[Eeyore]

Trevor Wilson wrote:

"jakdedert" wrote in message

I know, I know...but for $9 in good shape at the thrift store, I figured I
couldn't go wrong. No way to test, but the surrounds were in excellent
condition; so I figured at least the woofers alone were worth $4.50 each.

Brought them home, hooked 'em up, they made noise...so far so good, but
where were the highs? AWOL...crap, blown tweets! Not so fast....

Tested the tweeters with 9v battery--fine. Okay, time to open the box.
Pulled the surprisingly flimsy woofer from the 1/2" MDF box In addition
to the minimal x-over components (resister and cap in series with the
tweeter) was a #561 automotive 'festoon' style lamp in series with the
tweet. Shorting that brought back highs.

Now considering this was a series limiter, should I replace it, or just
bypass? The lamp
http://www.bulbtown.com/561_MINIATURE_BULB_RIGID_LOOP_BASE_p/561.htm is
a roughly 12 watt unit with apprx. 1000 hours rated life. Did it 'fuse',
or just wear out?

Strange stuff, this Bose....

**Just whack a 070 PolyswitchT in place of the lamp you'll be sweet. There
might be a slightly noticeable increase in HF, but I doubt it. The
Polyswitch will last a very long time.

The Polyswitch guys actually do/did an app note on tweeter/driver protection
inluding using bulbs as well ! Polyswitches on their own tend not to 'reset'
very well you see, whereas bulbs do.

Graham