thanx: RE: [sdiy] ot: please recommend a low power pentode power amp circuit

[James Patchell]

I try to avoid getting involved in these threads...

But.....

A speaker is nothing more than a Motor....yep, a linear motor, with a 
spring (to keep it centered).  There will be many factors that determine 
how easy the speaker is to drive.  But you can't forget about the magnet 
and the voice coil (which, is the motor).  My experience has shown quite 
the opposite, however, from what you stated.  I noticed that generally the 
bigger the speaker, the easier (less power) required to drive it....however 
bigger speakers generally also have bigger magnets and coils....

-Jim

At 03:09 PM 8/15/2003 -0600, Brousseau, Paul E (Paul) wrote:
>Also, recall speaker efficiency.  I think (no PhD here, only a BS...) that 
>a smaller speaker (i.e., headphone) will be easier to drive than a 10", 
>12", or 15" speaker.
>
>--PBr
>
>-----Original Message-----
>From: Nils Pipenbrinck [mailto:np at inverse-entertainment.de]
>Sent: Friday, August 15, 2003 6:04 AM
>To: Synth-Diy
>Subject: AW: thanx: RE: [sdiy] ot: please recommend a low power pentode
>power amp circuit
>
>
>I refused 'cause I don't liked the idea to build an amplifier that can
>permanently ruin the ears. Now he has 300mW, and I doubt he ever pushed it
>harder than 100mW.