There doesn’t seem to be any info on this amplifier out on the web, so I’m posting it here for future reference.
This was the first McIntosh car amplifier made, all the ones that came after looked very different. It’s 4x100 watts, .005% THD. Idle current is around 3.5A at 13.8VDC, and it has a rather odd plug for remote turn on. There are actually 4 pins- one is remote not sure what the others are for, but possibly power guard signaling as in the later units.
The plug itself is a pull to release Hirose connector, I was able to figure out the part number in case anyone wants to order one. I just got a pair myself off eBay for around $20, the part number is HR10A-7P-4P.
This was the first McIntosh car amplifier made, all the ones that came after looked very different. It’s 4x100 watts, .005% THD. Idle current is around 3.5A at 13.8VDC, and it has a rather odd plug for remote turn on. There are actually 4 pins- one is remote not sure what the others are for, but possibly power guard signaling as in the later units.
The plug itself is a pull to release Hirose connector, I was able to figure out the part number in case anyone wants to order one. I just got a pair myself off eBay for around $20, the part number is HR10A-7P-4P.
Attachments
Nudes for the masses, inside is very different than the later models. Power supply is using MTP50N05EW FETs, output stage is 2SC3281/2SA1302 based with Motorola 2SC3298/2SA1306 drivers. Input is fully balanced, and there are only 2 wires soldered to the ‘control’ jack. I believe this confirms my suspicion that there may be a power guard output, as there are only 2 wires present. So remote and PG make sense, as that’s what the later units had.
Attachments
Control jack, showing the 2 wires. From the outside of the amp remote is the first pin clockwise from the large alignment key at the top, the other pin (assumed to be PG related) is across from that on the bottom left. The other two are unpopulated.
