I am looking to properly setup my JBL MS-8 to the best of my ability.
Sorry for my long first post, but wanted to provide as much info as I had available to me to get settings recommendations.
I need to configure the crossover settings on my JBL MS-8 before doing the timing and delays using the headset microphone. So I was wondering, using the data below, what you audio pros would recommend I set the crossover frequencies and slopes to during the MS-8 setup. Or any other settings I should look at. I know it won't be perfect without measurement tools, just looking for a good starting point, or what settings you would use 9/10 times given the situation.
I am mainly just confused, what 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, can I set them as I normally would with a multimeter to get best output or do I have to under compensate for the center channel not being amped and will be directly connected to the output on the MS-8? Just don't want the center to sound washed out.
Thanks for any recommendations / suggestions you could provide. I just want the best suggestions to get great sound, doesn't have to be perfect. I do not own an oscilloscope, but I do have a fluke multimeter to set amplifier gains and such using various test sine waves.
2014 Ford Fusion Titanium AWD 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, (not sure of output voltage at max volume...), instead of processed audio to reprocess again by MS-8.
Front and Rear (In Front and Rear Doors - Two Sets):
Polk SR5250 (2-way) - 5-1/4" - Connected to Kicker SX700.4 from MS-8 RCA
Using Polk Crossovers - Connected to amp in 1-way setup.
MS-8 --> Amp --> Polk Crossover --> Woofer/Tweeter (Separate Outputs)
Continuous Power Handling: 50-100 Watts
Peak Power Handling: 200 Watts
Impedance (Nominal):4 Ohms
Frequency Response (+/-3dB): 60 Hz - 30 kHz (30,000 Hz)
Sensitivity (2.83V): 89 dB
Crossover Frequency: 4600 Hz (2-way external Zobel crossover network including Mylar Film Capacitors and Air-Core Inductors)
Driver Crossover Slope (Low Pass): 2nd Order, 12 dB/Octave
Tweeter Crossover Slope (High Pass): 3rd Order, 18 dB/Octave
Tweeter Attenuation Level Settings: +2 dB, 0 dB, -1.5 dB, -3 dB
22mm Ring Radiator - Tweeter
Aerated Polypropylene / Butyl Rubber - Woofer w/Phase Plug
Front Center Speaker (Connected directly to MS-8 Output (Internal Amp)):
Kicker 41KSC354 3-1/2" (Tweeter 1/2")
RMS: 2-50 Watts
Sensitivity: 88 dB
Frequency Response: 80Hz-20kHz
Subwoofer - Vented (In Trunk - Pointed towards vehicle tail, not cabin):
Kicker 12" Solo-Baric L7 (2007) 04VS12L74 - Connected to Kicker SX650.1 from MS-8 RCA - 2-Ohm
Power Handling (RMS): 750 Watts (w/25Hz, 24dB/octave subsonic filter), 400 Watts (without subsonic filter)
Frequency Response: 24-100Hz
Two 4-Ohm Voice Coils - Parallel Wiring (2-Ohm Final Impedance)
Sensitivity: 87.4 dB
Digital Amplifiers (Built-in DSP/Crossovers currently disabled):
RMS @ 13.8V (Input Power): 82x4 Watts 4-Ohm (2 Separate Internal Amps)
Frequency Response: 20Hz - 20kHz
SNR: >100 dB
Input Sensitivity: 62.5mV-16V
Kicker SX650.1 (Class D)
RMS @ 13.8V (Input Power): 325 Watts 4-Ohm
RMS @ 13.8V (Input Power): 650 Watts 2-Ohm
Frequency Response: 20Hz - 200Hz
SNR: >98 dB
Input Sensitivity: 62.5mV-16V