MIDIMAN SP-8S
User Guide

When you want to bypass the SP-8S Stereo Bass Management System, engage the HPF Bypass by switching it to the �On� position. This will defeat the �Satellites� control knob and the HPF. Optimizing the Rear Panel Settings

There are four control knobs on the rear of the SP-8S: �Level,� �Phase,� �Subwoofer� LPF cutoff frequency, and �Satellites� HPF cutoff frequency. These combined controls make it possible to optimally match the low bass frequencies from the subwoofer to your unique combination of satellite speakers, room characteristics and subwoofer position. Because of these variables, there is no single recipe for obtaining the best audio results. While you can certainly apply sound meters and other analysis equipment in establishing the right settings, most people use their ears and a few familiar recordings to determine the best settings. Setting the Level Control Use the Level control (#2) to adjust the volume of the subwoofer to properly match that of the satellite speakers. We suggest starting with this knob in the 12 o�clock position.
Note: Placement has a great deal to do with how the Level knob is set. If the SP-8S is placed on the floor against one wall in a normal room, for example, the resulting sound pressure may be as much as 3dB greater than if the subwoofer stands alone. Placement in a corner could add another 3dB of sound pressure over placement against a wall alone.

Setting the Phase Control The purpose of the Phase control (#3) is to match the phase of the Satellite HPF cut off frequency to the phase of the Subwoofer LPF cutoff frequency. Adjust the Phase in order to make sure that the Subwoofer and Satellites are in phase at the selected crossover frequency. This will allow you to achieve the maximum sound pressure and the most accurate sound quality from the whole system.
9