RE: fool's bi-amp ?

Posted by Presto (A) on February 27, 2012 at 16:10:17

In Reply to: RE: fool's bi-amp ? posted by b.l.zeebub on February 25, 2012 at 04:44:57:

I am well aware of the benefits of active crossovers (and typically use them exclusively). But this is not a "from scratch" DIY effort. This is an existing passive design with a specific sound, and specific voicing. Even the impedance related 'errors' are part of the final voice of the speaker. Since the final sound is not really 'erroneous', then these errors are actually part of the equation.

Let's say you have 4th order LR (electric) passive crossovers. You replace them with 4th order active. Guess what, the sonics just changed because the impedance of each driver in the passive network was not perfectly flat, which interacted with the crossover impedance, resulting in a very specific transfer function. So when people speak of "fools biamping", one could argue just as fast that an arbitrary acoustic response from an 'active replacement' is also foolish, if the intent was to preserve the original sonics of the speaker in question.

You can get the added benefits of active, but the "changeout" is far far more complex than saying "Okay - replace LR2 passive with LR2 active, there, I fixed it."

If I could offer a customer identical acoustic response with a given crossover, I would consider calling the effort a "passive to active conversion". But if the sonics change, it's really a new speaker at that point and not an improved version of the original.

Building from scratch is a whole other kettle of fish.

Cheers,
Presto

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Follow Ups Full Thread

Topic - JBL Monitor Amp help - paul 4430 11:39:11 02/20/12 (32)

Own these too.... - 2chJunkie 06:34:57 02/23/12 (13)

RE: Own these too.... - paul 4430 08:19:35 02/25/12 (3)

VRDs are some of the best... - 2chJunkie 13:26:13 02/25/12 (2)

RE: VRDs are some of the best... - paul 4430 09:24:31 02/27/12 (1)

RE: VRDs are some of the best... - 2chJunkie 10:44:43 02/27/12 (0)

RE: Own these too.... - b.l.zeebub 15:00:56 02/23/12 (8)

Yeah Ive heard this before... - 2chJunkie 15:26:15 02/23/12 (7)

RE: Yeah Ive heard this before... - b.l.zeebub 04:53:51 02/25/12 (6)

RE: Yeah Ive heard this before... - 2chJunkie 10:16:08 02/25/12 (5)

RE: Yeah Ive heard this before... - b.l.zeebub 12:48:30 02/25/12 (4)

sounds like an AMAZING deal - 2chJunkie 08:27:08 02/26/12 (3)

RE: sounds like an AMAZING deal - b.l.zeebub 11:44:51 02/26/12 (2)

RE: sounds like an AMAZING deal - 2chJunkie 13:50:18 02/26/12 (1)

RE: sounds like an AMAZING deal - b.l.zeebub 02:56:11 02/27/12 (0)

RE: JBL Monitor Amp help - paul 4430 08:39:58 02/21/12 (4)

RE: JBL Monitor Amp help - b.l.zeebub 11:23:51 02/21/12 (3)

RE: JBL Monitor Amp help - paul 4430 11:38:41 02/21/12 (2)

RE: JBL Monitor Amp help - b.l.zeebub 13:22:50 02/21/12 (1)

RE: JBL Monitor Amp help - paul 4430 13:37:26 02/21/12 (0)

fool's bi-amp ? - djk 00:08:01 02/21/12 (12)

RE: fool's bi-amp ? - Presto 14:37:17 02/21/12 (11)

RE: fool's bi-amp ? - b.l.zeebub 12:14:28 02/23/12 (5)

RE: fool's bi-amp ? - Presto 15:28:41 02/23/12 (4)

RE: fool's bi-amp ? - b.l.zeebub 04:44:57 02/25/12 (3)

RE: fool's bi-amp ? - Presto 16:10:17 02/27/12 (2)

RE: fool's bi-amp ? - b.l.zeebub 02:26:12 02/28/12 (1)

RE: fool's bi-amp ? - Presto 17:08:42 02/29/12 (0)

RE: fool's bi-amp ? - paul 4430 14:47:21 02/22/12 (4)

RE: fool's bi-amp ? - Presto 17:20:39 02/22/12 (3)

RE: fool's bi-amp ? - paul 4430 19:24:05 02/22/12 (2)

Tri-Amping 4430s with Subwoofer - g1inskyms 20:14:29 08/02/14 (0)

No trouble, my pleasure! -t - Presto 15:29:14 02/23/12 (0)

Follow Ups

RE: fool's bi-amp ? - Presto 16:10:17 02/27/12 (2)

RE: fool's bi-amp ? - b.l.zeebub 02:26:12 02/28/12 (1)

RE: fool's bi-amp ? - Presto 17:08:42 02/29/12 (0)

RE: fool's bi-amp ?

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