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Alesis RA150

Item ID: RA150

2 x 75W at 4 Ohms, 2 x 45W at 8 Ohms, Stereo Studio Reference Amplifier with Advanced Convection Cooling System

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From Our Research Team:

Serious Studio Bang for Not-so-serious Buck!

Choosing the Alesis RA150 Class AB reference amplifier for your studio is choosing quiet, efficient, and cool-operating power. Ready to stand up to the most professional of studio needs, the affordable 2RU Alesis RA150 reference amplifier sports advanced convection cooling, which delivers exceptional heat dissipation - without the noise of fan-cooling. There are also RCA and 1/4" TRS inputs, so you can power whatever you need - your studio monitors, your headphones system, or home theater - with the Alesis RA150.

Alesis RA150 Class AB Reference Amplifier at a Glance:
  • Delivers quiet, efficient, and cool-operating power
  • Outstanding heat dissipation - devoid of the noise of fan-cooling
  • Offers you great performance, at an excellent cost-per-watt value

Delivers quiet, efficient, and cool-operating power
The Alesis RA150 Class AB power amplifier - a member of Alesis's RA "Reference Amplifier" series - brings quiet, efficient, and cool-operating power to any demanding studio environment. Plus, it's stylishly designed and attractively priced, to give you a surprising value. The RA140 power amplifier offers 75W RMS at 4 ohms per channel, 45W RMS at 8 ohms per channel, and 150W RMS at 8 ohms bridged.

Outstanding heat dissipation - devoid of the noise of fan-cooling
Purpose-designed for studio use, the RA150 reference amplifier features advanced convection cooling. This system delivers outstanding heat dissipation, for long, stable operation - unaffected by typical heat-related complications, and devoid of the noise of fan cooling. The Alesis RA150 is perfect for the studio environment.

Offers you great performance, at an excellent cost-per-watt value
Whether you need to power your studio monitors, your home theater, or your headphones system, you can count on the Alesis RA150. This reference amplifier is a true performer, giving you a lot of wattage for its reasonable price.

Alesis RA150 Class AB Reference Amplifier Features:
  • Class AB power amplifier, designed for use in studios
  • Dissipates heat through advanced convection, so there's no fan noise
  • Features easy-to-access, front-panel volume controls
  • Delivers serious bang for the buck from a cost-per-watt standpoint

Alesis RA150 Class AB Power Amplifier Specifications:
  • 4 ohms, per channel: 75W RMS
  • 8 ohms, per channel: 45W RMS
  • 8 ohms, bridged: 150W RMS
  • Inputs: RCA, 1/4" TRS
  • Signal-to-noise Ratio: >105dB, 22Hz-22kHz bandwidth referenced to rated output
  • Frequency Response: 10Hz-70kHz, +0, -3dB
  • Damping Factor: 200
  • Input Sensitivity: +4dBU (1.23 V) for rated output with input control at maximum
  • Maximum Input Level: +26dBu
  • Input Impedance: 20 k-ohms, balanced, 10 k-ohms unbalanced
  • Crosstalk: -85dB, 1kHz
  • Output offset: +/- 50mV, Servo controlled
  • 2 RU (Rack Units)
  • Weight: 15 lbs.

The Alesis RA150 is purpose-designed for the studio - and gives you a lot of bang for the buck!
Specification Detail
Number of Channels 2
Watts/Side @ 8 ohms 45W RMS
Watts/Side @ 4 ohms 75W RMS
Watts Bridged 150W RMS @ 8 ohms
Cooling System Convection Cooled
DSP No
Filters No
Inputs 2 x 1/4" (Balanced), 2 x RCA
Outputs 2 x Binding Posts
Rack Spaces 2U
Height 3.5"
Depth 10.25"
Width 19"
Weight 15 lbs.
Manufacturer Part Number RA150

RA150 Image Gallery

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Reviews

based on 12 reviews

Alesis RA150

by John Shoemaker from Watkins Glen, NY
April 9, 2013
Music Background: I have been a Blues/ock guitarist since 1966 and I've been recording since 2001
This is a great little amplifier. I use it in my studio for monitoring recordings and playback. No noise and great power. This is my second one, the first one got in 2008

Twelve Years & Still Going Strong

by Studio Guy from Rocky Mountains, Northern Colorado
January 9, 2013
Music Background: Live Sound, Recording Engineer, Mix Engineer
I've used an RA150 in my studio for over 12 years driving a pair of Alesis Monitor Ones and a pair of Yamaha NS10M Studio speakers (not at the same time!) and it has performed extremely well. Very lo... read more [+]w residual noise, low stand-by power consumption, and plenty of power if I need 100 dB (which I do not suggest and rarely do).

Great design that has stood the test of time. close [-]

Alesis RA150

by Ron Fields from Schaumburg, IL
October 6, 2011
Music Background: Bassist, keyboards, Trumpeter,Vocalist,and songwriter
excellent fidelity through my 11 year ole Event20/20's should's bought this YEARS ago!! Clean crisp Exact!!

Exactly what I need

by Gary from Kansas City, Mo
March 6, 2013
Music Background: hobbyist
Perfect for my little studio. No bells and whistles....pure, quiet amplification.....flat response that doesn't complicate things any more than they already are....only wish it had a headphone jack, b... read more [+]ut most everything else has one, so it's no big deal.... close [-]

Reference Amplifier Alesis RA150

by J. Gilson from Fort Lauderdale, FL
January 2, 2013
Music Background: Pro Musician, live and studio work, songwriter
Fantastic amp, so clean, no hum at full volume. I drive my Alesis Monitor One Mk2's with this and it's the perfect amount of power.
Read more reviews

These people absolutely do the best job of anyone I've ever dealt with online. I highly recommend Sweetwater Sound to anyone needing anything pertaining to music. They are very helpful with what you need and I had my order in hand in two days!


Carter, Mattaponi, VA

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See Also: Monitor Amps , Alesis , Alesis Monitor Amplifiers , Alesis 2-Channel Amplifiers

Alesis RA150

Today's Payment: $76.33
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