Testing the Xvive A58 Guitar Wireless System

[AlbertA]

Xvive A58 Guitar Wireless System – Plug & Play Wireless Freedom

Xvive's A58 Guitar Wireless System offers crystal-clear tone, ultra-low latency, and plug-and-play setup. Enjoy wireless perfection for guitar or bass!

xvive.com

Unlike Lekato, Xvive actually quotes the max input level, which is good.

These are some of the specifications advertised:

• 5ms latency
• 2.84 Vp-p (~2.24 dBu) in "Passive mode" - There's an "Active Mode" that claims 7.5 Vp-p (~10.7dBu) with a vague "volume -10dB" line (I guess a -10dB input pad)
• 5 hours of battery life
• THD: 0.1%
• 110dB SNR

Lets put it to the test.

Legend: Yellow traces are the signal at the transmitter, Purple is the signal at the receiver.

Passive Mode

I was able to input a 3Vp-p 1KHz sine (~2.7dBu) signal before it starts clipping, so within spec.

"Active" Mode

In this mode, I was able to input a 7.78 Vp-p (11dBu) 1KHz sine wave, again within spec.
And confirmed there is an input pad, which I measured to be about -8.6dB in my case

Latency

I measured around 4.8ms - so also within spec.

 

[AlbertA]

Battery Life
On a full charge, sending a 1Khz sine wave, I was able to get around 7h:05m:59s out of the system - well above the 5 hours time specified.

 

[AlbertA]

Noise And Distortion

I'm using a Motu M2 interface to get a rough measure of what the noise and distortion performance of the Xvive A58 is.
For reference, this is how the Motu performs with a loopback cable, using the unbalanced output at a level that I will use to test the A58 (i.e. below clipping in "Passive" mode)

Motu M2 - Loopback cable​

And here's using the A58 in place of the cable:

Motu M2 - Xvive A58 loopback​

So the noise floor was raised 21.3 dB, THD increased about 6dB, certainly within the quoted 0.1%
However, given the raise in noise floor I measured, I'm not sure how they claim to achieve 110dB SNR.

 

[yek]

I used their U4 IEM system. Very handy, even though it's mono.

 

[Lysander]

Great review, as always!

Looks like a pretty competent wireless for ~$150.

 

[AlbertA]

Frequency Response

As flat or better than whatever this is:

 

[Baba]

Battery Life
On a full charge, sending a 1Khz sine wave, I was able to get around 7h:05m:59s out of the system - well above the 5 hours time specified.

View attachment 50519

Wait, how the fuck does this work?

 

[ian_dissonance]

Wait, how the fuck does this work?

It looks like he left it sending a signal and checked the DAW time when the signal stopped.

 

[AlbertA]

It looks like he left it sending a signal and checked the DAW time when the signal stopped.

That’s exactly what I did.

 

[Baba]

It looks like he left it sending a signal and checked the DAW time when the signal stopped.

That’s exactly what I did.

I was guessing that, but I wasn't sure if there was some other scientific way of testing that I didn't know about.

 

[DrewJD82]

Great review!!!

I wonder if we should have a sub that just has reviews/technical info like this? Just the single reviews/info, not for discussion. I'd imagine it'd be a great resource.

 

[iaresee]

This is a bananas review. Thank you!

 

[MadMaxG79]

This is going above and beyond for a review. Thank you!