9v or 12v????

[wazzel]

Just got my PP2 installed and wired. Looking to see what pedals I can run at 12 volts and which ones will benefit from the extra voltage. The chain in order is

Bass (EB stingray 5 or sterling 5)

Boss TU-2 (9v only, just added for complete list)
EHX POG2 (9v only???)
MI Neo Fuzz (9v only???)
Subdecay Prometheus (9v or 12v confirmed)
Barber LTD (9v or 12v confirmed)
Analogue man standard chorus (9v or 12v confirmed)
Boss BF-3 flanger (9v only???)
Subdecay Echobox (9v or 12v confirmed)

Amp (GB shuttle 6.0 12T)

I am thinking the Analogue man Chorus and the Prometheus are going to benefit from the extra voltage.

Any others?

[Mark Olson]

A little extra voltage can give you a little extra headroom and sometimes more clarity. Try it out with the pedals you know you won't fry and see how you like them best.

[megadan]

There's no benefit to using the POG (digital) or the bosses at 12v, but as said the others could gain headroom.

Personally I don't hear a difference using my Diamond bass comp at 18 or 24v and 9v.

[aledeville]

What exactly is headroom in a pedal?

[Silent Fly]

Originally Posted by aledeville

What exactly is headroom in a pedal?

The best and simpler definition I found is this: "The amount of additional signal above the nominal input level that can be sent into or out of an electronic device before clipping distortion occurs."

Even if it is not formally accurate, in practical terms it can be described as the maximum signal level the pedal can manage without clipping.

In both definitions "clipping" is not the clipping generated by an overdrive/distortion/fuzz. With this type of pedal the clipping kicks in "artificially" at a level usually independent from the power supply.