McIntosh C22 Vintage Tube Preamplifier, Restored and Highly Collectible

Description: McIntosh C22 Vintage Tube Preamplifier, Restored and Highly Collectible McIntosh C22 Vintage Tube Preamplifier, Restored and Highly Collectible This is the Holy Grail of preamps from McIntosh. Likely the most collectible vintage piece from McIntosh, and their top tube preamp.An all-tube unit providing that warm and engaging vintage sound that so many are after. In very nice cosmetic condition with light signs of use as expected from a well cared for piece from this era.SkyFi Restoration Notes:• Replaced grommets on tube holder.• Rebuilt entire power supply with reproduction multi-section caps, NOS carbon comp resistors, and other modern components.• Cleaned and tested all controls.• Verified signal path restoration by previous repair shop - PASS.• Unit appears to have been maintained by Analogique in the past.Cosmetic Notes:• One convenience outlet has minor damage.• Number etched into the bottom of the faceplate, however not at all visible unless unit is turned completely upside-down.• Slight silkscreen lifting around source selection text.• "Volume" text slightly deformed.Functionality Notes:• There is a tiny bit of source bleed when the volume control is at its minimum.• Even after thorough cleaning, the volume control still has a bit of scratchiness in the lower range. Also little pops can be heard when manipulating the tone controls.A perfectly matching vintage McIntosh wood cabinet is available for an additional $549 including shipping. Just select the option at the top of this eBay listing to add. McIntosh C22 Specifications FREQUENCY RESPONSE ±0.5 db from 20 cps to 20,000 cps. DISTORTION Less than 0.2% at 10 volts output, 20 to 20,000 cycles. Less than .02% at 3 volts output, 20 to 20,000 cycles. HUM AND NOISE High Level Inputs: 85 db below rated output Low Level Inputs: Less than 1.5 microvolts at input terminals. INPUT SENSITIVITY AND IMPEDANCE Auxiliary, Tape, Tuner 1, and Tuner 2: 0.25 volts, 250,000 ohms. Phono 1 and Phono 2: 2 millivolts, 47,000 ohms. Microphone: 2.5 millivolts, 1 megohm. Tape Head: 2 millivolts, 1 megohm. Tape Compare: 0.25 volts, 250,000 ohms. OUTPUTS Main (2 jacks on each channel) : 2.5 V with rated output. Tape: 0.25 V with rated output. Left Plus Right: 1 V from generator impedance of 25,000 ohms. VOLTAGE AMPLIFICATION Auxiliary, Tape, Tuner I, and Tuner 2: To Main Output, 20 db (10 to 1). To Tape Output, 0 db (1 to 1). Phono 1 and Phono 2 (At 1 KC): To Main Output, 62 db (1250 to 1). To Tape Output, 42 db (125 to 1). Microphone: To Main Output, 60 db (1000 to 1). To Tape Output, 40 db (100 to 1). Tape Head (At 500 cps): To Main Output, 62 db (1250 to 1). To Tape Output, 42 db (125 to 1). AUXILIARY AC OUTLETS (5) 1 unswitched for turntable or tape machine (Red), 4 switched (Black). POWER REQUIREMENT 117 volts 50/60 cps AC, 34 watts. TUBES 6 each 12AX7. TAPE JACK SWITCH 2 position, connects panel jacks to allow signals to be fed from or to the C22 to record or playback using an external portable tape recorder. BASS CONTROLS Separate channel 11 position switch type,± 20db at 20 cycles. TREBLE CONTROLS Separate channel 11 position switch type,±20 db at 20,000 cycles. COMPENSATOR SWITCH RIAA or LP record equalization. TAPE SWITCH Normal, or Tape Monitor. RUMBLE FILTER 50 cps cutoff. HF FILTER 5000 cycle cutoff. ADDITIONAL SET·UP CONTROLS The following controls are located behind the front panel on the top of the C22 chassis. These controls are readily accessible by depressing the PANLOC buttons to slide the C22 forward from the mounting panel. OUTPUT LEVEL CONTROLS (L, L+ R, AND R) Allows the balance of the enti re system to be conveniently adjusted. LOW FREQUENCY TRIM CONTROLS (L AND R) Allows frequencies below 100 cps to be boosted up to 6 db TAPE EQUALIZATION CONTROLS (L AND R) Adjusts tape head input high frequency response. PHASE SWITCH 2 position, normal (0°) or reverse (180°). PILOT LAMP INTENSITY SWITCH 2 position, bright or dim. SIZE Front panel; 16 inches wide by 57/16inches high; chassis (including PANLOC shelf) 15 inches wide by 5 inches high by 13 inches deep, including connectors; clearance in front of mounting panel including knobs,lYz inches. WEIGHT 16 pounds net, 25 pounds in shipping carton. The SkyFi Testing Process for Preamplifiers: We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect the PCBs for discoloration from resistors or transistors that may have been running hot. On vintage units we often spot check select capacitors for value and ESR. When we first power on a preamplifier we connect its RCA output to a Sencore PA81 Power Analyzer which simulates real world loading conditions and gives us an oscilloscope interface. The first order of business is checking that the volume control works smoothly throughout its entire range with acceptable channel balance. This is accomplished by feeding a 1KHz sine wave into one of the preamp’s line level inputs while monitoring the preamp’s output on an oscilloscope. We then switch to a 1KHz square wave to test the tone controls, loudness function, and filters where applicable. During this step