MA 6100 rear
The McIntosh MA-6100 is a stereo preamp/power amp combined on one chassis, "integrated amplifier." Provision is made for "interrupting the circuit" between the pre- amp and power amp section via stereo preamp-out and power amp-in jacks, which permits the insertion of special accessory units such as speaker equalizers, subwoofers, or other signal-shaping devices. It also permits the use of either section by itself.
A useful feature in connection with the speaker options is a switch that selects the load impedance depending on what combination of speakers is being used-the switch is found at the rear and has two positions, one for 8 to 16 ohms and the other for 4 ohms.
There are four AC convenience outlets for powering other equipment; of these one is always "hot" and three are controlled by the unit's main power switch.