Audio Research 150.2 Solid state class T digital switching stereo power amplifier

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Power output 150 watts per channel into 8 ohms, 300 watts per channel into 4 ohms, both channels driven, 1% THD
Power bandwidth (-3dB points) 5Hz to 40 kHz into 8 ohms or 4 ohms
Frequency response (-3dB points at 1W) 5 Hz to 120 kHz
Input sensitivity 1.4V RMS for rated output (27 dB Gain) single-ended or balanced
Input impedance 150K ohms single-ended, 300K ohms balanced differential
Output taps  
Output regulation 0.05 dB 8 ohm load into open circuit
Overall negative feedback 12dB
Damping factor 200
Slew rate 15 volts/microsecond. (20% maximum duty cycle)
Rise time 2.0 microseconds
Hum & noise 500 microvolts RMS (96 dB below rated output IHF A-weighted)
Power supply energy storage 144,000 µF total
Power requirements 100-125VAC 60Hz (200-250VAC 50Hz) 380 watts at rated output (150WPC 8 ohms), 750 watts at 300WPC 4 ohms, 800 watts maximum, 40 watts idle.
Other Output polarity: Non-inverting from single-ended inputs. Balanced pin 2+ (IEC-268)
Output current: 20 amps peak at protective shutdown
12 VDC trigger and detachable AC power cord
Dimensions 19" 948 cm) W (standard rack panel) x 5.25" (13.3 cm) H x 14.25" (36.2 cm) D (front panel back). Optional handles extend 1.5" (3.8 cm) forward of the .25" thick front panel. Output connectors extend 0.9" behind rear panel.
Weight 30.3 lbs. (13.8 kg) Net; 43.3 lbs. (19.7 kg) Shipping.

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


After extensive development, we are happy to announce the availability of a new solid-state amplifier from Audio Research that combines high efficiency, musical sound and ample power - all at a very affordable price. The new 150.2 combines the groundbreaking Class T digital switching technology first used in the 150M multichannel amplifier with a fixed (non-modular) two-channel design in a package sized like the older 100.2 amplifier.

The 150.2 produces a strong 150 WPC into 8 ohms, and 300 WPC into 4 ohms. BAL and SE inputs are provided, along with a 12V trigger and detachable A.C. power cord. Like the 150M, the 150.2 produces very little heat because of its high efficiency, so it is ideal for in-cabinet installations. Handles are optional at additional cost, as on the 150M.

Musically, the 150.2 is very much like the remarkable 150M - very refined, open and natural. Some have described the 150M as having virtually no coloration of its own, so that it presents the source material with remarkable transparency and purity. We think the 150.2 is very similar in character, and is sure to find compatibility with a wide variety of loudspeaker types. This amplifies really sings with any Audio Research preamp!

The 150.2 is sure to create a secure, popular niche for itself in the Audio Research product line. It is an entry-level power amplifier with pedigreed performance and the stature of the Audio Research name.

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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