Welcome to The Speaker Port! Bring more power into your home with this ADCOM GTP-400 Tuner/Preamplifier and ADCOM GFA-535 II Power Amplifier combo! Units are serviced, cleaned, and appropriately adjusted for their new home.GTP-400 Features: Output Impedence: Main Out: 100?, Tape Out: 500?Frequency Response (+/- 0.5dB): High Level: 10Hz-100kHz, Phono:20Hz-50kHzInput Impedance: High Level:18,000?, Phono: 47,000?Input Sensitivity (Rated Output): High Level: 310mV, Phono: 3.3mVPower: 120VAC/50-60Hz GFA-535 II Features:Power Railing: 60 Watts continuous average power into 8 ohms at any frequency between 20Hz and 20kHzwith both channels driven at less than 0.04% THD. 100 Watts continuous average power into 4 ohms at any frequency between 20Hz and 20kHz with both channels driven at less than 0.04% THD.Frequency Response @ 1 Watt into 8 Ohms: 10Hz to 20KHz: 0.-0.25dBPower Bandwidth (-3dB): 1.7Hz to 100 kHzDynamic Headroom into 4 Ohms: 3dBGain: 27dBInput Impedance: 100,000 ohmsInput Sensitivity: 60 Watts into 8 ohms: 0,97rms. 1 Watt into 8 ohms:130mV rmsPower: 120VAC/50-60HzThe Speaker Port will provide a limited 30-day warranty for this item against component failure. It covers any natural failure of an internal item due to normal and proper use. This is a repair/replace warranty only; it does not allow for the return of the item(s) for a refund for any reason. Full details on our Warranty terms can be found by visiting our website and going into the Services section. There will be a link there to the Warranty Policy.____________________________________________________________________________________ General Information Who are we? Founded in 2016, The Speaker Port is a small, independently owned/operated business based in the suburbs of Chicago, IL. I started out in repairing/restoring vintage audio speakers and stereo systems but within the first year, took on both home and professional grade systems (PA systems, guitar amps, etc). I work on all components types (receivers, turntables, tape decks, power amps, etc.), makes and models. I hold a degree in Electrical Engineering but spent the better part of my 22 year professional career in Information Technology. Through it all was a deep love for music and music reproduction. Recently, I have established relationships with a number of music stores and studios servicing their own as well as 3rd party customer equipment. I now also offer my own line based on reproducing hard to find, vintage parts using 3D CAD design and printing technology. As we continue to growth, I look forward to being able to provide top shelf Customer services and well as products to go with it. Pricing If you have ever sold anything on eBay, you know that for everything you sell, eBay takes a very steep cut from you sale. EBay also takes money from the cost of shipping too. Annual costs associated with eBay’s make it even worse. On top of that, add on the percentage PayPal wants and as a result…you just lost 10-15% of you overall sale price. In order to sell products, you need to price competitively and fairly. In addition, we have families to feed so we cannot afford to lose money or break even. Please consider this when evaluating the price we set. Shipping All paid for items typically ship within 1 business day, however, we have a 5 day handling time in the event that an unforeseen issue comes up that prevents us from being able to ship immediately (such as weather related issues.) Any item we charge shipping costs for are fairly priced based. They take into consideration the materials necessary to secure/protect your item in transit. We use new boxes and packing when possible. The total cost of shipping must take into account our costs for these materials, the actual shipping cost charged by USPS or FedEx as well as the percentage eBay takes from us for shipping. We will never charge ridiculous, overprices shipping charges for any reason. As noted above, any listing we have that comes with ‘Free Shipping does not mean there is no cost associated with shipping the product. Most, if not all of our “Free Shipping” items are shipped USPS First Class (where we can predict the cost to any location domestically). On average, our cost to ship such items range from $3-$4. Please keep this in mind when evaluating the cost of our product to others. Unless otherwise specified in the listing, we do not insure any item in transit (beyond whatever the shipping provides as default…if any) nor do we add addition features such as signature requirement. If you want an item shipping with such additional features, it is your responsibility to ask for it and there will be additional costs associated with them. If an item offered to ship internationally, then it will be enabled in the listing via the eBay Global Shipping Program. Note: We do not have any control on what eBay GS charges for international shipping so please keep that in mind. eBay GS is a higher cost means of shipping but due to buyer fraud problems, we have had little choice but to go this route to eliminate claims of users not receiving items. Warranty and/or product guarantee Unless specifically statement in the list, there is no warranty or guarantee of any kid associated with the item you are buying. We have no way of knowing how much use it had before coming into our possession. Please consider this before buying. Any used/refurbished/restored item we sell is tested and verified to be in working condition before we list/sell the item. Any issues or problems will be clearly stated in the listing. This includes physical, electrical or operational condition. Regarding physical condition, we provide detailed pictures in our listing so please pay attention to them. We will not be describing every scratch/scuff/ding that may exist. Note: any statements made about things like sound or picture quality or value are completely the opinion of The Speaker Port and in no way represent a guarantee or statement of fact. For any NEW, 3rd party products that are still sealed in their original OEM packaging are assumed to be in perfect working condition. We will not open these packages to test them or evaluate their contents for any reason. The Speaker Port assumes no responsibility for the operational condition of such items and are offered “as-is”. Fraud Prevention Unfortunately, there are folks out there that try to commit fraud/steal products from us. As a result, The Speaker Port had to make some tough choices about how we do business on eBay. Once such measure is using the eBay Global Shipping service for international purchases. This eliminates buyer claims that they never received an item. They get away with this because of the lack of end-to-end tracking with cheaper shipping services. The Speaker Port has also had to resort to photo documenting and UV tagging (marking) products in various ways to prevent ‘bait and switch’ situations or from buyers who ‘harvest’ internal parts for their own use and claiming that the item does not work. We have zero tolerance for this. Misc Terms and Conditions Unless otherwise specified above, the following terms and conditions apply. If you have a question about one of our items that is not answered above or below, please reach out to us. Your bid means that you have read, understood and agree to all the items listed below. Many things can happen during the preparation of an item for shipment. In these extremely rare circumstance (where we have no spares to replace it with), we will offer you a comparable replacement or refund you your purchase (at your choice). We reserve the right to cancel any bids from users with zero (or negative feedback rating) at our discretion. Unless otherwise stated in the listing, all sales are final. If you have a question about the listing, we welcome you to send us a message about it, but please do so before bidding and/or winning an item. We have a 100% positive feedback rating for a reason. We do business in an honorable and respectable manner. It serves us no purpose to cheat or mislead any Customer. We are committed to your satisfaction…if you have ANY issue with something we have sold, please contact us directly first in order to resolve the matter. Your bid/purchase of this item means that you have read, understood and agree to all the terms and conditions detailed in this listing.

