Rolls MB15b Stereo Converter

MSRP: $90.00


Out of stock


The Rolls MB15b Stereo Converter converts consumer level stereo RCA signals to balanced XLR professional line level, and back. One side of the unit, labeled 1, has two XLR inputs and stereo RCA outputs. The other side, labeled 2, has stereo RCA inputs and two XLR outputs. Each side has stereo level controls, and a LED indicates that power is applied to the unit. An additional benefit of the MB15 is that it will act as a balanced XLR line level control. By adding a stereo pair jumper between the four RCA jacks (connecting ins to outs), the two level controls may be inserted into any balanced XLR line.

You need the Rolls MB15b if you interface consumer electronics such as computers, DJ equipment, iPads, or iPhones to a professional audio sound system. The MB15b will also convert balanced pro audio line level signals so you can send audio into consumer electronics for recording. The Rolls ProMatch Stereo Converter is a Swiss Army Knife of audio tools.

Rolls MB15b Converts Stereo RCA Signals to Stereo Balanced XLR LIne Level

  • Stereo Direct Box
  • Stereo RCA to stereo XLR
  • Stereo Level control for each channel
  • Works as stereo balanced line level control
  • 1/8” headphone level to line level adapter

Additional information

Weight2.5 lbs
Dimensions6 × 6 × 6 in


Max Out: Balanced: +18 dB, Unbalanced: +12 dB
Max In: Balanced: +22 dB, Unbalanced: +22 dB
Input Impedance: RCA : 100k Ohm, XLR: 10 k Ohm, 1/8” stereo: 10k Ohm
Output Impedance: RCA: 100 Ohm, XLR: 100 Ohm balanced
Noise Floor: -88 dB
Gain: +4 dB In: -8 dB, -10 dB In: + 20 dB
THD: .003%
Power: 12 VDC adapter (center negative)
Size: 4.15” x 2.46” x 1.55”
Weight: 1 lbs. (.45 Kg)
Current drain 16ma nominal no load 15vdc


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