this product will enhance any system 1000%. Best EQ I ever used, clean sound, and hard hitting very well made, KUDOS to Sonic.
In-Dash Car Audio Equalizer with Auxiliary Input & 5-year warranty*!
For over two decades, AudioControl has been designing and manufacturing award-winning autosound products at our factory located in the rainforests of the Pacific Northwest. During this period, countless sound-off winning contestants have chosen AudioControl products to give them the competitive edge. "Can you really win without AudioControl", was part of an article written commenting on competition winning systems. Nothing sounds better than an awesome recording played back on a kickbutt system. Unfortunately, the acoustics of your vehicle can take away from your systems performance. While AudioControl products do not change the laws of physics (although they act like they do), autosound enthusiasts have long known that AudioControl products "make good stereo sound better"
FOUR.1i - In-dash Equalizer with Aux Inputs
If your performance car audio system is designed for maximum sound quality and maximum control, then the FOUR.1i is the car audio processor for you. Designed to be the world's first professional quality in-dash equalizer, the FOUR.1i boasts such features as 13 volt signal capabilities, a master volume control, and auxiliary inputs for secondary sources. In addition, five equalization controls give just the right amount of control for the user. AudioControl's line of in-dash car processors offer features and functions that allow you to adjust and tweak your performance car audio system from the convenience of the driver seat. Included are features like equalization, electronic crossovers, master volume control, and high voltage line drivers.
Graphic Stereo Equalization:
The FOUR.1i turns the dashboard of your car into a mini-mixing board, just like those in a recording studio. The FOUR.1i has four frequency controls set at 8000Hz, 2000Hz, 500Hz, and 125Hz. These controls will make dramatic improvements in any system.
You want bass, we've got bass. This specially designed parametric control lets you adapt the bass response of any system to your listening desire. Given all of the various types of music combined with numerous possible bass response anomalies in every vehicle, a single equalization control for bass just doesn't cut it. It's like painting a picture with only one color . . . BORING!
Pre-Amp Line Driver:
Talk about your ironies. To operate with maximum dynamic range and the best signalto-noise ratio amplifiers require a high voltage input signal (generally 2 to 5 volts) . On the other hand, typical source units only put out 1 to 2 volts, (if you're lucky!) In a system where the source unit is located in the front of the car and the amplifiers are located in the rear, the length of the connecting cables will also cut the strength of the signal. The FOUR.1i includes a line driver that takes the weak output voltage of a head unit and increases it up to 20dB (up to 13 volts peak) and then delivers it downstream to the amplifier inputs.
The FOUR.1i has an "AUX" switch on the front to allow you to switch back and forth between sources. If you are thinking about adding a video system, or even that extra compact disc player or DVD player, the FOUR.1i makes hook-up a snap!
Balanced Inputs & Outputs:
The FOUR.1i uses a unique balanced differential input circuit that helps cancel any noise that radiates into the signal path between the source unit and your FOUR.1i. The FOUR.1i then sends this balanced signal downstream to another processor or amplifier that has balanced inputs (blatant plug for AudioControl products) which will keep it noise-free.
- Stereo Graphic Equalization
- Switchable Backlighting Color (Amber/Green)
- Para-BASS Low Frequency Controls
- Pre-amp Gain: 20 dB
- Line Driver: 13V Peak Output
- Balanced Differential Inputs and Outputs
- High-Headroom PWM Switching Power Supply
- Main and Auxiliary Switchable Inputs
- Master Volume and Fader Control
- Selectable Ground Isolation
- Optimum Voltage LED
- Weight: 2 lbs
- Size: 1.00" H x 6.75" W x 5.00 "D
- Authorized Internet Dealer
- 5 Year Manufacturer's Warranty (*when installed by an authorized AudioControl dealer)
- Maximum input/output level: 9.5Vrms/13V peak
- Frequency response: 10 - 100,000 Hz; ±1dB
- Total harmonic distortion: 0.005%
- Signal to Noise ratio: -110dB
- Input Impedance: 20Kohms
- Output Impedance: 150ohms
- Input gain: 20dB
- Inputs: Switchable 2 source, 2-channel
- Balanced inputs: Yes (switchable)
- Balanced Outputs: Yes (switchable)
- Output ground isolation jumpers: Yes
- Equalization Cut/Boost: ±12dB
- Power supply: High-headroom PWM switching
- Power draw: 250mA
- Recommended fuse rating: 1 Amp
- Illumination Color: switchable green or amber
- Country of origin: U.S.A
Check out the AudioControl FOUR1i Owner's Manual
A graphic equalizer typically has more adjustable bands and is less expensive, whereas a parametric will have fewer bands but offer a greater level of control and provide more tuning options. Digital equalizers will tune your system with the most detail and precision but require a computer and are typically a little higher in price.
A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.
When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.
Warranty and Return Policy
Summary of Customer Ratings & Reviews
Long Island City, NY
May 31, 2010
21 of 25 found this helpful
August 10, 2010
I bought this for the wife's car, hooked-up to the factory deck, and a JL 5/500 amp. I wanted her to have some equalizer capability and a way to connect her iPod. Works as stated and integrates into the system as planned.
19 of 23 found this helpful
October 1, 2016
This is a great product from AudioControl, 24/192 Audio from my Computer to my D/A converter, then to AudioControl's Aux-in with Preamp-outs. Then Going to amplifiers. Such a neat device.
0 of 0 found this helpful
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Internal Product ID
Wiring Diagram Legend
Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.