Excellent condition Audio Research Reference 110 power amplifier. Comes with all the original packaging, manual, paperwork, & IsoTek EVO3 power cable. It has the midlife AR upgrade of Tung-Sol KT120 valves fitted rather than 6550 & includes a brand new pair. Two sets of the 4 input valves are included- original factory supplied Sovtek, & a set of precision selected Sovtek which I bought from Upscale Audio & which are currently fitted. I replaced the original black handles for silver ones which were supplied by Audio Research (the black ones are included also), & a HiFi Tuning Supreme fuse is also fitted.

The REF 110 produces 125 watts when using the KT120 valves. There are 4, 8, & 16 ohm speaker taps & XLR inputs on the rear.

I had the amp serviced at the end of last year & the KT120 valves were tested at the time of the service. Seven of the KT120 tested strong with one testing low strength. This was replaced with a new one as well as second new KT120 to give a new matched pair. Please note that the photos show 6550 valves installed but I have changed back to the KT120 recently and the amp is being sold with the KT120.

I’ve owned this amp for approximately 10 years, having bought it from a friend who bought it as a store demo. For about 5 years of my ownership it was in storage & has had only low use before & after the storage period. It is in excellent cosmetic condition & functions perfectly. Loads of power yet very refined with tight bass with excellent control. I’m only selling as I’m moving to a lower powered Audio Research amp that better suits my speakers.

Lots of great reviews & a few are included below as well as further information.

https://www.arcdb.ws/model/REF110

https://www.absolutesounds.com/pdf/main/press/ARC%20REF110%20HFC0807forweb.pdf

https://www.soundstagenetwork.com/revequip/audioresearch_ref110.htm

https://www.stereophile.com/content/audio-research-reference-110-power-amplifier

https://www.arcdb.ws/Database/REF110/ARC_REF110_web_flyer.pdf