we are watching for equal alteration of the test signal by both channels. This also helps us identify dirty controls that will need treatment. Once the basic line stage functions are verified, we test each input individually. This is especially important for devices that use relays to select their sources. If the preamp is equipped with a phono stage we test that as well. We use an inverse RIAA filter which allows us to feed a reference test signal into the phono input with the proper RIAA equalization and level. A square wave or sine sweep is uséd to verify that the device’s phono stage is faithfully reproducing the RIAA curve. If the preamp under test has balanced inputs and/or outputs these are tested as well. We finish up our bench testing with a listening test with our bench amplifier and reference speakers. During this test we check for hum or hiss that may not have shown up in earlier testing. We also check that all of the tone controls and filters perform as expected. If the preamplifier has remote control functions these are also tested. Preamps with tube circuits or complicated power supply topologies are connected at our long term test rig for extended stress testing under real world conditions. Item Included Original Box Not Included Manual Not Included Remote Not Applicable Cables Yes - Captive Power Physical Condition 7 / 10 Working Condition 10 / 10 *Please scroll all the way down to view additional images for this listing (click to enlarge). ---------- SkyFi Audio - Curators of Vintage Audio Gear SkyFi Audio is a small startup business specializing in the purchase, reconditioning, and reselling of high end audio equipment. We only buy equipment that we admire and are passionate about. No mid-fi, no gimmicks, no junk. Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. If it does not meet or exceed the original manufactures specifications, it will not be sold. We are very selective about the equipment we purchase, focusing on mostly analog, high-build quality, American, and European built units. Through our sister company, which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Project, and Sony ES, we have access to OEM parts, service, and support. ---------- PURCHASING GUIDELINES: 1) This item will be professionally packaged and insured for safe transit to your home unless you opt for local pickup from our shop. All local pickup items are only wrapped in industrial strength clear stretch wrap if the original manufacturer packaging is unavailable. Local pickup is available in Glen Rock, NJ, just a half hour drive from Midtown Manhattan, with convenient parking near our building. If we don’t have the original manufacture’s packaging, we use heavy duty double-ply corrugated boxes with custom made to your item SealedAir Instapak expanding foam custom inserts. In many cases this has proven to be better than the original packaging! We also use high quality fiber reinforced tape to seal our packages. Lightweight items will be bubble wrapped and shipped in a high-quality box. 2) We do not review or accept any offers that do not go through the official eBay system. We have too many items for sale and it is nearly impossible to keep track of offers outside of the official system. Please do not message, email, or text any offers. 3) All listings are eligible for the eBay Global Shipping Program, unless the item exceeds the maximum weight/price requirements to your country. If this is the case simply message us via eBay as we accept bank wire transfers for international payments and frequently ship worldwide via UPS. 4) Please ensure your shipping address is correct within eBay as we will ONLY ship to the eBay/PayPal Confirmed Shipping Address. No exceptions. 5) eBay may charge and collect sales tax to your state/jurisdiction. Please understand we have no control over this. eBay v1.6 × × × × × × × × × × × × × × × × × × × × Tell a friend Visit store Watch now Postage info UPS Ground - $0.00 Local Pickup - $0.00 Click the Postage tab above the listing description for more info Additional delivery notes PICK UP OPTION Our items are available for pick-up. Pick up procedure is as follows: Purchase the item through eBay Email us to coordinate pickup PAYING VIA PAYPAL We accept PayPal on our all our items so you can shop with confidence. Simple choose the PayPal option when proceeding through the checkout. Additional Information No additional information at this time Ask seller a question You might also like Dynavector 10x3 High-Output MC Phono Cartridge Music Reference RM-5 MK II Tube Preamplifier with Phono Music Reference RM-9 Tube Amplifier With EL34's Marantz Model 150 Vintage AM/FM Tuner with Scope Contact To contact our Customer Service Team, simply click the button here and our Customer Service team will be happy to assist. Ask seller a question © SkyFi Audio Postage Click the Postage tab above the listing description for more info Payment Accepted Payment Methods PayPal Returns Returns are not accepted Seller will pay for return shipping. eBay integration by

Price: 8360 USD

Location: Glen Rock, New Jersey

End Time: 2024-08-02T21:13:37.000Z

Shipping Cost: 0 USD