Nobsound 3-IN-1-OUT XLR Audio Switch, Balanced Audio Converter, 3-Way Stereo Passive Audio Selector Switcher (MC103 Pro 3-IN)

Product Information

And one last one to switch the incoming signal into my EQ (preamp signal VS. mono signal from pro tools (I run my mixes through the EQ) I could get a mic cord with a switch or something like the Hosa GMS-274 so she can turn her SM-55 on and off, but I read that the Hosa works by shorting XLR pin 2 to pin 3. No problem when you don't have 48V running between those pins, but I worry what will happen to the 48V power supply in my mixer if those pins get shorted. Or is that what the switch on the SM-58Ss is doing without me knowing it and I'm worrying about nothing? In summary, an XLR switch is the ideal way to connect multiple amplifiers to your DAC, and avoids potential issues associated with XLR splitters, or the inconvenience of moving cables yourself. The output impedance to input impedance ratio for the SU9 and 23R is 50:1, plenty! And for the SU9 and A90 it’s 10:1, so a little low but still fine. The MC103 comes in a ‘1-in, 3-out’ variant and a ‘3-in, 1-out’ variant. There is also an MC303 with a ‘3-in, 3-out’ configuration facilitated by two switches instead of one.

One to route the mono output of my preamp in 2 different directions (one going to EQ; one going to Apollo) I actually tested that a few months ago (though it was with 1/4 inch, not XLR) at a Toronto store called Saved By Technology, which sadly is no longer... but I digress. You might also want to take a look at our guides to the best cameras for streaming, the best cameras for vlogging and best microphones. The switch in each of these units changes the connection for the positive and negative XLR pins as you select the different input/output options, however the ground/shield pins are permanently bridged and are not affected by the switch.

Highest Quality Connections

In a heterogeneous audio environment, it’s often quite handy to mix RCA with XLR even if just for sonic comparisons.

The Douk/Nobsound MC-103 Pro does what you expect it to do: switch between three balanced inputs with essentially no degradation even when held up to the high standard of my audio analyzer. If you don't need gain/volume control or remote control, it would make a nice "pre-amp" replacement.

I attached an image which hopefully helps clarify what I'm going for. I'm hoping to find something with zero tone coloration and really good quality components. I've found these 2 options, but not sure if anyone can recommend something better suited for this: I run sound for a big band/swing band group with 2 vocalists. The vocalists each use a Shure SM-58S but they are not on stage all of the time; only 30% to 40% of our songs have vocals, so for a good portion of the show the mics are muted using their built-in switch. Now even though the Shures don't need it, phantom power is on because I also have a condenser mic on the piano. wondering if anyone has some advice on a high quality XLR a/b switcher for some simple studio routing. In my setup I need to be able to switch between the Gustard, the turntable and potentially a third XLR source. It would also be nice to have a pair of RCA inputs just in case. But it gets even more difficult since I also need to be able to toggle between two outputs. Those would be either my KGSSHV headphone amp or my Hypex nCore power amp. So there is 10 dB of bleed from one input to another. The still gives us signal to noise ratio of 124 dB which is well beyond any dynamic range we would require. If you don't want to see such a degradation, just don't activate the other inputs at full amplitude.

Measurement setup and device under test are running on regulated 230V power from a Furman SPR-16-EiFor instance, My Gustard X20 is internally fully balanced and so is my Hypex nCore power amplifier. When I added my newly built XONO phono preamp clone (which is also balanced by design) to the mix, I felt I was spending more time unplugging cables than actually listening to music. My problem was that I needed a super-flexible preamp with multiple XLR inputs. Unfortunately, even the most expensive ones from Burmester or Accuphase come with 1-2 inputs at best. And there was no way I wanted to spend that kind of crazy money. Many preamplifiers have inferior relay-based input selectors that can potentially degrade overall sound quality. By using a switch-box solution, you can entirely bypass those limitations.

The effective input impedance for the two when connected via a splitter is calculated using the same formula as two resistors in parallel: This gives us a result of 1666 Ohms! Lower than either of the two individually! This means that using a splitter in this setup, our impedance matching ratio would be less than ideal, even though either amplifier connected directly to the DAC would be fine.All this said, I'd still love to get my hands on one of those goldpoint boxes, if only because their stepped attenuators are gorgeous, but oh-my-god-that-price.