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© 2002 Directed Electronics, Inc 

High-powered car audio
systems may produce

sound pressure levels that exceed the
threshold at which hearing loss may
result. 

They may 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

FEATURES

„

High-speed MOSFET switching
power supply and complimentary
bipolar outputs

„

Four-channel architecture supports
up to six channel use

„

Thermal, DC offset, reverse polarity
and short circuit protection

„

Top-mounted controls easily
accessed for system tuning

„

Dual continuously variable 12 dB/
octave two-way active crossovers

„

Dual switchable 8 dB bass EQ func-
tion 

„

Summed stereo full-range RCA
output jacks

„

Gold-plated wire terminals and RCA
connectors ensure maximum signal
transfer

„

Rugged one-piece extruded heat
sink finished with injection-molded
mounting feet

Summary of Contents for 4200

Page 1: ...models 4200 4500 ...

Page 2: ...2 2002 Directed Electronics Inc ...

Page 3: ...and delight the mobile sound enthusiast with years of high quality audio reproduction Directed Audio power amplifiers come with a two year limited warranty if installed by an authorized Directed dealer If not installed by an authorized dealer Directed Audio power amplifiers are covered by a one year parts and labor limited warranty Be sure to retain your original sales receipt and refer to the war...

Page 4: ... accident or unreasonable use 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 PARTICULAR PURPOSE AND WARRANTY OF NON INFRINGEMENT OF INTELLECTUAL PROPERTY ARE EXPRESSLY EXCLUDED TO THE MAXIMUM EXTENT ALLOWED BY LAW AND DIRECTED NEITH...

Page 5: ...ES High speed MOSFET switching power supply and complimentary bipolar outputs Four channel architecture supports up to six channel use Thermal DC offset reverse polarity and short circuit protection Top mounted controls easily accessed for system tuning Dual continuously variable 12 dB octave two way active crossovers Dual switchable 8 dB bass EQ func tion Summed stereo full range RCA output jacks...

Page 6: ...ur power connection within 8 to 10 inches of the battery terminal Use a fuse or circuit breaker rated slightly more 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 auto sound competition organizations have charts available for this you can also find a chart in the MECP...

Page 7: ...urface area is what counts soldering the terminals after crimping is also recom mended 10 Due to the high frequency MOSFET switching power supply 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 mandatory for the amplifier to reach its performance peak If the RCA inputs are...

Page 8: ...nstalling a fuse or circuit breaker of the appropriate size within 12 inches of the battery terminal connection REAR PANEL CONNECTIONS 1 R RC CA A IIn np pu ut t J Ja ac ck ks s Accepts line level outputs from head units or signal processors at voltages between 150mV and 8 volts 2 R RC CA A O Ou ut tp pu ut t J Ja ac ck ks s These pass through RCA jacks can be used to send a signal to a second amp...

Page 9: ...is not avail able a Remote Power Adapter P N 55000 can be used to supply a remote turn on signal DO NOT connect this terminal to constant 12 volt 5 G Gr ro ou un nd d Connect this terminal directly to the sheet metal chassis of the vehicle using the shortest wire necessary to make this connection Always use wire of the same gauge or larger than the 12 volt power wire The chassis connection point s...

Page 10: ...ker systems HPF attenuates low frequencies and is used for mid range speakers and tweeters LPF attenuates high frequencies and is typically used for subwoofers 3 C Cr ro os ss so ov ve er r F Fr re eq qu ue en nc cy y A Ad djju us st tm me en nt t Adjusts the crossover point for the on board active crossovers 4 B Ba as ss s E EQ Q S Sw wiit tc ch h Adds an additional 8 db of boost to the speaker o...

Page 11: ...as shown in this diagram connect right channel RCA cables to the front inputs of the amplifier and left channel RCA cables to the rear inputs of the amplifier For summed subwoofer applications connect RCA cables per the input jack marking Stereo Operation top view Two Channel Stereo Four Channel Stereo Simultaneous Two Channel Stereo with Mono Sub ...

Page 12: ... proper signal match for clean quiet ampli fier operation For full range and simultaneous stereo mono bass applications start by playing some music you are familiar with With the gain adjustment on the amplifier in the middle of its 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 ...

Page 13: ...4 VDC Dynamic power rating IHF 202 Standard bridged into 4 ohms Directed model 4200 4500 35 75 watts watts 50 20 125 watts watts 100x2 250x2 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 100 Crossover Switchable high or low pass 12 dB octave continuously variable from 50 to 500Hz Bass Equalization 8 dB centered at 40Hz...

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Page 16: ...ield of advanced electronic technology Directed is ISO 9001 registered Directed is committed to delivering world class quality products and services that excite and delight our customers Directed Electronics Inc Vista California 92083 www directed com Directed is a proud member of Quality Directed products are sold and serviced throughout North America and around the world Call 800 274 0200 for mo...

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