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Audio Research Reference 150SE Power Amplifier

code: AUDIORESREF150SE
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This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

Simply put, the REF150SE is a breakthrough in stereo power amplification. Replacing the REF150 - which was one of the most respected modern stereo amplifiers - was a daunting task, but it has been accomplished. The REF150 SE 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 SE has much more packed into its chassis. Refined front-panel cosmetics reflect the updated look of current-generation models.

This item cannot be ordered online. If you are interested please click on the Ask a Question button below.

The REF150SE 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 Audio Research's Anniversary Edition preamplifier effortlessly link input stage to output stage, which is powered by two matched quads of Russian KT150 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 SE when compared to its predecessor. Those familiar with the boundary-extending performance of the Anniversary Preamplifier will hear similar qualities from the REF150SE.

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 SE does not drive a loudspeaker so much as it dominates it and brings to life what any speaker is truly capable of. 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 REF150SE amplifies more critical musical information from your preamplifier and source components than you have ever heard before. Prepare to be astonished once again.

Technical Specification:

  • Power Output: 150 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 150 watts, below 0.03% at 1 watt. Approximate actual power available at 'clipping' 160 watts (1kHz). (Note that actual power output is dependent upon both line voltage and 'condition' i. e. if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical)
  • Power Bandwidth: (-3dB points) 5Hz to 80kHz
  • Frequency Response: (-3dB points at 1 watt) 0.5Hz to 120 kHz
  • Input Sensitivity: 2.0V RMS BAL for rated output. (24 dB Bal gain into 8 ohms)
  • Input Impedance: 300K ohms Balanced
  • Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)
  • Output Taps: 16 ohms, 8 ohms, 4 ohms
  • Output Regulation: Approximately 0.6dB 16 ohm load to open circuit (Damping factor approximately 14)
  • Overall Negative Feedback: 14dB
  • Slew Rate: 13 volts/microsecond
  • Rise Time: 2.0 microseconds
  • Hum & Noise: Less than 0.1mV RMS – 114dB below rated output (IHF weighted, input shorted)
  • Power Supply Energy Storage: Approximately 1040 joules
  • Power Requirements: 105-125VAC 60Hz (210-250VAC 50Hz) 730 watts at rated output, 900 watts maximum, 420 watts idle
  • Tubes Required: 2 – Matched quad KT150 – Power Output; 4 – 6H30 Driver
  • Dimensions: 19"(48.3cm) W x 83⁄4" (22.2cm) H x 191⁄2" (49.5cm) D. Handlesextend 11⁄2" (3.8cm) forward
  • Weight: 75lbs. (34.2kg) Net; 90lbs. (41kg) Shipping

We endeavour to despatch same day for orders placed up to 2pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is recieved. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Turntableworld or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

COLLECT IN STORE OR HOME INSTALL:At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock. 

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