- 2 x 8” BMW upgrade subwoofer
- Fits perfectly into the original mounting positions under the front seats of all BMW model ranges with under-seat subwoofers
- Extremely stiff fiberglass cone for maximum sound pressure
- 1 x 2 Ohms impedance per woofer
- Oversized 42.5 mm / 1.7” voice coil for high power handling
- BMW connection cables for original BMW cable harness are included in delivery
- Perfectly combinable with the MATCH UPGRADE amplifiers MATCH UP 7BMW and UP 7DSP
- Also ideal for universal use in ultra-flat subwoofer constructions
Technical data
Power RMS / max. | P | 200 / 400 Watts | |
Impedance | Z | 1 x 2 Ω | |
DC resistance | Re | 2.0 Ω | |
Resonance frequency | Fs | 49 Hz | |
Mechanical Q factor | Qms | 3.80 | |
Electrical Q factor | Qes | 0.61 | |
Total Q factor | Qts | 0.53 | |
Compliance | Cms | 210 µm/N | |
Equivalent air volume | Vas | 13.9 L | |
Force factor | B*I | 7.1 Tm | |
Efficiency 1 W / 1 m | SPL | 90 dB | |
Cone area | Sd | 214 cm² | |
Moving mass | Mms | 47.4 g | |
Cone material | Extremely stiff fiberglass cone | ||
Mechanical resistance | Rms | 3.97 kg/s | |
Voice coil diameter | ø | 42.5 mm | |
Voice coil winding height | 12.5 mm | ||
Max. linear excursion | Xmax | +/- 4.0 mm | |
Outer diameter | ø | 239 mm / 9.41″ | |
Installation diameter | ø | 175 mm / 6.89″ | |
Installation depth | 40 mm / 1.57″ | ||
Recommended enclosure volumes | |||
Sealed box | |||
Net volume | 3 L | ||
Lower limiting frequency (-3dB) | 63 Hz | ||
DSP settings | – Highpass: Butterworth; 12 dB/octave; crossover frequency 40 Hz – Additional EQ filter: center frequency 90 Hz; Q factor 3.0; gain -4 dB – Lowpass: Butterworth; 24 dB/octave; crossover frequency 80 – 100 Hz |
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Vented box | For one subwoofer | For two subwoofers | |
Net volume | 12 L | 24 L | |
Port diameter | ø | 60 mm / 2.36″ | 80 mm / 3.15 |
Port area | 28 cm² | 50 cm² | |
Port length | 25 cm / 9.84″ | 20 cm / 3.94″ | |
Port tuning frequency | Fb | 46 Hz | 46 Hz |
Lower limiting frequency (-3dB) | 45 Hz | 45 Hz | |
DSP settings | – Highpass: Self-Define; crossover frequency 40 Hz; Q factor 1.3 – Additional EQ filter: center frequency 67 Hz; Q factor 3.0; gain -3 dB – Lowpass: Butterworth; 24 dB/octave; crossover frequency 80 – 100 Hz |
Valoraciones
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