McIntosh MC2100 Vintage Amplifier from ABKCO Music & Records - THE ROLLING STONES and MORE!

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General:

This is no ordinary MC2100 vintage McIntosh amplifier.

This MC2100 comes to you from ABKCO Music & Records, home to The Rolling Stones, Chubby Checker, Sam Cooke, and many more! 

Check out our photos to see ABKCO owner & founder Mr. Allen Klein alongside the BEATLES, with McIntosh gear prominently featured in his office and recording studios.

Born in Newark, NJ, Mr. Klein was an American businessman whose aggressive negotiation tactics fundamentlly changed industry standards for compensating recording artists. Mr. Klein also increased profits for his musician clients by negotiating new record company contracts.

He first scored monetary and contractual gains for Buddy Knox and Jimmy Bowen, one-hit rockabillies of the late 1950's, then parlayed his early successes into a position managing Sam Cooke.

He went on to manage The Beatles and the Rolling Stones simultaneously(!!!), along with many other artists, becoming one of the most powerful individuals in the music industry during his era. (Above three paragraphs courtesy of Wikipedia with some editing)

SkyFi Service Notes:
• This unit was fundamentally functional on arrival, but we performed some preventative capacitor replacements in areas where we've seen drifting or failure in other MC2100, MC2105, and MC2300 vintage amplifiers.
• All transistors remain original.
• The fuse holder was replaced as the original part was cracked.

SktFi Cosmetic Notes:
• Slight scratching and wear on transformer covers.
• Output heatsink grill had a bend which we mostly removed.
• Speaker terminals for both channels have damaged barrier sections.
• Light wear to remaining metal surfaces.

More on ABKCO Music & Records:
ABKCO Music & Records is one of the world’s leading independent entertainment companies. It is home to iconic music catalogs that include compositions and recordings by Sam Cooke, The Rolling Stones, Bobby Womack, Eric Burdon, The Animals, Herman’s Hermits, Marianne Faithfull, The Kinks, the works of Norman Luboff (Yellowbird) as well as the current songwriters Ben Margulies (co-writer of Mariah Carey), Devvon T McLeod (pka Devvon Terrell) and the Cameo Parkway masters by such artists as Chubby Checker, Bobby Rydell, Clint Eastwood, The Dovells, ? & The Mysterians, The Tymes and Dee Dee Sharp.

ABKCO’s recordings are of the highest resolution audio quality available. We were the first label to launch our entire catalogue on hybrid SACD and continue to make our catalogue digitally available in the highest resolution audio quality available, partnering with companies including HD Tracks, Acoustic Sound and HIGHRESAUDIO for DSD downloads.

ABKCO is at the forefront of new technologies in the entertainment field and is in active development of several multi-platform projects, theatrical productions and innovative educational tools to ensure its catalog is enjoyed by generations of fans for years to come.

Brand Background:
McIntosh Laboratory is an American manufacturer of handcrafted high-end audio equipment based in Binghamton, New York. The company was founded in 1949 by Frank McIntosh. The company designs and produces audio amplifiers, stereo tuners and other consumer electronics products.

Ownership:
Single Owner - ABKCO Music & Records

Connections:
RCA inputs, speaker screw terminals and captive power cord.

General Sound:
Accurate to the recording

Cosmetic Condition:
6/10 = Fair. Three to four minor scratches, or one major scratch.. See our detailed rating description here.

Working Condition:
Working perfectly and tested in our lab and listening room.

Included:
Just the unit and power cord.

Packing:
Will be packed using our highly developed in-house process and custom packing materials.Specs:
Technical Specifications
105 WPC stereo
210 W monoural

Frequency Response: 
20 Hz - 20 kHz 
(+0 – 0.25dB)

Distortion: 
0.25%

Noise and Hum: 
-90dB

Output Impedance: 
4, 8, and 16 ohms stereo
2, 4, and 8 ohms mono 

Damping Factor: 
11

Input Impedance: 
200k

Input Sensitivity: 
0.5v

McIntosh Included Patented Features:
Sentry Monitor
Autoformers

Produced and Sold:
February 1969 - 1978

Dimensions:
7-3/4" H
11-3/4" W
17" D

Weight:
57 lbs.

Approximate Age:
1975

Link to Manual:
Click Here

Recommended Cables:

Kimber Kable - RCA Interconnects - Better

Kimber Kable - RCA Interconnects - Best

Kimber Kable - Speaker Cables - Better

Kimber Summit Series Monocle XL Speaker Cables (PAIR) - Best

Kimber Summit Series BiFocal XL Bi-Wire Speaker Cables (PAIR) - Best If Applicable

Testing Process:

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. 

If the amplifier passes visua––l inspection, we move on to a controlled power on sequence using a Sencore safety analyzer to monitor current draw in real time. Once the amplifier is determined to be safe to operate, we connect it to full AC mains for function and power testing. We connect the speaker outputs of the amplifier to a Sencore PA81 Power Analyzer which acts as a dummy load, DC offset monitor, and oscilloscope interface. We start with a low level 1KHz test signal at the amplifier’s input and slowly increase its amplitude while monitoring the output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. If the device under test has both balanced and single ended inputs they are both tested at this time. We finish off the bench evaluation with a 1KHz square wave check and a 20Hz to 20KHz sine sweep to assess the amplifier’s frequency response characteristics. This battery of tests will usually reveal if the amplifier has any issues that need further attention.

Before the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics. 

If the unit passes all of these tests it is moved to our long term testing rig where we simulate real word operating conditions for 6-8 hours. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when the unit has fully come up to temperature.