Our 15″ passive, sealed sub is an affordable, versatile sub that can either be powered by a dual channel master Hamrammr Sub 15 Active or another external power source.


This sealed, high powered sub will provide both excessive levels of SPL in combination with quick and precise response. This passive version can be powered by the additional channel of the active Sub 15 or an external amplifier.

– Bjørn Erik Forberg, Chief Designer

Out passive 15″ sub can be powered either by a master Hamrammr Sub 15 Active or an external amp.

A magnetic front grille is included.

The sub is only 30cm deep, making it a perfect fit for baffle wall installations. The detachable rubber feet make it feasible as a free-standing sub as well.

Three channels are located on each side and below, allowing for easy cable management as well as the possibility of running hidden cables beneath the sub.

The cabinet is made out in thick, 25mm birch plywood to provide a maximum stiffness and rigidity.


Speaker type Sealed 15" sub designed by Hamrammr
Amplifier Passive, speakon input
Driver size 15"
SPL 117dB peak in-room
Power handling RMS / MAX -
Xmax 19mm
Magnet Ferrite
Voice coil diameter 2,5"
Impedance 4Ω (Dual coil 2Ohm)
Frequency response 25Hz - 200Hz (-3 dB) / 17Hz - 200Hz typical in-room 
Dimensions / weight 96cm (H) x 48cm (W) x 31cm (D) / 45 kilos
Cabinet construction 25mm birch plywood & tour-grade textured finish
Application Baffle wall or free standing subwoofer
Included accessories 3m speakon cable (used to connect the active Hammramr sub)