HPI12S Compact Passive Sub-Bass

A small sub with a monster footprint. Fly it, hide it, hang it, as an ultra-compact passive sub bass for mobile audio or permanent installation, the HPI12S is a spectacular performer. Light in weight and high in LF output, the HPI12S is ideally suited to small medium sized venues that require authentic sub bass with a very low visual profile.

Quest HPI12S

A Closer Look

The custom built 12" driver in the HPI12S is one of the very few loudspeakers with cone material made from Australian eucalyptus hardwood. This material has strength like a composite material but the warm sound of a cardboard cone; much loved by hi-fi enthusiasts. The benefit with the Quest driver is it can take serious punishment while still sounding like high end studio.


A (small) Pro Package

Internal rigging points allow the sub bass to be flown for permanent ceiling installation with four top mounter reinforced inserts and one extra on each side. A 35mm top hat can accommodate a standard speaker pole for mounting a satellite mid-high box. Power handling is high for such a small system with a power amplifier recommendation of 600W nominal.

Compact & Clean

The birch ply casing looks serious and is built to last the distance in a high performance environment. The angled connector panel is a thoughtful addition to act as a strain relief to the speaker connection and also make it possible to mount the box next to a wall if necessary.


Power Me Up

The HPI12S is a serious compact sub. Quest Engineering recommends an amplifier capable of delivering 500-600W (nominal) to ensure full performance. The perfect solution are Quest's QM1000P, QA2004 or the new QX4500

QA 2004Top


Rec Amplifier  480 - 720W Nom.
Impedance  8 ohm
Frequency Response  40Hz - 160Hz
Sensitivity 92 dB
Max SPL  128dB
Woofer  Custom Designed 12" Ferrite 
Connections & Wiring  2x Speakon 1+/-
Dimensions  470 x 540 x 365mm
Weight  20.5kg net
HPI12S Frequency Responsive Graph

Contact Quest

Phone: +61 (0) 3 8373 6868

Address: 86 Derby Street, Pascoe Vale VIC 3044 Australia

Find Your Local Distributor

Feel free to get in touch with your nearest distributor. We’re always happy to hear from people interested in our products and we’re always ready to help you with your next project. You can find your nearest Quest distributor on the map below.

Contact Form

For general enquiries email Quest Directly using the enquiry form below.