[mab1376]

Can someone explain to me why you get higher output from higher impedance phones with an OTL amp?
 
I am in no way an electrical engineer, so layman's terms please.

 

[kramer5150]

form one laman to anothr 

  High impedance cans need higher voltage and lower current.  This typically is what tubes do, they are (relatively) high AC voltage output devices, with a (relatively) low current ceiling.

 

[mab1376]

Cool thanks!
 
So now whats the function of a Power and Driver tube?

 

[kramer5150]

I think (and don't quote me on this, let others correct me and fill in the details)... driver tube provides current (albeit in limited quantity), the power tubes provide voltage swing.  Together they create wattage.  again lamens analysis.

 

[mab1376]

One thing that kinda struck me as strange was on the Woo site, it says for a the WA22, upgrading the rectifier tube has a beneficial effect on sound.
 
Doesn't the rectifier just convert AC to DC? how would that stage of the amp effect sound?
 
http://www.wooaudio.com/products/wa22.html
 
 
 
Sophia Princess Mesh Plate 274B rectifier
Quote:

Wide open soundstage, full body, silky smooth, a great combination with the above tubes. Buy and ship independently. Sophia Electric™ 274B tube is a premium rectifier tube for a 5U4/5R4/5AR4 direct replacement with 3X longer plate structure, thus it has a deeper, wider sound stage and even smoothier sound than Mullard 5AR4.

 

[JKDJedi]

"tubes don't handle low impedance very well"