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Old 3rd March 2008, 06:20 PM   #1
LackOfIntelect
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How do you REALLY split a guitar signal?

Suposedly, this leehle pedal are really good spliting signals. And yes, they are better than any other thing I`ve tried (when powered by a boss power suply).

But still, if you split the signal into two amps with high gain, you still get hum.

Is there a way to eliminate all the hum without messing with your tone?
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Old 3rd March 2008, 06:27 PM   #2
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I do it with a powered DI splitt box from a sort french brand. I will look for it. It works perfect. No signal lost no buzz no tone difference.

O btw check this link:
Google Image resultaat voor http://www.dolphinmusic.co.uk/shop_image/uploads/Image/guitars/NEWS/BOSS/5.jpg
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Old 3rd March 2008, 06:33 PM   #3
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http://www.littlelabs.com/pcp.html

Not cheap, but an awesome tool.
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Old 3rd March 2008, 06:34 PM   #4
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Radial JD7 is the best unit I've seen for this.

Radial JD7 Injector guitar signal distribution amplifier
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Old 3rd March 2008, 06:39 PM   #5
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No hum with my Voodoo Lab unit......individual ground lift switches.
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Old 3rd March 2008, 06:43 PM   #6
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If you are electronically inclined, you can learn to build distribution amplifier very inexpensively using op-amps
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Old 3rd March 2008, 06:46 PM   #7
LackOfIntelect
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Yes, I know that there are many devices that suposedly work wonders.

But, what I was trying to ask is: what do you must do electronicly to eliminate hum (without fking with the tone)?

How can you make electricity that comes through a wire, split into two wires without making them interact with each other?
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Old 3rd March 2008, 06:54 PM   #8
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I use a Switchbone to switch between my high gain and clean amps. It also has tuner out and a good sounding boost/mid-boost switch. The mid-boost is really nice for leads.

If you want to switch heads, but use a single cabinet, look here.

Quote:
Originally Posted by LackOfIntelect View Post

But, what I was trying to ask is: what do you must do electronicly to eliminate hum (without fking with the tone)?
It has an isolation transformer on the B output so there is no chance of ground hum.
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Old 3rd March 2008, 06:57 PM   #9
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Quote:
Originally Posted by LackOfIntelect View Post
Yes, I know that there are many devices that suposedly work wonders.

But, what I was trying to ask is: what do you must do electronicly to eliminate hum (without fking with the tone)?

How can you make electricity that comes through a wire, split into two wires without making them interact with each other?
Hi

All the guys posted solutions but you didn't see further than your basic problem.

To split a signal you need a transformer or amplifier system to buffer the signal from the guitar. You can't just join the wires..

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Old 3rd March 2008, 08:20 PM   #10
LackOfIntelect
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Quote:
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To split a signal you need a transformer or amplifier system to buffer the signal from the guitar.
I know.

But I have yet to find a device that does it properly.

Enjoy Cool Switching

This is the best one I`ve used until today. Guess what, it doesn`t work properly on hi gain guitar amps. Other than that it is hum free.
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Old 3rd March 2008, 08:27 PM   #11
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Quote:
Originally Posted by LackOfIntelect View Post
I know.

But I have yet to find a device that does it properly.

Enjoy Cool Switching

This is the best one I`ve used until today. Guess what, it doesn`t work properly on hi gain guitar amps. Other than that it is hum free.
Search no longer;

Little Labs PCP


Sorry, I just saw another post with the same recommendation,
Its a great tool for this application,
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Old 3rd March 2008, 09:12 PM   #12
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Little labs can split channels, but has no chanel changing capabilities. Wich makes it kind of useless in guitar rigs. Plus, there is absolutely no proof that it will work better than a lehle.

So, forget about signal spliting...

Lets say that I have a soundsculpture switchblade making all the spliting. Obviously there will be a hell lot of hum (I`ve tried it). Is there any device that I can put between the switchblade and the amps, that will eliminate the hum?

If there is, how does it work?
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Old 3rd March 2008, 09:55 PM   #13
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I paid way to much for monster cables to split anything... sorry.
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Old 3rd March 2008, 10:22 PM   #14
LackOfIntelect
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I paid way to much for monster cables
I bet you did...
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Old 3rd March 2008, 11:18 PM   #15
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Quote:
Originally Posted by LackOfIntelect View Post
Little labs can split channels, but has no chanel changing capabilities. Wich makes it kind of useless in guitar rigs. Plus, there is absolutely no proof that it will work better than a lehle.

So, forget about signal spliting...

Lets say that I have a soundsculpture switchblade making all the spliting. Obviously there will be a hell lot of hum (I`ve tried it). Is there any device that I can put between the switchblade and the amps, that will eliminate the hum?

If there is, how does it work?
Hi

A transformer isolates all the grounds and provides two or more floating outputs.

How do you know that the hum isn't being picked up in the guitar pick ups?

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Old 3rd March 2008, 11:21 PM   #16
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Quote:
Originally Posted by Geoff_T View Post
Hi

A transformer isolates all the grounds and provides two or more floating outputs.

How do you know that the hum isn't being picked up in the guitar pick ups?

Turn your volume knob on your guitar all the way down. If the hum is still there, it's not your pickups.
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Old 3rd March 2008, 11:30 PM   #17
LackOfIntelect
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Quote:
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Hi

A transformer isolates all the grounds and provides two or more floating outputs.

How do you know that the hum isn't being picked up in the guitar pick ups?

