amp hiss impact on speakers

Uh, guys it's APRIL FOOLS DAY.

Wait- what? So you mean REL can't cure cancer??? 

😩

@millercarbon
Room correction or anything else you mentioned does nothing to get rid of the hiss from the speakers. What will a sub do to get rid of the hiss when it’s coming from the tweeters? Is the person running tube electronics, if so, that is probably the cause.

Right. Good catch. Brilliant! Running tube electronics is definitely the deciding factor. Tip of the hat to you, stereo5! Which tubes do you recommend for the longest tweeter life?

Oh. M. G.
and I don't say that. 

Tweeters are usually specified as being able to handle many watts, within their specified frequency range. For example consider this datasheet for a tweeter that is used in a very small stand-mounted speaker made by Salk (model WOW1). The datasheet indicates that the tweeter is rated to be able to handle 100 watts when used with an appropriate crossover network that would keep low frequencies out of it.

Since you only hear the hiss when your ear is very close to your speakers it would seem safe to assume that at the usual 1 meter measuring distance the hiss level is **well under** say 40 db. But let’s assume it is 40 db. Given a tweeter sensitivity in the area of say 87 db/1 watt/1 meter, which is the spec on the tweeter I linked to, it can be calculated that the tweeter is producing the hiss in response to an input in the rough vicinity of one fifty-thousandth of a watt, i.e., 0.00002 watts!

The bottom line: It’s a non-issue.

Regards,
-- Al