Showing posts with label coil. Show all posts
Showing posts with label coil. Show all posts
Sunday, October 5, 2014
schematic diagram of Buick Allure Ignition Coil Wire Set and Parts
Here is a typical schematic diagram of the 2008 Buick Allure Ignition System Parts and Components Assembly.
1. PCM
2. Camshaft sensor
3. Crankshaft sensor
4. Crankshaft sensor Shield
5. Knock sensor
6. Ignition module
7. Ignition module Bracket
8. Ignition coil
9. Ignition coil Seal
10. Plug wire set
11. Spark plug
Tuesday, September 2, 2014
Dual Voice Coil Subwoofers
Dual voice coil subwoofers are becoming a popular choice among car audio enthusiasts who want more flexibility in
Parallel:A dual 4-ohm voice coil subwoofer with its coils wired in parallel presents a 2-ohm load to your amplifier. Since an amplifier produces more wattage at a lower impedance, the parallel connection ensures youll get the most output from your amp. In the same fashion, if you have a stereo amplifier and two DVC subs, wire both subs for 2-ohm impedance (one per channel) for maximum output.The key difference between single and dual voice coil subwoofers is the multiple wiring options DVC subs offer:
- Series: Series wiring lets you configure multiple woofers to one amplifier at an acceptable impedance. Wire both coils in series for an 8-ohm impedance, and then wire two 8-ohm subs together in parallel for 4-ohm total impedance (perfect for most 2-channel amps bridged to mono operation). Another example: if you have a high-powered 2-channel amplifier, wire four 8-ohm subs per channel (each channel sees a 2-ohm load).
- Independent: You can wire each voice coil to a separate channel of your amplifier, if you prefer not to bridge your amp. Independent wiring is a nice option if youre wiring two DVC subs to a 4-channel amplifier — one voice coil per channel. Just make sure the signal going to each coil is exactly the same, or the differences will cause distortion.
DVCs and high-performance amplifiers
Also, if you choose to add an unregulated amp as a power upgrade to your existing DVC subwoofer system, you can simply rewire your subs for optimum impedance. Remember that most car amps are stable down to 2 ohms in normal operation, and to 4 ohms in bridged mode. Its important to check your amps manual for its operating parameters before hooking up a DVC sub thats wired for low impedance.Some amplifiers are designed with an unregulated power supply — these amps are favored by mobile audio competitors for their superior performance. An unregulated amps power increases dramatically when it sees a lower impedance load. For example, an amplifier that produces 75 watts RMS x 2 channels at 4 ohms would double its power to 150 watts x 2 with a 2-ohm load. DVC subwoofers (particularly the dual 2-ohm models) give you the flexibility to wring every bit of power out of this type of amplifier.
A DVC sub offers the same performance whether its wired in series or parallel. Its power handling levels, frequency response, and other specifications do not change — the only difference is the impedance presented to the amplifier. As a result, youll need to use the enclosure thats recommended for your sub, no matter how its wired.
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