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Conference napalm::guitar

Title:GUITARnotes - Where Every Note has Emotion
Notice:Discussion of the finer stringed instruments
Moderator:KDX200::COOPER
Created:Thu Aug 14 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3280
Total number of notes:61432

576.0. "Stereo guitar setup problems?" by VIDEO::BUSENBARK () Thu Apr 07 1988 20:36

    	Has anyone had any problems or experiance with a stereo guitar
    setup run by 2 separate amps and a single cabinet?
    
    
    							Rick
    
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576.1More details please...CCYLON::ANDERSONFri Apr 08 1988 02:141
    
576.2Single cabinet?DREGS::BLICKSTEINMIDI DJFri Apr 08 1988 12:4613
    I'm not sure what you mean by a single cabinet.  Two amps feeding
    the same cabinet?  That's dangerous.
    
    My Carvin is stereo and I've used the "stereo" feature, but more as an
    A/B switcher between amps rather than to create L+R type stereo.
    
    I ended up using a pan pedal instead cause it gave me more flexibility.
    The problem was that each pickup was devoted to one amp, and I wanted
    to be able to send either pickup to either amp.
    
    However, there are some modifications to my guitar that I'm trying to
    get Carvin or someone to do that will allow me to get rid of the pan
    pedal.
576.3more specifics...VIDEO::BUSENBARKFri Apr 08 1988 12:5317
	Essentially I run 2 12's left and 2 12's right in a single cabinet
powered by 2 separate heads. I use an A/B switch to change amps. One amp
is setup to play clean rythmn and lead,the other is setup to play through
my signal processing gear (some of which is pseudo stereo) with the left
and right to each amp respectively for panning/chorusing effects. The guitars
are mono.
	I have heard 2 problems one is a high frequency feedback with minimal
volume and other sounds like a pulse of a middle to low frequency. Two dif-
ferent times. The only way I get rid of the problem is by powering down the
signal processing amp. I can run one amp in mono and have no problems.The amps
are essentially used for stage monitoring volume,so I don't think it is a volume
problem.

						Any ideas?

							Rick

576.4Stereo CabinetVIDEO::BUSENBARKFri Apr 08 1988 13:0017
    Dave,
    
    	The cabinet is wired in stereo,and was made for people who use
    the Roland JC series amp's and I assumed :^( that it could be used
    by any 2 amps in stereo.... I may end up having to do a stereo power
    amp,however people like Eric Johnson etc. do the same thing and
    don't seem to have this problem? I'm beginning to wonder if I have
    to connect the 2 amps electrical some how? Or is something stupid
    I've done...
    
    
    							Baffled...
    
    								Rick
    
    
    							
576.5it's fixed... :^)VIDEO::BUSENBARKMon Apr 11 1988 13:4920
	Well I think I found what my problems were in doing a stereo setup
and have made some changes in the setup which made a big difference.
	A couple of things,I use an A,B,C switch which gives me the capab-
ilities to go to 3 different texture's or tones. 1. Clean Fender sound,2.
Overdriven Fender sound,3.A Stereo Processed sound with EQ/Distortion/chorus
and delay. Previously I was not using the "C" section and it was just hanging
in the air. The processed signals were going into a channel with reverb which
could have been feedingback from cabinet vibrations. I used the non-reverb
channel for Psuedo-stereo effects such as chorus/delay on both amps wired to
separate sets of 12" speakers,plus both amps are selfcontained with a speaker
which is used for monitoring.
	I have comment that having the capabilities of using effects in stereo
sounds a bit like overkill,(why don't you just play,the crowd would never know?)
BUT the sound's are quite incredible and are trully worth the extra hassles! 
	Any comments or experiance people have had with trying the same sort 
of setup,I'd appreciate as I'm always looking for improvement and maybe added
tonalities.

							Rick
	
576.6stereo out of 1 cab???DRUID::MARIANIWed Apr 27 1988 14:2025
    Rick,
    
    	I've been using a stereo set-up for a couple years now and can't
    figure out why you'd want to run stereo and then have the signal
    come out of one cab...  The whole idea is to seperate the channels
    so that you get a fatter sound.   If you were to take your  home
    stereo speakers and place them right next to each other you'd
    more or less defeat the stereo effect.  I like to set up with one
    amp almost directly behind me and one about 20ft away, but still
    facing me. (angled)  this seems to give me the best seperation and
    the most "spacious" sound.  Now that I've been running a stereo
    set, I can't go back to mono, it just doesn't have the punch.
    
    I'v enever had any sort of feedback problems due to running stereo.
    I use two seperate 60watt amps this way...
    
    Guitar signal goes to pre-amp (amp#1).  I take the signal from the
    pre-amp and run it through an MXR stero chorus with the main channel
    coming back to the power amp (#1).  the other side of the MXR goes
    to the power amp of #2.  I use other effects, but that's the basic
    set-up.   It gives me plenty of power and a wide, warm sound......
    I also use this with a guitar synth and it adds a whole new dimension
    (or was that demention??) to the string sounds.  good stuff./..
    
    	Ted
576.7Stereo with One CabinetAQUA::ROSTThat's right, SamWed Apr 27 1988 15:1811
    
    Re: .6
    
    FWIW, the Roland JC amps are all single cabinet beasts.
    
    Even with very little separation, the stereo effect is noticeable,
    although separation makes it more dramatic.
    
    Not unlike a ghetto blaster...
    
    
576.8I'll probably never go mono again too!VIDEO::BUSENBARKWed Apr 27 1988 15:528
    re. 6,7 the 4-12 cab I use is a Roland JC Stereo cab
    
    	I'd be interested to know more as to your experiance with the
    synthe and whether you are using a solid state power amp or tube?
    	The 2 amps I'm using are both self contained and I use those
    speakers also....