Hi,

Quick question. I'm installing one 12" woofer into my trunk running off a monoblock. Do I want a dual voice coil on that woofer and what if any are the positives and negatives to a dual voice coil over a single voice coil when used in a single sub setup?

Thanks!!

 

Hmm I am not sure if it really matters, It just give you more options...

 

the dual voice coils give the option of doubling the impedance or halving the impedance of a single coil, with the goal of maximizing the output of the system. The amps capabilities are key here, and the woofers impedance is also key.

 

Without knowing what "monoblock" amplifier its hard to say what coil config you should go with.

 

exactly.

what subwoofer/amp are you planning on running?

 

Sorry, haven't been around the last few days to reply.

This is the sub I'm running:

Polk Audio SR124-DVC (available in single voice coil)
12" Dual 4 ohm Signature Reference Series Subwoofer
Power Handling:
700 watts RMS
1400 watts Peak
Impedance: Dual 4 ohm
Dual 4 ohm voice coil
2.5" glass/epoxy voice coil former
Dual progressive roll spiders
ABS cone
Butyl rubber surround
Hex-key terminals
Frequency Response: 20 Hz - 200 Hz
Sensitivity: 89 dB

And the amp I'm running:

JL Audio XD600/1
XD Series Monoblock Class D Car Amplifier
RMS Power Rating (14.4V):
4 ohms: 400 watts x 1 chan.
2 ohms: 600 watts x 1 chan.
RMS Power Rating (12.5V):
4 ohms: 300 watts x 1 chan.
2 ohms: 500 watts x 1 chan.
Unregulated MOSFET switching type power supply
NexD Ultra-High Speed Class D topology
LED power (green) and protect (red/yellow) indicators
State-of-the-art microelectronic components
Mono channel operation
Advanced Thermal Rollback System completely eliminates annoying thermal shut-down events
Studio-grade signal processing with fully variable crossover filters
Extruded aluminum alloy system setting security cover
Total amplifier efficiencies exceeding 80%
Noise-killing, highly flexible differential-balanced inputs
Preamp RCA outputs to daisy chain multiple amps
Defeatable low-pass and infrasonic crossover filters
Dual speaker terminals simplify speaker installation
3-Way System Protection circuitry (thermal, overload, and speaker short protection)
Heavy duty compact unitary cast alloy heat sink for extreme heat dissipation
Silver-plated RCA level inputs
Silver-plated screw terminals
Input sensitivity:
Level: 100mV-4V
Variable low-pass filter (50-500 Hz, 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley)
Infrasonic Filter (30 Hz, 24dB/octave Butterworth)
Damping factor: >1,000 @ 4 ohms / 50Hz
Frequency response: 7-500 Hz
Dimensions: 8-1/2"L x 7-1/16"W x 2-1/16"H


Just a note: On the Polk Audio website a few customer reviews mention that the sub is over-rated a bit powerwise, hence the reason I picked the 600W monoblock. I don't want to overdrive and cook the sub.
By the rms ratings my guess would be get the dual voice coil so I can split the impedence down to 2 ohm to take advantage of higher output from the amp.

If this is correct my other question would be about the recommended voltages. I plan to buy a second battery for the trunk and I suppose I need a distribution block. Will this allow me to run the amps at 14.4V continuously?

This is all pretty new to me. Thanks for the help.