6adc6b55   
   XPost: uk.rec.audio   
   From: zekfrivo@zekfrivolous.com   
      
   In article <391de1c5-e041-41b1-8f8e-42912563c40c@g18g2000vbn.goo   
   legroups.com>, Andre Jute  wrote:   
   >Paul G asks:   
   >"[W]hat is the best way to protect a   
   >speaker from destruction if the amp is sufficiently powerful, and you   
   >have no control over volume? It happens.... the kids have fun with   
   >your stereo, the grounds come loose on the inputs (huge buzz), the   
   >system oscillates, etc."   
   >   
   >I don't know if you want to design and build your own stuff from   
   >scratch, Paul, or merely want to buy a plug-in protector. If you can   
   >solder, here's a halfway house in a couple items to protect your   
   >loudspeakers from switch-on pops and from DC.   
   >   
   >Velleman K4700 Loudspeaker protection kit, stereo with switch-on delay   
   >   
   >Velleman K4701 Loudspeaker DC-protection, mono   
   >   
   >The reason I've identified them is that I have a QUAD 405 MkII which   
   >occasionally eats an ESL-63, which soon gets expensive, and it is   
   >tricky rebuilding them because here is no way to solder except over   
   >the fragile panels... So an audiophile's fancy turns to ripping out   
   >the 405's inadequate clamp circuit and replacing it with industrial   
   >strength protection.   
   >   
   >The reason I choose Velleman is I've built some of their kits,   
   >including the multimeter I've used for years and a 100W PP tube amp,   
   >and found their stuff first class, head and shoulders above the   
   >competition (well, in most cases there is no competition, because the   
   >other guys make crap); in the end Velleman is worth the premium price.   
   >   
   >Andre Jute   
   >I just listen to one channel at a time. You do have to listen twice.   
   >Adequate stereo separation. -- Al Marcy   
      
   For a solid state amp, I usually put in a fuse on the speaker lines,   
   only if I feel its necessary. The fuse is not a sure thing, and you have to   
   use the right value. It can save speakers some of the time.   
   The Velleman devices have nothing to do with over volume, unless the   
   overvolume cause a shift in average DC offset.   
      
   greg   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)