PSB Speakers CHS212 owner manual VI. Quick Start, aCarpet Use, bHard Floor or Shelf Use

than about 80Hz in order to avoid gaps in the overall system response, then you might well be able to localize specific sounds from the sub. This can be very distracting when these sounds appear to come from beside or behind you. One solution is to make sure the subwoofer is in the front of the listening area; another is to use multiple subwoofers to make such sounds more diffuse.

Subwoofers also offer a phase control so the upper frequencies they produce will not cancel out the lower frequencies of the satellites. A judicious tweaking of this control can pay major dividends in spectral smoothness in the crossover area. Phase changes with frequency, however, so these controls may need readjusting every time you vary the cutoff frequency.

Also adjustable is the overall level of the subwoofer's output. Many users tend to set this too high at first, in an effort to achieve truly impressive bass. Again, smooth response is the aim, and it may well be that, if you use them, two subwoofers end up being set differently—if, for example, one is in a corner and the other is not. It's all part of the overall-balancing act that is bass management in real rooms.

We get virtually no inquiries about subwoofer placement from customers, which is a good indication that it's not something over which people lose much sleep. A good subwoofer is such a pleasure when used with a good main speaker that enjoyment is definitely the rule.

VI. Quick Start

If you cannot wait to hear your new PSB subwoofer: Turn off all other components, and follow one of the connection diagrams. Connect the supplied power cord to the AC power socket. Set the PSB subwoofer volume control to its minimum position (counterclockwise), then plug the subwoofer into an active AC outlet. The same receptacle as the rest of your audio/video system or another on the same electrical circuit should be used to avoid ground hum. Set the subwoofer's Sub Cut-Off Frequency control to its midpoint, and the phase switch to 0°. Flip the Power Switch to the on position. Play a bass-rich program source, and slowly bring up the Sub Volume control (clockwise) until the subwoofer contributes a natural level of low frequency sound. Now please read the rest of this guide and fine-tune your installation accordingly—it will be time well spent!

Adjustable Rubber Leveler and Adjustable Spike Installation

Screw the supplied levelers or spikes into the threaded inserts located in the base, bottom or in the four feet attached to the bottom of the subwoofer. Speaker spikes are for carpet use. Threaded rubber isolation levelers are for shelf or hard floor use.

a)Carpet Use

Screw a spike with a lock nut attached into the insert located in the base, bottom or in each of the four feet attached to the bottom of the subwoofer. Locate the subwoofer, adjust to the desired height (higher for thicker carpet) by turning the spikes and tightening the lock nuts.

b)Hard Floor or Shelf Use

Screw a threaded rubber isolation bumper with a lock nut attached into the insert located in the base, bottom or in each of the four feet attached to the bottom of the subwoofer. Locate the subwoofer, adjust to the desired height by turning the rubber isolation bumpers and tightening the lock nuts.

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