Audio Research REF150 Datasheet

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REFERENCE
150
Stereo Power Amplifier
Simply put, the REF150 is a breakthrough in stereo power amplification. Replacing the REF110which was one of the
finest and most sought-after modern stereo amplifierswas a daunting task, but it has been accomplished. The REF150
offers more power, greater dynamic thrust, a more vivid and resolved presentation, greater finesse, and quieter operation.
It is the new benchmark.
Having identical outer dimensions as its predecessor, the REF150 has much more packed into its chassis. Refined front-
panel cosmetics reflect the updated look of current-generation models, with silver units having silver handles and silver
top covers, while black units have black handles and black cover. (Colors may be mixed to match older models.)
The REF150 is a fully-balanced design, so its inputs are balanced XLR only. It has a 20-amp IEC power connector, 4-8-16
ohm output taps and 12V triggers arrayed on the rear panel. Under the top cover there are a number of circuit
enhancements resulting in stunningly improved performance.
First, power-supply energy storage has been doubled to some 1040 joules. All-new interstage coupling capacitors using
technology and materials first incorporated in our Anniversary Edition preamplifier effortlessly link input stage to output
stage, which is powered by two matched quads of KT120 output tubes driven by 6H30 twin triodes. There is more than
ample multistage solid-state regulation. Output stage coupling is a combination of “ultralinear” and Audio Research’s
patented “partially cathode-coupled” topology, which is superior to conventional pentode or triode operation.
Larger, wide-bandwidth output transformers handle the greater output with ease. Power output is rated at 150 WPC into
4-, 8- or 16-ohm speaker loads. Each channel is very quietly fan-cooled using new low-turbulence intakes, with three
selectable fan speeds. Internally there is a small LCD display that indicates tube hours.
With all of these changes one would logically expect enhanced performance. But it is fair to say you will be shocked by
the amount of improvement you hear from the REF150 when compared to its predecessor. Those familiar with the
boundary-extending performance of the Anniversary Preamplifier will hear similar qualities from the REF150.
The immediate impression conveys much greater speed, power and control compared to any other tube power amplifier
you can think of. Bass extension, harmonic delineation and speaker driver control are the best ever to come from an
Audio Research tube amplifier, regardless of power output and that is saying something. The REF150 does not drive a
loudspeaker so much as it dominates it and brings to life the most from any speaker. Paired with capable front-end
components and good cabling, the results are nothing short of a revelation. You will hear inner harmonic structure and
dynamic realism that simply were not present before, within an envelope of air and spatial cues that let you know that
you are hearing everything that the recording has to offer.
In short, the REF150 amplifies more critical musical information from your preamplifier and source components than you
have ever heard before. Prepare to be astonished once again.
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Summary of Contents

Page 1 - REFERENCE

!REFERENCE 150 Stereo Power Amplifier Simply put, the REF150 is a breakthrough in stereo power amplification. Replacing the REF110—which

Page 2 - SPECIFICATIONS

! SPECIFICATIONS POWER OUTPUT: 150 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6%

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