EXTC™ Specifications

The EXTC is a guitar effects interface designed for use inside the Radial Workhorse and other API compatible rack 500 series systems. It features a balanced line level input with variable guitar level send & receive controls for hi-impedance guitar effects. Transformer isolation combined with class-A discreet electronics assures optimal signal transfer. This makes the EXTC the perfect interface for all kinds of effects that otherwise are difficult to use, cause noise or create unbearable hum.

EXTC Block Diagram

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Specifications are subject to change without notice.
*Refers to use with Radial Workhorse or other 500 series racks.
Circuit type: Solid state with transformer coupled effects loop
Power requirement: 60mA, ±16VDC
Output Gain: 12dB - send & receive at maximum
6dB - send minimum/receive maximum
0dB - send & receive set at 12 o’clock
  Dry Wet
Frequency Response: 20Hz ~ 20kHz ±1.5dB 20Hz ~ 10kHz ±3.5dB
(-8dB @ 20kHz)
THD+N: >0.005% 0dB output >0.002% 0dB output
Noise: -93dB -84dB
Intermodulation Distortion: >0.003% 0dBu input <0.02% 0dBu input
Maximum input: +26dBu +20dBu
Effects Loop i/o Send 1/4" output Receive 1/4" input
Connector: Unbalanced ¼" Unbalanced ¼"
Impedance: 1.5k Ohms 10K Ohms
Gain (Variable) From -14dB ~ +3dB
0dB at center point
From -99dB ~ +9dB
0dB at center point
Maximum Gain: ±3dB +9dB
Line level i/o Input Output
Connector*: Balanced XLR Female
Rear Panel
Balanced XLR Male
Rear Panel
Impedance: 15k Ohms 200 Ohms
Headroom:   +25dBu
Conditions: For indoor use at temperatures between +5° c and +40° c
Warranty: Radial 3-year, transferable
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