Pretty sure this was the amp that started the craze - the venerable KG Current Feedback Amplifier 3.

Highlights:

1. Fully balanced, fully discrete and Class-A
2. Proper dual mono with two PSU's and toroids with brass mounting hardware to keep ferrous stuff out of the core
3. Matched Toshiba 389BL & 109BL input FETs
4. Runs zero-overall negative feedback
5. Will take SE or BAL and will output native SE and BAL
6. Outputs protected against DC faults
7. All small signal wiring is shielded copper
8. All output wiring is silver
9. Volume regulation by a quad TKD 4CP-601 pot
10. AC power inputs have filtering

The on/off switch is at the bottom to not route noisy wiring to the front near sensitive circuitry. The amp is big and heavy, so shipping only to EU. Transformers have primaries only for 230VAC, so not much sense to ship overseas.

The amp runs around +20C over ambient room temps, so it'll keep you nice and warm during the winter.