Focal Polyglass 27 V1 Mode D'emploi page 3

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Connections series and parallel, combined
Depending on your installation amplifier(s), subwoofer(s), various combinations of series
and parallel circuits can be used. The real advantage of doing this is to have a system with
available power, but at the same time to ensure the system impedance load is optimum for
the amplifier(s) used.
Connection diagrams
Examples and configurations for various multiples of subwoofers:
2 subwoofers 21 V2 in parallel. Z = 2Ω
2 subwoofers in series. Z = 8Ω
Adjustment of low cut off frequency
The cut off frequency of a subwoofer is normally in the region of 60 to 100Hz. This is always
dependent on the particular installation and listening position. A frequency of 80Hz is a good
compromise for effective bass compared to listening quality.
Polyglass Subwoofers Manual
3 subwoofers 21 V2 in parallel. Z = 1.33Ω
4 subwoofers in series/parallèle. Z = 4Ω