Mark IV help

Anthony · 10-17-2007, 10:35 PM

Hey bros! I'm super psyched atm, I ust got my MKIV yesterday with a 212 recto cab. But I have one problem, and I've had it with my previous amp (Roland Cube 30). I get a shit load of feedback, and I have no idea why. I have my amp plugged into to a surge protector with a ton of other things plugged into it. I plug the amp into a clean, newer electric line in my bathroom, without anything else plugged into it, and I still have feedback. My set up is pretty simple. Amp To guitar, no effects, nothing. Yet I still get a shit load of feedback, and playing over 2 is impossible with all this feedback. This happens wit hall my guitars, and I've tried multiple cables. Any ideas guys?

theunforgiven246 · 10-17-2007, 11:22 PM

Your pickups might have something wrong with them.

sakeido · 10-18-2007, 12:04 AM

The tubes might be really old and they will feedback non-stop if this is the case. You could have the pull bright and fat switches engaged with really high presence settings, which will make this amp feedback non-stop! Try turning the gain down and compensating by turning the drive up, which seems to reduce it somewhat. Try decreasing the high EQ a bit on the graphic EQ.
My Mark IV had feedback when I got it because of old-ass tubes. Changing them helped a lot.

Metal Ken · 10-18-2007, 12:05 AM

Quote:

Originally Posted by sakeido

The tubes might be really old and they will feedback non-stop if this is the case.

Microphonic tubes can ruin your day pronto. Even at low volumes, if they're bad, they'll pick stuff up and continue to ring after you stop playing.

The Dark Wolf · 10-18-2007, 12:09 AM

^ Yep. I was gonna suggest this exactly. Sounds like bad (microphonic) tubes. Change 'em and your troubles will likely disappear.

Leon · 10-18-2007, 12:36 AM

these guys are all wrong. send me the amp, and i'll give it a thorough, 5 year inspection

* Leon is joking, they're on the money on the tube issue.

aldog1330 · 10-18-2007, 02:58 PM

Weird...especially if it happened with your old amp (the Cube, which is solid state). What other guitars do you have? Is the gain on 10?

AngelVivaldi · 10-18-2007, 03:00 PM

could be the cable maybe?

Stitch · 10-18-2007, 03:04 PM

If you've dimed the gain and your pickups are shit then that could be your problem.

Other than that, have you tried running with a noise gate? What does that do to the sound?

urklvt · 10-18-2007, 03:10 PM

Tubes. Wouldn't hurt to post your settings even though that's a lot of numbers to post.

My tubes are fresh and I use EMGs, the Bodenhamer modded TS-9, and LOTS of gain, and I don't get the kind of feedback you're talking about.

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10-17-2007, 10:35 PM	#1 (permalink)
Anthony IST KRIEG! Join Date: Jun 2007 Location: Nassau Long Island Posts: 1,680 Real Name: Anthony Main Seven: Purple Septor 727 Main ERG: I owned a 2228 for a week Rig: RGA321 > Mark IV Thanked: 22	Mark IV help Hey bros! I'm super psyched atm, I ust got my MKIV yesterday with a 212 recto cab. But I have one problem, and I've had it with my previous amp (Roland Cube 30). I get a shit load of feedback, and I have no idea why. I have my amp plugged into to a surge protector with a ton of other things plugged into it. I plug the amp into a clean, newer electric line in my bathroom, without anything else plugged into it, and I still have feedback. My set up is pretty simple. Amp To guitar, no effects, nothing. Yet I still get a shit load of feedback, and playing over 2 is impossible with all this feedback. This happens wit hall my guitars, and I've tried multiple cables. Any ideas guys?

10-17-2007, 11:22 PM	#2 (permalink)
theunforgiven246 BEHOLD KLUMPAMUS PRIME! Join Date: Apr 2005 Location: Ohio Posts: 1,382 Real Name: John Main Seven: Ibanez RG 7621 Rig: 5150 combo and vsts Thanked: 13	Your pickups might have something wrong with them. my girlfriend says i'm totally METAL! balls.

