In Reply to: Charge-coupled crossovers? posted by badman on April 26, 2011 at 15:31:03:
The JBL K3 circa 1993 was battery biased.Patents prior to 2000 were 17 years, plus, they never received a patent on the circuit either.
Results of Search in US Patent Collection db for:
AN/"harman international": 378 patents.
Hits 351 through 378 out of 378This would include Infinity in there too, as I believe they had a battery biased speaker in production before JBL did.
Edits: 04/27/11
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Follow Ups
- JBL K2 - djk 02:04:49 04/27/11 (10)
- Aha! - badman 11:07:37 04/27/11 (9)
- Hmm...so THAT's why there are so many caps in series/parallel! - jeffreybehr 14:29:14 04/27/11 (8)
- The basic idea - badman 14:54:39 04/27/11 (7)
- crossover capacitors. DC bias - Lew 08:42:50 07/05/11 (0)
- First, it's 'biasing', not 'bias-ing', just as it's talking and not talk-ing. Next, the capacitance... - jeffreybehr 15:05:08 07/06/11 (0)
- Can you draw this? - Lew 11:27:25 05/02/11 (1)
- Here 'tis. - jeffreybehr 15:33:46 05/03/11 (0)
- RE: Here 'tis. - Æ 16:19:27 07/06/11 (0)
- Did you read the 'DO NOT 'believe' the nature of the lettered devices other than...' - jeffreybehr 15:58:29 07/07/11 (0)
- TYVM. I certainly believe that Audioquest's Dielectric-Bias System... - jeffreybehr 22:10:12 04/27/11 (4)
- RE: TYVM. I certainly believe that Audioquest's Dielectric-Bias System... - unclestu 12:30:01 05/02/11 (1)
- RE: The idea was to raise the signal current above the zero point so that it never crossed zero. - badman 13:20:35 05/02/11 (0)
- The problem with cable - badman 09:25:28 04/28/11 (1)
- Well...the music conductors aren't used in the DBS system. - jeffreybehr 15:04:07 04/28/11 (0)