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BMW 3-Series (E90 E92) Forum
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Want a nice sounding system for my 328....
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04-06-2009, 05:25 PM | #23 | |
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This conversion cable can help you out (3 of them and you will be set): http://www.shopatron.com/product/par...r=91803/1451.0 |
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04-06-2009, 05:53 PM | #24 | |
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04-09-2009, 05:04 PM | #25 |
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Technic, sorry to bother you again, but the OEM speakers crossovers are in the OEM amp? Is that correct? If you drop in the PDX-5 with either stock speakers or the BSV drop in set, how are crossovers handled?
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04-09-2009, 05:17 PM | #26 | |
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So, if you replace the OEM amp with the PDX-5 you will have to more or less replicate what the OEM amp active crossovers are doing using the PDX-5 active crossovers: set the front/rear channels output for a high pass at around 150Hz-200Hz (or just to taste above 100Hz) and the sub channel to low pass at 150Hz. The BSW speaker kit comes with inline caps as well so the PDX-5 output setup would be the same as above. |
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04-12-2009, 12:46 PM | #28 |
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Okay, one more trip to the well:
I replaced my HU with an Alpine CDA 9886, which I think puts out 50 wpc. It has a separate subwoofer channel, but the installer said he can't hook that up with the stock system because all of the crossovers are in the stock amp. If I replace my stock speakers with Focals, which have their own crossovers, is there some way to drive the Focals directly from the HU, and use the stock amp to drive the subwoofers? And, if so, is there some way to make the stock amp drive the subwoofers stronger than it does now? (Maybe by using the sub channel from the HU.) Without the expense of a new amp? This occurred to me because if I turn up the volume on the HU, it's pretty darn loud at relatively low settings. That makes me think it's a strong signal from the HU, then amplifed by the stock amp. |
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04-13-2009, 12:30 AM | #29 | |
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Thanks for the post. I was wondering how to hide the pdx-5.
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04-13-2009, 01:02 AM | #30 | |
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The Focal xovers and the Alpine HU deck power may not play nice, and are a generally bad idea. Your idea about why the system is loud is not really too correct. The signal is fairly low-level. The amp, well, amplifies. No reason to buy Focals and wimp on the amp. Better to use OEM speaks as Technic is for now, I think. |
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04-13-2009, 10:16 AM | #31 |
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Yeah, if I had to start over, I would have started by replacing just the amp, then the speakers, then the HU. Why won't the HU drive the speakers directly? Seriously, right now if the volume is turned up less than a 1/4 of the way, it's really loud.
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04-13-2009, 10:49 AM | #32 | |
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The issue here is that you replaced the OEM HU with aftermarket... now you have to go as well with an aftermarket amp. You could try to use the low level outputs of that Alpine HU as inputs to the OEM amp and see what happens/if the signal level matches; it could work, as differential inputs amps can accept non-differential signals. But then again the whole idea of going aftermarket HU is to not be doing any experimentation, IMO. |
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05-30-2009, 02:48 PM | #33 | |
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Excellent recommedation... I have a question. Since on most competition SQ systems have only a front stage, stock or non-existant rear fill run off of a HU or low power amp, and subs, would it be better to down size the amp to a 4 channel? This way you could save a hundred dollars by getting a PDX 4.100 and keep the stock amp running the stock rears. Is it possible to have the stock amp only run the rear set of speakers? Maybe with the $100 savings one could buy a better front stage??? What do you think??? |
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05-31-2009, 10:38 AM | #34 | |
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05-31-2009, 10:45 AM | #35 |
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Most of the systems I've done in E90s have been aftermarket 4-channel running new F door speaks and a trunk sub, and leaving OEM amp in place on R door speaks and underseat woofers for midbass.
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