Boss Audio Systems AVA1204 audio amplifier
Contents
1. Using High Speaker Level inputs OUTPUTS INPUTS FRonT Rear sug I R L R R R L L Q Kiis eeu Ji To Audio Inputs SUBWOOFER of AMPLIFIER lt Ii AMPLIFIER nual REAR CII IL p udio Inputs of AMPLIFIER lt II ll D gt YELLOW L To SPEAKER OUTPUTS YELLOW BLACK of RADIO head unit A ORANGE R ORANGE BLACK AVA1204 User s Manual page 5 Power connections Please note that this egualizer contains an internal ON OFF switch which is activated when the head unit is turned on For this reason in order to use this egualizer your head unit must have a remote turn on lead 008008 mm AVA1204 User s Manual page 6 Chassis ground point FUSE VIOLET to REMOTE TURN ON terminal of head unit Source ground point Specifications AVA1204 3095 AUDIO SYSTEMS 7 Band Egualizer with LED Power Meter and Subwoofer Output EA center freguencies Egualization range Freguency response Signal to noise ratio EQ THD Channel separation High level input voltage Low level input voltage Defeat equalizer Power supply Output voltage 60Hz 150Hz 400Hz 1 kHz 3 kHz 6kHz 15kHz 12dB boost cut 20Hz 20kHz 60dB less than 0 05 45dB 4V 0 5v OdB 1dB 10 16V negative ground 1 5V All specifications subject to change without notice AVA1204 User s Manual page 7 Notes BOSS AUDIO SYSTEMS2. 3095 AUDIO SYSTEMS AVA1204 7 Band Egualizer with LED Power Meter and Subwoofer Output Congratulations on your purchase of a 3085 Equalizer It has been designed engineered and manufactured to bring you the highest level of performance and quality and will afford you years of listening pleasure Thank you for making SS your choice for car audio AUDIO SYSTEMS entertainment page USER S MANUAL CONTENTS vn G R Bh ON How an equalizer is used System application Front panel controls and features Installation Mounting the equalizer Audio connections Power connection Specifications AVA1204 User s Manual page 1 How an egualizer is used The 399S AVA1204 is a high fidelity signal processor preamplifier that al lows you to graphically view and indi vidually control a number of different freguency bands in a stereophonic system It is intended for use in a car audio system which includes amplifiers in the signal path AFTER the egualizer and provides Front Rear and Subwoof er LOW LEVEL outputs via RCA con nectors This graphic egualizer consists of sev eral audio filters each centered at a specific freguency in the audio range The AVA1204 enables you to cut or boost the output level by up to 12dB as desired at the following freguencies 60Hz 150Hz 400Hz 1kHz 3kHz 6kHz e 15kHz In addition the subwoofer channel level can be controlled independently and eit
3. ers or exhaust lines or where it will be subject to contact with dust dirt moisture or excessive vibration AVA1204 User s Manual page 4 Mounting the equalizer The AVA1204 is designed to be installed to the underside of your vehicle dashboard or other similar surface using the screws and brackets provided Install the unit securely according to the diagram below 8 Angle brackets Turning on the power The AVA1204 has internal ON OFF circuitry which responds to turning ON or OFF the head unit of your car audio system This reguires that your head unit have a remote turn on lead available on the rear panel which most head units have With this convenient remote turn on off feature you never have to worry about turning off the power to the egualizer when you shut off the audio system Setting system power output levels The AVA1204 does not have Volume Level controls Therefore all of your audio system level controls are made at the head unit Audio connections Review the diagrams on the next two pages and connect the unit as shown Using Line Level inputs OUTPUTS INPUTS FRonT rear sus I M D gt To OUTPUTS of RADIO ML D gt head unit To FRONT Ji Audio Inputs of AMPLIFIER Il To REAR cf To Audio Inputs Audio Inputs i l SUBWOOFER of AMPLIFIER fl IC D gt AMPLIFIER CAUTION Use Low Level RCA inputs OR High Level speaker inputs not BOTH
4. f these controls represents a range of freguencies surrounding a center freguency to cover the audio spectrum from subwoofer freguencies to treble freguencies Adjust these controls to suit your taste and listening environment Each center freguency can be adjusted 12 dB Front panel controls and features oooo oooo 0000 oooo FADER Use this control to balance the sound level between front and rear speakers as desired EQ ON OFF SELECTOR This button permits you to turn on and off the equalization provided by the AVA1204 X BASS PROCESSOR ON OFF The AVA1204 features a bass enhancement circuit called X BASS Use this when you want to emphasize the bass portion of your audio AVA1204 User s Manual page 3 Installation Before installing your new BUSS equalizer please become familiar with all the information contained in this manual Choose a mounting location where the unit will not distract or otherwise interfere with the driver s ability to control the vehicle Use only the installation parts and hardware provided with the unit to ensure proper installation Using other parts can cause malfunction and possible damage to your BOSS equalizer Avoid installing the unit in a location which is subject to high temperatures direct sunlight hot air from such sources as heat
5. her 50Hz or 150Hz can be se lected as the center frequency for the bass level control The AVA1204 also features a bass en hancement circuit called X BASS This allows you to add additional emphasis to the bass frequencies in the audio spectrum AVA1204 User s Manual page 2 System application A stereo input signal is applied to the equalizer using EITHER but not both the low level RCA inputs from your head unit s LINE OUT connectors or from high level inputs the head unit s speaker outputs The user adjusts the various boost cut levels at the desired fre quencies The resulting adjusted sig nal is then distributed from the Front Rear and Subwoofer stereo RCA jacks on the rear of the unit to an amplifier for each of these channel pairs 3088 AVA 1204 Ego EE pog oon ppo ol Ai L Ai ol 1 LED LEVEL METER SUBWOOFER FREQUENCY SELECTOR This control is used to set the center freguency for the subwoofer channel at either 50Hz or 150Hz This establishes the point in the freguency spectrum where the subwoofer level control will have the greatest effect SUBWOOFER LEVEL CONTROL Although the AVA1204 does not have an overall level control you set volume level for your system from the head unit it features an independent level control for the subwoofer channel This gives you the ability to balance the amount of bass in the audio mix to your personal taste BOOST CUT CONTROLS Each o
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