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The RMS5A7 Tubule from Roll Music Systems.
A real, transformer-coupled tube microphone preamplifier in the convenient
package you never thought possible.
At long last, all the warm sweet satisfaction of a
real transformer-coupled, high-voltage vacuum
tube microphone preamplifier in the convenient
and cost-effective 500-series modular format.
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. We took that as a dare. The result is not only a technological achievement, but a sonic masterstroke.
The RMS5A7 Tubule from Roll Music Systems combines the full-featured convenience of a modern mike preamp
module with the rich, satisfying sound of a transformer-coupled, all-tube preamp evocative of the elusive bygone
classics. This is not a wimpy starved-plate design, nor is it an op-amp based preamp with a tube stuck on top for
marketing appeal. It's all tubes and iron, with sophisticated modern power management circuitry to generate the
high-voltage plate supply and high-current heater supply to power the tube. Careful design of this high-efficiency
power circuit allows the Tubule to work within the space and power consumption limitations of a single module.
Robust transformer coupling and flexible, wide-ranging gain controls make the Tubule perfectly suited to everything
from low-output vintage ribbon mikes to the hottest modern condensers. The input pad, attenuator and gain control
also work together to provide a wide tonal variety. For the cleanest tones, keep the input attenuator up and the gain
control low. For more rich tube coloration, engage the input pad and turn the attenuator down in order to use a
higher gain setting without overloading the Tubule or other devices in the signal chain. The continuously-variable
input attenuator also allows for very accurate gain settings that can be easily recalled.
The RMS5A7 Tubule from Roll Music Systems is now a part of the VPR Alliance
. It has been independently confirmed to be fully compatible, both electrically and mechanically, with any enclosure that complies with the standards for the 500-series format.
The RMS5A7 Tubule from Roll Music Systems is available from our network of friendly, expert dealers for $975.
|Equivalent Input Noise (66dB gain, 150Ω source)
|Recommended Source Impedance
|Maximum Input Level
|Maximum Output Level
|Recommended Load Impedance
||3dB steps, 33-66dB
||Variable, -10 to 0dB
optional for optimal headroom
|+/-16V @ 0.100A
+48V @ 0.003A
||12DW7 / ECC832 / 7247