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Class A bias, speaker sensitivity, watts...?

Hello

Please help me understand the relationship between Class A bias and wattage output. I recently bought a used Vincent Audio SV236MK used for a great price. The specs state 150 watts into 8 ohms, 250 into 4 ohms, and the first 10 watts being Class A @ 8 ohms.

My speakers are Sonus Faber Lumina II which are rated as 4 Ohm with 86db sensitivity. Everything is set up in my small cube shaped office. I used a DB meter on my iPhone and found that when I turn the volume up to what I consider to be "loud" the peak measurement I get is 80db and under.

 

Given the specs above, am I hearing mostly/all Class A watts while listening?

craigvmn

Showing 1 response by oberoniaomnia

oberoniaomnia
161 posts
 

Re current capabilities, is there a measurement, or some type of spec number? I would imagine that the µ/m-Farad value of the caps would be an indicator, but then there is also the maximum discharge speed F/s (= slew rate???) playing a role.

Capacitor values are not frequently given in specs. Tried to find it for my Pass XA25; there was a bulletin board mention of 18x 10K µF caps = 180 mF. If correct, is that a lot or not? Not the foggiest. How is discharge rate affected by cap size? I would imagine that many small caps discharge faster than one large one (assuming same total F value).

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