The Model EQ16 is available in two versions: The EQ16-16; 16 mono channels, and the EQ16-32; 16 stereo channels.

Each channel of the EQ16 has 3 bands of semi-parametric equalization; Low, Mid and High bands. Each band has a frequency sweep control that is calibrated in frequency, and a boost/cut control that is calibrated in decibels.

The bandwidth of the selected frequency is automatically adjusted with the selection of the frequency sweep control. The lowest setting on any band will result in a narrow bandwidth of approximately 11 dB/octave (Q = 3.3). As the frequency sweep control is adjusted to its highest setting (fully clockwise), the bandwidth widens to approximately 4 dB/octave (Q = .8).

1. High Boost/Cut - his control provides 15dB of bell shaped boost or cut for the high frequency range (5kHz to 15kHz), and is used in conjunction with the high frequency sweep adjust (See item 2). 0dB boost/cut (flat) is obtained when this control is set to its center position.
2. High Frequency Sweep - The high frequency sweep control is used in conjunction with the high boost/cut control and provides continuous adjustment from 5kHz (fully counterclockwise) to 15kHz (fully clockwise).
3. Mid Boost/Cut - This control provides 15dB of bell shaped boost or cut for the mid band (500Hz to 5kHz) frequency range, and is used in conjunction with the high frequency sweep adjust (see item 4). 0dB boost/cut (flat) is obtained when this control is set to its center position.
4. Mid Frequency Sweep - The mid frequency sweep control is used in conjunction with the high boost/cut control and provides continuous adjustment from 500Hz (fully counterclockwise) to 5kHz (fully clockwise).
5. Low Boost/Cut - This control provides 15dB of bell shaped boost or cut for the low band (50Hz to 500Hz) frequency range, and is used in conjunction with the low frequency sweep adjust (see item 6). 0dB boost/cut (flat) is obtained when this control is set to its center position.
6. Low Frequency Sweep - The low frequency sweep control is used in conjunction with the low boost/cut control and provides continuous adjustment from 50Hz (fully counterclockwise) to 500Hz (fully clockwise).
7. EQ Bypass Switch - This switch is used to enable or disable the equalization channel. In the out position the equalizer channel is totally bypassed. When this switch is depressed, the equalizer is inserted in the channel's audio path. The green LED to the right of this switch illuminates indicating that the equalizer has been inserted into the channels audio path.