Our Audition Switches contain 4 TRS jacks as well as provide a 2.1mm power pass-thru jack! When nothing is plugged into the send/return jacks, your signal will pass through the Input and Output jacks unaffected. Whenever you're ready to try out a pedal, or drop a volume pedal into your signal loop, just plug into the Send/Return jacks and off you go!
The internal switches will slowly be removed or changed from this product as I rewire/redesign it, because there is no actual need for them in their current design. The jacks will connect TRS everywhere, even if you only use a mono cable (that just means the Ring is grounded)
*This does not actually NEED power, the 2.1mm power jacks are there simply as an easy way to have a pass-thru jack ready-to-go for the switch you're auditioning.