![]() Next we see a row of single ended RCA connections, namely SUB out, TAPE out, TAPE (Input), AV input, TUNER and CD. There is no biwire facility or catering for more than one pair of speakers. Then we find a set of four speaker binding posts, able to accept 4mm banana plugs, spade connections and bare wire. To the rear we find from left to right, an IEC power inlet socket with integral fuse holder, the fuse rating depending upon mains input voltage, the value thoughtfully printed on the transformer cover above. Between the two in the centre of the front panel is a toggle on/off power switch aligned horizontally, beneath which is the remote control sensor window. I won’t go into details of how the two modes work, save that Pentode mode gives a higher wattage output with a slightly less refined sound whereas Triode mode has a lower output wattage, but has greater detail and clarity.įront panel controls consist of a machined alloy rotary knob to the left which is the source selector and an identical rotary knob for volume control to the right of the panel. The end user has a choice of power output modes between Pentode and Triode. The review sample needed no such adjustment but I took the time to read the owner’s handbook and it seems simple and painless. Betwixt the valves on the valve base level there is a simple voltmeter and a potentiometer that makes setting the bias child’s play and completely safe, even for the most novice of owners. A rather substantially built chrome plated valve cover cage is supplied, removed by slackening off four Allen bolts and sliding the cover along keyhole slots in the cover’s base plates to quickly release the cage.įor those that don’t own or know how to operate a multimeter, or have the confidence to go poking around within the internals of a valve amplifier to adjust the valve bias settings, Unison Research have thoughtfully provided a simple yet effective way of adjusting the bias current settings. The remainder of the chassis is painted black however and as a foil to that the valve bases are inset into two polished alloy heat shields which extend from the front panel in a sweeping arc upwards, meeting the top plates of the transformer covers. The sample supplied for review sported a real Cherry wood fascia which I found rather attractive and a welcome change from the ubiquitous black or silver finish. Dominic Marsh has a play with their Triode 25 valve amplifier.Īt first glance this amplifier looks positively handsome. In case you are not familiar with the name Unison Research, it is an Italian company in business for some 20 years or so at Treviso, a municipality just to the north of Venice, with a well earned reputation for producing some excellent hifi components.
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