Audio Research Reference 75SE Power Amplifier

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The Reference 75SE is a stunning amplifier in every way - performance, styling and reliability combined to elevate your music listening to a new experience. Capable of controlling a wide variety of speakers, the Reference 75SE will transport you into the musical performance unlike any other comparable amplifier. At the heart of the Reference 75SE is decades of proven Audio Research vacuum tube technology, a legacy unrivaled by any other manufacturer of tube electronics. Developed through hundreds of hours of critical listening, the carefully selected components comprising the Reference 75SE combine to provide an amplifier which transcends traditional hi-fi, instead relaying music with realism and tangibility.

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

Visually, the Reference 75SE hearkens back to past Audio Research products, taking inspiration from earlier amplifier designs. With its two large VU meters, which display power output as well as provide bias adjustments, the Reference 75SE has a timeless appearance resembling precision laboratory equipment and an overbuilt, industrious aesthetic.

The KT150 vacuum tube delivers power from the amplifier to your speakers. Newly designed solely for the audio industry, the KT150 offers higher power handling and current delivery. A matched pair of tubes per channel run conservatively, ensuring stable operation and many hours of trouble-free listening. Custom designed capacitors couple the output of the tubes to the speakers for the purest signal possible.

The Reference 75SE is the new generation from a lineage of amplifiers only Audio Research could produce.  Experience real music and unleash the capacity of your system - music in High Definition®.

Technical Specification:

  • Power Output: 75 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 75 watts, below 0.05% at 1 watt. Approximate actual power available at ‘clipping’ 76 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) 7Hz to 60kHz
  • Frequency Response: (-3dB points at 1 watt) 0.7Hz to 75 kHz
  • Input Sensitivity: 1.4V RMS BAL for rated output. (25 dB Bal gain into 8 ohms)
  • Input Impedance: 300K ohms Balanced
  • Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)
  • Output Taps: 8 ohms, 4 ohms
  • Output Regulation: Approximately 1.0dB 8 ohm load to open circuit (Damping factor approximately 8)
  • Overall Negative Feedback: 15dB
  • Slew Rate: 10 volts/microsecond
  • Rise Time: 4.0 microseconds
  • Hum & Noise: Less than 0.06mV RMS – 112dB below rated output (IHF weighted, input shorted)
  • Power Supply Energy Storage: Approximately 520 joules
  • Power Requirements: 105-125VAC 60Hz (210-250VAC 50Hz) 410 watts at rated output, 500 watts maximum, 230 watts idle
  • Tubes Required: 2 - Matched pair KT150 – Power Output; 2 – 6H30 Driver
  • Dimensions: 19" (48.3 cm) W x 8.75" (22.2 cm) H x 19.5" (49.5 cm) D. Handles extend 1.5" (3.8 cm) forward
  • Weight: 47 lbs. (21.3 kg) Net; 63 lbs. (28.6 kg) 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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