Komsan6063 10+ year member
Junior Member
Ok so basically one of my subs blew on my average *** system so i was thinking about replacing it. My options as of now are 2 Fi Bl 12s fully loaded in a sealed box or 1 Fi sp4 15 inch sub fully loaded in a ported box. here are the stats for both the subs. Basically im looking for something that will shake the **** out of my car. I typically listen to trap music, some dub step, and a bit of house. I want what is best for that shaking and the one that is most durable and will take the most beating. Thanks!
SP4 Series: Currently in 15” and 18”
Dual 1 and Dual 2 Ohm (custom options available)
Extra heavy aluminum basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Single layer wide foam surround
Push terminals
144 tinsel count leads
FEA optimized motor
High Flux density design
4” diameter 4 layer coil (Flatwind standard)
Double stack magnets
Five progressive 10" spiders
Optional Heli-cool systerm
Machined in house at Fi
And many other custom options
SP415
DUAL 1 | DUAL 2
Fs: 27.6 Hz | 27.9 Hz
Re: 0.65 Ohms/coil | 1.27 Ohms/coil
Qms: 6.56 | 6.45
Qes: .52 | .52
Qts: .48 | .48
Mms: 434g | 424g
Cms: 0.77mm/N | 0.77mm/N
Sd: 810cm^2 | 810cm^2
Vas: 70.4 l | 70.4 l
Spl: 86.4dB 1W/1m | 86.5dB 1W/1m
Bl: 13.7 N/A | 19.1 N/A
Xmax: 33mm | 33mm
Rms: 3000W | 3000W
Sealed box: 2-3.5cuft | 2-3.5 cuft
Ported box: 3-5cuft | 3-5cuft
Sub OD: 15.625” | 15.625”
Cut ID: 14.125” | 14.125”
Mounting depth: 11.250” | 11.250”
Displacement: 0.21cuft | 0.21cuft
BL Series: 10”, 12”, 15”, and 18”
Dual 1 and Dual 2 Ohm (custom options available)
Cast basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Single layer wide foam surround
Push terminals
16 integrated leads
FEA optimized motor
High Flux density design
3” diameter 4 layer coil (Flatwind option)
Double stack magnets
Five progressive spiders
Optional Heli-cool systerm
Machined in house at Fi
And many other custom options
BL12
DUAL 1 | DUAL 2
Fs: 35.2 Hz | 39.8 Hz
Re: 0.7 Ohms/coil | 1.4 Ohms/coil
Qms: 4.68 | 4.72
Qes: .25 | .25
Qts: .24 | .24
Mms: 212g | 212g
Cms: 0.96mm/N | 0.96mm/N
Sd: 480cm^2 | 480cm^2
Vas: 31.2 l | 31.2 l
Spl: 89.1dB 1W/1m | 89.1dB 1W/1m
Bl: 16.6 N/A | 22.7 N/A
Xmax: 18mm | 18mm
Rms: 1500W * | 1500W *
Sealed box: N/A cuft | N/A cuft
Ported box: 1.5-2.5cuft | 1.5-2.5cuft
Sub OD: 12.500” | 12.500”
Cut ID: 11.125” | 11.125”
Mounting depth: 6.750” | 6.750”
Displacement: 0.18cuft | 0.18cuft
SP4 Series: Currently in 15” and 18”
Dual 1 and Dual 2 Ohm (custom options available)
Extra heavy aluminum basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Single layer wide foam surround
Push terminals
144 tinsel count leads
FEA optimized motor
High Flux density design
4” diameter 4 layer coil (Flatwind standard)
Double stack magnets
Five progressive 10" spiders
Optional Heli-cool systerm
Machined in house at Fi
And many other custom options
SP415
DUAL 1 | DUAL 2
Fs: 27.6 Hz | 27.9 Hz
Re: 0.65 Ohms/coil | 1.27 Ohms/coil
Qms: 6.56 | 6.45
Qes: .52 | .52
Qts: .48 | .48
Mms: 434g | 424g
Cms: 0.77mm/N | 0.77mm/N
Sd: 810cm^2 | 810cm^2
Vas: 70.4 l | 70.4 l
Spl: 86.4dB 1W/1m | 86.5dB 1W/1m
Bl: 13.7 N/A | 19.1 N/A
Xmax: 33mm | 33mm
Rms: 3000W | 3000W
Sealed box: 2-3.5cuft | 2-3.5 cuft
Ported box: 3-5cuft | 3-5cuft
Sub OD: 15.625” | 15.625”
Cut ID: 14.125” | 14.125”
Mounting depth: 11.250” | 11.250”
Displacement: 0.21cuft | 0.21cuft
BL Series: 10”, 12”, 15”, and 18”
Dual 1 and Dual 2 Ohm (custom options available)
Cast basket
Wrap around gasket
Kraft pulp fiber reinforced cone
Single layer wide foam surround
Push terminals
16 integrated leads
FEA optimized motor
High Flux density design
3” diameter 4 layer coil (Flatwind option)
Double stack magnets
Five progressive spiders
Optional Heli-cool systerm
Machined in house at Fi
And many other custom options
BL12
DUAL 1 | DUAL 2
Fs: 35.2 Hz | 39.8 Hz
Re: 0.7 Ohms/coil | 1.4 Ohms/coil
Qms: 4.68 | 4.72
Qes: .25 | .25
Qts: .24 | .24
Mms: 212g | 212g
Cms: 0.96mm/N | 0.96mm/N
Sd: 480cm^2 | 480cm^2
Vas: 31.2 l | 31.2 l
Spl: 89.1dB 1W/1m | 89.1dB 1W/1m
Bl: 16.6 N/A | 22.7 N/A
Xmax: 18mm | 18mm
Rms: 1500W * | 1500W *
Sealed box: N/A cuft | N/A cuft
Ported box: 1.5-2.5cuft | 1.5-2.5cuft
Sub OD: 12.500” | 12.500”
Cut ID: 11.125” | 11.125”
Mounting depth: 6.750” | 6.750”
Displacement: 0.18cuft | 0.18cuft
