I gassed for the Wah Probe ever since I heard about it. The thought of a boostable wah without a treadle from the mad scientist Zachary proved too tempting to resist. After many attempts to snipe one on ebay, I was finally successful earlier this week.
I've had a little time to fiddle with it. Here are my findings so far:
1.) Despite Mr. Strange's experience, I found it does NOT suck low end out of my tone. It's pretty transparent. I play a late 80's G&L L2000, passively; YMMV...
2.) The sweep range is long, provided you have the foot control to sweep slowly. Even a totally clean tone can be very effected with this device.
3.) Bongomania's scenario would only apply if you're trying to get a "cocked" or "partly open" wah sound. A regular treadle wah would be easier to use in that context, but if you're actively "wah-ing", his concerns don't apply. After all, this IS a wah pedal...
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4.) ZVEX pedals are built like tanks, and while I've never had a problem with them (I've got an early Woolly Mammoth that's regularly abused), I've read accounts of his ready willingness to provide repairs at little expense to the user were they to fail in some way.
5.) While it does have a slight learning curve (mostly with regard to getting used to where and how to position your foot), it's not rocket science. Practice...
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Tayste, your best bet is to play one for yourself and see if you can deal with it.
--- Victor