So far just playing at ‘better half at-home’ volumes. I’m playing mostly vocals (ie Norah Jones / Diana Krall / Sade) and placing my head directly in front of each speaker (~3 ft) going back and forth trying to differentiate. I’m not hearing the difference I thought I would (credit to the AudioNirvanas on their high extension - and/or age of my hearing). As mentioned previously the ESS Heils are very clean and open- my personal bias is I’ve been a fan of dipoles (old maggie fan). When I pull back a bit any issue (maybe just mental) with the ESS physical separation from the woofer playing upper mids is a non-event. Grok calculates with 3rd order Butterworth high pass @800 with 1st order low pass on the woofers @600 (one driver reversed) phases are 180 vs 179 degrees. So extremely coherent moving off-axis.
I like the ‘concept’ of one driver carrying 380Hz up. No crossover anywhere near 1kHz - 4kHz, and vocal range (mostly) point sourced towards listening height. But also ‘know’ that the AN’s won’t be as quick (detailed) as the ESS Heils.
Eq’ed and gain adjusted very close left vs right I’m enjoying the combo mix for a bit. Next up going with ESS Heils for both sides, and crank up the volume.
While a 3rd O high pass Butterworth (combo 1st O passive line-level with 2nd O active Butterworth - both targeting 800Hz) provides significantly more attenuation below ~600Hz than a 2nd O LR 800Hz, above it’s pushing the Heil a bit more. But maybe only plus a dB @ 1500Hz.
(if I did this correctly: yellow LR2, green Butterworth 3rd order)
I’ll be revisiting to get the crossover frequency @ 800-850ish down 6dB. I like the phase relationship one can get with a 3rd O (~800Hz) with 1st O (~600) Butterworth.
Measured actual Xover of drivers ~835Hz. Interestingly playing with GROK /AI for setting delay on the ESS Heil relative to both its ctr forward position (vs the front woofer position) and the crossover relationship (3rd order high pass net on the ESS Heil at ~835HZ, and the 1st order on the woofers (1.5 way) at ~ 482Hz. Active advantages.
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Copy , noted . Curious how it sounds up and running.
So far just playing at ‘better half at-home’ volumes. I’m playing mostly vocals (ie Norah Jones / Diana Krall / Sade) and placing my head directly in front of each speaker (~3 ft) going back and forth trying to differentiate. I’m not hearing the difference I thought I would (credit to the AudioNirvanas on their high extension - and/or age of my hearing). As mentioned previously the ESS Heils are very clean and open- my personal bias is I’ve been a fan of dipoles (old maggie fan). When I pull back a bit any issue (maybe just mental) with the ESS physical separation from the woofer playing upper mids is a non-event. Grok calculates with 3rd order Butterworth high pass @800 with 1st order low pass on the woofers @600 (one driver reversed) phases are 180 vs 179 degrees. So extremely coherent moving off-axis.
I like the ‘concept’ of one driver carrying 380Hz up. No crossover anywhere near 1kHz - 4kHz, and vocal range (mostly) point sourced towards listening height. But also ‘know’ that the AN’s won’t be as quick (detailed) as the ESS Heils.
Eq’ed and gain adjusted very close left vs right I’m enjoying the combo mix for a bit. Next up going with ESS Heils for both sides, and crank up the volume.
While a 3rd O high pass Butterworth (combo 1st O passive line-level with 2nd O active Butterworth - both targeting 800Hz) provides significantly more attenuation below ~600Hz than a 2nd O LR 800Hz, above it’s pushing the Heil a bit more. But maybe only plus a dB @ 1500Hz.

(if I did this correctly: yellow LR2, green Butterworth 3rd order)
I’ll be revisiting to get the crossover frequency @ 800-850ish down 6dB. I like the phase relationship one can get with a 3rd O (~800Hz) with 1st O (~600) Butterworth.
Now have the ESS Heils on both sides.
Measured actual Xover of drivers ~835Hz. Interestingly playing with GROK /AI for setting delay on the ESS Heil relative to both its ctr forward position (vs the front woofer position) and the crossover relationship (3rd order high pass net on the ESS Heil at ~835HZ, and the 1st order on the woofers (1.5 way) at ~ 482Hz. Active advantages.