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Impedence output from pedals

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Chris C
Jan 01, 2010 10:03 AM GMT

I have been investigating analog delay pedals and a question about pedels in general has sprung to mind. I have noticed that most pedals have v high Z (Impedence) input but there seems that some have lower Z output. My question is if you have such a pedal in your effects chain before going to your amp or pre-amp, will that negitively affect your tone?

BTW there seems to be a plethora of new low cost delay pedals. Ok so they are not DM-2s or Lone Wolves but some get very good reviews on Harmony Central.



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Comments (3)

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Jan 01, 2010 6:08 PM GMT
Barbeque Bob M Replied:

It very well can and often will introduce unwanted noise to the signal. Part of this tho, depends on the mic you use. If you use mics with crystal/ceramic cartridges, they are of ultra high impedance, and the minimum needed to match their impedance is 1meg, and other mics will be lower. It's important that you find these things out first and also using the correct power adapter for the pedal is equally important and don't just go under the assumption that even though the connector looks right that it'll be the correct adapter because some adapters have a wide range of milliamp (ma) differences and that may well introduce both noise and/or make them totally unusable.



Jan 01, 2010 8:27 PM GMT
John P Replied:

I get the best results from true bypass pedals that have no signal buffer. But i don't play bullet mics with crystal or ceramic cartridges like BBQ Bob is talking about. Also, in general, pedals will sound better and are more reliable with AC power instead of batteries.

This low impedance pedal output stuff is designed to carry a signal from a guitar pickup over longer cable runs with less signal degradation. i don't pretend to understand how it works or why it works going into a guitar amp, but i don't think it's designed for a signal generated by a microphone. Personally, I get best results all the way around with true bypass pedals (no tone suck, less feedback, less gain change when the pedal is engaged and disengaged). But YMMV. The only non true bypass pedal I use is a MicroPOG. All my others are TB.

Btw, most reviews on HC are by GUITAR players. All guitar pedals are not harmonica friendly. What works/sounds great for guitar may not work well or sound good for harp. It's sort of a trial and error thing.



Jan 04, 2010 4:06 AM GMT
OrthodoxBlues Replied:

So far, the various delay pedals I've used have sounded great for harmonica, but they mostly were fairly pricey guitar pedals. I now have a crystal mic, but I didn't then, so I'll have to recheck with it. I believe I did have trouble with a friend's inexpensive Artec analog delay pedal, perhaps for some of the reasons listed here. A few years ago, ToysRUs sold First Act delay pedals for kids wanting to try guitar, and the guitar forum members discovered that this inexpensive pedal was quite good. Mine was modified to eliminate its biggest weakness, which was volume loss when engaged. I've tried it, and thought it was quite good for harmonica, although not close to the sublime DM-2. Chris, if you find a good inexpensive one, please let us know.




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