Subwoofer Connection

For $849 I'd probably try for a used REL or ACI. BTW the previous poster is incorrect : REL suggests corner placement is POSSIBLE with their subs due to the very low frequency of their adjustable crossovers. However I have found optimum placement to be nearer to where the Cardas method would suggest the mains should be placed.

I'm not suggesting that the Hsu is bad ... I haven't heard it. However I would look into a used REL or ACI first if music is your priority.

Hsu sub using high level inputs from your amp

The usual tips I give everyone else applies. Using a sub for a narrow bandwidth is usually a horribly inefficient way to achieve incremental benefits.

• Plug any ports in your main speakers
• Add an EQ in line with the subwoofer and configure only with measurements.
• Consider a high pass filter on your mains around 80 Hz.

As always, speaker specs are worthless once you put a speaker in a room, so measurements are essential before making any adjustments.

Generally speaking however, subs should be what you do last.  Room treatments to reduce mid-treble energy, speaker placement outside of room modes and measurements should be done first.  Look at the AM Acoustics room mode simulator for help with speaker placement.