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Stewart Audio PA 50B 50W Studio Power Amplifier

2-channel Power Amplifier, 50W RMS/ch at 4 Ohms, with Silent Cooling Design, Half-rack Spaced, Class AB, Barrier Strip Outputs
$706.00

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Stewart Audio PA 50B 50W Studio Power Amplifier
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$706.00
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Half-rack power!

Whether you are looking to power passive studio monitors, or other low-powered speakers, the Stewart PA-50B Power Amp will fulfill your needs. World-class reliability and clean full-range power will give you great sounding audio. At 25W per channel at 8 ohms, and 50W per channel at 4 Ohms, this half-rack sized amp is an excellent choice for your studio. The passive cooling design guarantees no fan noise will be present, unlike other amplifiers, keeping your mix sounding the best it can.

Stewart Audio PA 50B Features:
  • 2-ch
  • 25W/ch @ 8ohms
  • In: 2 x TRS
  • Out: barrier strip

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Tech Specs

  • Number of Channels: 2
  • Power Class: Class AB
  • Watts/Side @ 8 ohms: 25W
  • Watts/Side @ 4 ohms: 50W
  • Watts Bridged: 100W @ 8 ohms
  • Cooling System: Convection Cooled
  • Inputs: 2 x 1/4"
  • Outputs: Barrier Strip
  • Rack Spaces: Half (1U)
  • Height: 1.7"
  • Depth: 6.2"
  • Width: 8.2"
  • Weight: 3.5 lbs.
  • Manufacturer Part Number: PA50B

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Customer Reviews

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Rated 5/5

Still running all the Stewart Amps

These are great amps, all are still working, same as new.

Best:

JD Letson
Rated 3.5/5

Half Rack Stewart Audio amps

I am using the PA 50B to drive the compression horns in a multi-amped studio monitor/instrument speaker setup. I also have two of the PA 100B amps for the mid-bass (see my review on those). I am also pleased with this amp although it actually runs a little warmer to the touch than the PA 100B's. Also, there is a slight turn-on click when turning this amp on and off. It is not a big deal, but when it is only driving a compression horn that makes it more noticeable. The factory told me the the turn-on click is normal in the PA 50B and not in the PA 100B because the two amps have different turn-on delay schemes. The amps sounds great, runs cool, and takes up very little space.
Music background: Hobbyist musician and speaker builder.
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