GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: For one day only

Post Subject: Elaborate S2 on 600 Hz hornPosted by skushino on: 3/10/2013

Romy wrote:

For Vitavox S2 to use Tractrix 600Hz with 1.5KHz filter is a bit too close in my view unless you stay with second order filter.

Would you elaborate further about your warning? I'm very interested in this application.

I think you use the S2 on a 400 Hz tractrix from 1k - 12k or so (I don't remember your PLXO slope). If this sounds acceptable using a 1st order filter, it seems the Brits configuration above would be similar in coverage demands, just working in a different bandwidth:

1) 600 hz horn is a half octave higher than your 400 hz horn, and

2) 1.5k is a half octave higher than your crossover at 1k

I always felt my Edgar 350hz tractrix / jbl 2441 could do better. The sound was slightly too heavy and ponderous, maybe a little gray sounding. It wasn't a deal breaker, but stringed instruments especially needed a lighter touch. I recently changed to 600hz tractrix / coral m-100 running electrically filtered ~ 2100hz (acoustic ~ 900hz). It's still new, and I'm learning about the new combo. First impressions are positive - much more to my liking. There's a lightness and touch of sweetness now - just what I needed. It's more agile and golden sounding. Not yellowish like a phenolic phragm, just a shimmer. So far so good.

I need to work on a seamless transition to the lower mid / upper bass channel. My UB channel is fane studio 8m loading 142hz tractrix. When I get home (I'm traveling now) I'll try my smaller faital driver again in place of the fane. I remembered the faital being able to go higher than the fane in this horn. I have a hunch I'm pushing the edge running my 600 hz horn down to 800, 900hz.

So, I'll rephrase my question - based on your experience, how low can the 600hz horn go before running in to problems?

I know I know... it depends on many factors like the cd, x-over slope, adjacent channels, etc. I'm not seeing a problem running this way. Am I missing something here?

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