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4th June 2010, 12:30 PM
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#1 |
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diyAudio Member
Join Date: Aug 2008
Location: Roswell GA
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Bi-amping question
If I wish to experiment with bi-amping in order to split the preamp singnal to two signals do I just simply add a parallel L&R output from the preamp?
Preamp is a JFETBOZ. My desire is to use one amp to drive the tweeters and another to drive the woofers. As of this point my experiments will include: JFETBOZ Aleph Mini-A F5 Zaph Audio SR71 bookshelf speakers Thanks in advance |
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4th June 2010, 01:01 PM
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#2 |
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diyAudio Member
Join Date: Jun 2001
Location: Calgary
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You should use an active crossover. Better read this:
BiAmp (Bi-Amplification - Not Quite Magic, But Close) - Part 1 |
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4th June 2010, 01:51 PM
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#3 |
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diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
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Hi,
stop. There may be confusion here. In the UK, bi-amping means using two amplifiers to drive the passive crossover in the two way speaker. In the US, bi-amping seems to be used to mean creating an active speaker, using a line level crossover feeding 2amplifers, each amplifier directly connected to a driver with no passive crossover. Which are you referring to?
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regards Andrew T. |
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4th June 2010, 02:27 PM
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#5 |
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diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
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Hi,
has boz used an output resistor to help stabilse the pre-amp when capacitive cables are used as interconnects? If yes, then simply add a second resistor of the same value. Take one feed from each resistor to the power amps. If there are no resistors required at the pre-amp output then I suggest you add a pair of 51r. Again taking one feed from each 51r to the power amps.
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regards Andrew T. |
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4th June 2010, 04:08 PM
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#6 |
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Lightning In A Bottle
diyAudio Member
Join Date: Sep 2003
Location: Bremerton, WA
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I think it'll sound more balanced with the mini-A (higher gain) driving the woofer (lower sensitivity) and the F5 (lower gain) on the tweeter (higher sensitivity)...well just for kicks try it both ways to find out.
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Quad Matched Toshiba 2SK1530/2SJ201 MOSFETs  http://www.diyaudio.com/forums/swap-...ml#post2086375
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4th June 2010, 11:11 PM
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#8 |
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diyAudio Member
Join Date: Aug 2008
Location: Roswell GA
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Yes, as far as which amp to drive what once I have the preamp sorted out it will be easy to experiment.
The biggest worry I think would be needing a pot on the mini-A due to the higher gain. Not a big deal though... |
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4th June 2010, 11:12 PM
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#9 |
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The one and only
Join Date: Mar 2001
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Better to use B1 buffers with separate gain controls for hi/low
(which makes it a B2) 
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