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How do i figure out the lowest frequency reponse on my subs? trying to figure out the LPF setting!?
I need to figure out where to set the LPF correctly on my Hifonics Bxi2608 amp.
to my knowledge, to set this seting correctly i have to add up the low freqency response to each speaker, but i cant figure it out….
heres the specs:
2 12″ re audio sxx dual 4ohm:
Electrical Q Value -Qes: 0.32
Mechanical Q Value -Qms: 4.4
Total Speaker Q Value -Qts: 0.30
Free Air Resonance -Fs: 30.6 Hz
Equivalent Compliance -Vas: 47.6 liters
One-Way, Linear Excursion -Xmax: 22 mm
Efficiency -SPL 1W/1m: 88.1 dB SPL
Effective Piston Area -Sd: 480 cm^2
DC Resistance -Re: 1.9 ohm
Nominal Impedance -Znom: Dual 2/4 ohm
Thermal Power Handling -Pe: 1000 W
Force Factor -Bl: 21
thanks
You’re making it more complicated than it needs to be.
The low-pass filter setting will determine the highest frequency that your subs will play, not the lowest frequency. For example, if you set it for 80, then all the bass tones below 80Hz will pass to the subs, and the output will start to roll off above 80Hz.
Ideally, you want the subs to start playing about where the rest of the speakers leave off. For example, if your other speakers have a frequency response of 60Hz to 20kHz, then you’d probably set the low-pass filter to 60Hz. However, you can’t always trust the published frequency response specs of the speakers.
You can more or less just set it however it sounds best to you.
Your amplifier may also have a subsonic or infrasonic filter. If so, you’d use this if you have a ported sub box; and you’d want to set it to the box’s port frequency. If you have a sealed box, you don’t really need the subsonic filter.
