Class A 30 Watt Amps: Are they enough to drive my book shelfs?


Currently looking at buying a Pass Labs XA 30.5 to drive my Kef 201/2 speakers which are rated at 86 DB sensitivity.  Is this a bad move?
puffbojie

Showing 1 response by delkal

In real life a 3 dB gain is not much (and you need to double the power to get it). 3 dBs is generally regarded as the minimum change most people need to hear a difference when playing music. Play around with an AVR with the volume calibrated in dBs. Go up and down 1 db on the dial. I doubt you will hear a difference. And when you are listening and someone asks you to "turn it up just a little" if you turn it up 1 dB they will look at you funny.

People are way too hung up on watts. In most cases it is just a marketing ploy. Why would you buy a 100 amp receiver when you can get a 160 amp receiver? But what they don’t tell you is you will never hear that difference. Doing the calculation those 60 extra watts will only give you an extra 2 dBs when playing both amps at max volume (just before clipping). If you can hear that difference you have better ears than I do.


An amp having an ample power supply and good reserves to power the peaks are way more important than published watts.   From what I hear the OPs amp has a great power supply and reserves. I would prefer it to a 100 watt amp with an undersized power supply and cheap power caps.   He should be fine.