Just plug it in and it works! You can also silence everything by hitting the button again. The switch is very well built, I expect it will last for years.

Huge fan of the Lehle 3@1. I just got it last week and used it on a gig yesterday where I was playing upright, electric, and synth basses. It worked flawlessly. I sent one output to my amp (which had a DI going to the house) and the other to my tuner. Super impressed!

I switch between 3 guitars for everything in our song catalog, so this selector is great for minimizing our transition times; no obnoxious pops or clicks or buzzes.

My only gripe is that it doesn't ship with the wall-wart power transformer and I had to go buy it separately.

Does what its supposed to do and feels like a quality item. I wish I would have got this along time ago, would have saved me space, time and money.

It's built like a tank, works perfectly, and has a few features that really set it apart for me. The mute, engaged by hitting the switch once more when on a specific channel, sends a direct signal to a tuner, which eliminates the tuner from the line signal. The action on the switches is buttery smooth, no clicks or hangups if you don't press it straight down like on some other pedals I have. The volume control on the A and B channels makes the balance of output with active and passive instruments very easy. It was the only pedal I could find that hit on all those points for playing with three different instruments. It's expensive yes, but when you get it, you will understand why.

This switcher is primo in quality as well as functionality, I only had it a week but you can tell when something is built to last. If you play multiple instruments in the same set this allows you to switch between instruments quickly and silently.

Works as advertised! Switching is completely silent! Good purchase!

It does its job exactly as expected. Silently. Love it! Plus, you can't beat different colored lights. Must always have many colored lights on stage.

High quality, very rugged, very quiet! Does everything I was hoping for.

Does exactly what it says… Allows you to plug three guitars into the same pedalboard signal pathway, and the trim pots allow you to establish unity gain across all three inputs. Best of all, the switching is perfectly silent.
My only slight critique. The 3 inputs enter the top of the box… so I've decided to mount the device on its side, hit the buttons vertically and let the input cables trail off the right side of my pedalboard.

This switchbox is excellent. It is silent switching from guitar to guitar. The indicator lights lets you know what instrument you are using (designated by channel A, B, or C). I have only had it for about a month now, but a really appreciate its rugged construction and simplicity of operation. The only knock that I have against it is the price. $300 plus for a switchbox, even of this quality, is a bit excessive. But, all the musical instrument sites that I check were selling it for the same price. If you want one, you may want to wait until one of the dealers are having a 10% or 15% sale and get it then. Andy Miller is a great rep. He always has great advice and info (he turned me on to the Lehle switcher) and he tries hard to satisfy with great equipment and match the very best price. I consider him to be my "personal" gear advisor. HE'S AWESOME! Give Sweetwater a call - ASK FOR ANDY MILLER!