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BobWire XLR1 XLR and RCA Switcher Review

Rate this switcher:

  • 1. Poor (headless panther)

    Votes: 1 0.7%
  • 2. Not terrible (postman panther)

    Votes: 7 5.1%
  • 3. Fine (happy panther)

    Votes: 42 30.4%
  • 4. Great (golfing panther)

    Votes: 88 63.8%

  • Total voters
    138
Just plugged up the XLR-1 today and it’s amazing. I have a Denon X4800h and Eversolo DMP-A8. I had been running the rca out to Denon and I wasn’t Halle with the sound, as the Denon digitizes everything it touches. I now have the Denon out into the xlr1 rca, and xlr out of the A8 into xlr1. The sound is night and day with 2 channel music. Really happy with this product!
 
Hello Mort,

An RCA to XLR cable (adapter) will only be using a single "leg"(signal) of the balanced XLR cable. The XLR cable is intended to carry 2 "legs"(signals), each out of phase from each other. The use of 2 out of phase audio signals allows the noise picked up along the cable to be removed(rejected) at the end, inside the amplifier. This is called CMR (common mode rejection) and is the primary reason XLR/balanced connections are used.

If you used the RCA to XLR cable it would produce sound but you would be throwing away any advantage of a balanced cable. The BobWire XLR1 will take the RCA signal and convert it to balanced, using active phase inverters. This means the output of the XLR1 will be fully balanced and you can enjoy the advantage this brings as the signal travels to you amplifier.

The 2nd reason is just as drodgers suggests, you will not get the 6dB of gain that the balanced XLR connection provides. This means, if you are using an RCA to XLR cable, the audio level would drop 6dB when you try and listen to the source with othe RCA outputs.

As you mention, Amir found the SINAD was higher using the RCA input. This would be expected because the RCA input is going through the phase inverts to produce the true balanced signal. What you perhaps are not taking into account, is that if you use RCA to XLR cable, your amp is only "seeing" half the balanced signal. This totally removes the advantages of the balanced inputs on your amp. You will also need to turn your preamp/source up more to compensate for the 6dB lower signal(adding to the SINAD). So there is a give an take here but I believe the end result will be better using the phase inverters of the XLR1 rather than a RCA to XLR cable.

-Bob
Bob, does your post apply to THESE RCA>XLR cables as well or are these unique?

 
Based on the marketing of that cable, it looks promising. Now whether it does what it says it does is another question.
 
Based on the marketing of that cable, it looks promising. Now whether it does what it says it does is another question.
I use them going from Denon x3700 pre out to my pair of Apollon NCx500ST’s, pitch black.

I generally take Benchmark at their word, all of their products are extremely well reviewed and their philosophy seems solidly objectivist, I doubt they’d fib for the sake of marketing.
 
Would going RCA pre-out from avr to XLR1then out XLR to amp introduce any delay in the audio path? Assuming I’d need to do another audyssey measurement cycle to account for delay that would be introduced.

If there is delay, how much do you think it is?
 
No delay. Best use the RCA input and let Bobwire convert to XLR
 
Got it all setup with Bob’s help. I’m loving my setup now and my wife can actually use it without asking any questions. Haha

Anyway, I have a brand new SPK-1 that I no longer need. Selling for $225 plus shipping from Phoenix, AZ if anyone needs it. Currently, it’s $329 on Amazon. I bought the spk1 and the xlr1. No longer need spk1.
 
Does the RCA1 have the same penalty as the RCA inputs on the XLR1 ie the THD+N is 0.001% (95dB), shown in Amir's testing ? I have the Denon avr-x4800h, which doesn't have XLR outputs.
 
Does the RCA1 have the same penalty as the RCA inputs on the XLR1 ie the THD+N is 0.001% (95dB), shown in Amir's testing ? I have the Denon avr-x4800h, which doesn't have XLR outputs.
The xlr1 has been great for me. I recommend!
 
I’m planning on getting the speaker wire version of this. Does anyone know if a load is provided for the amp that’s switched off to prevent tube amp damage? Thanks!
 
Hello @BobWire ,

I read the manual, I’m looking for a device for professional use such as the XLR1. I think it’s kind of close to what I’m looking for but please give me your opinion.

My goal is to have 1 or 2 devices to switch at the same time 2 stereo outputs to 2 stereo inputs over a single audio bus, creating 2 sub buses (A and B) to do comparisons for the audio processors that could be connected through A and B by the touch of a button. So what it’s in my mind is to use 2 devices such as the XLR1. The first device receives the audio bus in its “output” and would be controlled by a 12v trigger, then we have here outputs A and B that connect to inputs A and B on the second XLR1, then the second XLR1 sends the audio bus signal from the output. I can make them switch both using the 12v trigger signal of course and would be using a simple button that allows passing or interrupting a 12vdc signal. Of course I didn’t mention any other devices that could be connected between bus A and bus B of both XLR1, but I believe is already implicit.

Now after flying a little let’s get to the ground. I believe it’s a little overkill but the quality is there. Would it be as fast switching that I would hear no interruption when switching from A to B or viceversa and be able to perceive changing nuances between A and B, and of course have the same switching speed from B to A? This is for monitoring purposes, not for recording.

After imaging such solution, I thought also that what I wanted was a switching scenario where I wouldn’t had to use the 12v triggers and better use the audio sensing feature, but then I realized it would maybe work when switching from A to B and not from B to A. That is because I wanted to do the switching from a monitor controller that has no 12vdc trigger outputs, even though the XLR1 just have 1 trigger input for B input.

