Here is a great pair of vacuum tube Monoblock amplifiers from Audio Research - the M-100. They have strong testing GE 6550 tubes installed and they keep their bias after warmup. They are in good cosmetic condition and work perfectly. The external securing ring for the operate/set bias switch on one amplifier is missing, but the switch feels very secure.
All of the pre-owned items that we sell are thoroughly inspected and tested both on our test bench and in our listening room. Audio Research M-100 Vacuum Tube Monoblock Amplifiers. Single Loving Audiophile Owner / Non Smoker. Good - Minor Blemishes and Scratches, missing secure ring for one switch. 50 lbs x 2 Boxes.
Our unique products, unparalleled service and "bombproof" packaging keeps our customers coming back again and again. We look forward to earning your repeat business! _gsrx_vers_856 GS 7.0.20 (856). The item "Audio Research M-100 Vacuum Tube Monoblock Amplifiers Vintage 6550 Audiophile" is in sale since Monday, October 28, 2019.This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "highendaudioauctions" and is located in Brooklyn, New York. This item can be shipped worldwide.