There are three adjustments that can be made to "fine tune" the sound of the Rhythm loudspeaker system to match the sound of the room and associated equipment. These are as follows:

There are no resistors in the Rhythm Tweeter signal path. Because the crossover network has a very stable impedance compensation network, one can adjust the tweeter output by adding series resistance between the (+) binding post and the tweeter network. Small level changes can be made in 0.5dB steps by adding 0.6 Ohm, 1.00 Ohm, or 1.50 Ohm respectively. The best way to add these resistors is simply to cut the white wire that leads to the (+) binding post and add the desired resistance.

Suggested parts are a 1.00 Ohm and 1.50 Ohm Ohmite or North power resistors. The parallel combination of a 1.00 Ohm and 1.50 Ohm is the 0.6 Ohm, whilst using a single resistor will provide the other values. The connection should be made with crimp barrels and solder.

The Rhythm midrange level is controlled by the damping resistance in the T leg of the woofer crossover network. The resistors used are a pair of 1.21 Ohm in parallel, to make 0.6 Ohm. To lower the midrange level by 1.db, cut one leg of one of these resistors. This makes the damping resistance 1.21 Ohm, and softens the region between 500 and 2.0kHz. If this change is satisfactory, it is best to go back in, cut the other leg of this resistor, and remove it from the crossover board.

The extreme low end output of the Rhythm loudspeaker is controlled by the length of straws in the port tube. There is a section in the manual regarding port tuning, but following is a brief description of what to expect:

A port tube with long straws with have very deep bass but at a reduced level. One can tune the Rhythm as low as 25 Hz, but the low end output will be greatly reduced and extremely overdamped.

A port tube with short straws (or no straws) will have a lot of output but higher in frequency. One can tune the port as high as 48 Hz, and the Rhythm will produce a whole lot of boom at that one frequency.

We target a tuning between 35 and 39 Hz. This is achieved by using 5" straws pushed through the port such that they stick out 1" beyond the end of the port tube and into the cabinet. This is the optimum "QB3" alignment.

One must note it is not carved in stone what tuning will be best for the room and equipment. The loudspeaker has the ability to be tuned anywhere in the octave between 25 and 50 Hz, which an output control of about 6dB.