Home Speaker Asylum

General speaker questions for audio and home theater.

If you have (real) Altecs -- no need for Klipsch! ;)

That said -- I, too, would like to get my ears on the Cornie IV (or even the current Heresy morph).
As many folks know, a pair of 1974 Cornwalls got me to low-power/SE amplification (in a semi-successful attempt to tame those screetchy beasts).
And that led, inexorably, to Altecs :)

Klipsch, at least in recent years, is famed for optimistic sensitivity claims -- although, in fairness, I think the company line is that real-world room effects are factored in to their claims.

From JA's assessment of the Forte III (not the current Forte IV) in 2019:
The Klipsch's specified sensitivity is an extraordinary 99dB/2.83V/m; my estimate was lower, at 95.2dB(B)/2.83V/m, but this is still 8dB higher than the average sensitivity of the speakers I have measured over the past 30 years. This speaker will play loudly with a mere handful of watts. Klipsch specifies the Forte III's nominal impedance as "8 ohms compatible." I found that the speaker's impedance magnitude (fig.1, solid trace) dropped below 6 ohms only in the upper bass and in the valley between the twin low-frequency peaks that define the reflex woofer loading. The minimum value is 3.65 ohms at 125Hz. However, the electrical phase angle (dotted trace) is sometimes extreme, and there is a current-hungry combination of 5 ohms and -49[degree] phase angle at 90Hz. Despite its high sensitivity, the Forte III will work best with amplifiers that are comfortable driving 4-ohm loads.
see link below for source.

And this also, from JA's 2019 assessment of the Klipsch Reference Premiere RP-600M loudspeaker:
The Klipsch's specified sensitivity is an extraordinarily high 96dB/2.83V/m. My estimate was much lower, at 89.6dB(B)/2.83V/m, though this is still higher than is typical for a small two-way speaker.

https://www.stereophile.com/content/klipsch-reference-premiere-rp-600m-loudspeaker-measurements

JA almost sounds like he's channeling the... umm... diplomatic prose style of the late Julian Hirsch of Stereo Review in that latter comment. ;)



all the best,
mrh


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  • If you have (real) Altecs -- no need for Klipsch! ;) - mhardy6647 12/8/2104:48:29 12/8/21 (0)

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