McIntosh Integrated Amplifiers
A History

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MA 230 Preamp-Amplifier

ELECTRICAL: Stereo. Hybrid (solid state preamp and tube power amplifier). 30w/ch stereo, 60w mono. Response 20-20kHz (+0 -0.5dB). Distortion 0.5%. Noise and hum -75dB high level, -60dB low level . Output impedance 4, 8 and 16 ohms. Damping factor 10. Input sensitivity and impedance: high level 0.25V at 250k, phono 1.5mV at 47k, tape head 1.5mV at 1 meg. Tape output 0.25V into 25k. L+R output 10V into 5k. Dual concentric tone controls +18dB to -18dB. LF filter 50Hz at 12dB/oct. HF filter 5k at 12dB/oct.

FRONT PANEL: Glass panel at top. Anodized gold at bottom. Input selector: aux, tape, tuner, phono 1, phono 2 and tape hd. Bass and treble each dual concentric. Volume. Mode selector: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Balance. Rocker switches: comp: RIAA or LP, tape monitor, phase: 0 or 180, speaker: on or off, power: on or off, LF: flat or filter, HF: flat or filter, loudness: flat or compensate. Headphone jacks. Red power indicator.

BACK PANEL: Barrier strips for 4, 8, and 16 ohms, Outputs: Tape and L+R. High level inputs: tape mon, aux, tape and tuner. Low level inputs: ph 1, ph 2 and tape hd. Ground binding post. AC outlets: 2 switched, 1 unswitched. Fuse.

TUBES: 4-7591, 2-12AU7, 12AX7.

Size 5-7/16"H, 16"W and 14-1/2"D. Weight 43 lbs. Sold from 1963-1966. Last retail price $349.00

MA 5100 Preamp-Amplifier

ELECTRICAL: 45w/ch stereo, 90w mono. Response 20-20kHz (+0.5 -0.5dB). Distortion 0.25%. Noise and hum -75dB high level, -70dB low level re 10mV. Output impedance 4, 8 or 16 ohms. Damping factor 100. Power amp noise -90dB. Input sensitivity and impedance: high level 0.3V at 250k, phono 2.0mV at 47k, tape head 2.0mV at 500k. Tape output 0.3V. Dual concentric tone controls +18dB to -18dB. LF filter 50Hz at 12dB/oct. HF filter 5k at 12dB/oct. Phase switch: 0 or 180. L+R adjustable to 6V at 5k ohms.

FRONT PANEL: Glass panel at top. Input selector: aux, tape, tuner, phono 1, phono 2 and tape hd. Bass and treble each dual concentric. Volume. Mode selector: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Balance. Rocker switches: comp: RIAA or LP, tape monitor, phase, speaker, power, LF filter, HF filter, loudness. Indicator lights for tape, speaker and power. Headphone jacks.

BACK PANEL: Barrier terminals for speakers. Outputs: tape and L+R. High level inputs: tape mon, aux, tape, tuner. Low level inputs: ph 1, ph 2, tape hd. Ground binding post. L+R gain control. AC outlets: 3 switched, 1 unswitched. Fuse.

Size 5-7/16"H, 16"W and 14-1/2"D. Weight 25 lbs. Sold from 1966-1972. Last retail price $449.00

MA 6100 Preamp-Amplifier

ELECTRICAL: 70w/ch at 4 or 8 ohms, 40w/ch at 16 ohms. Response 20-20kHz (+0.5 -0.5dB). Distortion 0.20%. Noise and hum -90dB high level, -76dB low level re 10mV. Damping factor 50 at 8 ohms. Power amp noise -95dB. Input sensitivity and impedance: high level 0.3V at 250k, phono 2.5mV at 47k, tape head 3.0mV at 500k, power amp 3.0V at 100k. Tape output 0.3V. Dual concentric tone controls +16dB to -16dB. LF filter 50Hz at 12dB/oct. HF filter 7k at 12dB/oct. Presence boost 4dB at 1.5k.

FRONT PANEL: Glass panel. Input selector: aux, tuner 2, tuner 1, phono 1, phono 2 and tape hd. Bass and treble each dual concentric. Balance. Comp switch: pres, flat or loud. Volume with power switch. Mode selector: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Pushbutton switches: tape mon 1, tape mon 2, tape copy 1 to 2 and 2 to 1, LF filter, HF filter, phase, main speakers, remote speakers. Indicator lights for power, tape mon 1 and 2, main and remote speakers. Headphone jack.

BACK PANEL: Push terminals for main and remote speakers. Outputs: preamp, tape 1, tape 2. High level inputs: tape 1, tape 2, aux, tuner 1, tuner 2. Low level inputs: tape hd, phono 1, phono 2. Ground binding post. AC outlets: 3 switched, 1 unswitched. Circuit breaker. Panloc mounting.

Size 5-7/16"H, 16"W and 13"D. Weight 34 lbs. Sold from 1972-1979. Last retail price $699.00

MA 6200 Integrated Amplifier

ELECTRICAL: 100w/ch at 4 ohms, 75w/ch at 8 ohms. Response 20-20kHz (+0 -0.5dB). Distortion 0.05%. Noise and hum -95dB high level, -85dB low level re 10mV. Damping factor 30. Power amp noise -100dB. Input sensitivity and impedance: high level 0.25V at 100k, phono 2.0mV at 47k and 100pF, power amp 2.5V at 22k. Tape output 0.25V. Program equalizer: 30, 150, 500, 1500 and 10,000Hz boost or cut 12dB. Power Guard.

