Mcintosh MA6300, MA6900, MA7000, MA2275 schematic

2.08

Integrated Amplifier

Comparison Chart

FEATURE MA6300 MA6900 MA7000 MA2275

Output Meters Yes Yes Yes Yes
Circuit Design Semiconductor Semiconductor Semiconductor Vacuum Tube

Watts x Two @ 2/4/8 ohms

Front Panel Styling New New New New
Speaker Outputs One One 2, 4, or 8 ohms One 2, 4, or 8 Ohms
Preamp Outputs Jumper Two, Switchable Two, Bal/UnBal Two, Always on
Tape Outputs One One One One
Inputs Six Six Seven Six

Electromagnetic In/Out
Switching

160,160,100 direct

coupled

Yes Yes Yes Yes

200, 200, 200

Autoformer Coupled

250, 250, 250

Autoformer Coupled

75, 75, 75

Transformer Unity

Coupled

Output Watt Meters Yes 4 Ohm Calibration Yes Yes Yes

Tone Controls No Five Band Equalizer Five Band Equalizer
IR Remote Control Yes Yes Yes Yes

MM Phono Yes Yes Yes Yes, Twin Tube\Yes
Tube Saver Auto Turn On

Delay
Ext. IR Sensor Jack No Yes Yes Yes

Switched Data Ports Yes Yes Yes Yes
Record Monitor No No Yes Yes
Power Control Output Yes Yes Yes Yes

Motor Driven Volume Control Yes Yes Yes Yes
Lighting LED Bulbs LED Fiber Optic LED Fiber Optic

Soft Mute Yes Yes Yes Yes
Headphone Amp Yes Yes Yes Yes
Pre Amp Output 8 Volts 8 Volts 8 Volts 8 Volts
Pre Amp Distortion Max 20Hz

to 20kHz
Pre Amp S/N Ratio A Weighted
Power Amp Distortion Max.

20Hz to 20kHz Both Chan
Operating at Rated Power

Power Amp S/N Ratio at Rated
Output

90dB Phono; 97dB

- - - Yes

0.005% 0.005% 0.005% 0.08%
90dB Phono; 100dB

High Level

0.005% 0.005% 0.005% 0.50%

110dB 110dB 115dB 110dB

High Level

90dB Phono; 100dB

High Level

Bass Treble plus Tone

Bypass

80dB Phono; 97dB

High Level