Rob wrote:
Hi - I wonder if anyone can shed some light on the operation of a
Hitachi HMA 7500 mk2 pre/power amp:

1. It can connect through two in/outputs - direct and 'condenser
coupling'. Anyone any idea what this coupling thing is?

2. There's a switch on the front of the power amp labelled 'BLT' -
when it's switched in the speakers switch off. 'BLT' is also marked
on the LH direct input on the power amp, and the meters have a range
marked BLT, at double the watt markings of a scale beneath. Any idea
what that's all about (apart from sandwiches)?

Damm missed that need new glasses