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<blockquote data-quote="audioholic" data-source="post: 7525977" data-attributes="member: 549629">Ive forgotten now what your sub setup is, multiple subs or just one. The easiest way to remember voice coil wiring is just to realize that when you parallel or series coils together, they either halve their impedance, or double it. Two 4ohm coils wired together will either be 2ohms mono, or 8ohms mono. So two dvc 4ohm subs could have the coils of each sub wired together to make 2ohms mono, then wire each sub together to either 1ohm or 4ohm mono.Yes, the excess resistance is probably in your wiring. Do the big 3, and make sure your power/ground wires to the amplifier are of sufficient size.Your installer is incorrect. Its true that any component added *might* have a grounding noise issue that could introduce &#039;alternator whine&#039; into the stereo, but there is no reason to assume an EQ specifically would do this. Especially if your installer is competent enough to avoid a ground loop problem. Your installer sounds a little inexperienced to me.External EQ&#039;s tend to have more capabilities than a built-in EQ in a deck, and are usually superior them.</blockquote>

[QUOTE="audioholic, post: 7525977, member: 549629"] Ive forgotten now what your sub setup is, multiple subs or just one. The easiest way to remember voice coil wiring is just to realize that when you parallel or series coils together, they either halve their impedance, or double it. Two 4ohm coils wired together will either be 2ohms mono, or 8ohms mono. So two dvc 4ohm subs could have the coils of each sub wired together to make 2ohms mono, then wire each sub together to either 1ohm or 4ohm mono. Yes, the excess resistance is probably in your wiring. Do the big 3, and make sure your power/ground wires to the amplifier are of sufficient size. Your installer is incorrect. Its true that any component added *might* have a grounding noise issue that could introduce 'alternator whine' into the stereo, but there is no reason to assume an EQ specifically would do this. Especially if your installer is competent enough to avoid a ground loop problem. Your installer sounds a little inexperienced to me. External EQ's tend to have more capabilities than a built-in EQ in a deck, and are usually superior them. [/QUOTE]

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