loud hum from pedals

[paulaviation]

Right so my set up is this

Fender J -> Boss TU3 -> Boss LS2 set to A+B Mix
Chain A: EHX Bass Big Muff -> EHX Enigma
Chain B: Digitech Bass synth wah -> Boss OS2
then to amp.

The Muff and OS2 work fine when they're isolated in the setup, as in Bass -> muff -> amp, without any hum. Little bit of hiss at high gains but whatever.

It's only when they;re in the full chain that they produce really loud hum.

All the pedals are daisy-chained from the TU-3, and the supply has a rating of 600mA, so I'm no where near the limit, and the Enigma has its own supply.

Any idea what the hum is being caused by? Possible LS2 problem?

[s_mcsleazy]

sometimes its the powersupply

[paulaviation]

The power supply will power everything fine with no hum when the LS-2 isn;t in the chain, it'll even power the enigma through daisy chain with zero hum.

Any suggestions?

[Foamy]

Right, doesn't matter.
Some pedals are more sensitive to bad power supplies.

For example, I can use almost any pedal with a cheap-o power supply, but plug in a Boss Chorus? No go! Noisy as hell.

Try plugging in ONLY the LS-2 and see what happens.

Spend $20 on a OneSpot. Cheap, and it works like a charm.

[paulaviation]

Okay I tried the LS-2 on its own, I had two patch cables connecting the send/return inputs on it as to properly test the gain knobs.

The result? The hum is there, but I have to go to about half way for it to be really noticible, and it's very loud at full gain on both the A and B knobs, however its slightly louder when B is at full than when A is at full.

[Foamy]

If it's there with the LS-2, and not without, then the "problem" is the LS-2. Really, the problem is probably just a crappy power supply then.
Like I said, I've been able to get away with generic/cheap power supplies with most pedals, but not with specific Boss pedals.
OneSpot.
:-)

[bongomania]

It really does sound like your LS-2 has gone bad. FTR, it is possible to have hum/noise/interference problems with the 1Spot or ANY daisy-chain supply, so they are not a solution to hum/noise problems in general. But first it sounds like you need to replace the broken LS-2.

[paulaviation]

For the record I tried powering the LS-2 on its own, with a 9v battery instead of power supply. Still have the hum.