In Reply to: RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY posted by josh358 on June 23, 2011 at 09:25:44:
Should not be a problem as the resonance is not problematic. It does not have the same kind of nasty outcome as it does for cones - I ran the Neo8 full range including its main resonance at 300 hz. It is a small peak, and definitely sounds better at those frequencies than does the Tympani bass panel.
The original Tympani crossover rolls off the midrange well above the main resonance peak, and I douubt there is that much of a problem with the secondary resonances from the width dimension or the cavity resonance, as the original crossover puts the cavity res away from the bandpass.
The voice coil is etched on the Neo8, but I don't really hear a metalized poly sound. But then I don't really get that from the Sonicaps Gen I or Gen II either. The problem with the metalized film is oxygen leakage into the chamber, pin holes and the metal layer being made of small crystals. It is possible to obtain a more uniform metal layer with a few techniques and careful attention to sealing the deposition chamber. All of these add to the cost. So you can make a good sounding metal film layer.
I am thinking that the other issue is that there is no capacitive coupling through the membrane but accross the air between the traces.
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Follow Ups
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - Satie 06/23/1120:59:47 06/23/11 (25)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - josh358 08:09:21 06/24/11 (24)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - JLindborg 00:41:06 06/25/11 (23)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - josh358 06:53:41 06/25/11 (7)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - JLindborg 11:21:23 06/25/11 (6)
- Belay that, I was wrong! - josh358 09:19:21 06/26/11 (4)
- RE: Belay that, I was wrong! - JBen 10:39:46 06/26/11 (3)
- RE: Belay that, I was wrong! - josh358 11:53:32 06/26/11 (2)
- Possible impedance sweep alternative - JBen 13:44:16 06/26/11 (1)
- RE: Possible impedance sweep alternative - josh358 16:58:19 06/26/11 (0)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - josh358 13:42:58 06/25/11 (0)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - tom_gootee 01:36:01 06/25/11 (13)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - josh358 07:03:04 06/25/11 (0)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - JLindborg 02:01:52 06/25/11 (11)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - tom_gootee 02:23:45 06/25/11 (10)
- "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - andyr 05:09:51 06/25/11 (9)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - tom_gootee 14:31:29 06/26/11 (8)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - josh358 09:22:29 06/27/11 (5)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - tom_gootee 18:42:42 06/30/11 (4)
- Wendell's answer - josh358 11:28:06 07/3/11 (0)
- RE: Wendell's answer - JBen 23:22:13 07/11/11 (0)
- RE: Wendell's answer - josh358 12:17:29 07/12/11 (0)
- RE: Wendell's answer - JBen 12:51:52 07/12/11 (0)
- RE: Wendell's answer - josh358 06:27:23 07/21/11 (0)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - josh358 09:49:12 07/1/11 (2)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - tom_gootee 13:51:32 07/2/11 (1)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - josh358 06:52:04 07/3/11 (0)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - IEaudiodude 15:06:38 06/26/11 (1)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - tom_gootee 19:28:41 06/26/11 (0)
- RE: here is a Wendell Diller follow-up on hot-rodding Ferdinand Posche's "VW", REALLY - berni 01:28:28 06/25/11 (0)