stevew
Joined: 11 Sep 2006
Posts: 7
|
 Posted:
Mon Sep 11, 2006 5:18 pm Post subject:
Trying to operate 2.1 computer speaker system with battery |
|
|
Hi folks,
My name is Steve and I'm new to this group, and though I have some
electronics background, I'm seeking some specialized information
that maybe someone in this group could provide me with.
I'm trying to create a portable PA system that will ride in a
stanard backpack. The purpose for this is to amplify musical
instruemnts (such as an electic guitar) when out of reach of grid
power. I know that there are battery powered amps for sale, but I'm
trying to build a system that one can carry on their back, with
inexpensive components.
I purchased a Cyber Associates 'self-powered' computer speacker
system that consists of two mid-high frequency stereo speakers and a
single sub-woofer from ebay for $12. Using a battery-powered preamp,
I can get a line-level signal from the gutiar to input into this
speaker system. This works fine when using a wall-wart to power the
speakers, but when I try to use 6 1.5v 'D' cells in series to give
me the required 9v DC supply voltage, the voltage falls to around 4v
and won't turn the system on.
I'm assuming that too much current is drawn, and thus the D cells
are not powereful enough for the job. The wall wart specifies 750mA.
I'd like to use an inexpensive rechargeable battery (or batteries)
for the job, but I don't understand the system reqirements, or
battery principles well enough to know what to get.
I'm thinking that a 9.6v rechargeable drill battery might work (I
know that they're designed for high current output), but I'm
hesitant to buy one before I know it's likely to succeed.
I'm also wondering what the consequences of using a higher voltage
battery would be, for instance 14.4v or 18v. Would I blow the
speaker system?
Any insight on this would be very much appreciated.
Thanks,
Steve Wells
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in
