Speaker Asylum

I'll see what I can find

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mhardy6647

In Reply to: RE: historically it was the default! posted by hahax@verizon.net on December 20, 2023 at 11:04:36

I can tell you empirically (only) tha the rolloff is smooth. XO on the "Burhoe modules" was first order on the tweeter (only) with a 10 uF capacitor (nomiunally 1800 Hz). I didn't calculate the XO frequency, it is from the link below, and may not be accurate. :-p

all the best,
mrh

https://www.humanspeakers.com/e/epi100.htm (Open in New Window)

Follow Ups:

welly, well, well -- here's what a quick googlage turned up :) - mhardy6647 06:36:04 12/22/23 (0)
Someone's measurement of the same woofer in the slightly larger EPI 110 enclosure. Not exactly what you're looking for (and, obviously not a laboratory measurement, nor a modern "spinorama"), but at least a little data to support the subjective impression (and the prevailing wisdom) about these drivers. HTH!

For reference, here's a photo of one of a pair of EPI 110 with woofers hich I re-surrounded with generic (three dollar) surrounds.

Proper replacement surrounds for these woofers are available (from Rick Cobb, e.g.) and are well worth the additional cost (still quite reasonable, less than $30 the pair).

Here's an EPI 100V that I re-surrounded with Rick Cobb's surrounds. The performance of this woofer should :) pretty well match the original performance.

I kept the 100Vs. Everyone should have a pair of these for reference, I'd opine :) They're epochal, and they don't take up very much space!

all the best,
mrh
- https://community.classicspeakerpages.net/topic/3078-epi-100 (Open in New Window)

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