Description: The THREE.2 is a combination equalizer/preamp/crossover/line
driver. The 1/2 DIN chassis can be mounted in-dash, or under-dash using the included brackets.
3 Band Graphic EQ: The rotary knobs adjust the signal +/-12 dB
at 125 Hz, 1.25 kHz, and 10 kHz. There's a notch at each knob's center position so
it's easy to return to the flat setting.
Para-Bass: Para-Bass is a single band, parametric equalizer for
the bass output. Like the three graphic EQ bands, the adjustment range is +/-12 dB;
the center frequency is continuously variable from 40 Hz to 80 Hz.
Crossover: The THREE.2 has built-in high-pass and low-pass
crossovers. The high-pass is applied to the front and rear line outputs. The
low-pass is applied to the subwoofer output. The crossover slope is 24 dB/octave
and the factory crossover point is 90 Hz; the crossover point is governed by a
replaceable chip; replacement chips range from 30 Hz to 3,500 Hz. The crossover
can also be bypassed if you're not using a subwoofer, sending a full range signal
to the front and rear outputs.
Line Driver: To achieve the best possible signal to noise
ratio and dynamic range, the built-in line driver can increase the head unit's
output voltage up to 20 dB (up to 9.5 volts RMS/13 volts peak).
Volume: If you choose, you can adjust the system volume using
the THREE.2's volume knob. This allows you to leave the source volume at it's
maximum un-clipped level, resulting in the best signal to noise ratio and dynamic
range output from the source.
Subwoofer Level Control: The relative subwoofer volume is
adjusted using the rotary Sub Level control on the front panel.
Fader: Because there is only one stereo line input and both
front and rear line outputs, the front panel fader knob is needed to adjust the
relative front and rear volume.
Auxiliary Inputs: The THREE.2 has two auxiliary inputs,
3.5mm mini-jacks on the front and rear panels. When a cable is plugged into the
front panel input, it overrides the rear panel input. The front panel Source
button switches between the auxiliary inputs and the RCA line input.
Input Gain: The input gain for the left and right channels
is set independently; 0 dB to +20 dB. The +20 dB gain allows you to increase the
head unit's line voltage to the top of your amp's input range; up to 9.5 volts
RMS/13 volts peak. A yellow Maximized LED starts to flicker as you reach the
maximum unclipped voltage.
Balanced Input: Using the balanced differential input circuit
may cancel noise picked up in the transmission line between the THREE.2 and the
Ground Isolation: The power supply ground is switchable, in
case of ground loop noise. The factory position is fully isolated (typically the
best choice), but can be changed to Ground or 200Ω.
Terminal Blocks: The power/ground/remote/illumination terminal
is removable; the wiring is attached to the block, then the block is plugged into
the rear panel of the THREE.2.
Illumination: The outer ring of each knob is lit whenever the
illumination terminal is energized. The color is switchable between blue and
red. Wiring the illumination terminal to a dimmer circuit allows you to adjust
- RCA main input; rear panel
- Auxiliary 3.5mm mini-jack; rear panel
- Auxiliary 3.5mm mini-jack; front panel
- Front outputs; RCA; rear panel
- Rear outputs; RCA; rear panel
- Subwoofer outputs; RCA; rear panel