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.
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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]
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Product Reviews
★★★★★ 5
Shirt worth buying several times
Size: XX-Large, Color: Anthracite Polo Stripe
Purchased another of same order and have found them to be excellent. Comfort, sizing, and quality. Can be dressed up or dressed down and they look great either way.
Worn in very hot weather and have not been oppressed by sweat. Nice. Will be purchasing more. Sizing was great. Loose and long enough to land just right over pants pocket top.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Great Quality and Comfortable Fit
Size: Large, Color: Washed Blue
I picked up the Amazon Essentials Men’s Golf Polo Shirt, and I’m really impressed. The fabric is soft, breathable, and lightweight — perfect for hot days on the golf course or casual wear.
The fit is spot-on, not too tight or too loose, and it looks sharp tucked in or out. It’s held up well after multiple washes without shrinking or losing shape. For the price, it’s excellent quality and a great value.
If you need a reliable, comfortable polo for sports or everyday wear, this one is a solid choice. Highly recommend!
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Reviewed in the United States on September 5, 2025
★★★★★ 4
Good quality, but runs a bit short
Size: X-Large, Color: Light Grey Heather
Overall, this is a solid polo for the price. The fabric quality is better than expected, with a nice balance of softness and durability. It’s not paper-thin, but not heavy either, and it does a good job wicking moisture and drying quickly, which is exactly what you want from a golf-style shirt. Functionally, it works well for casual wear, work, or being mildly athletic without committing to actual exercise.
Sizing is mostly on point, and I didn't notice any shrinkage after washing, but I always make sure to air dry this type of material and not throw it in the dryer. My only real gripe is the length. It feels like the shirt should be about 1–2 inches longer. If you raise your arms, people may catch a glimpse of your six-pack (hopefully), and if you bend over… well, let’s just say you'll want to be mindful of who's behind you. If Amazon fixed the length, this would be an easy five-star staple.
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Reviewed in the United States on December 12, 2025
★★★★★ 5
Love these golf shirts
Size: X-Large, Color: Grey Paint
We've bought several of these golf shirts and my husband really loves them! They are good at wicking away sweat, they fit great, are easy to care for and are well made.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Well made
Size: XX-Large, Color: Dark Burgundy
Very nice golf shirt, well made, perfect size, no shrinkage (washed in cold water), the shirt moves with your body ( a good thing), the shirt is worth the money.
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Reviewed in the United States on April 11, 2026