MCM Electronics

Mini Microphone Preamplifier By Stellar Labs (555-21010) MCM Part #555-21010

3.5 stars 2 reviews
MSRP: $44.99
You Save: $14.10 (31 %)
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Compact Single Channel Microphone Preamplifier
Compact preamplifier accepts balanced or unbalanced microphone input, and provides both balanced and unbalanced line level output. It is perfect in applications where a mixing console lacks sufficient mic inputs, or when a simple setup requires a single microphone to be connected to a amplifier's line input. The unbalanced mono output can also be used as a stereo headphone output.

Specifications Top

  • Balanced female XLR input
  • Unbalanced 1/4" input
  • Balanced male XLR output
  • Unbalanced 1/4" output, wired to provide mono signal to both sides of a stereo headphone
  • Selectable 36VDC phantom power
  • Rotary gain control
  • Power and clip LED indicators
  • Input impedance: 10KΩ
  • Max gain: 50dB (balanced), 44dB (unbalalanced)
  • Frequency response: 20Hz ~ 20KHz
  • THD: <0.01%
  • Requires 12VDC, AC adapter included
  • Dimensions (including knobs): 1-5/8" (H) x 4-1/2" (W) x 3-1/2" (D)
  • Weight: 12.3 oz.

Part Numbers
MCM Part #:555-21010
Stellar Labs Part #:555-21010
Package Specifications & Dimensions
Weight:1.5 lbs.
RoHS Comp:No
Warranty:90 days
Need to Return?
Length:9 in.
Width:5.75 in.
Height:3.75 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

Product Reviews Top

  • by

    on 7/17/2014

    Impressive value

    Overall: 4.5 out of 5

    I bought one of these for evaluation to see how they would work with our hydrophones. I can not testify to the reliability yet, but I am impressed with the quality of the build and even more so with the sound. The noise floor is very low and there is plenty of gain. I don't intend to make any performance measurements on this device but subjectively-speaking, it is much better than expected. I did open the box. Component quality is as expected and build quality looks good. If directly driving headphones, you get some high-pass filtering--I'm guessing around 70 Hz with my 32-ohm phones. There is not a ton of power or headroom, but again I think it is an excellent value. I feel comfortable referring our customers to it.

  • by

    on 6/12/2014

    Microphone preamp

    Overall: 2.5 out of 5

    I purchased 2 of these amps to use at a radio station.
    Both units failed within 6 days.
    Bench testing shows the op amp is defective in each one.
    Find something else to use.