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© 2000 Directed Electronics, Inc.     

1.

RCA INPUT JACKS

- accepts line-

level outputs from head units or
signal sources at voltages from
200mV to 8 volts. 

2.

GAIN ADJUSTMENT

- controls the

gain (input sensitivity) of the
amplifier. Each control sets the gain
for that half of the amplifier. 

3.

CROSSOVER SELECTION SWITCH

-

controls the type of filter for each
of two on-board active crossovers.
Set crossover switches for proper
filter type depending on system
configuration. 

4.

REMOTE SUB LEVEL 

- controls the

subwoofer output level 

5.

SUBWOOFER LOW-PASS
CROSSOVER

- use the gain and

crossover frequency controls to
adjust the subwoofer output. 

6. BASS EQ

- This switch activates an

8dB bass boost circuit. Use as
necessary for low frequency
enhancement.

7.

CROSSOVER FREQUENCY

- controls

the frequency range of the ampli-
fier.  Each half of the amplifier can
be set independently for optimum
performance. 

8.

LED INDICATOR 

- the green Power

LED lights to indicate normal opera-
tion.  The green LED will shut off to
indicate amp shutdown due to
thermal, short circuit, DC offset, or
over-current conditions detected by
on-board protection circuits. 

AMPLIFIER CONTROLS

Refer to Figure 2 for details.

FIGURE 2—AMPLIFIER CONTROLS

Summary of Contents for Model 350 Power Amplifier

Page 1: ...OWNER S MANUAL Model 350 ...

Page 2: ... priced for anyone s budget Featuring high effi ciency MOSFET power supplies flexible on board crossovers and state of the art audio design Directed Audio amplifiers will satisfy every music lover s needs for years to come Your Directed Audio power amplifier comes with a two year limited warranty if it is installed by an authorized DEI dealer Amplifiers not installed by an authorized Directed deal...

Page 3: ...also impair a driver s ability to hear traffic sounds or emergency vehi cles Use common sense and practice safe listening habits when listening to or adjusting your audio system WARNING Installation Guidelines Page 2 Amplifier Connections Page 4 Amplifier Controls Page 5 Speaker Wiring Diagrams Page 6 Crossover Setting and Gain Adjustment Page 7 Specification Page 8 Warranty Page 9 ...

Page 4: ...on at the battery within 8 10 inches of the battery terminal Use a fuse or circuit breaker rated at about 5 10 more amps than the on board fuse s of the amplifier s The gauge of power wire used should take into account the total current draw of the system and the length of wire used IASCA and other autosound competition organiza tions have charts available for this you can also find a chart in the...

Page 5: ...ring terminals of the appropriate size surface area is what counts soldering the terminals after crimping is also recommended 10 Due to the high frequency MOSFET switching power supply used in all Directed Audio amplifiers filtering the power cable is not generally required remember that the amp can t deliver full output if the power supply is restricted Proper grounding of the signal source is ma...

Page 6: ... that do not have separate amp remote outputs Do not connect this terminal to a constant source of 12V 3 12V POWER TERMINAL connect this terminal to the positive terminal of the car or separate audio system battery Refer to the installation guidelines and specs page for proper gauge of wire YOU MUST PROTECT THIS WIRE WITH A FUSE or circuit breaker located close to the battery 4 POWER FUSES protect...

Page 7: ...ubwoofer output level 5 SUBWOOFER LOW PASS CROSSOVER use the gain and crossover frequency controls to adjust the subwoofer output 6 BASS EQ This switch activates an 8dB bass boost circuit Use as necessary for low frequency enhancement 7 CROSSOVER FREQUENCY controls the frequency range of the ampli fier Each half of the amplifier can be set independently for optimum performance 8 LED INDICATOR the ...

Page 8: ...DIAGRAMS For bridged three channel operation as shown in this diagram connect right channel RCAcables to the FRONT inputs of the amplifier and left channel RCA cables to the REAR inputs of the amplifier Five channel operation Three channel operation ...

Page 9: ...cations start by playing some music you are familiar with With the gain adjustments on the amplifier in the middle of their rotation bring up the volume on your head unit to the 3 4 volume setting or until you start to hear distortion or clipping If you hear distortion before you reach the 3 4 volume setting of your head unit reduce the gain settings on the amplifier and start to raise the head un...

Page 10: ...l Harmonic Distortion 14 4 VDC Channel 5 driven into 2 ohms from 20 250 Hz with less than 0 1 THD 14 4 VDC Dynamic power rating IHF 202 Standard at minimum load 35 100 watts watts 50 150 watts watts ch 1 4 ch 5 450 watts 100x2 150 watts watts Signal to Noise Ratio Greater than 95 dB Frequency Response 20 20 000 Hz 0 5 dB Damping Factor 4 ohm Greater than 200 Crossover Switchable high or low pass 1...

Page 11: ... neglect improper service or other causes not arising out of defects in materials or construction ALL WARRANTIES INCLUDING BUT NOT LIMITED TO EXPRESS WARRANTY IMPLIED WARRANTY WARRANTY OF MERCHANTABILITY FITNESS FOR PARTIC ULAR PURPOSE AND WARRANTY OF NON INFRINGEMENT OF INTELLECTUAL PROPERTY ARE EXPRESSLY EXCLUDED TO THE MAXIMUM EXTENT ALLOWED BY LAW AND DEI NEITHER ASSUMES NOR AUTHORIZES ANY PER...

Page 12: ...L AMPLIFIERS SIGNAL PROCESSORS SINGLE AND DUAL VOICE COIL DIE CAST SUBWOOFERS HIGH PERFORMANCE POWER CABLES PREMIUM SPEAKER AUDIO CABLES AND ADAPTERS POWER CAPACITORS GOLD PLATED POWER DISTRIBUTION AND FUSING BLOCKS GOLD PLATED POWER AND SPEAKER TERMINALS TUBE SUBWOOFERS POWERED SUBWOOFERS SINGLE AND DUAL VOICE COIL SUBWOOFERS COAXIAL SPEAKERS SINGLE AND DUAL VOICE COIL DIE CAST SUBWOOFERS COMPONE...

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