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you must have been using a pretty old echoplex, if the gain was set up like that. the new ones are quite different, and designed to easily handle +4, -10, and instrument levels. It is also designed to easily convert between +4 and -10, or -10 to +4, should you need to do that. The input is high enough impedance so a guitar or bass can be plugged directly into it. the latest EDP'seven have a built in limiter, which prevents accidental clipping of the digital path to the loop. For older units, you can easily modify the circuit to make the gain more manageable. the mod is detailed in the echoplex faq (been there for years actually). It just takes two resistor changes: http://www.loopers-delight.com/tools/echoplex/FAQ6.html people with old units have generally been much happier with it after doing that mod, I recommend that for your friend. No need for the transformers or level shifters you are recommending. kim At 10:28 AM 6/8/2002, William R. Walker, wrote: >I've read many comments from edp, jamman and rptr users complaining about >interface issues with instrument level sources (ie guitar amps etc). I >recently did a routing consoltation with a looper friend of mine who has >an >edp, a repeater, and a dl4. >all running through a small mackie board. What I noticed with the edp is >that it does'nt seem to have very high input head room, so one must keep >an >eye on levels going into it and keep the input volume down, to avoid >clipping. In order to get the signal back up hot enough, one must in >turn, >bring up the output volume, which will naturely increase the noise. This >was not a significant amount of noise, my old jamman has a similar lack of >headroom. However, if you were to plug your edp, or jamman, or repeater >directly into the front of a guitar amplifier, yikes, watch out! Much hiss >and noise will insue. The solution would be to place some kind of >transformer/line level shifter between the instrument and thelooper, and >the looper and the amp. You want to step up the signal from -10 to +4 >going >in to the looper, and step it back down comming out of the looper in to >the amp. Ebtech makes such a device (or made, in the current economic >climate, I'm not sure who is in business any more). The device is called a >line level shifter, and it will bump a -10db signal up to a +4db signal or >vice versa. very handy tool that will keep noise at bay. The unit is about >the size of a large direct box and they do make a multiple input rack >mount >version as well. I know I've posted such info before, but I thought I'd >run >it by again for the newbies. >Bill ______________________________________________________________________ Kim Flint | Looper's Delight kflint@loopers-delight.com | http://www.loopers-delight.com