View Single Post
  #4   Report Post  
Posted to rec.audio.tech
Bill Graham Bill Graham is offline
external usenet poster
 
Posts: 763
Default Impedence matching problem


"Jens Rodrigo" wrote in message
...
"Bill Graham" wrote:
I am new to this group, so I apologize for asking a question than may have
been asked and answered many times before. I am a trumpet player, and I
would like to mike my horn and add a chorus effect to the output of the
mike, which I will then send to my 45 watt Beherenger keyboard amp and
speaker unit. I am using an Audio Technica PRO 35 R condenser mike which
has a low impedance output, since it requires a phantom power unit, and
when I put this signal into any of several chorus units, the result is
very
distorted, since all these units are made for electric guitars, and they
all
have high impedance inputs, as far as I know. What I would like to know
is,
does anyone know of a chorus unit that can accept a low impedance input
so
it can be driven by a condenser mike without distorting? Or, if not, how
can
I change the mike output to a high impedance so it won't seriously
overdrive
the chorus effect unit? I love the chorus effect, and it seems to me that
there must be some equipment combination that the pros use so they can
sing into, or play their acoustic instruments into a chorus effect unit
without
getting a lot of distortion. Vocalists must use this effect too, and they
would have to drive those units with microphones also.
I am Bill Graham, from Salem, Oregon.


We don't use matching in audio; see:
Interconnection of two audio units - Voltage Bridging or impedance
bridging - Zout Zin
http://www.sengpielaudio.com/calcula...gebridging.htm

Cheers Jens


Thanks, Jens......The article is interesting and informative.....But, I
still believe in "power amplifiers".....They get power from the wall to
multiply the audio power output of a signal source......I guess it all
depends on your definition of. "amplify".