Help choose configuration with or without rear speakers?

Aspen235 · 03-13-2022, 03:39 PM

Hi all:

Should I run the factory rear speakers, help me decide.

SET Up
Factory HiFi
Focal ISC BMW components in front
Disconnected centre channel
Earthquake SWS 8Xi subs
Stock rear deck speakers

I just got a JL Audio XD600/6 amp. 6 channels at 75w

Option 1-No rears
Channel 1/2 for fronts with stock Focal crossover, high pass at 100hz
Channel 3/4 bridged at 150w to left sub, low pass at 100 hz with rear left input
Channel 5/6 bridged to right sub, low pass 100hz with right rear input
more sub power, no crappy rear speaker, control sub volume with fader

Or
Option 2 - yes rear deck speakers
CHANNEL 1/2 For fronts, high pass 100
Channel 3/4 for rears, high pass 120hz
Channels 5/6 to subs input rear lf right, low pass 100hz
Less sub power, but rear fill. Rears will likely blow up shortly then replace with Focal ISC 100.

Which would sound better?

Thanks for your input.

Phil @ Integral Audio · 03-13-2022, 04:46 PM

Rears are tricky.

If you're curious to dig into some of the technical reasons why, take a look at this short white paper Kevin put together and hopefully it helps a bit in your decision making process.

https://integralaudio.com/other_file...20Speakers.pdf

Aspen235 · 03-13-2022, 05:45 PM

Thanks Phil, I read that which got me thinking of option 1. The jl unit doesn't have time alignment so I guess option two may be hard to get right.

03-13-2022, 03:39 PM	#1
Aspen235 Second Lieutenant 59 Rep 205 Posts Drives: 2014 X3 35i, 2018 M240i 6mt Join Date: Feb 2016 Location: London, ON iTrader: (1)	Help choose configuration with or without rear speakers? Hi all: Should I run the factory rear speakers, help me decide. SET Up Factory HiFi Focal ISC BMW components in front Disconnected centre channel Earthquake SWS 8Xi subs Stock rear deck speakers I just got a JL Audio XD600/6 amp. 6 channels at 75w Option 1-No rears Channel 1/2 for fronts with stock Focal crossover, high pass at 100hz Channel 3/4 bridged at 150w to left sub, low pass at 100 hz with rear left input Channel 5/6 bridged to right sub, low pass 100hz with right rear input more sub power, no crappy rear speaker, control sub volume with fader Or Option 2 - yes rear deck speakers CHANNEL 1/2 For fronts, high pass 100 Channel 3/4 for rears, high pass 120hz Channels 5/6 to subs input rear lf right, low pass 100hz Less sub power, but rear fill. Rears will likely blow up shortly then replace with Focal ISC 100. Which would sound better? Thanks for your input.
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03-13-2022, 04:46 PM	#2
Phil @ Integral Audio New Member 7 Rep 20 Posts Drives: F30 328ix Join Date: Jan 2022 Location: Rhode Island iTrader: (0)	Rears are tricky. If you're curious to dig into some of the technical reasons why, take a look at this short white paper Kevin put together and hopefully it helps a bit in your decision making process. https://integralaudio.com/other_file...20Speakers.pdf __________________ Phil Integral Audio - We make the finest vehicle specific audio systems on the planet. www.integralaudio.com
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03-13-2022, 05:45 PM	#3
Aspen235 Second Lieutenant 59 Rep 205 Posts Drives: 2014 X3 35i, 2018 M240i 6mt Join Date: Feb 2016 Location: London, ON iTrader: (1)	Thanks Phil, I read that which got me thinking of option 1. The jl unit doesn't have time alignment so I guess option two may be hard to get right.
	Appreciate 0 Quote