Details

The new "Red Valve" series TB101 valve (12AX7) mic pre-amp is a single channel valve mic preamplifier that features switchable phantom power, phase reverse, -20dB Pad, optical compressor, and fully functional EQ all housed together in a single 1/2U rack mount sized chassis.

Tailored use in the home project studio, the "Red Valve" TB101 is perfectly suited for use as front end mic inputs for your digital recorder or any other application requiring mic preamplification. 

Features

• Hand tested 12AX7 tube
  
• CLASS A Transformless high voltage signal path
  
• Switchable Phantom Power
  
• Switchable Phase reversal
  
• Optical Compressor
  
• EQ circuitry
  
• Input gain control
  
• -20dB pad
  
• 110v-220v External power supply
  
• Size : 1/2U Rack

Specifications

• AUDIO INPUTS
  
• Mic input connector XLR balanced
  
• Impedance 3k Ohms
  
• Mic input gain 10dB to 60dB
  
• Phase reversal switchable
  
• Phantom power +48V, switchable
  
• Instrument input con. 1/4" jack unbalanced
  
• Instrument input gain 0dB to 45dB
  
• AUDIO OUTPUTS
  
• Connectors XLR & 1/4" jack
  
• Type Balanced & Unbalanced
  
• FREQUENCY RESPONSE
  
• Line in 6Hz to 20Hz within 1dB
  
• Mic in 8Hz to 20Hz within 2.5dB
  
• COMPRESSOR
  
• Photoresistive servo operated
  
• Ratio minimum 1.5 to 1
  
• Ratio maximum 10 to 1
  
• Attack time 1mS/5mS
  
• Release time 500mS/1500mS
  
• EQ
  
• Shelving high and low frequency controls 8kHz & 80Hz
  
• Mid frequency cut/boost control (1.8kHz)
  
• Cut boot level approx 16dB
  
• METERS
  
• LED -25dBu to + 18dBu
  
• PERFORMANCE
  
• THD (Unweighted) 0.05%
  
• Signal to noise >90dB
  
• Power supply rejection >98dB
  
• POWER SUPPLY
  
• Transformer External
  
• Input 17v AC

Manual