10-18-2007, 12:04 AM	#3 (permalink)
sakeido Is a Pastafarian Join Date: Jul 2006 Location: Calgary AB Posts: 3,471 Real Name: Cody Main Seven: COW7 Silverburst Main ERG: 2077XL Rig: Stiletto/Nova/Orange Thanked: 177	The tubes might be really old and they will feedback non-stop if this is the case. You could have the pull bright and fat switches engaged with really high presence settings, which will make this amp feedback non-stop! Try turning the gain down and compensating by turning the drive up, which seems to reduce it somewhat. Try decreasing the high EQ a bit on the graphic EQ. My Mark IV had feedback when I got it because of old-ass tubes. Changing them helped a lot. _________________________ "Ah, she's built like a steakhouse but she handles like a bistro" - ZB My Soundclick Page

10-18-2007, 12:09 AM	#5 (permalink)
The Dark Wolf Booze & Metal, Arrgh! • Super Moderator • Join Date: Apr 2005 Location: Toledo, Ohio. USA Posts: 16,011 Real Name: Bob Main Seven: 2001 Ibanez RG2027XVV Rig: GNX/Magicstomp Thanked: 83	^ Yep. I was gonna suggest this exactly. Sounds like bad (microphonic) tubes. Change 'em and your troubles will likely disappear. http://www.wolf.org

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10-18-2007, 12:36 AM	#6 (permalink)
Leon {##[====:::. • Super Moderator • Join Date: Jul 2004 Location: The Ohio Crew Posts: 12,373 Main Seven: RG7620 of Doom Rig: Mesa / Sovtek Thanked: 78	these guys are all wrong. send me the amp, and i'll give it a thorough, 5 year inspection * Leon is joking, they're on the money on the tube issue. I have a radical idea. The door swings both ways, we could reverse the particle flow through the gate. We'll cross the streams.

10-18-2007, 02:58 PM	#7 (permalink)
aldog1330 I like beer Join Date: Dec 2004 Location: Albany, NY Posts: 650 Main Seven: PRS Singlecut Rig: Mesa Mark IV Thanked: 2	Weird...especially if it happened with your old amp (the Cube, which is solid state). What other guitars do you have? Is the gain on 10?

10-18-2007, 03:00 PM	#8 (permalink)
AngelVivaldi NEW ALBUM 3\|11\|08! Join Date: Mar 2007 Location: Central NJ Posts: 339 Real Name: Angel Main Seven: Customized Ibanez RG Rig: Marshall AVT150H Thanked: 8	could be the cable maybe? NEW ALBUM OUT ON MARCH 11 2008!!! www.AngelVivaldi.net \| myspace.com/angelvivaldi1 \|Black Market Hero

10-18-2007, 03:04 PM	#9 (permalink)
Stitch Join Date: Aug 2005 Location: Edinburgh, Scotland Posts: 6,768 Real Name: Simon Main Seven: Ibanez RG7420 & S7420FMTW Main ERG: Orion OG8 Rig: Peavey 6505 Thanked: 107	If you've dimed the gain and your pickups are shit then that could be your problem. Other than that, have you tried running with a noise gate? What does that do to the sound?

10-18-2007, 03:10 PM	#10 (permalink)
urklvt This is my alt Join Date: May 2005 Location: Leesville, LA Posts: 2,434 Real Name: urk Main Seven: 28.625" S7420 Main ERG: 30 fret 5ths tuned 7 Rig: Mesa Mark IV Thanked: 4 / 1	Tubes. Wouldn't hurt to post your settings even though that's a lot of numbers to post. My tubes are fresh and I use EMGs, the Bodenhamer modded TS-9, and LOTS of gain, and I don't get the kind of feedback you're talking about. "Dude, you need to find the right fucking meds to be on, because you are the most unstable person I know."

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