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From: Javier Argomedo
Date: Mon, 10 Apr 2000 19:06:32 -0400
Subject: Re: (Long; LHC) Upon further cosideration . . . (was '59 Bassman
RI)

From: "Steve Gilliland"
Subject: (Long; LHC) Upon further cosideration . . . (was '59 Bassman
RI)

> ...
> Champ through the house PA. I have the requisite equipment: a small mic
> stand, an SM-58 knock-off, and the proper cord(s). What are your feelings
> about this approach?
>
> I'm concerned about feedback....
> ...
> Champ alone, can I expect the same results when mic-ing through the PA?
Or,
> is it a whole new ballgame?
>
> What would you recommend as a starting point for mic volume, Champ volume,
> and PA volume? For example, should I start with the mic at low volume,
the
> Champ at mid-volume, and the PA at low volume, then dial in my sound
> accordingly. When I start to make adjustments, where do I begin -- with
the
> mic, the Champ, or the PA?
>
That's exactly what I do, I play trough my Piazza modified Jt30 into a
SF champ (converted to tweed, getting out the tone controls and a couple
of caps if my memory is ok), then mic-ed to the PA using a sm57.
I don't use a mic stand, I use one of those clamps used mainly for
drums, you just clamp it to the amp chasis the then adjust the mic
position (not right towards the center, slightly uncentered to get more
of the bass response), that's another advantage of the mic clamp, it
will take actually more bass as it's clamped to the chasis (at least
that was what the guitarist told me :).

Ok, the volume setting, when I play I sometimes take the sm57 apart and
play directly into it (whether on a stand or holding it), so that's my
volume reference, when we do sound check before playing I try to get the
same volume as the vocalists and guitars (we have two guitar gitar
players, one with a 135watts twin reverb and the other with another
similar, so you can imagine how dificult is for me to be heard). Ok, I
adjust the volume to somwhere between voices and guitars... then I put
the mic back to the amp and try again (I use the amp mainly as a
monitor) and try to get the same volume adjusting the amp pot, somewhere
between 4 and 5 usually (I have a 12at instead of the ax pre amp tube,
it's 30% less gain, so for a standard champ should be between 3 and 4,
mmm but I got out the tone circuit so it has a slight gain increase...
but you'll see).
I use a long chord so I don't have feedback problems, you can always
point the amp the way it doesn't feedback and still hear what you're
playing from it.

Hope it helps,
cheers.

- --
Javier Argomedo - jargom~so.org - European Southern Observatory
Blues Harp at http://www.freeyellow.com/members6/harping/ ICQ# 6861793
- -- Casilla 1117, Vina del Mar, CHILE, Earth, Solar System, Milky Way. --