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#1
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sound system upgrade - 2006 X3 non-DSP
Some pics are here: http://kward1.homestead.com/2006BMWx3.html You can see how the door speakers play like 150 and up, and the tweeter plays like 10k and up, and the underseat woofers play like 300 and down - all with dramatic EQ curves. The OP of the HU, however, is flat as a pancake and goes to 6.8v p-t-p without clipping. (3.4 usable with balanced-compatible amps). The HU is not as clean as other BMW HUs I've worked with - the last 6-7 clicks on the volume knob are clipping like mad. Keep below that and you're OK.
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musicar northwest, portland oregon musicarnw.com The West Coast BMW audio experts Last edited by el_duderino; 03-10-2006 at 08:14 PM. |
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#2
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Looks nice, Ken.
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#3
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Thanks. Seem to not have any 4" mid pics... grr.
There might be an issue with the jumper config on the Zapco BTL unit. On many BMW's in the past, installers have run the OEM balanced preout signals straight into the amp without using a BTL. The BTL is a bare-wire-to-Symbilink-balanced adapter, and we used it in this car rather than chop a Symbilink cable in half. The BTL jumper configuration we settled on was electrically the same thing, though - bypassing the caps and resistors on the board and making it a straight line pass-through. With caps in and no resistors the highs sounded glare-y and harsh. We did not hear a difference between no caps and no caps-or-resistors. But... we have an intermittent problem with the HU going silent after a key cycle and not sending audio out either the F (going to the Zapco) or the rear (still going to the OEM amp!) until after the Zapco is disconnected. The moment the Zapco is disconnected the audio comes back out of the HU! So I'm thinking that we needed to leave at least the resistor portion in there. We are going to test my theory this morning. More updates as they appear on this and other stations.
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musicar northwest, portland oregon musicarnw.com The West Coast BMW audio experts |
#4
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OK, fix seems to be setting the jumpers on the Zapco BTL to "C".
However, fun fact - we only could create the problem with the Icelink connected. Disconnected, it worked fine. I can only conjecture that the current draw of the Icelink and the current draw internal to the current module of the preamp chip seeing the Zapco Symbilink front end combined to freak out some current-limiting feature of the preamp output IC.
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musicar northwest, portland oregon musicarnw.com The West Coast BMW audio experts |
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#6
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It's 2". If you have to use it put a tweeter there. Or don't use rears.
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musicar northwest, portland oregon musicarnw.com The West Coast BMW audio experts |
#7
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Why dont ya make a mold and sell them!!
Id buy one. I just called and talked to Justin about it! |
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