VecGS Posted December 9, 2019 Share Posted December 9, 2019 I have purchased a Powercab 212+ and it just seems noisy/hissy. In the quiet room I'm practicing in, I can hear noise from 6-10 feet away. With the volume turned to zero. Connected to a Helix via the digital AES connection, with the Helix's volume also turned to zero. (Verified that I have the latest firmware, etc.) My expectation with a $1400 FRFR speaker is that when I turn it on with no signal and the volume pegged at zero I should have a quiet piece of gear. This seems to be getting worse over time as well. Is this the experience that others are getting or do I have a dud? Quote Link to comment Share on other sites More sharing options...
phil_m Posted December 9, 2019 Share Posted December 9, 2019 Do you have it connected to a computer via USB? Even then, though, there shouldn't be any noise passing through with the PC's volume knob turned down. I just turned my 112 PC+ on, and it's dead quiet even if I turn the volume knob all the way up (without anything connected). Even with the Helix connected via L6 Link, it is pretty quiet. It certainly sounds like yours may have a hardware issue. Quote Link to comment Share on other sites More sharing options...
VecGS Posted December 9, 2019 Author Share Posted December 9, 2019 Even with nothing connected at all there's still a lot of noise. I tried both with a computer and/or iPad connected to the Helix, but other than checking for firmware updates I've not connected anything USB to the PC+. The funny thing in my case is that regardless of where I have the volume knob, the noise is exactly the same. It's just a background noise that always exists when it's on. Quote Link to comment Share on other sites More sharing options...
tooloudtoobad Posted December 9, 2019 Share Posted December 9, 2019 I have a pair of powercab plus they do not make any loud buzz or noise they are very quiet. 1 Quote Link to comment Share on other sites More sharing options...
metallaholic Posted December 14, 2019 Share Posted December 14, 2019 I have a 212 plus. With nothing connected but the power cable there is a low hiss/white noise. It stays the same level no matter what you turn the volume knobs. I don't notice when playing.....only when not. Quote Link to comment Share on other sites More sharing options...
zigatron Posted December 14, 2020 Share Posted December 14, 2020 I have 112 plus has similar hiss. I measured it with a db meter is about 40db so it is quieter than my AC. But, It considerable more noticeable when I tilt the power cab back aka when it is directed at your ears. I'm not sure if this is normal. Quote Link to comment Share on other sites More sharing options...
Wondo100 Posted December 14, 2020 Share Posted December 14, 2020 I have a new 212+ and it came with the latest firmware. No hiss at all when volume knob is off. Did you try to plug it in to a different outlet or maybe in another room in the house just to see if it is the room or the particular outlet? Quote Link to comment Share on other sites More sharing options...
zigatron Posted December 15, 2020 Share Posted December 15, 2020 Thanks I will try in a couple locations and see if can notice a difference Quote Link to comment Share on other sites More sharing options...
OmniFace Posted December 22, 2020 Share Posted December 22, 2020 I have two PC212+ and use L6 Link for my connection. I have not noticed any hiss from either amp. I'll need to double check though. Is it possible you're not using a real AES/EBU cable (110 Ohms)? Maybe you're just using a regular XLR microphone cable, and the incorrect impedance is making the digital signal noisy? Quote Link to comment Share on other sites More sharing options...
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