Sub Comparison

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Sub1 Sub2 This information is applicable to the Sub1/Sub2
B1 Bass ModuleThis information is applicable to the B1 Bass Module
B2 Bass ModuleThis information is applicable to the B2 Bass Module
F1 Model 812This information is applicable to the F1 Flexible Array Loudspeaker

SpecificationB1B2Sub1Sub2F1 Subwoofer
dB SPL at 1 meter
Continous/Peak
n/a 115 dB (continuous)
121 dB (peak)
118 dB (continuous)
124 dB (peak)
123 dB (continuous)
129 dB (peak)
124 dB (continuous)
130 dB (peak)
Watts RMS
Active/Passive
125
Passive
250
Passive
480
Active
1000
Active
1000
Active
Weight pounds 28 45 35.5 51.7 55
Drivers Two 5.25" Two 10" One 7"x13" RaceTrack One 10"x18" RaceTrack Two 10"
Cardioid Mode n/a n/a Yes Yes n/a
Compatibility with Bose Products L1 Legacy L1 Legacy L1 Pro, L1 Legacy, S1 Pro, L1 Compact L1 Pro, L1 Legacy, S1 Pro, L1 Compact L1 Pro, L1 Legacy, S1 Pro, L1 Compact
Compatibility with non-Bose products No
passive, no low-pass filter
No
passive, no low-pass filter
Yes
active, switchable low-pass filter
Yes
active, switchable low-pass filter
Yes
active, switchable high-pass filter
Two Sub1s or Sub2

Two Sub1s have approximately the same membrane surface area as the Sub2, (180 square inches).

The power difference is negligible (960 watts RMS compared to 1000 watts RMS).

Two Sub1s tightly coupled (stacked or side-by-side) should provide up to +6 dB[1] over a single Sub1 (118 + 6 = 124). The Sub 2 is 123 dB SPL. The difference is negligible.


The Sub1 goes down to 40 Hz. The Sub2 goes down to 37 Hz (-3 dB). The difference is due to the larger physical volume of the Sub2 enclosure. Running two Sub1s does not change the frequency response.


  1. +3 dB from doubling the power and +3 dB from mutual coupling.