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Great replacement for JBL, Infinity and Boston Acoustic A40 series 1 woofers.
The 4 ohm woofer is a great replacement for the Boston Acoustics A40 series I woofer. The outside diameter is 6.57".
The A40 series II woofer is similar, but the screw hole mounting is completely different and the outside diameter is 6.875".
The original A40 series 1 woofers has been discontinued from Boston Acoustics. All the specs and parameters were copied to ensure similar sound and exact physical fit. Same impedance (Re: 3.5 ohm), basket size and screw holes, so you do not have to modify the cabinet at all.
We also stock this woofer in 8 ohms
Specifications and Small Signal Parameters
Voice Coil Impedance: 4 ohm
Rated Frequency Response: 40 - 5k Hz
Sensitivity: 89 dB SPL
(Average 500 - 2.5 kHz, 2.83V, 1 meter)
Rated Power: 40 watts
Program Power: 80 watts
Magnet Weight: 340 gr (12 oz)
Fo: 45 Hz
Re: 3.5 ohm
Vas: 31 liters
Xmax: 3.8 mm
No: .49 %
This woofer features a polypropylene cone with santoprene rubber surround.
6.57" outside diameter
5.59" cutout diameter