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In the Forum: Horn-Loaded Speakers
In the Thread: German Odeon horns.
Post Subject: Odeon weren't really serious about what they do.Posted by Romy the Cat on: 4/2/2007
Adrian,
You pretty much said it but do not think that what you said it minor – it is in fact huge, with exception of some rough lathe-work: it is not exactly true but if it was true then it would be irrelevant to Sound.
I really do not know what was in the head of the Odeon guys when they did what they did.
1) Vertical positioning: it is absolutely strange. A conventional height of listener ears is 40”-44” It is the height of Odeon upperbass axis. Why they did it I have no idea. The Odeon upperbass looks like 150Hz and the next channel looks like 350Hz. It means that the upperbass works most likely from150Hz to 800Hz. Why they need to shot this region from the level of the listener ears? Only God knows. They have an empirical center of the MF channels at 6 feet!!! Are they crazy or they are planning to listen the thing from no closer then 20 feet?
2) Very strange bugle at the bottom - juts waste of wood and valuable space. I have a design where I was trying to inject under a mouth of upperbass horn a LF woofer. It was a special type of LF channel that used a special driver, an ultra small enclosure and eated a lot of power (similar to Sunfire True Subwoofer). It does not look that Odeon used the bulge for anything LF-useful. (look #4 for more)
3) Absolutely stupid stand with spikes and so in. It is very much unnecessary and juts waste the coupling of the upperbass horns with Flore – it is where they loose ~10Hz
4) I might presume that Odeon peoples were trying stick into the pyramid of their speaker one more channel – midbass horn that has a driver between MF and upperbass and fires down. The idea never was good as to implement it they need to sacrifice everything – it is what they did bit in retie to get still very compromised midbass
5) The Angled axis – the big red flag - instantaneously
6) Very stupid front mouth termination.
7) Ported bass- it is with dedicated sections of looks like 30-40 cub feet!!!
8) It looks like too shallow upperbass
9) Absolutely barbaric time-alignment. In the horn world this arrangement will sound like absolute crap. Interesting that they with their shallow upperbass do have space to align the MF channels but they intentionally have chosen do not do it.
I can go on and on but it does not look that the Odeon were really serious about what they do. The Odeon are very far from the ideas of Cessaro Gamma and the ideas of Macondo…
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