The Radial Engineering EXTC-500 Guitar Effects Studio Interface enables creatively inclined engineers to introduce guitar pedals into the signal chain. The EXTC Studio Interface takes a balanced signal, unbalances it and reduces the level so that it can properly interface with hi-Z guitar pedals. Once the signal is processed, this studio interface reverses the process by taking the unbalanced signal and reconverts it back to a +4 dB balanced line level signal for easy manipulation in the professional recording environment. This, for instance, lets you add wah to a kick drum, tube distortion to a vocal track, or maybe an old-school tape echo to an acoustic guitar. As pedals can be noisy, the EXTC Studio Interface is transformer isolated to eliminate hum and buzz caused by ground loops. A 180° polarity reverse ensures that the wet-dry mix is in phase.
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Description
Radial Engineering EXTC-500 Guitar Effects Studio InterfaceThe Radial Engineering EXTC 500 Guitar Effects Studio Interface enables creatively inclined engineers to introduce guitar pedals into the signal chain. The EXTC Studio Interface takes a balanced signal, unbalances it and reduces the level so that it can properly interface with hi Z guitar pedals. Once the signal is processed, this studio interface reverses the process by taking the unbalanced signal and reconverts it back to a +4 dB balanced line
100% discrete class-A signal path
Transformer isolated to eliminate noise
Separate send & receive level controls
Front panel ¼" jacks for easy connection
Lets you fatten up a track using pedals
Allows you to add guitar effects like overdrive to voice
Lets you use effect pedals in new ways
Creative tool to make your tracks stand out
Easy to use
Isolated output to eliminate ground loops
Wet-dry mix to adjust the balance
Can also be used for reamping
100% steel casing reduces magnetic interference from other nearby modules that may cause pollution
Adjusts the wet-dry mix between the original unprocessed signal and the EXTC's effects loop
Lets you reverse the polarity of the wet signal path and bring it into phase with the dry signal when they are being mixed together
Turns the Omniport insert jack into a second send & receive path for additional processing
For adjusting the send level to the pedals and return path level back into the EXTC to optimize the signal-to-noise ratio
Allows you to separate send and receive ¼" jacks used to connect guitar pedals to the EXTC. Front panel mounted to make connections easy for use on the desktop
TRS jack is set up as an insert to connect to a remote patch bay or effect device. This follows the tip-send, ring-receive convention. It is available when used with Radial Workhorse racks.
Double-sided and gold-plated edge connector ensures enhanced conductivity and signal transfer
Helps eliminate hum and buzz caused by ground loops
Radial's FET amplifier delivers natural tone and optimal signal transfer for high-impedance instruments and effects
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
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Product Reviews
★★★★★ 5
Cute and super convenient for travel
Color: Black
Really happy with this jewelry box overall. It’s compact, lightweight, and perfect for travel. The compartments are well designed for rings, earrings, and even long bracelets, which fit really nicely.
The only downside for me is the necklace section. When using multiple necklaces, they can get tangled, so it’s not the most practical part of the case. Other than that, it’s a great product for the price and looks very cute
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Nice gift!
Color: Black
I got this as a gift for a coworker and it was cute compact and of good quality. I love the earring compartment for her because she always wears earrings and she travels, I figured it would be a great thing for her to have.
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Reviewed in the United States on January 12, 2026
★★★★★ 3
Closing
Color: Pink
Hard to close while earrings are in the case. Decent size and easy to carry around. Good quality, looks good and helps me keep my jewelry organized.
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Reviewed in the United States on December 30, 2025
★★★★★ 5
Pretty Box
Color: Black
Nicely made for travel. Holds a lot of different kinds of jewelry. Good price, would buy again.
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Reviewed in the United States on March 28, 2026
★★★★★ 5
Gorgeous Tiffany-Blue & Perfect for Travel
I absolutely adore this little jewelry case. I don’t have a huge jewelry collection, so the size is perfect for me. It keeps everything organized without being bulky.
The zipper feels very sturdy and smooth — not flimsy at all.
And for anyone who loves Tiffany’s blue… the color is almost an exact match. I can set it next to my Tiffany box and it’s nearly identical. It’s such a pretty, luxe-looking shade.
Highly recommend.
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Reviewed in the United States on February 18, 2026