The Blam MSA 25 is an amplified slim subwoofer featuring a 25 cm driver mounted in a die-cast aluminium enclosure with an integrated amplifier rated 250 W maximum and 125 W nominal power.

It connects to OEM head units via high-level inputs with auto turn-on or RCA low-level inputs compatible up to 6V. Controls include adjustable bass boost at 50 Hz up to 12 dB, fixed 35 Hz subsonic filter, LPF 50-150 Hz at 12 dB, 0/180 degree phase switch and external remote level control with 5 m cable. Voice coil is 2 ohm 50 mm. Size H 78 mm x D 245 mm x W 345 mm, weight 5.3 kg.