RUPERT NEVE DESIGNS / MBT : Master Bus Transformer

RUPERT NEVE DESIGNS/MBT: Master Bus Transformer is a master bus transformer designed for ideal transformations such as sweetening, strengthening, driving, and widening materials.

■Master bus transformer

～Specifications～
■Input impedance
10 kΩ
■When all functions are disabled
Noise (22 Hz to 22 kHz): -95 dBu or less
THD+N (0 dBu @ 1 kHz): 0.004% or less
THD+N (+20 dBu @ 1 kHz): 0.002% or less
Maximum input level: +25.5 dBu
Crosstalk @ 1 kHz: -95 dB or less
Frequency characteristics:
<5 Hz - 30 kHz +/- 0.1 dB
<5 Hz - 60 kHz +/- 0.25 dB
<5Hz - 180kHz -3dB
■When HPF is enabled
Noise (22 Hz to 22 kHz): -95 dBu or less
THD+N (+20 dBu @ 1 kHz): 0.002% or less

■ When equalizer is enabled
Noise (22 Hz to 22 kHz): -93 dBu or less
THD+N (+20 dBu @ 1 kHz): 0.002% or less

■ When compressor is enabled
Noise (22 Hz to 22 kHz): -92 dBu or less
THD+N (+20 dBu @ 1 kHz): 0.002% or less

■ When Width is enabled
Noise (22 Hz to 22 kHz): -88 dBu or less
THD+N (+20 dBu @ 1 kHz): 0.002% or less

■ When Silk is enabled
Noise (22 Hz to 22 kHz): -95 dBu or less
THD+N (+20 dBu @ 1 kHz): 0.003% or less

■ Others
External dimensions: 48.3 × 25.7 × 8.9 cm
Weight: 5.8 kg

Specifications are subject to change without notice.

～Front panel～
■INPUT LEVEL - Input level
Lights green when the input signal reaches -20 dBu, lights red when the input signal reaches +23 dBu. This indicator is located after the input trim controls.
■ INPUT TRIM - Input trim
31-step potentiometer that controls input level with +/- 12 dB range.
■HPF FREQ - HPF frequency
31-step potentiometer that controls HPF frequency from 15 Hz to 100 Hz.
■HPF IN - HPF switch
When pressed, it lights up green and enables a 6 dB/octave HPF.
■LF - LF gain
31-step potentiometer that controls the gain of the low frequency shelf within a +/- 9 dB range.
■LF FREQ - LF frequency
31-step potentiometer that controls the corner frequency of the low frequency shelf from 30 Hz to 240 Hz.
■HF - HF gain
31-step potentiometer that controls the gain of the high frequency shelf within a +/- 9 dB range.
■HF FREQ - HF frequency
31-step potentiometer that controls the corner frequency of the high shelf from 3 kHz to 24 kHz.
■EQ IN - EQ switch
When pressed, it lights up green and the EQ section is enabled.
■ THRESHOLD - Threshold
31-step potentiometer that controls the compressor threshold from +24 dBu to 0 dBu.
■S/C HPF - Sidechain High Pass Filter
A 31-step potentiometer that controls the corner frequency of the S/C HPF from 20 Hz to 350 Hz.
■COMP IN - Compressor switch
When pressed, it lights green and activates the Color Comp section.
■GAIN REDUCTION - Gain reduction
The LED lights green when gain reduction occurs.
■RELEASE - Release time
31-step potentiometer that controls the compressor release time from 100mS to 1.5S.
■RATIO - Ratio
Select the compressor ratio from LO (2:1) / HI (5:1).
■BLEND - Blend
31-step potentiometer that controls the amount of compressor signal in the audio path.
■GAIN - Gain
A 31-step potentiometer that controls the amount of compressor makeup gain from 0 dB to +20 dB.
■WIDTH IN - Width switch
When pressed, it lights up green and the Width section is enabled.
■WIDTH HPF - Width HPF frequency
Width 31-step potentiometer that controls the HPF corner frequency from 50 Hz to 800 Hz.
■WIDTH - Width
31-step potentiometer that controls the amount of stereo field processing.
■SILK IN - Silk Switch
When pressed, it lights up purple and the Super Silk section is enabled.
■BLUE - Silk Blue
A 31-step potentiometer that controls the amount of Silk Blue pre-emphasis applied to the low frequencies.
■ DRIVE - Drive
The LED lights red when the signal level reaches the optimum range for the transformer harmonics.
■ RED - Silk Red
A 31-step potentiometer that controls the amount of Silk Red pre-emphasis applied to the high frequencies.
■HARMONICS - Harmonics
31-step potentiometer that controls the amount of trans harmonic content added to the audio path.
■ ZENER DRIVE - Zener Drive Switch
When pressed, it lights up orange and the soft clip circuit is enabled.
■BYPASS ALL - All bypass switch
When pressed, it lights red and master bypass (hardwired bypass) is enabled.
■OUTPUT TRIM - Output trim
31-step potentiometer that controls the output trim amount within a +/- 12dB range.
■OUTPUT METERS - Output meters
Stereo 16-segment LED meter showing output level in dBu.
■POWER - Power supply
When the MBT is powered on, the LED lights green.

～Rear panel～
■POWER - Power supply
AC power inlet (100-240 VAC, 50/60 Hz) with integrated IEC power switch. Maximum power consumption is 70W.
■GROUND LIFT - Grand lift
Slide switch that separates XLR pin 1 from chassis ground.
■OUTPUT - Output
Balanced XLR output with custom Rupert Neve Designs transformer capable of up to +25.5 dBu @ 1 kHz.
■INPUT - input
Balanced XLR combo jack input with custom transformer by Rupert Neve Designs capable of up to +25.5 dBu @ 1 kHz.