Hi all! First post on TB.
Last month I got a HW Slampegg and I adore how it sounds. Gigged with it last week through a Little Mark Vintage and it was killer. I ordered More for this month, and it got here today! Sadly, it's bringing out a lot of serious issues in the Slampegg that I initially swept under the rug.
When both are in the signal chain together, I get some awful ringing noises that only get worse with either pedal on. I have isolated power (Cioks 8), and I tried giving one of them a separate wall wart line (enough current as well, it has 500mA), no dice. With either one in the chain by themselves, there is no issue, no noise, no ringing.
When at home, I've just been going straight out of the Slampegg into a mixer; with the pedal on and the gain + master cranked, I notice a significant volume drop strangely. I've tried the Slampegg as a preamp in my guitar rig, and with buffers before and after it (I think that's what is helping, buffers maybe?) it sounds huge! Tons of gain, very loud. Straight into the mixer, very quiet. I also noticed that the mixer reads a relatively high db input when the Slampegg is on and I am not playing, but the audible noise floor remains quiet similar, so I'm wondering if there is something wrong with the output stage of my pedal? It seems like there is either inaudible noise it's generating or loading the preamps in some strange way, not sure. To further explore this, I disconnected the input of the Slampegg and just sent the output to my mixer, and the pedal turned into a really loud oscillator! I could change the pitch by moving the pots. It was awful, I heard my downstairs neighbors say "oooo" out loud with contempt; I tried the same thing with More, but it just boosted the background noise that you get when nothing is in the input jack. Something seems wrong with my Slampegg. I know More is a brand new pedal, but it doesn't seem to be the culprit here. Using it by itself (no Slampegg in the chain), zero issues; it's a boost, and a great sounding one! Only when the two are together. Oh and I get terrible popping noises when engaging usually silent pedals if the Slampegg is on.
This has all been fine since the Slampegg still sounds great, even with a volume drop. Now however, with More behind it, there is this terrible ringing noise and nothing I've tried has gotten rid of it. I'm curious if anyone else here has had any similar issues, or if you might have input to try and remedy this. Thanks!
tl;dr - awful ringing noise when using HW Slampegg with More, slampegg volume drop, turns into a synth oscillator with no input
Welcome to TB! I can't offer you much help as I fought the same thing. The whining, the popping, all the noise so I don't think there is anything 'wrong' with your pedals. It's just something that happens when using more than one in a chain. I've tried buffers, isolators, everything. Sometimes they help but sadly I just can't take a chance on those noises showing up on a gig so even though the Slampegg into my UA sounds glorious, I just can't use them both. I now use the UA on my main board and the Slampegg on my small board and had to get other non-tube pedals to use with them.
