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RE: New Amp

Posted by tube wrangler (M) on March 27, 2025 at 00:18:33

In Reply to: RE: New Amp posted by Triode_Kingdom on January 10, 2025 at 08:58:29:

I tried a few of the company in question. Their speakers are
using, in some cases, markedly inferior drivers as compared to
Altec or GPA drivers. Crossover networks and wiring can also
waste power.

I have also run into some of the speakers in question with
very high efficiency numbers that couldn't be driven by a common
2A3 SE amp that the mf'r had rated at 3.5 watts, which it easily
delivered across the usable audio bandwidth.

That much power should have
been overkill if the speaker's rated SPL numbers were honest.
They were not....

My GPA transmission-line cabinets will run super deep bass
all day long at about 8/10 watt. Clarity and definition is
absolutely the best. That 8/10 watt is driving the woofer,
the crossover network, and the horn-loaded midrange/tweeter.

I measured 105 db at 1.1 watts, at 30 HZ-- more than
I use to listen to music. Yes, all wiring is heavy gauge silver,
etc., so the system is efficient. I like this because I
demand absolute clarity.

Looks like nothing has changed! Quality is as quality DOES.

Personally, I have found that a great 15" woofer requires a
cabinet in the neighborhood of 11 or slightly more-- cubic feet.

Now, some of those speakers being discussed DO have large
enclosures (the expensive one!), but to me they're still
inefficient.

You can't beat the movie people! They play into large areas
sometimes thru screen materials. I owned a theatre which
seated about 360 people. The Altec cabinets were designed
into the screen, behind the screen fabric, and fired thru
it..

I designed the whole thing, and used 8 watts per channel max.

The system was LINEAR DOWN TO 20 HZ. It can be done, but
the "hi-eff" speakers you cite ARE NOT high-efficiency.

--Dennis--

Edits: 03/27/25

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