Supplement for Powered Subwoofer Outputs
The EQ901 when set in tone modes 1, 2 & 3, outputs ports 1 & 2 plus 3 & 4 (dual stereo) in the full range mode. In tone mode 4 the EQ901 is in powered subwoofer mode and engages the active crossover, with the upper range hi pass on outputs 1 & 2, and subwoofer low pass on outputs 3 & 4. The low pass outputs 3 & 4 are the monaural combination of inputs 1 & 2.
Active Subwoofer Mode - Tone Mode 4
Active crossover configuration
In tone modes 1, 2 & 3, all outputs in the full range mode. In tone mode 4 the EQ901 is in powered subwoofer mode and engages the active crossover, with the upper full range on outputs 1 & 2, and subwoofer low pass on outputs 3 & 4.
When audio input and output connections are being made, be sure that all associated equipment is powered off. Also, when you power the EQ901 on and off, be sure that the associated equipment is off. Connect power to the EQ901 before turning associated equipment on.
Your EQ901 is being delivered with an internal level (gain) setting of 0db (max, no insertion loss), which you will adjust with the supplied remote control. It has been set with the analog Inputs selected, be sure to turn down your music source to protect your system at turn on. Once you have your inputs connected and all components on, you can adjust all the gain levels for optimal volume mid-position control performance.
Subwoofer Settings for Tone Mode 4
To begin, your subwoofer should be set at mid level gain, and the crossovers should be set at the highest frequency or disabled. After you have the system up and running adjust the subwoofer level, phase, and crossover to get the best response.
USB Music Server Volume Setting
If you are streaming digital music via a server such as foobar2000, JRiver, Roon, etc., begin with the level set low on the server application.