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In the Forum: Horn-Loaded Speakers
In the Thread: Living Voice Loudspeaker
Post Subject: Just pure guessing….Posted by Romy the Cat on: 9/17/2009
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 jessie.dazzle wrote: |
| I might be totally wrong, but I just assumed that Vitavox's decision to specify a lower impedence voice coil for horn-loaded applications was related the additional load placed on the driver once mated to a horn, resulting in an increase in impedence as seen by the amplifier (???). |
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It is hard to judge. To know it we need to know what the throat reactance was in the original Vitavox horns. I do not have even knowledge what was the throat size in Vitavox horns bass horns. When I had access to the System 191 I did not care about it but now I have no accessable System 191 to check it out and to measure the performance of bass driver in it. I never heard or seen the Vitavox bass bins.
Again, I do not particularly care how and why Vitavox did what they did. To me they are not a reference implementation but rather just an implementation. It is nice to see and to hear what they did – it is always very educational but I doubt that it will be relevant to what I do in my specific situation. The case to point – the S2 with originals suspension in System 191 sound VERY different then what it does in Macondo. I am sure that what I put the AK151 and K15/40 in my midbass horn I will have most likely very different result then what Vitavox was able to get (and looking what they did I do not think that they were too advanced). The minor problem that I have is that I do like how the AK151 and K15/40 sound in the Klipsh-like corner-horn. From what I know about the horn I feel that ½ size of a proper front loaded horn shall be more interesting. How my front lording will affects the Vitavox’s bass driver I do not know at this point.As I said, I invest very littlie into the facts that Vitavox specified a lower impedance voice coil for horn-loaded applications. It is very highly possible that this fact has absolutely nothing to do with sound but was made purely by technological reasons. Let say that the vendors that winded the coils for Vitavox at that time charged 1.13 cents less for 8R coils then for 16R coils. Or they had the overstock of the 8R coils that left from another supplier and then gave to Vitavox a special accommodation for the stock of 8R coils. It might be zillion reasons. Not the last reason is the one that 8R coil would make the power amp that drive it more powerful. If you use horns in pro world then they are larger and you will use less of them. Consequentially you might want to drive each driver with more power – the lower impedance would help in this direction…
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