Steve_nottm Posted January 2, 2011 Share Posted January 2, 2011 Hi all. Any advice gratefully recieved. I play through a hartke 3500 into an Eden 4x10 and last night played a new years eve gig. As the pa was vocals only we were using the backline for everything else. Usually no problem. However, for some reason I couldn't turn my volume up above about half without getting a boomy throbbing noise coming through. It happened with the bass off (pedal muted) so isn't related to bass or pedals. I managed to get by but I don't know the cause. Is is something that needs looking at amp or cab wise? Is it just to do with the room, or something else environment related? Any ideas? Quote Link to comment Share on other sites More sharing options...
nottswarwick Posted January 2, 2011 Share Posted January 2, 2011 Hi Sorry to hear your prob. Might be worth checking the speaker lead wiring. Other than that I know a decent tech in Nottm. Were you gigging plainsman nye? Any good? We did Xmas eve there (I drum in Buster) and it was rammed. Quote Link to comment Share on other sites More sharing options...
dincz Posted January 2, 2011 Share Posted January 2, 2011 From your description, it sounds like you might have a microphonic preamp valve - i.e. it's picking up and amplifying the sound from your speakers. If you turn it up far enough, the result will be feedback. Quote Link to comment Share on other sites More sharing options...
Steve_nottm Posted January 2, 2011 Author Share Posted January 2, 2011 [quote name='nottswarwick' post='1074917' date='Jan 2 2011, 12:23 AM']Hi Sorry to hear your prob. Might be worth checking the speaker lead wiring. Other than that I know a decent tech in Nottm. Were you gigging plainsman nye? Any good? We did Xmas eve there (I drum in Buster) and it was rammed.[/quote] hi, yes played at the plainsman. Was pretty good really. Fairly busy and lively, with only the odd drunkard trying to grab a mike or pull the singer (always the singer!). Had better though as I wasn't really relaxed due to aformentioned problem. We play there last sat of every month. Also seem to play tantra regularly too. I'm the new boy in the band at the moment so still not sure which venues are the good ones. Plainsman seems to be good fun though. You got any gigs coming up? Quote Link to comment Share on other sites More sharing options...
Steve_nottm Posted January 2, 2011 Author Share Posted January 2, 2011 [quote name='dincz' post='1075132' date='Jan 2 2011, 11:27 AM']From your description, it sounds like you might have a microphonic preamp valve - i.e. it's picking up and amplifying the sound from your speakers. If you turn it up far enough, the result will be feedback.[/quote] cheers erm..... Is this a solvable problem or just a "feature" that I'll have to live with and work around? Quote Link to comment Share on other sites More sharing options...
dincz Posted January 2, 2011 Share Posted January 2, 2011 (edited) [quote name='Steve_nottm' post='1075549' date='Jan 2 2011, 07:15 PM']cheers erm..... Is this a solvable problem or just a "feature" that I'll have to live with and work around?[/quote] Easily solved - just plug in a new valve! A quick check might be in order first. Unplug your bass from the amp, turn the volume up almost to the point where the noise happened, and give the amp a firm tap. If you hear noises from the cab when you tap the amp then it's very likely a dud valve. Edited January 2, 2011 by dincz Quote Link to comment Share on other sites More sharing options...
Steve_nottm Posted January 2, 2011 Author Share Posted January 2, 2011 [quote name='dincz' post='1075564' date='Jan 2 2011, 06:29 PM']Easily solved - just plug in a new valve! A quick check might be in order first. Unplug your bass from the amp, turn the volume up almost to the point where the noise happened, and give the amp a firm tap. If you hear noises from the cab when you tap the amp then it's very likely a dud valve.[/quote] cracking cheers. Will give that a go. Quote Link to comment Share on other sites More sharing options...
spinynorman Posted January 6, 2011 Share Posted January 6, 2011 (edited) [quote name='Steve_nottm' post='1074908' date='Jan 2 2011, 12:04 AM']Hi all. Any advice gratefully recieved. I play through a hartke 3500 into an Eden 4x10 and last night played a new years eve gig. As the pa was vocals only we were using the backline for everything else. Usually no problem. However, for some reason I couldn't turn my volume up above about half without getting a boomy throbbing noise coming through. It happened with the bass off (pedal muted) so isn't related to bass or pedals. I managed to get by but I don't know the cause. Is is something that needs looking at amp or cab wise? Is it just to do with the room, or something else environment related? Any ideas?[/quote] I'm impressed. When I had an HA3500 I never got above the 9 o'clock position. At least, not without pinning the punters against the back wall. Edited January 6, 2011 by spinynorman Quote Link to comment Share on other sites More sharing options...
Steve_nottm Posted January 6, 2011 Author Share Posted January 6, 2011 Well.... All mended. Many thanks for the advice. I popped a new tube in and it's like new. Good old basschat. Quote Link to comment Share on other sites More sharing options...
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