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In Reply to: RE: Who has experience with the C34 back loaded horn? I am considering building a pair. posted by pete1729 on September 15, 2020 at 04:43:39
Back loaded horns have a major inherent flaw, a response dip where the front and rear waves meet 180 degrees apart. It's the major reason why they disappeared from the marketplace long ago,even in pro-sound applications. The C34 doesn't go all that low either, a reflex box will beat it.
The Danley Tapped Horn is a variation of the back loaded horn, and they suffer from that dip, but since they're used as subwoofers they're low passed below the dip frequency, which typically occurs between 150-250Hz.
Follow Ups:
Yes, Bill, and the fact that the suitable drivers for those Tapped Horns have lots of inductance, the mechanical low pass in concert with said inductance makes them unsuitable above about 40-70 Hz. unlike your Tuba HT's which can go at least an octave higher with greater sensitivity!
It's ALL a compromise!
You don't have to use that type of driver in a tapped horn. Danley does to make them as bulletproof as possible. One of the trade offs for the relatively small size of the tapped horn is higher excursion, so Danley has to account for that. With the prices he gets for them he can afford to use $500 drivers.
Agreed, having owned 3 of his tapped horn designs and settling on the venerable TH-50 as the best overall for my current living room, and having designed/built a few of my own. I agree with you comment 100%.
Thank you. I have read about that problem. I kind of know your name, if I remember correctly you're an authority on this subject. Just reading your comment has given me some clarity. Now that I'm looking from this perspective I'm realizing that even a high dollar take on this approach, the Living Voice 'Air Scout', has an accessory subwoofer.
A bass reflex box it is. I'd like to try to build some flexibility into it so that it might accommodate more than one driver; not more than one at a time, but rather one to start and a different one later. Is there a practical way to do this?
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