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US. no warranties no returns sold as is but works as designed before shipping. Little history about me: I start this business in 1990 using audiomart trade classified for buying selling and trading, it came in mail back then. I was on and listed in audio and sound bluebooks. I know many mod companies, techs and engineers with many manufactures. I have owned over 500 pieces of equipment and cables. My company also makes handmade cables. I do take partial trades depends on what it is and what buyer wants. good luck I have had quite a bit interest as I usually do, been on eBay since 1998.

Adcom GTP-400 Pre-Amp/Processor Amplifier - Cleaned & Serviced - Good Condition. This classic Adcom preamp was used for several years, then stored in the original box for over 20 years. The original owner passed it on to me, and I had it professionally cleaned and serviced. Built in phono preamp section. Works well! Headphone amp sounds great. No noise in volume, balance, bass, or treble knobs. I am getting some minor ground loop hum--no sure why. Only audible when not playing music. Did not test the tape loop inputs/outputs or the phono section. FM and AM tuner works great. Owners manual included. Classic analog hi-fi! Note: this auction is for the GTP-400; other Adcom equipment shown in the photos is not included.

Adcom GFA-535 II Power Amplifier and Adcom GTP-400 Preamp Both work great. There is one button misssing on GTP-400 & a few dings on that front corner as shown in pictures... but it is all functional. Will ship fast, very next business day shipping. Thank you.

Adcom GTP-400 Stereo Tuner/PreampAll inputs/outputs function. AM/FM untested (no antenna). Excellent cosmetic condition with few blemishes. CD input Phono inputTape 1 and 2 inputs AM tuner/Stereo FM tuner Frequency response: 10Hz to 100kHzTotal harmonic distortion: 0.009%Input sensitivity: 3.3mV (MM), 310mV (line)Signal to noise ratio: 80dB (MM), 95dB (line)Output: 2V (Pre out)Dimensions: 17in x 11-3/8in x 3in Weight: 11.5 lbNo pickupsAsk questions BEFORE you purchase

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US. no warranties no returns sold as is but works as designed before shipping. Little history about me: I start this business in 1990 using audiomart trade classified for buying selling and trading, it came in mail back then. I was on and listed in audio and sound bluebooks. I know many mod companies, techs and engineers with many manufactures. I have owned over 500 pieces of equipment and cables. My company also makes handmade cables. I do take partial trades depends on what it is and what buyer wants. good luck I have had quite a bit interest as I usually do, been on eBay since 1998.

