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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Hi,I'm trying to figure out if I can incorporate a new component into my (planned) system. This component is a passive transformer-based attenuator. Right now, it's driving just my ASL Waves (100K input impedance) and it seems to be doing just fine. I want to add a subwoofer to this system, using an active line-level XO (opamp based, being built from a kit). Here's where things get confusing, and I would appreciate some help in figuring this out.
* One obvious option is to send the passive preamp's output to an opamp buffer, and then use that to drive my Waves (full-range), and more opamps that make up the low-pass XO. This would probably be the easiest solution from an impedance point of view. However, this puts that opamp in the signal path to my mains, and I'm trying to see if I can avoid that.
* Assuming the passive pre can drive the parallelled impedance of the Waves and my XO, what's the best way to get two outputs from it? Wire up a second set of RCA's in parallel? Use an external Y-connector? Does it make a difference? I would guess that soldered connections are preferable to a Y-connector, but I'm not sure.
* What else do I need to worry about, since this is a transformer-based preamp? I know I need to read up on how impedances work, all I figured out last night was that the input impedance of the downstream device affects the input impedance of the preamp, based on the turns ratio selected. If someone could explain this more clearly, that would be a big help too.
Thanks,
Saurav
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Topic - Transformer-based passive pre, biamp with active XO, need impedance help please - Saurav 09:08:35 04/01/02 (33)
- Re: Transformer-based passive pre, biamp with active XO, need impedance help please - the_neighbor 13:42:11 04/11/02 (0)
- Re: Transformer-based passive pre, biamp with active XO, need impedance help please - Joseph Lau 02:08:22 04/02/02 (3)
- Have you tried the low-resistance attenuator? - KCHANG 07:36:17 04/02/02 (2)
- Silver Rock transformer att. vs. 1 k resistor shunt attenuator - Arbelos 14:51:36 04/06/02 (1)
- Re: Silver Rock transformer att. vs. 1 k resistor shunt attenuator - the_neighbor 13:33:08 04/11/02 (0)
- Transformer-based volume control v. low-resistence attenuator? - KCHANG 14:33:10 04/01/02 (23)
- Re: Transformer-based volume control v. low-resistence attenuator? - dave slagle 20:34:34 04/01/02 (20)
- But how about wire-wound resistors? How does your argument apply to that case?(NT) - KCHANG 08:56:43 04/02/02 (17)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 10:01:22 04/02/02 (16)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 13:28:12 04/02/02 (15)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 15:12:06 04/02/02 (14)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 19:19:50 04/02/02 (13)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 20:19:40 04/02/02 (12)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 21:47:58 04/02/02 (11)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 08:03:41 04/03/02 (10)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 11:11:55 04/03/02 (9)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Jon Risch 17:43:22 04/04/02 (5)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 19:19:15 04/04/02 (4)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 15:00:46 04/05/02 (3)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 09:56:32 04/06/02 (2)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 20:14:47 04/06/02 (1)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 22:51:41 04/06/02 (0)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 13:15:17 04/03/02 (2)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - Steve Eddy 19:29:23 04/03/02 (1)
- Re: But how about wire-wound resistors? How does your argument apply to that case?(NT) - dave slagle 07:22:54 04/04/02 (0)
- That's a real good and interesting point. - Kurt Strain 08:10:03 04/02/02 (1)
- Re: That's a real good and interesting point. - dave slagle 08:18:54 04/02/02 (0)
- Re: Transformer-based volume control v. low-resistence attenuator? - Kurt Strain 15:03:50 04/01/02 (0)
- Re: Transformer-based volume control v. low-resistence attenuator? - Saurav 14:44:24 04/01/02 (0)
- Re: Transformer-based passive pre, biamp with active XO, need impedance help please - Steve Eddy 12:20:02 04/01/02 (3)
- Re: Transformer-based passive pre, biamp with active XO, need impedance help please - Saurav 13:05:52 04/01/02 (2)
- Re: Transformer-based passive pre, biamp with active XO, need impedance help please - Steve Eddy 13:43:55 04/01/02 (1)
- Re: Transformer-based passive pre, biamp with active XO, need impedance help please - Saurav 13:53:52 04/01/02 (0)
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