Mini Subwoofer 5″ – 6″ BandPass 4th Order Isobaric

The order of 4 or sealed rear chamber bandpass system is essentially a system of watertight enclosures with the addition of an acoustic filter for the driver. The resulting system usually provides a lower cut-off frequency, the compromise that a larger case. The space can be reduced by two drivers in isobaric configuration.

4th-order bandpass systems generally show better able to handle the functions that the other major systems are considered. The transient response and is second only to the sealed enclosure systems, making it a good choice for subwoofer applications.

Since all output 4th order bandpass system is via the port, the largest diameter possible for the port area should be used to minimize noise from the port. The ports must be incinerated where possible, for the same reasons.

4th order Ssobaric Subwoofer Box Design

The 4th order bandpass system rarely allows a perfect bandpass response - there is usually an out-of-band noise present in the production. A notch filter can be used simply to reduce the noise as audible. Otherwise, a lowpass filter used in series with the driver, but the in-band response system may be affected if this approach is taken.

As the speaker sound 4th order band pass issued by the openings or ports on the port side of the box, the port noise inevitable.

This unwanted noise can be minimized by a notch filter and the largest diameter possible for the port of the area should definitely be used. Another option is to burn the ports of the 4th order bandpass room as this will certainly help to reduce unwanted extra from the subwoofer.

Mini SubWoofer Power Amplifier clik for detail



Nominal Basket Diameter 5 "/ 125mm

Impedance 8 ohm

RMS Power 50 Watts

Program Power 100 Watts

Frequency response 50Hz - 12.0kHz

Sensitivity (1W/1m) 91dB

Voice Coil Diameter 1 "/ 25.8mm

BL Factor 6.4 N / A

Voice Coil Length 14 mm

Air Gap Height 6mm

X Damage (peak to peak) 20 mm

Magnetic Assembly Weight 2.2 lbs / 1.0 kg.

Edit Information

Diameter 5.28 "/ 134mm x 5.28" / 134mm

Bolt Circle Diameter 5.4 "/ 137mm

Baffle Cutout Diameter --

- Front Mount 4.72 "/ 120mm

Many of the 4 mounting holes

Volume displaced by driver, 019 m 3 / .5 liter

Total Depth 2.68 "/ 68mm

Net weight 2.64 lbs / 1.2 kg.

Weight 2.8 lbs / 1.27 kg.


Basketball aluminum diecast

Polypropylene cone

Rubber Surround

Voice Coil Wire Copper


Thiele-Small Parameters

Resonance Frequency (FS) 60 Hz

Impedance (Re) 5.33 ohms

Coil Inductance (Le) 0.4 mH

Mechanical Q (Qms) 1.604

Electrical Factor (Qes) .35

Total Q (Qts) .29

Comp. Equivalent Vol. (Vas) 35 FT3 / 9.8 Liter

Voice Coil Overhang (Xmax) 4.0mm

Reference yield 5%

Volume Displacement 34 cm3

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