Q Acoustics Support

Q Install - Void Size for In-Wall and In-Ceiling

In-ceiling minimum void size

The In-ceiling speakers are relatively tolerant of small enclosure volumes, even below 10 litres you’re not likely to see more than a couple of dBs drop around 80 Hz until you get below 8 litres. We wouldn’t recommend anyone goes below 8 litres because the increase in pressure is likely to cause chuffing.

in-wall minimum void size

These speakers are designed to be relatively tolerant of rear enclosure volume, but clearly there will be some noticeable loss in bass extension if it gets small and the rear air compliance becomes too stiff.

Unit

Optimal (litres)

Ideally no less than

QI80RP

23 L or greater

16 L

QI65RP

19 L or greater

12 L

QILCR65RP

28 L or greater

21 L

QISUB80SP

22 L or greater

13 L


In-wall Subwoofer

The QI SUB80S is a 200mm bass driver designed for wall mounting with a 248mm cut-out and requiring 100mm depth behind it. The low-profile magnetic grille is 287mm x 287mm square.

The ideal rear cavity capacity is 22 litres or greater and it should be no less than 13 litres to avoid impacting on its bass extension. You need to connect a 50-100 watt power amplifier between the subwoofer output on your AV Receiver and QI SUB80S. We would generally recommend using 2 x QI SUB80S and thus a stereo amplifier.