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Alesis RA150 Stereo Power Amplifier - 45W per Channel into 8 Ohms

B&H # ALRA150 MFR # RA 150
Alesis RA150 Amplifier

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You Pay: $164.95

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Despite the increasing popularity of powered speakers, many speakers and headphones still require external amplification. The RA150 is designed to provide more power and better performance, at a lower overall cost per watt than the earlier RA100. As a result, it can more closely match the power needs of virtually any passive speaker or studio monitor, and provides a crisp, clean signal for outstanding performance and extended speaker life.

Designed for studio use, the RA150 amp incorporates advanced convection cooling for heat dissipation. The result is long, stable operation unaffected by heat-related complications, and without the added distraction and annoyance of fan cooling. This eliminates the frustration of trying to hear quieter details due to noisy amp performance.

Affordable power amp for project and commercial recording studios, broadcast and post-production control rooms
Cool, quiet operation (no fan)
Power Rating Stereo @ 4 ohms: 75 watts per channel RMS
Stereo @ 8 ohms: 45 watts per channel RMS
Bridged @ 8 ohms: 150 watts RMS
Damping Factor 200
Input Sensitivity +4dB for rated output
Input Impedance 10k ohm/20k ohm (unbalanced/balanced)
Gain Not specified by manufacturer
Frequency Response 10Hz to 70kHz
Signal-to-Noise Ratio >105dB
Total Harmonic Distortion (THD) Not specified by manufacturer
Input Connections 2 x 1/4" TRS, 2 x RCA coaxial
Output Connectors 2 x Pair binding posts
Controls Front Panel 2 x Rotary controls for gain
Power switch
Controls (Rear) Stereo/bridged mono switch
Indicators 1 x Clip/protect LED, 1 x Power LED per channel
Cooling Convection
Power Consumption Not specified by manufacturer
Dimensions 19" x 10 1/4" x 3 15/16"
Weight 15 lbs
Specialties Powerful performance at an affordable price
Alesis RA150 Stereo Power Amplifier - 45W per Channel into 8 Ohms
  • Power Cord
  • One Year Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    AlesisRA150 Amplifier
     
    4.8

    (based on 10 reviews)

    Ratings Distribution

    • 5 Stars

       

      (8)

    • 4 Stars

       

      (2)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Easy to set up (8)
    • Good power output (8)
    • Great sound quality (6)
    • Simple controls (6)

    Cons

      Best Uses

      • Basic systems (5)
      • Smaller rooms / apartments (5)
        • Reviewer Profile:
        • Pro audio / DJ / mixing (7), Tech savvy (5), Audiophile (3)
        • Was this a gift?:
        • No (9)

      Reviewed by 10 customers

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      Displaying reviews 1-10

      Back to top

       
      5.0

      Good, Clean Power

      By GearCat

      from Winfield, KS

      About Me Semi-pro

      Verified Buyer

      Pros

      • Accurate Controls
      • Appearance
      • Easy To Set Up
      • Energy Efficient
      • Good Power Output
      • Great Sound Quality
      • Quality For The Cost
      • Size

      Cons

        Best Uses

        • Basic Systems
        • Studio Power Amp

        Comments about Alesis RA150 Amplifier:

        I use this amp as my main power amp for my home studio. I run out of a Behringer FCA-1616 interface using balanced 1/4inch TRS patch cables. The amp powers two Alesis Monitor One MkII studio monitors. Unbelievable clean sound. I can't hear any coloration, distortion, even at higher levels. Not having a fan on the amp is a plus in my small environment where the noise would be picked up by the studio mic.

        • Was this a gift?:
        • No

        Share this review

         
        4.0

        Good Bang for the Buck

        By Sound Wright

        from New Port Richey FL

        About Me Audiophile, Pro Audio / DJ, Tech Savvy

        Verified Buyer

        Pros

        • Easy To Set Up
        • Good Power Output

        Cons

          Best Uses

          • Smaller Rooms

          Comments about Alesis RA150 Amplifier:

          I have a pair of near field monitors for a number of years that I wanted to used in my home studio. Other Amps I have (over 200 Watts/Channel was too much power and feared I would blow out the speakers one day. The Alesis had just enough power and all the features I needed to get them back into service. I have good experience with Alesis gear for over 20 years. If it was 1RU Size i would give it 5 stars

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          Great little amp

          By amped4media

          from Orlando FL

          About Me Pro Audio / DJ

          Verified Buyer

          Pros

          • Accurate Controls
          • Easy To Set Up
          • Good Power Output
          • Great Sound Quality

          Cons

            Best Uses

            • Multiple Rooms / Whole House

            Comments about Alesis RA150 Amplifier:

            Installed this in a doctors office for audio in waiting areas and massage. Great little unit!