ADCOM GTP-400 TUNER/PREAMP, Parts or Repair Excellent front panel  and very good physical condition. Unit does not power on. The fuse is not blown, but when I opened it up, you can see 2 or 3 parts that must have burned out and were removed on the motherboard. See the picture. The rest of the circuitry looks fine. You will need to download the schematic and parts list in the owner's manual on the web and replace these parts. Or, it is a Treasure trove of Adcom Parts worth many times the price. Sold As-Is.

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US. no warranties no returns sold as is but works as designed before shipping.

Powers on. Digital tuner works. READ ENTIRE DESCRIPTION What we know about the item is written on the SPEC SHEET. Chargers, Power Cords and Accessories DO NOT come with items unless specifically stated in the description. We sell EVERYTHING AS-IS. There are no returns for our items. These are used items that go through basic testing. Read everything to save everyone time and money. We don’t work SUNDAYS so questions will go unanswered. We are a recycling company that gives new life to electronics. We are not a repair shop. Please refer to details and photographs for complete description. Pre-owned items may contain signs of use, such as scratches, dings or small cracks. There’s quite a few entitled people on eBay that think this is Amazon - so we just don’t worry about feedback since Karen’s want to weaponize it. If you’re cool, we’ll work it out with you. If you’re not, you’ll be blocked and we don’t care what feedback you leave. We don’t answer messages if you can just find the answer on Google yourself. We don’t know how much shipping will be. We WILL combine shipping for items won within 24 hours. You can get really good deals here if you do some research. Thank you for checking out our listing, best wishes on your bids!

Good working condition. See my other auctions for matching amp

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US.

Powers on. Digital tuner works. READ ENTIRE DESCRIPTION What we know about the item is written on the SPEC SHEET. Chargers, Power Cords and Accessories DO NOT come with items unless specifically stated in the description. We sell EVERYTHING AS-IS. There are no returns for our items. These are used items that go through basic testing. Read everything to save everyone time and money. We don’t work SUNDAYS so questions will go unanswered. We are a recycling company that gives new life to electronics. We are not a repair shop. Please refer to details and photographs for complete description. Pre-owned items may contain signs of use, such as scratches, dings or small cracks. There’s quite a few entitled people on eBay that think this is Amazon - so we just don’t worry about feedback since Karen’s want to weaponize it. If you’re cool, we’ll work it out with you. If you’re not, you’ll be blocked and we don’t care what feedback you leave. We don’t answer messages if you can just find the answer on Google yourself. We don’t know how much shipping will be. We WILL combine shipping for items won within 24 hours. You can get really good deals here if you do some research. Thank you for checking out our listing, best wishes on your bids!

This Adcom GFA-555II power amplifier is a great addition to any audio system. With 200 watts of power, it delivers clear and powerful sound. The amplifier features two-channel RCA audio inputs and banana speaker jacks for audio outputs. It also includes a radio tuner, making it a versatile choice for any home audio setup. The sleek black design and ADCOM brand make it a stylish and reliable choice. Whether youre a music enthusiast or an audiophile, this power amplifier is sure to impress.

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US.

Nice Adcom preamplifier tuner unit. Works and sounds great! Tested FM tuner, CD and Phono inputs. Because of age and weight, no returns.

Adcom GTP-400 preamplifier in excellent condition with original factory packaging and box and Manual. Tested and fully functional. Shipping is to USA only unless purchased through eBay international shipping program Adcom GTP-400 Stereo Tuner Preamplifier (1988-89) add a review (2 reviews) Adcom GTP-400 Specifications Frequency response: 10Hz to 100kHz Total harmonic distortion: 0.009% Input sensitivity: 3.3mV (MM), 310mV (line) Signal to noise ratio: 80dB (MM), 95dB (line) Output: 2V (Pre out) Dimensions: 432 x 289 x 76mm Weight: 5.2kg Year: 1996

