From Roll Music Systems
Roll Music Systems Inc introduces new RMS5A7 tube microphone preamplifier or "Tubule" in 500-series modular format.
Roll Music Systems, manufacturer of the popular RMS216 Folcrom passive summing device and the acclaimed RMS755 Super Stereo compressor, are set to release their next innovative new product.
With the explosion of new modular products for the 500-series frames sold by various manufacturers, user requests for a tube-based module have been met almost universally with claims by designers and engineers that it couldn't be done. Roll Music Systems has proven it can be done, and be done well.
The Tubule is a real transformer-coupled tube mike preamp, getting all its amplification from a standard dual triode tube. It uses sophisticated modern power management circuitry to generate the high-voltage plate supply and the high-current heater supply to power the tube. Careful design of this high-efficiency power management circuitry has allowed for a preamp that fits within the space and power consumption limitations of a single module.
The Tubule features switches for -20dB input pad, polarity inversion, and phantom power, a 12-position gain control switch that ranges from 33 to 66dB in 3dB steps, and a continuously-variable input attenuator that ranges from 0 to -10dB for very accurate gain settings that can be easily recalled.
Equivalent Input Noise (66dB gain, 150Ω source): -121dBu
Input Impedance: 1200Ω balanced
Recommended Source Impedance: 150Ω balanced
Maximum Input Level: +22dBu rms
Maximum Output Level: +25dBu rms
Output Impedance: <300Ω balanced
Recommended Load Impedance: >10kΩ balanced
Gain Range: 3dB steps, 33-66dB
Input Attenuator: Variable, -10 to 0dB
Input Pad: Switchable, -20dB
Frequency Response: +/-1dB, 10Hz-40kHz
Power Requirements
optional for optimal headroom:
+/-16V @ 0.100A
+48V @ 0.003A
Vacuum Tube: 12DW7 / ECC832 / 7247
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