I just replaced the speaker in both of my 909/398's. Got the
replacement speakers for $1 each. Amazing difference. If you go
he

http://www.acidplanet.com/artist.asp?PID=673036&t=9611

and press play, you can hear the difference.

If you wish to read about my play-by-play on the replacement...it is in
recent messages posted to the Yahoo 398 group.

I am not much of a techie and I was able to make this repair. If II
can help you further let me know.