Quad Elite QSP stereo amplifier the latest-1 in the line of Peter Walker's famous current-dumping technology amps. This is where a very high quality class A low power amplifier feeds a high power class AB amplifier to give 140W into 8 ohms and 250W into 4 of lovely sound. Just right for Quad ESLs or any but the most inefficient speakers and they don't weigh a ton either, about 35lbs.
Although I've seen postings claiming that these amps have poor reliability, this one has performed flawlessly for over a year. I just have too many amplifiers.
Google for many reviews. Condition is verygood/excellent. Shipping and Paypal are extra.