FRONT PANEL: Glass panel. Illuminated.. Loudness: flat to max, Balance, Equalizer frequency: 30, 150, 500, 1500 and 10k. Volume. Input selector: aux 1, aux 2, tuner, phono 1 and, phono 2. Mode selector: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Pushbutton switches with indicator lights: tape mon 1, tape mon 2, tape copy 1 to 2 and 2 to 1, Speakers: 1, 2 and 3, power. Power guard lamps: normal and limit. Headphone jacks. Tape 2 in and out jacks.

BACK PANEL: Push terminals for speakers 1, 2 and 3. Jumper: preamp out and amp in. Outputs: tape 1 and tape 2. High level inputs: aux 1, aux 2, tuner, tape 1, tape 2. Low level inputs: ph 1, ph 2. Ground binding post. Turntable switch: auto or on. AC outlets: 3 switched, 2 switched (turntable auto-on). Fuses: turntable and main. Panloc mounting.

Size 5-7/16"H, 16"W and 13"D. Weight 30 lbs. Sold from 1978-1991. Last retail price $1899.00

MA 6400 Integrated Amplifier.

ELECTRICAL: 100w/ch at 4 ohms. Response 20-20kHz (+0 -0.5dB). Distortion 0.005%. Dynamic headroom 2.4dB. Noise and hum -100dB high level, -90dB low level re 10mV. Damping factor 40. Input sensitivity and impedance: high level 0.25V (10V max) at 22k, phono 2.5mV (90mV max) at 47k and 65pF, power amp 2.5V. Bass and treble boost or cut 12dB. Power Guard.

FRONT PANEL: Glass panel. Illuminated. Power level meters (linear watts or dB). Bass and treble. Input selector: CD 1, CD 2, tuner, video and ph/aux, Volume, Loudness: flat to max, Balance, Pushbutton switches with indicator lights: tape mon 1, tape mon 2, tape copy 1 to 2 and 2 to 1, Mono, Speakers: 1 and 2, power. Power guard lamps, Headphone jack. IR sensor.

BACK PANEL: Barrier strips for speakers 1 and 2. Outputs: Main, Tape 1, Tape 2. Processor: from and to. Processor switch: in or out. Inputs: tape 2, tape 1, video, tuner, CD 2, CD 1, aux, ph, power amp. Selector switch: aux or ph. Pwr amp input switch: ext or int. Ground binding post. Control connectors: CD 1, power, ext sensor. Data ports: tuner, CD 2, CD 1, aux, sum, tape 2, tape 1, video. AC outlets: 1 switched, 1 unswitched. Fuse. Has hand remote HR6400.

Size 5-3/8"H, 17-1/2"W and 18-1/8"D. Weight 41 lbs. Sold from 1995-. Last retail price $3500.00

MA6450 Integrated Amplifier

Same as MA6400 but without headphone output and phono preamp.

Size 5-3/8"H, 17-1/2"W and 18-1/8"D. Weight 41 lbs. Sold from 1998-. Last retail price $

MA 6800 Integrated Amplifier.

ELECTRICAL: 150w/ch. Response 20-20kHz (+0 -0.5dB). Distortion 0.005%. Output impedance 2, 4 and 8 ohms. Dynamic headroom 1.8dB. Noise and hum: 110dB power amp, -100dB high level, -90dB low level re 10mV. Damping factor 40. Input sensitivity and impedance: high level 0.25V (10V max) at 22k, phono 2.5mV (90mV max) at 47k and 65pF, power amp 1.4V. Bass and treble boost or cut 12dB. Power Guard.

FRONT PANEL: Glass panel. Illuminated. Power level meters (linear watts or dB). Bass and treble. Record selector with indicator lights: ph/aux, CD 1, CD 2, tuner, tape 1, tape 2, tape 3, video. Listen selector with indicator lights: ph/aux, CD 1, CD 2, tuner, tape 1, tape 2, tape 3, video. Volume, Loudness: flat to max, Balance, Pushbutton switches with indicator lights: mono, lis proc, rec proc, rec mon, mute, speakers 1 and 2, power. Power guard lamps, Headphone jack. IR sensor. Digital volume readout.

BACK PANEL: Barrier strips for 2, 4 and 8 ohms. Listen jacks: pwr amp in, preamp out, Processor: from and to, pwr amp input switch: ext or int. Record jacks: tape 3, tape 2, tape 1, processor: from and to. Inputs: video, tape 3, tape 2, tape 1, tuner, CD 2, CD 1, aux, ph, Selector switch: aux or ph. Ground binding post. Control connectors: CD 1, CD 2, power, ext sensor, SCR, tuner. Data ports: pwr ctl, sum, video, tape 3, tape 2, tape 1, tuner, CD 2, CD 1, aux, home. AC outlets: 6 switched, 1 unswitched. Fuse. Has hand remote MA6800.

Size 7-1/16"H, 17-1/2"W and 20"D. Weight 70 lbs. Sold from 1994-. Last retail price $5000.00

MA6850 Integrated Amplifier

Same as MA6800 but without headphone output and phono preamp.

Size 7-1/16"H, 17-1/2"W and 20"D. Weight 70 lbs. Sold from 1998-. Last retail price $

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