Re: What to buy, what to buy
- From: Jim <askme@xxxxxxxxxxxxxxxxx>
- Date: Wed, 06 Sep 2006 11:44:29 -0700
Joe D. wrote:
Until Christmas, you might try:
in series with
FORGOT: Put the series tweeter/resistor parallel to your combo speaker,
Before you do any soldering, you may want to twist wires at the tweeter
and check for phase response. If the tweeter is out of phase, you may
(or may not) notice a slight drop in response at the crossover point
(which looks to be 3.5k). You can try both polarities to see what
sounds best to you.
Now, the soldering:
If there's an extension speaker jack that does NOT cut the combo
speaker, solder the resistor to either terminal of the tweeter. Solder
the other end of the resistor to one side of your speaker wire. Solder
the other speaker wire to the unsoldered tweeter terminal. Solder the
other end of the wire to a 1/4" jack, being CAREFUL that you don't have
a short when you put the cover on the plug. Plug into the speaker
extension, and VIOLA! You have a full range amp.
If this is the case on my amp (I don't think it is), shouldn't I be
able to simply BUY a small external tweeter speaker and plug it in? Is
that essentially what you're saying?
If it is a piezo tweeter, you are good to go. If it is a standard tweeter, you'd need a crossover, and it could affect the impedance load on the amp (but is probably nothing to worry about). Piezo designs are NOT hifi, but the advantage is no crossover is required, and they won't load down the amp. They are common in lower to mid priced acoustic, keyboard and bass amps, and lower priced PA/karaoke type speakers.
If your amp does not have the extension speaker jack, or if plugging
into that jack kills the combo speaker, omit the 1/4" plug and wire
directly to your combo speaker (if your combo happens to have more than
one speaker wired in series, wire to the terminals where the amp speaker
cables are connected).
I don't have an external speaker jack. I DO, however, have an 'input'
jack. Never used it, but the guy at GuitarCenter told me it was to
enable me to plug a soundboard into?
NOT what you want.
The amp is an XT10W; I don't think
they make it any more, but the XT15W DOES have an external speaker
jack, which leads me to believe the XT10W doesn't, or it would be
labelled as such, right?
So let me se If I got this straight; assuming I DON'T have an external
speaker jack, and I want to try this (wire it in with my existing 8"
speaker), then I:
- Connect one end of the resistor to one terminal on the tweeter
- connect speaker wire to a) the other end of the resistor, and b) the
other terminal on the tweeter
- connect these two wires to the terminals on the existing 8" speaker
on the amp.
You got it!
As with all speaker wires, DO NOT SHORT the wires together. I use heat
shrink tubing on all of my solders. If you do this right, it is a CHEAP
way to convert a guitar amp to a full range amp.
Last question: I don't have a lot of room in the amp to place the
tweeter. You're not suggesting that this is external to the box, are
you? Would that sound good at all?
Your tweeter doesn't know if it's mounted on the baffle or sitting on top of the amp. In practice, you want to aim the tweeter with the aim of the speaker, and you want to keep it as close to the speaker as possible. If you have too much separation, or if you point it at your ears and the main speaker straight ahead, it'll sound unnatural. For experimentation, see if the back of the tweeter will sit on the handle and point (more or less) straight ahead. If you love it, and have no room on the baffle, improvise. The goal is close to the main driver pointed in the same direction.
Another suggestion if you wire directly to the speaker: Put in a simple SPST switch to turn it on or off. It'll sound harsh with electric guitar.
Forgive the naive questions. Thanks for the advice.
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