Radial EXTC - 500 Series, Balanced Interface for Guitar Effects Pedals
Radial EXTC-500, 500 Series Guitar Effects Interface with Transformer Isolated Send, 100% discrete class-A signal path
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Guitar Effects Interface & Reamp Module
Radial - 'EXTC 500'

500 Series Guitar Effects Interface
with Transformer Isolated SendRadial’s ‘EXTC-500’ Guitar Effects Studio Interface is here to enable creatively minded engineers to introduce guitar effects pedals into the signal chain. EXTC-500 takes a balanced signal, unbalances it and brings the level down so it’s able to correctly interface with Hi-Z guitar pedals.
Once this signal is processed, the EXTC-500 reverses this process by taking the unbalanced signal and then reconverts its back to a +4dB balanced line level signal for simple manipulation in the professional studio environment. This for example, allows you to add wah to a kick drum, tube distortion to a vocal track, or even an old-school tape echo to an acoustic guitar! As pedals can often be found to be quite noisy, the EXTC-500 is transformer isolated to limit hum and buzz commonly caused by ground loops.
at a glance
• Simple stereo TRS to dual-mono TS splitter / combiner for pedal boards
• Practical routing solution for use with stereo pedalboards and setups
• Passive electronics – no power needed!
• 2 x TRS to dual TS jacks
Reamp Any Track Through Your Pedalboard!

class-A bufferThe EXTC-500 is a 500 series module that allows you to get creative with your effects pedals, using them in your mix on any recorded track. Add a touch of distortion or chorus to a lead vocal, flange on a violin, or fuzz on piano - the possibilities are endless.
The EXTC-500 takes the line level balanced output of your recording interface and converts it so an instrument level high-Z output optimized for guitar effects pedals, so you can Reamp any track through your pedalboard with ease. Once you've run the signal through your pedals, connect the output back into the EXTC and it will boost it up to a balanced line level so you can connect directly to the input of your recording interface.
The EXTC features Radial's class-A buffer for the best audio quality and transformer isolation to eliminate any buzz or hum - so you can focus your attention on using your pedals in new and exciting applications.
EXTC-500 Applications

Reamping through pedalsTake a dry track, send it to the EXTC which in turn feeds your pedals. This is the perfect way to add some extra zest to a vocal track; an envelope follower to a kick; or some wah to that Hammond.

Adding Growl to a VocalPlug your mic into the PowerPre and send the signal into the EXTC. From there, you add an effect like a Tonebone Trimode using the blend control to mix in just the right amount of distortion.

Recording DirectPlug your guitar or bass into the JDVPre and have it feed the EXTC where you can send the signal through your pedals. Then bring the signal back through the JDX to emulate a speaker cabinet.
Radial EXTC - Demo with Joe Chiccacelli
Joe Chiccarelli walks us through a session recording guitar with the Workhorse 500 series frame and mixer. He uses the Radial PowerPre, EXTC, and Komit modules in the session.
Joe Chiccarelli is an American music producer, mixer and engineer who has been active since early '80's. He has produced albums by Bon Jovi, Frank Zappa, Tori Amos, Chicago, Poco, Bob Seger, Annie Lennox. He also engineered The Raconteurs "Consolers of The Lonely" for which he received his eighth Grammy award, for Best Engineered Album of 2008.

The Tech Spec
Features | Specification | Audio circuit type | Solid state with transformer coupled effects loop |
---|---|
Frequency response | Dry: 10Hz ~ 21kHz 0dBu, -3dBu | Wet: 10Hz ~ 21kHz 0dBu, -3dBu |
Dynamic range | Dry: 94dB | Wet: >99dB |
Gain | Dry: +5dB | Wet: +27dB |
Total harmonic distortion | Dry: <0.0006% 0dBu output | Wet: <0.0012% 0dB output |
Intermodulation Distortion | Dry: -117dBu | Wet: -110dBu |
Signal to Noise | Dry: 94dB | Wet: >99dB |
Maximum Input | Dry: +26dBu | Wet: +20dBu |
Data Compression | 60mA, +/-16VDC |
Input Connectors | 1/4", XLR |
Output Connectors | 1/4", XLR |