McIntosh MC205 5-Channel Home Theater Amplifier, Complete Set

Free Shipping on *ALL* Electronics (Excluding Speakers, Contiguous 48 US States Only)

This is a complete MC205 set that's perfect for building your McIntosh home theater setup.

In very good condition with little to no signs of use. All meters are super bright, clean, and responsive. All backlighting is working perfectly, and the front faceplate glass is fully intact.

This will ship to you in a new super tough double McIntosh box for safe transport.

McIntosh Performance Features Include:
• Power Output
The MC205 consists of five Power Amplifier Channels, each capable of 200 watts into 4 ohm or 8 ohm Loudspeakers with less than 0.005% distortion.

• Power Guard
The patented McIntosh Power Guard Circuit prevents the amplifier from being over driven into clipping, with its harsh distorted sound that can damage your valuable Loudspeakers.

• Dynamic Power Manager
The MC205’s Dynamic Power Manager (DPM) circuitry allows for the connection of either 4 ohm or 8 ohm Loudspeakers, while at the same time delivering identical power output. A peak output current of 25 amperes per channel ensures that it will successfully drive high quality Loudspeakers such as McIntosh, for a truly exciting sound experience.

• Balanced and Unbalanced Inputs
Balanced connections guard against induced noise and allow long cable runs without compromising sound quality.

• Special Power Supply
A regulated Power Supply and a very large Toroidal Wound Power Transformer, ensures stable noise free operation even though the power line varies.

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

General Sound:
Accurate to the recording

Cosmetic Condition:
8/10 = Very Good. Excellent front faceplate, one minor flaw on chassis side or top.. See our detailed rating description here.

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

Included:
Everything like when it arrived new (Amp, Manual, Power Cord, New McIntosh Shipping Carton.

Packing:
Original Manufacturers Packing

Original MSRP:
$7,500.00

Specs:
Power Output
Minimum sine wave continuous average power output per channel, all channels operating is: 200 watts into a 4 ohm or 8 ohm load

Output Load Impedance
8 and 4 ohms

Rated Power Band
20Hz to 20,000Hz

Total Harmonic Distortion
0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz

Dynamic Headroom
1.7dB

Frequency Response
+0, -0.25dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz

Input Sensitivity (for rated output)
2.0 Volt Balanced with a 4 ohm Loudspeaker
1.0 Volt Unbalanced with a 4 ohm Loudspeaker
2.8 Volt Balanced with a 8 ohm Loudspeaker
1.4 Volt Unbalanced with a 8 ohm Loudspeaker

Signal To Noise Ratio (A-Weighted)
112dB below rated output

Intermodulation Distortion
0.005% maximum, if the instantaneous peak power output is rated power or less per channel with all channels operating for any combination of frequencies from 20Hz to 20,000Hz.

Wide Band Damping Factor
Greater than 70 at 4 ohms Greater than 140 at 8 ohms

Input Impedance
20,000 ohms Balanced
10,000 ohms Unbalanced

Power Guard
Less than 2% THD with up to 14dB overdrive at 1,000Hz

Power Requirements
120 Volts, 50/60Hz at 10 Amps

Dimensions:
Width is 17-1/2 inches (44.45cm)
Height is 9-7/16 inches (23.97cm) including feet Depth is 21 inches (53.3cm) including the Front Panel and Cables

Weight:
81 lbs.

Approximate Age:
2014

Link to Manual:
Click Here

Recommended Cables:

Kimber Kable - RCA Interconnects - Better

Kimber Kable - RCA Interconnects - Best

Kimber Kable - BALANCED XLR Connectors - Better

Kimber Kable - BALANCED XLR Connectors - 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 

Kimber Kable - Power Cords - Better

Kimber Kable - Power Cords - Best

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 visual 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.