With a single amp, it does none.
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Old 4th March 2008, 12:04 AM   #18
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as was mentioned earlier, the voodoolab ampselector will do exactly what you are looking for.
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Old 4th March 2008, 12:06 AM   #19
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Quote:
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Hi

A transformer isolates all the grounds and provides two or more floating outputs.

How do you know that the hum isn't being picked up in the guitar pick ups?

Doesn't the Palmer PGA-03 Y-Box Guitar Splitter do this? Check it out.

Palmer | PGA03

Palmer PGA-03 Y-Splitter | Soundland Online Music Store
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Old 4th March 2008, 12:24 AM   #20
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Quote:
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How do you REALLY split a guitar signal?
with a VERY sharp knife.
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Old 4th March 2008, 01:01 AM   #21
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The Lehle is a passive splitter, despite all the powered stuff around it - the actual signal path would appear to be simply multiple secondary transformer with a few relays to effect the switching.

Both the Palmer and LittleLabs splitters are active - they include a buffer amplifier as well as transformer isolation.

I think the previous suggestions have all been predicated on the assumption that your hum problem is a ground loop. (Which is exactly what I though as soon as I read the initial post.) Thus the concentration on transformer isolation.

It sounds more as if you are simply picking up some residual hum in the system from any one of a number of sources. Does the Lehle hum if you run it with no power? It seems that it will default to splitting the signal to both outputs if not powered. That would tell you if there is hum injection via the power supply (it won't be from the usual causes of power supply, but it might capacitively couple enough junk to the chassis of the unit to be an issue. What about if you only connect one amp? What if both amps are connected but no guitar?
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Old 4th March 2008, 01:39 AM   #22
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I spilt with a Framptone A/B/Y. It has a transformer inside, and is built like a tank. It cost $300 , 5 or 6 years ago. I got this for live , but it works great in the studio. Prior to that I had a $35 Whirlwind , and a dastardly hum. You get what you pay for.
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Old 4th March 2008, 02:00 AM   #23
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My VHT valvulator never added noise when I was runninig a stereo rig, the ground lift(only on the early versions) actually made both amps quiter. It does have an effect on the tone, but its slight and I found it pleasing, but others may not.
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Old 4th March 2008, 02:04 AM   #24
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Little Labs PCP is hard to mess with. The earth feature is a magical life saver.
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Old 4th March 2008, 04:36 AM   #25
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Quote:
Originally Posted by Francis Vaughan View Post
The Lehle is a passive splitter, despite all the powered stuff around it - the actual signal path would appear to be simply multiple secondary transformer with a few relays to effect the switching.

Both the Palmer and LittleLabs splitters are active - they include a buffer amplifier as well as transformer isolation.

I think the previous suggestions have all been predicated on the assumption that your hum problem is a ground loop. (Which is exactly what I though as soon as I read the initial post.) Thus the concentration on transformer isolation.

It sounds more as if you are simply picking up some residual hum in the system from any one of a number of sources. Does the Lehle hum if you run it with no power? It seems that it will default to splitting the signal to both outputs if not powered. That would tell you if there is hum injection via the power supply (it won't be from the usual causes of power supply, but it might capacitively couple enough junk to the chassis of the unit to be an issue. What about if you only connect one amp? What if both amps are connected but no guitar?
Especially the last one. Most amps have a +/0/- on the earth. Try flipping the polarity on one.

Any of these devices will work with properly wired guitars and properly designed and cabled amps. I know the Radials work, and have 14 heads all running without issue. Radial also has a newer unit to switch guitars and heads, so it has a little matrix action going. Now if I just had a 16 way head:cab matrix.

I'm sure the Little Labs guy works to. All his other stuff does wonders, and he didn't just release a doorstop for no reason.

Not to be a dick, but you really are disregarding peoples recommendations based on lower end "player" level boxes. Try a pro "for studio" box and come back to us when it doesn't work to diagnose what you did wrong. It's not gonna be the box.
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Old 5th March 2008, 07:12 PM   #26
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Originally Posted by LackOfIntelect View Post
I know.

But I have yet to find a device that does it properly.

Enjoy Cool Switching

This is the best one I`ve used until today. Guess what, it doesn`t work properly on hi gain guitar amps. Other than that it is hum free.
Hi LackOfIntelect,

thanks for using my product!

My P-Split and Dual have a transformer inside. From this point you have a galavanic isolation that normally works totally hum free.
Which product do you use?

All the best
Burkhard
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Old 5th March 2008, 07:18 PM   #27
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Voodoo Labs Amp Splitter. Sounds perfect, with a ground lift, up to 4 amps and a DI/tuner out for $250. Done. I use mine every week.
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Old 6th March 2008, 04:00 PM   #28
LackOfIntelect
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Quote:
Originally Posted by Lehle View Post
Hi LackOfIntelect,

thanks for using my product!

My P-Split and Dual have a transformer inside. From this point you have a galavanic isolation that normally works totally hum free.
Which product do you use?

All the best
Burkhard
I have the Lehle Dual SGoS. But hum doesn`t bother me anymore. The hum wasn`t that loud (could only be heard in tails), so I got an isp tech decimator prorackg and it works flawlessly.

Regards
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Old 8th March 2008, 08:04 PM   #29
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my friend david in san jose makes really nice custom rack-mount guitar splitter boxes.
he's a slut, too. ......although, currently, he's busy building serious hi-fi speakers
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Old 8th March 2008, 09:34 PM   #30
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Originally Posted by LackOfIntelect View Post
I know.

But I have yet to find a device that does it properly.

Enjoy Cool Switching

This is the best one I`ve used until today. Guess what, it doesn`t work properly on hi gain guitar amps. Other than that it is hum free.
Try good power. I bet it's the Boss adapter...
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