Rolls RM83T 8 Channel Transformer Balanced Microphone Mixer


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About Rolls RM83T

The Rolls RM83t is an eight channel mixer in a single rack space intended for a variety of sound reinforcement applications including board rooms, churches, mixing console expansion etc. Virtually any application where up to eight microphones need to be mixed together and space is limited, is met by the RM83t.

Each of the eight channels has a transformer balanced XLR microphone input, as well as a 1/4" unbalanced input. The 1/4" jacks may be internally reconfigured to become channel Inserts or Direct Outputs. Inserts provide a way to get each individual channel signal in and out of the RM83t mainly for processing purposes.

A Direct Output is simply taking the signal from the channel only. Each channel has individually switchable +48 VDC phantom power. The RCA Prefade (pre Master Level) Output may be connected to the RCA Aux Buss Input for cascading two RM83t units together. This Output may also be used for recording purposes and the Aux Buss Input. The Main output for the RM83t is a balanced male XLR jack. This output has a switch for Line or Mic level output.

Rolls RM83T Features

  • Eight transformer balanced XLR microphone inputs
  • Tone controls (treble/bass cut)
  • Individually switchable +48 VDC phantom power
  • Eight 1/4" unbalanced inputs, each may be internally jumpered to become an Insert or a Direct Output
  • RCA Prefader (pre Master Vol.) Output for recording, monitoring or cascading
  • RCA Aux Buss Input for cascading, or as a ninth unbalanced input
  • Mic or Line output level

Rolls RM83T Specifications

Input Impedance
Mic: 600 ohms XLR balanced
1/4": 10K ohms unbalanced
Bus Input: 10K ohms unbalanced
Max Input Level
Mic: +4 dBV balanced
Line: +22 dBV
Input Connectors
8: XLR, 8: 1/4" (Line), 1: RCA (Bus input)
XLR bal., RCA unbalanced Prefade
Max Gain
Mic: 60 dB
Line: 35 dB
Tone Control
12 dB Treble/Bass cut
Phantom Power
+48 VDC
Output Level
+22 dBV max
Output Impedance
51 ohms
Phase Shift
<10 degrees, 20Hz-20 kHz
Max S/N ratio
106 dB
>120 dB (Mic)
19" x 1.75" x 6" / 48.3 x 4.5 x 15 cm
6 lbs / 2.72 kg
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