Re Catalinbread Echorec . . . . .

[Terry B]

Hi Dave, can you explain to me (I must be thick!) but how does any guitar effects pedal help impedance matching - isn't the output from the pedal meant to be fed direct to a guitar amp? Which means you still have the problem of inputting the effects unit output into a mic input on the Zoom RFX2200. Oh, and by the way, has anyone thought about the effect of capacitance of the guitar lead - that can have a dramatic effect on tone in much the same way - too much or too little treble depending on whether the capacitance of the lead is higher or lower than ideal. I used to have the same problem in the old days of turntables and arms matching the impedance of the cartridge to the hi-fi amp!!! You used to be able to buy adaptors the raise or lower it. Is there anything like that for guitars? Surely there must be a simple mod the input socket that would solve this! Any electronics experts please advise!!!

[dave robinson]

Hi Dave, can you explain to me (I must be thick!) but how does any guitar effects pedal help impedance matching - isn't the output from the pedal meant to be fed direct to a guitar amp? Which means you still have the problem of inputting the effects unit output into a mic input on the Zoom RFX2200. Oh, and by the way, has anyone thought about the effect of capacitance of the guitar lead - that can have a dramatic effect on tone in much the same way - too much or too little treble depending on whether the capacitance of the lead is higher or lower than ideal. I used to have the same problem in the old days of turntables and arms matching the impedance of the cartridge to the hi-fi amp!!! You used to be able to buy adaptors the raise or lower it. Is there anything like that for guitars? Surely there must be a simple mod the input socket that would solve this! Any electronics experts please advise!!!

Terry, I too had the free effect pedal when I bought the ZoomRFX 2000 and it did make a difference but not the desired effect. I kept the Zoom as a studio tool and it has served a purpose for other uses.
I realised when I bought the ESE Echomatic about the input matching business, my guitar began to sound 'proper' once again and I soon worked it out where the problems were, never looked back!

[Bojan]

Dave, this is a kind of related question. When you play through your eTap2hw and Tonelab into your PC or amp (or Bose system), where do you plug in first, into the etap or into the Tonelab, and what would be the difference?

Bojan

[RayL]

Hi Dave, can you explain to me (I must be thick!) but how does any guitar effects pedal help impedance matching

The rules are:

Feeding a high impedance into a high impedance is OK.

Feeding a high impedance into a low impedance is NOT OK

Feeding a low impedance into a high impedance is OK

Feeding a low impedance into a matching low impedance is OK


Things that can be considered high impedance include:
Guitar pickups, Effects pedal inputs, amplifier inputs

Things that can be considered low impedance include:
Microphones, microphone inputs to amps and mixers, effects pedal outputs.

So plugging a guitar into an effects pedal is good (high into high) and the low imp. o/p of the pedal will match into anything (provided it does not overload it).

In fact, guitar pickups are really 'medium impedance' (7K -15K) but if they feed into a high impedance input (at least 100K and usually much more) then that is still the right way round.

Ray

[ecca]

Boyng, it's about time you got your feet wet and bought one.
The input impedance of a Valve Eccamatic eTap2hw is 1 megohm.

Dave.... You're going to love the valve hybrid.......

[Didier]

has anyone thought about the effect of capacitance of the guitar lead - that can have a dramatic effect on tone in much the same way - too much or too little treble depending on whether the capacitance of the lead is higher or lower than ideal. I used to have the same problem in the old days of turntables and arms matching the impedance of the cartridge to the hi-fi amp!!! You used to be able to buy adaptors the raise or lower it. Is there anything like that for guitars? Surely there must be a simple mod the input socket that would solve this! Any electronics experts please advise!!!

There was a document about this on Goran Tanring's site, but it's not there anymore. I had saved it and you'll find it here : http://www.4shared.com/office/YOb7A72W/ ... lator.html

I don't know anyone who tested it to see how it works...

Didier

[kipper]

amanda nows how to build one. peter

[ecca]

Wouldn't it be more straightforward to change the lead ?

[Bojan]

Can anyone answer my question in post #13 please?

What is the sequence:

guitar>echo unit>amp modeling unit>PA (or PC, or amp) or

guitar>amp modeling unit>echo unit>PA (or PC, or amp)

. . . and what would be the difference?

[dave robinson]

Dave, this is a kind of related question. When you play through your eTap2hw and Tonelab into your PC or amp (or Bose system), where do you plug in first, into the etap or into the Tonelab, and what would be the difference?

Bojan

Hi Bojan, I always go from the guitar to the echo device and then to the amp - whether it be my Boogie, Vox AC30. But if using my Bose, the Tonelab goes before the Bose, It works right that way, but I would rarely use the Tonelab as well as the Etap or any other echo device as the Tonelab is an echo machine on it's own.