Powell wrote:

"Matt Zach" wrote


I am looking at my first tube amp. It delivers 40 wpc
class A. I own an inefficient pair of A/D/S 810 speakers.
Will I have problems with this amp driving these speakers ?


The ADS L810 is a three-way acoustic-suspension
speaker (1981). This is an efficient 6 ohm speaker
(94 dB SPL/W/m) with a power rating of 100 watts,
200 watt peak. 40 watts of tube power should be
sufficient for a normal sized room unless you play
your music at excessively loud levels.

So that means 94+16=110db out of a 40 watt amplifier. Even
at 10 watts, that's 106db.

I run a set of big 6 ohm speakers like this as well with
three Yamaha CA series power amplifiers. They are rated
at ~20-25wpc in class A mode, IIRC. 5 channels of this
is hellishly loud for movies or music - with the meters only
registering 10 watt peaks, my neighbors complain.

Things rattle and the windows vibrate by this point.
My main speakers are 93db efficient 3 way JBL monitors,
which are fairly close to the ADS L810s in SPL and efficiency.
I once wound it up to 100wpc in A/B(standard) mode - and you
could hear it 500ft away like it was in the next room.

Once. Lol.

40wpc class A should be plenty. If he likes tubes, good
for him - it's not hard to get a small tube amp like this.
Me? I appreciate both, but I like old fashioned transitors
the size of a walnut. Heat handling is a big plus for me.

Now, where did I put that picture of that 100,000watt tube?