time. Items listed for flat-rate shipping are not eligible for combined shipping. PO Box addresses will require USPS shipments as FedEx Ground will not deliver. If FedEx is selected we may need to invoice for additional shipping costs. INTERNATIONAL BIDDERS We ship to Canada, Europe, United Kingdom, Japan, and New Zealand.As of 9/3/2021 Australia has suspended international mail services using Priority Mail International, Express and First-Class USPS shipping. Until these restrictions are lifted, we are unable to ship to Australia.We do not ship to the following locations: Africa, South America, Central America, Mexico and Asia (except Japan). Please see the comprehensive list of countries we do not ship to under the Shipping and payments tab. Please note that we cannot accept payment from Singapore due to current PayPal regulations regarding foreign charity donations. APO addresses will require USPS shipments as FedEx ground will not deliver. If FedEx is selected we may need to invoice for additional shipping costs. Import duties, taxes and charges are not included in the item price or shipping charge. Those additional fees are the buyers responsibility. We do not mark merchandise values below the sale price or mark items as gifts as US and International government regulations prohibit such behavior.

ADCOM GFA-545 II Stereo Power Amplifier

End: 21.06. 2023 21:12:27 on Wednesday
  • Condition: Used
  • Price: 205.07 EUR FESTPREIS
  • Status: sold
  • Item number: 295765681217
  • Seller: resort5 (913|100.0%)
  • Seller information: non commercial
  • Item location: Roseville, California USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Adcom GFA-545II Stereo Power Amp in Excellent working condition.Specifications:Power output: 100 watts per channel into 8? (stereo)Frequency response: 10Hz to 20kHzTotal harmonic distortion: 0.04%Damping factor: 400Gain: 27 dBInput sensitivity: 1.25VSignal to noise ratio: 110dBSemiconductors: 38 x transistors, 2 x zener diodes, 12 x diodes, 2 x IC, 2 x diode bridgesDimensions: 138 x 432 x 310mm

ADCOM GFA-545 II, 100WPC Vintage 2-Channel Stereo Amplifier, Pristine Condition

End: 21.06. 2023 17:45:35 on Wednesday
  • Condition: Used
  • Price: 227.44 EUR Auktion
  • Status: unsold
  • Item number: 134615521526
  • Bids: 0
  • Seller: pickleshaveruinedmylife (620|100.0%)
  • Seller information: non commercial
  • Item location: Seattle, Washington USA
  • Ships to: US
  • Shipping: 125,3 EUR
  • on EBAY
  • Description

    If youve clicked this far, you likely know what you are looking at- the legendary ADCOM GFA-545 II amplifier designed by the one and only Nelson Pass. This amp is in excellent working order and cosmetically nearly perfect. Adult owned as part of a 2-channel turntable setup, and never abused. Comes with original info brochure. One of the all-time audiophile classics. The Adcom GFA-545 II (GFA stood for GREAT F****G Amp) designed by the legendary Nelson Pass (First Watt and Pass Labs) this was the best bargain audio in the world at the time. Specs Power Output: 100W into 8? (stereo) Frequency Response: 10Hz to 20kHz Distortion: 0.04% Damping Factor: 400 Speaker Impedance: Input Sensitivity: 1.25V Signal to Noise Ratio: 110dB Dimensions: 138 x 432 x 310 mm Weight: 11 kg Manual can be downloaded here: https://www.hifiengine.com/manual_library/adcom/gfa-545.shtml