About the AudioControl FOUR.1
This is not your father's EQ
This is not your father's EQ
AudioControl's FOUR.1i equalizer takes the old-school in-dash EQ to a whole new level. This little problem solver features 4-band equalization, a parametric bass equalizer, and a built-in line driver that'll send a hot, clean signal to your amps.
Find those trouble spots
Mount the FOUR.1i in your vehicle's dash opening along with your receiver, or under the dash if space is an issue. For connections, you'll find a set of inputs, front and rear outputs, and an auxiliary input for an iPod or other audio source. You can adjust response at 125, 500, 2000, and 8000 Hz, then use the parametric EQ to find and kill any bass trouble spots between 40 and 80 Hz.
Set up in an instant
AudioControl makes it easy. Bring up your input knob until its LED starts to flicker, then adjust your output level to get the most out of your amplifiers. You can switch between your main and auxiliary sources with the touch of a button. The ground isolation selector allows you to minimize noise in your system. You can choose between green or amber illumination.
Information provided by AudioControl
- in-dash equalizer with line driver
- steel chassis with gold-plated RCA jacks
- 4-band EQ (125, 500, 2000, and 8000 Hz) with parametric equalization for bass (adjustable from 40 to 80 Hz, +/-12 dB)
- balanced inputs eliminate noise
- line driver increases output up to 9.5 volts RMS
- inputs: stereo RCA, auxiliary RCA
- outputs: front and rear
- green or amber illumination
- frequency response: 10 to 100,000 Hz
- signal-to-noise ratio: 110 dB
- fuse rating: 1 amp
- size: 6-3/4"H x 5"W x 1"D
- weight: 2 pounds
- warranty: 5 years
- Our 60-day money-back guarantee
- MFR # 841-016-5
What's in the box:
- Pre-amp line driver/EQ
- 2 Mounting brackets
- 4 Mounting screws
- Owner's manual
- QC checklist
- Product registration card
More details on the AudioControl FOUR.1
Description: The Four.1i is a combination equalizer/line driver. The 1/2 DIN chassis can be mounted in-dash, or under-dash using the included brackets.
4 Band Graphic EQ: The rotary knobs adjust the signal +/-12 dB at 125 Hz, 500 Hz, 2 kHz, and 8 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 four graphic EQ bands, the adjustment range is +/-12 dB; the center frequency is continuously variable from 40 Hz to 80 Hz.
Line Driver: To achieve the best possible signal to noise ratio and dynamic range from your amplifier, the built-in line driver can increase the head unit's output voltage up to 20 dB (9.5 volts RMS/ 13 volts peak).
Aux In: In addition to the main input, there is an auxiliary input (stereo RCA). A switch on the front panel toggles between the two inputs.
Volume: If you choose, you can adjust the system volume using the Four.1i'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.
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.
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.
Balanced Inputs/Outputs: Using the balanced differential input circuit cancels noise picked up in the transmission line between the Four.1i the the source unit, or between the Four.1i and the amplifiers. Both the main and auxiliary inputs and the outputs can be individually set to balanced or unbalanced, incase your amps don't accept balanced inputs.
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 Block: 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 Four.1i.
Illumination: The outer ring of each knob is lit whenever the illumination terminal is energized. The color is switchable between green and amber.
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