Radial Engineering EXTC-SA Guitar Effects Reamp Interface

Radial Engineering EXTC-SA Guitar Effects Reamp Interface

In stock

Radial Engineering EXTC-SA features a +4dB balanced XLR input that feeds two effects loops with ¼” jacks. These are arranged in series to allow the engineer to set up two different pedal chains. These can be used individually or combined together. Two front panel bypass switches allow the user to compare the wet and dry effects. Signal levels are adjusted via front panel send & receive control dials to optimize signal-to-noise and minimize distortion. To further reduce hum and buzz caused by ground loops, the effects loop circuit is transformer isolated. A wet-dry blend control lets you mix in the desired amount of effect while retaining the original dry signal. This is supplemented with a 180 degree polarity invert switch to realign the phase of the wet signal should it be reversed. Once processed, the EXTC-SA re-balances the signal and sends it to the XLR output.

To retain the signal integrity, the EXTC-SA employs full size, 100% discrete hand inserted parts for optimal signal transfer. The circuit itself is pure class-A following Radial’s award winning circuit topology. Made entirely in Canada, the mechanical design follows the Radial tradition whereby 14 gauge steel is employed throughout. An internal I-beam frame eliminates outside stress that could cause the circuit board to torque which could lead to premature part failure. Front panel controls and switches are further protected with a book-end cover that keeps them out of harm’s way.


Balanced interface for guitar effects pedals

Separate send & receive controls optimize signal path

Transformer isolation helps eliminate ground loops

Creative tool helps your mix stand out from the rest


Circuit Type: Solid state with transformer-coupled effects loop

Power Requirement: 60 mA, ±16 VDC

Output Gain:

12 dB – send & receive at maximum
6 dB – send minimum/receive maximum
0 dB – send & receive set at 12 o’clock

Frequency Response:
Dry: 20 Hz to 20 kHz, ±1.5 dB
Wet: 20 Hz to 10 kHz, ±3.5 dB (-8 dB @ 20 kHz)

THD + N:
Dry: >0.005% 0 dB output
Wet: >0.002% 0 dB output

Dry: -93 dB
Wet: -84 dB

Intermodulation Distortion:
Dry: >0.003% 0 dBu input
Wet: <0.02% 0 dBu input

Maximum Input:
Dry: +26 dBu
Wet: +20 dBu

Effects Loop:

Send 1/4″ Output:
Connector: Unbalanced 1/4″
Impedance: 1.5 kΩ
Gain (Variable): From -14 dB to +3 dB
0 dB at center point
Maximum Gain: ±3 dB
Receive 1/4″ Input:
Connector: Unbalanced 1/4″
Impedance: 10 kΩ
Gain (Variable): From -99 dB to +9 dB
0 dB at center point
Maximum Gain: +9 dB

Line In/Out:
Connector: Balanced XLR Female
Rear Panel
Impedance: 15 kΩ
Connector: Balanced XLR Male
Rear Panel
Impedance: 200 Ω
Headroom: +25 dBu

Dimensions (LxWxH): 5.84 x 4.81 x 1.98″ (14.83 x 12.21 x 5.02 cm)

Weight: 2.3 lb (1.0 kg)

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