Kemper Stage - Main & Monitor Output noise floor hiss is LOUD.

svenelof · August 5, 2019 at 9:19 PM

I just found another new problem with the Kemper Stage. I've just tried out the main output and the monitor output for the first time and there's an unbelievable amount of noise floor. So much background hiss...even when I set the main or monitor output to off in the output settings. FOH and my FRFR cab will not like this haha.

The headphone output is dead silent with no background noise at all so it's not something external affecting the whole unit.

It's not a ground loop thing as the ground loop options did nothing but also I plugged it in to the same power plug circuit as my Golden Age Project Pre73 to test things... I cranked the gain and output of the pre 73 and still didn't get as high a noise floor. So it's definitely not external factors or dimmer circuits affecting things. It's an issue with the outputs on the Kemper Stage I think? I had white noise from the headphone output on Kemper Stage when the Kemper is off and Kemper Support said they knew of the bug.... Do they know of the bug with the main and monitor outs too?

Ingolf · August 5, 2019 at 9:37 PM

Quote from svenelof

... Kemper Support said they knew of the bug.... Do they know of the bug with the main and monitor outs too?

Yes they do.

svenelof · August 5, 2019 at 9:54 PM

Ingolf Phew, at least I can rest now knowing it's fixable. Looking forward to receiving my replacement Kemper Stage so I can actually enjoy it. It's a bit like when you're a kid and you get a toy for Christmas without batteries, you really wanna play with it but you can't

Vinny Burns · August 6, 2019 at 12:14 PM

Quote from Ingolf

Yes they do.

This is not the white noise that ramps up after turning the unit off, this is a hiss while the unit is on. On mine during profiling, turning the ground on the send to ON does exactly as described above. Really loud hiss. The ground switch for the send is useless because of this.

So when you say they know about this, is it definitely this issue and not the white noise when turning the unit off?

Ingolf · August 6, 2019 at 12:24 PM

Quote from Vinny Burns

This is not the white noise that ramps up after turning the unit off, this is a hiss while the unit is on. On mine during profiling, turning the ground on the send to ON does exactly as described above. Really loud hiss. The ground switch for the send is useless because of this.

So when you say they know about this, is it definitely this issue and not the white noise when turning the unit off?

I'm not support, so when in doubt please open a support ticket.

The more data support gets the better.

PhilUK84 · August 6, 2019 at 12:55 PM

Mine kind of hums, more mid to lower type sound. Not a high pitch hiss. Is it like that?

svenelof · August 6, 2019 at 2:03 PM

This is the noise from the Kemper Stage monitor output. On all output settings in the menu. Half way through I switch the output to "off" in the Output menu (Still noise but a different noise) Then back cycling through all until I get to stereo.

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Again, this is also on the main outputs that I'd normally send to FOH for "great sound". This does NOT happen on the headphone output when Kemper is on and I'm listening/playing with headphones on. The headphone noise comes when the Kemper Stage is switched off (and it's a different noise than the main and monitor output)

PhilUK84 · August 6, 2019 at 2:21 PM

Oh mine doesn't do that. Mine has a little bit of a hum, but I figured that's normal. That sounds horrible...

Kemper Support #1 · August 6, 2019 at 4:21 PM

svenelof it is very unfortunate that you received a faulty unit and we are doing our best to replace it as soon as possible. I can assure you that our products normally do not generate the amount of noise that you are experiencing.

Please wait for the empty box to arrive at your place so you can return the faulty unit safely to us and we will send you a replacement unit as soon as we have received the faulty one. We apologise for all the inconveniences caused by this.

Vinny Burns · August 7, 2019 at 2:29 AM

Quote from Ingolf

I'm not support, so when in doubt please open a support ticket.

The more data support gets the better.

Sorry, was just trying to confirm what you meant when you answered “Yes they do” in your reply above. Just replying to your post.

e00f0df68fb70686869190dbde246a14321ae6a9 · August 12, 2019 at 8:59 PM

I've got exactly the same problem...

I sent a message to the support today and waiting...

e00f0df68fb70686869190dbde246a14321ae6a9 · August 15, 2019 at 5:54 PM

Faulty unit with broken output... waiting for a new one!

viotheo · February 26, 2020 at 3:31 PM

Hi, I've got exactly the same and more problems, noise/buzz, screen colors, footswitches.

Watch and listen the 2 videos ( NOISE BUZZ 1, NOISE BUZZ 2) and you can see what I'm facing. Maybe it helps you!

https://drive.google.com/drive/folders/…NfqKebw0v0KsaXH

Ingolf · February 26, 2020 at 3:59 PM

Quote from viotheo

Hi, I've got exactly the same and more problems, noise/buzz, screen colors, footswitches.

Watch and listen the 2 videos ( NOISE BUZZ 1, NOISE BUZZ 2) and you can see what I'm facing. Maybe it helps you!

https://drive.google.com/drive/folders/…NfqKebw0v0KsaXH

The 3rd thread where you cross- post information!

musicmad · February 26, 2020 at 4:43 PM

Quote from Ingolf

The 3rd thread where you cross- post information!

So? Of course one should chip in if the information is relevant to more than one thread. That's not cross-posting.