Works but I have managed to lose one of the buttons on the front. If you have a extra knob or know where you can get one this is a great deal

Adcom GTP-400 Preamp Tuner Tested Works. Used. Standard ship. Stereo Tuner Preamplifier (1988-89) - Controls and switches cleaned. What I like most about this preamp is that you can use it as a dedicated headphone amp with a main amp. Yet as a preamp for one of your Adcom amplifiers it is just as good. Technicians arebig fans of the sound you get from Adcom preamps for the price. Tested FM and AM - both work. FM< picks up stations and locks in on stereo. Phono also sounds good. Some marks and or scratches yet presents well. Frequency response: 10Hz to 100kHzTotal harmonic distortion: 0.009%Input sensitivity: 3.3mV (MM), 310mV (line)Signal to noise ratio: 80dB (MM), 95dB (line)Output: 2V (Pre out)Dimensions: 432 x 289 x 76mmWeight: 5.2kg Almost 15 pounds LBS - Heavy Year: 1996Carefully packaged, insured and includes tracking. Youll need your own FM and AM antenna. Thank you

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US.

Adcom GTP-400 preamplifier in excellent condition with original factory packaging and box and Manual. Tested and fully functional. Shipping is to USA only unless purchased through eBay international shipping program Adcom GTP-400 Stereo Tuner Preamplifier (1988-89) add a review (2 reviews) Adcom GTP-400 Specifications Frequency response: 10Hz to 100kHz Total harmonic distortion: 0.009% Input sensitivity: 3.3mV (MM), 310mV (line) Signal to noise ratio: 80dB (MM), 95dB (line) Output: 2V (Pre out) Dimensions: 432 x 289 x 76mm Weight: 5.2kg Year: 1996

I have for sale used in good condition modified - mods inspired and taught to me by Ron Wellborne of Welbourne Labs,adcom gtp 400 preamp, see pics, has power supply mods and out signal mods. Professionally clean, calibrated and aligned. Please ask all questions before buying. No returns sold as is works well. Shipping price incudes shipping and the packing materials needed to ship in the US.

Adcom GTP-400 preamplifier in excellent condition with original factory packaging and box and Manual. Tested and fully functional. Shipping is to USA only unless purchased through eBay international shipping program Adcom GTP-400 Stereo Tuner Preamplifier (1988-89) add a review (2 reviews) Adcom GTP-400 Specifications Frequency response: 10Hz to 100kHz Total harmonic distortion: 0.009% Input sensitivity: 3.3mV (MM), 310mV (line) Signal to noise ratio: 80dB (MM), 95dB (line) Output: 2V (Pre out) Dimensions: 432 x 289 x 76mm Weight: 5.2kg Year: 1996

ADCOM GTP 400 Tuner/Preamplifier *Remote Not Included* Works Great! FreeShipping Item Description ADCOM GTP 400 Tuner/Preamplifier *Remote Not Included* Works Great! FreeShipping You’ll receive the exact item shown in the photos. Cosmetic Description: May have a few dings/scuffs. Photos do a nice job of showing overall condition. Remote Not Included! Tested Working Terms of Sale If you have any questions about this listing please contact us and we will be in contact promptly. Our general business hours are Monday through Friday 7:30 AM - 4:00 PM CST. Return Policy The Waste Commission of Scott County will disclose all cosmetic or functional defects prior to the sale of any product. All products will be packaged appropriately to prevent damage during shipment. The Waste Commission of Scott County will refund the full purchase amount of any product which does not meet the purchaser’s expectations or arrives with defects unknown prior to sale and shipment upon return of the product. The full refund will be applicable for 30 days after receipt by the purchaser. Shipping & Fees Standard Shipping to the 48 contiguous states excluding items shipped to APO/FPO, PO Box and will be shipped by next business day after payment is received. Local sales tax applies in Iowa. Features {{itemfeatures}} Details {{itemdetails}} Fast and Free Shipping Youre already purchasing the item. Why pay additional for shipping, especially slow shipping? We get your order shipped out within 2-business day and delivered to your doorstep as quickly as possible. Competitive Pricing With our dynamic pricing model, our prices are always competitive. Our prices are some of the lowest that you will find on the internet. Rest assured that youre getting a good deal when purchasing with us. 30-day Money Back Guarantee We are committed to making sure that you leave this transaction satisfied. If youre unhappy with the product for any reason, you may return it back for your money-back or a replacement within 30 days. No questions asked!