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Help! How to run 3 amps in phase?
MUFF WIGGLER Forum Index -> Guitars, Basses, Amps & FX  
Author Help! How to run 3 amps in phase?
rolsteins
Hi!

Does anybody have a solution how to run 3 amps (and cabs) simultaneously?
The trick is to have all 3 ones in phase to avoid phase cancelations.

Usually when I'm playing bass with 2 amps - the Lehle P-Split spliter's phase button helps a lot.
When I'm reamping or mixing 2 different mics Little Labs IPB phase alignment tool is perfect option.

Is there anything like "triple IPB" guitar pedal exists?
Is it complicated to DIY? Shematics?

(((I did a little googling and found that Gentry Densley talking about custom made "phase-waver" pedal what is dedicated to align 3 amps in phase. ( http://thequietus.com/articles/02959-eagle-twin-interview-the-unkindne ss-of-crows )
Somewhere in web you can even find photos with Boris & O'Malley guitar boards and, yes - "phase-waver" is used.)))

Suggestions are welcome!
Minimoog56
I have a Jester Hydra 3 way buffered tube splitter with 180 degree phase switches on all three line outs plus ground lift switching. Does the trick for me but sadly out of production.
tuj
two digital delays with ultrashort and ultraprecise times can do it.

you might try experimenting with a time-delay designed for pa installations. Essentially the IBD is just a digital delay.

http://varietyofsound.wordpress.com/2010/03/10/from-phasing-to-phase-a lignment/
rolsteins
tuj wrote:
two digital delays with ultrashort and ultraprecise times can do it.

you might try experimenting with a time-delay designed for pa installations. Essentially the IBD is just a digital delay.

http://varietyofsound.wordpress.com/2010/03/10/from-phasing-to-phase-a lignment/


Thanks for interesting suggestion. On other forum there was idea to use 2 P-Spliters in combination with 2 moded phasers with LFO off.

How do you think which one of digital delay (guitar pedals?) are more suited for this kind of work with very short delay times?
tuj
I came up with another idea, which is that you could use two IBD's. Essentially you can think of it like this:

IBD1 syncs Amp A and Amp B
IDB2 sync Amp A and Amp C

and since a=b and a=c, b=c!

Another idea is to use two dbx driveracks, they have a time-alignment feature (which is exactly the same as phase alignment).
aeon
For this task, nothing beats the LittleLabs PCP 3.0 — nothing.



Fantastic for reamping too — and using analog pedals on DAW sends and inserts.

http://www.littlelabs.com/pcp.html


cheers,
Ian
plord
All of these solutions are hella expensive.

Go to Radio shack, buy yourself some banana connectors. Put on on each speaker cabinet with thick solid core wire. Now you can put your signal chain together and flip the plug to reverse the polarity at the speaker. Use your ears. Whichever combination is loudest and feeds back the easiest is in phase. This solution will work with whatever splitter situation you have in place now.

Note that you need to accommodate every pedal in your chain as well. Most gain pedals, fuzz, Mutrons, etc. will flip polarity. True bypass? Now you have a "shit goes out of phase when I stomp on this pedal" problem; one way around it is to stack phase-reversing pedals and always use them in pairs. Kind of a pain. Chorus, delay, phasers will smear the initial attack impulse and complicate things in non-linear ways. Use your ears.
rolsteins
aeon wrote:
For this task, nothing beats the LittleLabs PCP 3.0 — nothing.



Fantastic for reamping too — and using analog pedals on DAW sends and inserts.

http://www.littlelabs.com/pcp.html


cheers,
Ian


PCP could be nice, but it hasn't phase alignment pot just switch. Also if we are talking about using two IBP problem is - this device use line level signal for in/out...
But we are still researching!
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