So far I haven’t found a single device that would allow me to do that, even if I have to patch some stereo outputs to other stereo inputs. I have found cheaper devices that works with the click on an IR remote controller, by putting them together so that both receive the same IR signal at the same time and switch simultaneously. I have found such devices even with 1 to 5 /5 to 1 so I could even build 5 sub buses, but that’s overkill now and of course I don’t know about the speed and the quality of such devices, not even if I would be able to do an uninterrupted comparison when switching from A to B and viceversa, furthermore there is no Bob.

So what do I want? I would like to know at least if such setup with 2 XLR1 devices would switch as fast from A to B and B to A using a 12v shared trigger and without interruption of the audio that can be heard.

Now please keep reading if you like as I’m going to fly high. What about some additional features on a future revision of the product? Like having a second sensing circuit that could also allow to instantly switch from B to A, and not just from A to B, of course I know there’s the issue of what happens with the delay if used as a 2 to 1 device and there is an audio signal on both inputs, but surely some logic could be built for such scenario to protect the final behavior from switching non stop between both inputs. Even cooler, to have a 12v trigger generator outputs for A and B (and maybe C) so that if it’s connected to a second XLR1 for such “bus scenario”, then this triggered 12v signals could be connected to the corresponding trigger inputs on a second XLR switcher working as a many to 1 switcher. The first XLR switcher won’t receive a master 12v trigger (on A or B or C), but could be optional.

I know I know, the XLR1 is meant for home AV setups and that’s maybe why there is only a 1 priority channel (B), and adding so much hassle could result in confusion, but common, we already using such a device like the XLR1? I believe folks using it are already very capable of interconnecting stuff and it could be expanded from just AV home usage to also professional areas and creative setups. What about more outputs? (A, B, C, D,…). What about a remote controller for the master XLR switcher?

I’m just starting and have already a home studio with an acoustic treated room, but who knows if my idea could interest to someone connecting a lot of expensive stuff and add such implementation to a patch bay? Maybe there are mixer consoles that could do that switching as simple as I believe or simply mixers with alternative outputs and not just a main output, but hey! What about people on a home studio with such a need? What about people on a big AV home room having different speakers, amplifiers, etc? It could simplify be possible to switch quickly from setup A to setup B and viceversa with the touch of a button in a remote controller for 1 good set of speakers; and maybe a third Bobwire XLR switcher to pass that flavored treated bus signal to a speaker switcher also triggered instantly to the desired speaker or be able to select the desired speaker with another remote controller (that won’t interfere with other Bobwire XLR switchers). Hey, that gives me the idea that if a remote controller could exist, it could be programmed for an IR Channel that would only activate the BobWire XLR meant to switch.

Thank you for reading Bob, and to anyone else too.
Best regards!
 
Newbie here. I joined because I stumbled upon the Bobwire RCA1 and this thread and really see it as a great idea. Mine arrives today.

Just the point of clarity that was confusing me with how I would use this device. Not sure why I got stuck on this but I think I'll be fine using the Bobwire RCA1. Just want to share it in case somebody else struggles with the same thought.

The home theater is an Anthem MRX710 left right center, preamps fed to an external B&K amp, with the subs being fed high level from the amp left and right. I have a new Eversolo T8 streamer and Z10 DAC, and don't want to send the preamplified signal from the Z10 outputs to the mrx-710 AVR, as it will digitize the analog signal, then perform another digital to analog conversion (can't be bypassed). So this is a typical perfect use case of the Bobwire RCA1 I gathered. The Eversolo Z10 DAC does not have a dedicated sub out, so I don't have to change my subwoofer setup configuration using high level connection of the subwoofer to the amplifier.

I got hung up with the following: I can easily bypass the left and right with the Bobwire RCA1, but what about the center channel? Does the center channel remain connected from the MRX710 to the amp? If so, my center channel sound would still play even if the RCA 1 was triggered to play the Eversolo streaming device? I thought that I could get around it but just simply muting the Anthem MRX 710 which was another step I didn't want to have to do but could live with. I read about voltages of left and right speakers versus subwoofers and that they were different, so I did not think I could use the subwoofer inputs and outputs of the Bobwire RCA1 to control the center channel. I finally read last night that the four inputs of the Bobwire RCA can be used interchangeably for left and right or sub. This makes sense as it's probably just relay that makes a contact that passes the preamplified signal through. But somehow the labeling on the RCA1 inputs/outputs that said "sub" confused me into thinking it was dedicated for subwoofers ONLY. I imagine Bob's marketing department if this had been a larger company fighting over how to label these because you're going to confuse your customers. (based on their market feedback, of course). Would the marketing department simply wanted things labeled input1 input2 input3 input4, similarly for outputs?

So I believe the RCA1 will work perfectly for my use case, with the input Bank 1 hooked to left right and center, using one of the Sub inputs for the center channel. On the output Bank, the subwoofer output would simply connect the center channel to the amp. Input bank 2 would be used for my streamer and be connected to left and right pre amplified signals, and the sub inputs would be empty.

I'll find out today if this will work. It seems like it will, but I was in a rat hole of thought for a couple days. Seems like a really great product, and filled a niche. With the quality described by the members here, the price seems reasonable for a small company making its way. Happy to support innovation. Everything doesn't have to be nickeled and dimed to death.

I just wanted to share my journey with this device so far. It is also validating to see others who reach the same conclusion, they needed to bypass their home theater for their love of stereo streaming.

I'll report back how it works or if I fry a component.
 
I love this product even though I don't use it anymore.

This will almost certainly work. Center and sub are interchangeable.
 
Got it all setup with Bob’s help. I’m loving my setup now and my wife can actually use it without asking any questions. Haha

Anyway, I have a brand new SPK-1 that I no longer need. Selling for $225 plus shipping from Phoenix, AZ if anyone needs it. Currently, it’s $329 on Amazon. I bought the spk1 and the xlr1. No longer need spk1.
This has been sold
 
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