Vintage McIntosh MC2205 // Solid-State Amplifier / Professional Electronic Restoration / New Glass / AX3412

The McIntosh MC2205 is a harmonious blend of classic design and performance. This amplifier exudes timeless elegance with its iconic blue meters and signature black glass front panel. With McIntosh's legendary quality and attention to detail, the MC2205 offers both a visual and auditory masterpiece that continues to impress, nearly fifty years after its release. With this restoration, we rebuilt the meter boards, installed LEDs, new gels and new glass – we opted not to mount the bezel on the glass, for a sleek, uninterrupted look.

RESTORATIONS

• Full 30-point service check
• Installed LEDs
• New Glass
• Repaired meter boards
• Cleaned controls, switches, and chassis

SPECS

Type   Solid state power amplifier

Power output   200 WPC > 8Ω (stereo), 400 W > 8Ω (mono)

Frequency response   10Hz to 100kHz

Total harmonic distortion   0.1%

Damping factor   16

Input sensitivity   0.75V

Signal to noise ratio   95dB

Speaker load impedance   1Ω to 8Ω

Cabinet   L14 (also fits L21 and L54)

Dimensions   7-1/8"H x 16-3/16"W x 14-1/2"D

Weight   85 lbs.

LINER NOTES

The output signal of the MC2205 passes through an output transformer, which is designed to match the output terminal of any impedance so that the maximum output is obtained for all frequency signals regardless of the output terminal. This transformer also protects the speakers in the event of an amplifier failure. When a DC component is mixed into the output, the transformer eliminates the component and prevents damage to the speakers. To prevent overloading of the output transistor, the output signal is always monitored by a Macintosh proprietary monitoring circuit. This circuit becomes high impedance when the output level exceeds the rated value, but this has no effect on the output. When the output reaches its maximum value, the monitoring circuit limits the signal supplied to the output transistor to prevent shorting of the output of the amplifier or damage to the output transistor. This monitoring circuit monitors the plus and minus sides of the output signal separately.