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· Registered
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Discussion Starter · #1 ·
New to the forum, and copied some of this information from another member (DanMc85) since my setup is pretty similar. I'm looking for some help to properly setup my JBL MS-8 for integration into my 2014 Ford Fusion Titanium. I’ve thus far ran all new wiring, installed a new center speaker in the front dash (powered by the the MS-8’s internal amplifier), and am in the process of installing four new component door speakers and a 10” fully sealed subwoofer powered by and 5-channel amplifier which receives low level inputs via RCA cables from the MS-8. In total I will have a 5.1 setup.

Sorry for the long post but didn't want to leave out any details. Hoping to get some good recommendations for some initial settings for both MS-8 setup and amplifier setup.

I will first need to configure the crossover settings on my JBL MS-8 before doing the timing and delays using the MS-8’s included headset microphone for calibration. I was wondering, using the data about my setup (see above and below), what would you audio pros recommend I set the crossover frequencies and slopes to during the initial MS-8 setup process?

Here is the info I am in need of:
Recommendation to set the MS-8 crossover network settings for the front and rear (sides) speakers as the speakers are connected to their own crossovers, so to me it is a double crossover. Just don't want to cut off too much of the signal or mess up the phase using the wrong slopes.

Also when tuning the amp gains, should I just set the input voltage range to low (200mV-2V) and crank the sensitivity all the way up to 2V? Or should I set them with a multimeter to get best output or do I have to under compensate for the center channel not being amped by the main amplifier? Just don't want the center to sound washed out.

Any recommendations / suggestions anyone can provide are welcomed.

Sound Source:
2014 Ford Fusion Titanium 2.0L
Microsoft Sync System w/ Sony DSP (Deactivated)
Note: Sony DSP Disabled/Unplugged, Ford sound processing bypassed
Audio Control Module - Reprogrammed using Ford IDS As-Built Data so vehicle doesn't rely on factory amp and no longer outputs high level audio. Now outputs clean low level output instead of processed audio to reprocess again by MS-8.

25 - 1.79 Volts
26 - 2.07 Volts
27 - 2.39 Volts
28 - 2.68 Volts (perfect for JBL MS-8 which is based on 2.8 Volts)
29 - 3.12 Volts
30 (Max Volume) - 3.49 Volts

Wiring of Four Door Component Speaker Setup:
Low Level Speaker Out -->MS-8 --> JL Audio XD1000/5v2 --> JL Audio Crossover --> JL Audio ZR650-CSi components with Woofer/Tweeter (Separate Outputs)

Front and Rear (In Front and Rear Doors - Two Sets):
JL Audio ZR650-CSi (2-Way) - 6.5" - Connected to JL Audio XD1000/5v2 (Channels 1-4 = One channel per door) in which the amp is wired from the low level RCA outputs of the MS-8
Using JL Audio Crossovers - Connected to XD1000/5v2 amplifier in 1-way setup making use of the component Crossovers.
Continuous Power Handling (RMS): 85 W
Peak Power Handling: 225 W
Frequency Response (± 3 dB): 48 Hz - 25 KHz (25000 Hz)
Sensitivity: 89.5 dB
Nominal Impedance: 4 Ω

Wiring of Front Center Channel Speaker Setup:
Low Level Speaker Out -->MS-8 --> JL Audio C2-350x

Front Center Speaker:
JL Audio C2-350x (2-way) - 3.5” Coaxial - Connected directly to MS-8 Output (Internal Amp)
Continuous Power Handling (RMS): 25 W
Peak Power Handling: 75 W
Sensitivity: 83 dB
Frequency Response: 130 Hz - 22 KHz ± 3 dB
Nominal Impedance: 4 Ω

Wiring of Subwoofer in Trunk :
Low Level Speaker Out --> MS-8 --> JL Audio XD1000/5v2 --> JL Audio CS110G-W6v3

Trunk Subwoofer:
JL Audio 10” CS110G-W6v3: Single 10W6v3 ProWedge
Connected to JL Audio XD1000/5v2 (Channel 5) from MS-8 low level RCA
Continuous Power Handling (RMS): 600 W
Peak Power Handling: 1200 W
Sensitivity: 82.7 dB
Frequency Response: 22 - 200 Hz
Nominal Impedance: 2 Ω
Enclosure Type: Sealed

Digital Amplifier (Built-in DSP/Crossovers currently disabled):
XD1000/5v2: 5 Ch. Class D System Amplifier, 1000 W
RMS @ 14.4V (Input Power):
Main Channels @ 4 Ω: 75 W RMS x 4
Main Channels @ 2 Ω : 100 W RMS x 4
Main Channels - Bridged @ 4Ω: 200 W RMS x 2
Subwoofer Channel @ 4 Ω: 400 W RMS x 1
Subwoofer Channel @ 3 Ω: 500 W RMS x 1
Subwoofer Channel @ 2 Ω: 600 W RMS x 1
Frequency Response (Main Channels): 12 Hz - 22 kHz (+0, -1dB)
Frequency Response (Subwoofer Channel): 10 Hz - 1 kHz (+0, -1dB)
SNR (Main Channels): >104 dB
SNR (Subwoofer Channel): >84 dB
Input Voltage Range @ RCA Inputs: Switchable from 200mV-2V RMS
(Low) to 800 mV - 8 V RMS (High)

· Registered
234 Posts
If you haven't already, take some time to read the MS-8 FAQ thread. Its basically the highlights from the larger MS-8 thread with very helpful setup info and quite a few posts from Andy.

There will probably need to be some volume matching between the center and other speakers. The MS-8 may have setup issues if there are significant output differences between the speakers.
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