QM18SA Powered Sub with DSP

The QM18SA is an active powered 18" sub woofer which is suitable for both mobile applications and installation. The QM18SA features inbuilt 24bit/96kHz processing. The Class D amplifier produces a continuous 1000 watts of power and is matched with a high efficiency 18" woofer. The cabinet size and shape has been optimised to achieve a balance between portability, SPL and bass depth while weighing less than 41kg.

Quest QM18SA Active 15 Sub-bass

Road Ready

The QM18SA cabinet is made of 15mm heavy duty birch plywood and finished with an extremely resilient black coating. The cabinet is fitted with a wrap-around heavy gauge protective steel grille. The QM18SA has been crafted to endure demanding environments and is built with longevity in mind. Convenient threaded holes are provided, if you want it on wheels, just bolt them on.

Click to Rotate Speaker

Big Bass, Plug'n'Play

The Quest Engineers have designed a simplified user control interface which makes setting up and using the sub system extremely easy. The sub bass frequencies are already defined, equalised and limited to deliver the best results while providing a high passed output to a mid/high cabinet. This high pass output will provide excellent results when paired with the Quest QM450A or similar products. There is also a full range output to deliver signal to additional QM18SA.



Freq. Range (-10dB): 36Hz~140Hz
Max Calculated SPL: 133dB
Frequency Response (-3dB) 52.5Hz - 92.5Hz
Amplifier Power: 1000W
LF Transducer: 18" / 450mm
Crossover Frequency: 110Hz Preset and Optimised
Input Connector: Female XLR
Output Connector: Male XLR
AC Input: AC220~240V 50Hz/60Hz
Net Weight: 38.5kg
Shipping Weight: 43kg
Dimensions (WxHxD): 700mm x 530mm x 700mm
Carton Size (WxHxD): 790mm x 620mm x 800mm
* Quest Engineering reserves the right to make changes in specifications, or products without prior notice.
** The figures shown above are 'real world', usable specifications and are conservative as a result. Quest Engineering does not believe in portraying misleading or exaggerated specifications.
QM18SA 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.