• 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

• 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.

Note: For more additional information relating to specifications, product image, features, accessories, design, product reviews, financing offers, rewards, points, shipping, warranty, and etc. Please click on the "go to store" button on the top of this page. The link will take you to Crutchfield.com website for more additional information relating to this product.

Remember an item that comes with additional savings from 50PercentOrLess.com is obtainable by copying and pasting the promotion code onto Crutchfield.com website prior to checkout.

Links may have been changed or updated by Crutchfield.com and have not occurred on our site. To receive any discounts, please go to Crutchfield.com website and search for the product. If available please enter the promotion code to receive the discount. Thank you for visiting our site please come back again for more savings.