            • Was this a gift?:
            • No

            Share this review

             
            5.0

            Great clean power and versatility

            By soundchaser

            from washington

            About Me Pro Audio / DJ

            Verified Buyer

            Pros

            • Easy To Set Up
            • Good Power Output
            • Great Sound Quality

            Cons

              Best Uses

              • Basic Systems
              • DJ / Mixing
              • Smaller Rooms

              Comments about Alesis RA150 Amplifier:

              works well in a studio environment

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              Silent and Clean

              By busterbs

              from Tampa, FL

              About Me Experienced

              Verified Buyer

              Pros

              • Easy To Use
              • Excellent Sound
              • Good Warmth

              Cons

                Best Uses

                • Video Sound Mixing

                Comments about Alesis RA150 Amplifier:

                Completely silent and drives the Alesis Monitor One MK2's perfectly.

                Share this review

                 
                5.0

                So far, It's working like a champ!

                By Chin

                from Los Angeles, CA

                About Me Pro Audio / DJ

                Verified Buyer

                Pros

                • Good Power Output

                Cons

                  Best Uses

                  • DJ / Mixing

                  Comments about Alesis RA150 Amplifier:

                  I use it for powering a pair of Yamaha NS-10's and its nice and powerful, good amp for the price.

                  • Was this a gift?:
                  • No

                  Share this review

                   
                  5.0

                  No problems

                  By FOZ

                  from Cambria, CA

                  About Me Audiophile, Movie Enthusiast, Pro Audio / DJ, Tech Savvy

                  Verified Buyer

                  Pros

                  • Accurate Controls
                  • Easy To Set Up
                  • Energy Efficient
                  • Great Sound Quality

                  Cons

                    Best Uses

                    • Basic Systems
                    • Smaller Rooms

                    Comments about Alesis RA150 Amplifier:

                    Both B&H and the Amp were simple to order and operate. The amp function as it should and is good for my Roland Piano and voice amplification uses for small audiences.

                    • Was this a gift?:
                    • No

                    Share this review

                     
                    4.0

                    They still make these?

                    By d10d3

                    from Salt Lake City, UT

                    About Me Audiophile, Pro Audio / DJ, Tech Savvy

                    Verified Buyer

                    Pros

                    • Accurate Controls
                    • Easy To Set Up
                    • Good Power Output

                    Cons

                      Best Uses

                      • Basic Systems
                      • Home Theater
                      • Larger Rooms
                      • Multiple Rooms / Whole House
                      • Smaller Rooms

                      Comments about Alesis RA150 Amplifier:

                      I have 3-4 of these for multiple studio monitors. We've had them for many, many years. When one goes out, I replace it with a new one. I'm surprised they even still make it to be quite honest. They aren't the greatest of all amps, but for the price, you can't really complain too much.

                      • Was this a gift?:
                      • No

                      Share this review

                       
                      5.0

                      As promised

                      By Station Master

                      from Newcastle, Maine

                      About Me Tech Savvy

                      Verified Reviewer

                      Pros

                      • Accurate Controls
                      • Easy To Set Up
                      • Good Power Output
                      • Great Sound Quality

                      Cons

                        Best Uses

                          Comments about Alesis RA150 Amplifier:

                          Used to power monitor speakers

                          • Was this a gift?:
                          • No

                          Share this review

                          (1 of 1 customers found this review helpful)

                           
                          5.0

                          Excellent for the money

                          By Andy

                          from Atlanta, GA

                          About Me Practical, Pro Audio / DJ, Tech Savvy

                          Verified Buyer

                          Pros

                          • Accurate Controls
                          • Easy To Set Up
                          • Good Power Output
                          • Great Sound Quality
                          • Price

                          Cons

                          • Limited Functions

                          Best Uses

                          • Basic Systems
                          • Smaller Rooms

                          Comments about Alesis RA150 Amplifier:

                          I really have absolutely nothing bad to say about this amp for the price. Powers a pair of Alesis Monitor One's beautifully. I really like the way this thing looks, personally. I was glad to discover it has very pronounced position clicks so you can make sure each channel is set identically. I would definitely recommend this amp for anyone on a budget needing something in this power range.

                          • Was this a gift?:
                          • No

                          Share this review

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