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© 2003 Directed Electronics, Inc 

The Directed 1200/5 channel five
subwoofer section can be combined with
a 750d in a master/slave combination
for increased power and accurate level
matching. They are the Parallel Synced
Gain and External Synced Bridged combi-
nations. 

NOTE:

The Directed 1200/5 is always the master amplifier
in these combinations.

Parallel Synced Gain

The Parallel Synced Gain combination
includes a master amplifier and a slave
amplifier.

In this master/slave combination the
master amplifier’s pre-amp controls
remain active and the slave amplifier’s
pre-amp is bypassed. This allows the
master amplifier to control gain, filter,
and sub-level on both amplifiers.

The Parallel Synced Gain combination
allows the amplifiers to drive their own
separate subwoofer(s) while being
synced together via an in-phase audio
pre-amp signal from the master amplifier.

Woofer wiring connections to the ampli-
fier subwoofer outputs in this combina-
tion should be standard in-phase configu-
rations, creating a parallel speaker
combination. (Refer to 

Parallel Synced

Gain section of this guide for amplifier
and speaker connection diagrams.)

External Synced Bridged

The External Synced Bridged combination
includes a master amplifier and a slave
amplifier.

In this master/slave combination the
master amplifier’s pre-amp controls
remain active and the slave amplifier’s
pre-amp is bypassed. This allows the
master amplifier to control gain, filter,
and sub-level on both amplifiers.

This combination allows the amplifiers to
drive common subwoofer loads while
being synced together via an out-of-
phase audio pre-amp signal from the
master amplifier. In this wiring configura-
tion the master amplifier sends the posi-
tive signal to the speaker while the slave
amplifier sends the negative signal,
making an externally bridged speaker
combination. (Refer to 

External Synced

Bridged section  of this guide for ampli-
fier and speaker connection diagrams.)

Combined Amplifiers Gain
and Filter Settings

Set the Subsonic, EQ, and other filter
settings on the master amplifier to the
positions that achieve the best sound
quality. Follow the adjustment guidelines
discussed in the 

Crossover and Gain

Adjustment section of this guide.

COMBINED AMPLIFIERS

Summary of Contents for 1200/5

Page 1: ...model 1200 5 ...

Page 2: ...2 2003 Directed Electronics Inc ...

Page 3: ...rected 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 warranty section of this guide for full details about your coverage Limited Two Year Consum...

Page 4: ...ct 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 NEITHER ASSUMES NOR AUTHORIZES ANY PERSO...

Page 5: ...offset reverse polarity and short circuit protection with status LED Top mounted controls are easily accessed for system tuning Dual continuously variable 12 dB octave two way active crossovers ch 1 4 Continuously variable 24 dB octave low pass crossover sub channel Switchable 30Hz 24 dB octave subsonic filter and phase invert switch sub channel Remote subwoofer level control and switchable 8 dB b...

Page 6: ...your power connection within eight to ten 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 t...

Page 7: ...te size surface 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 i...

Page 8: ...t sends an out of phase signal to a 750d slave amplifier when connected in the External Synced Bridged combination Refer to the Combined Amplifiers section of this guide 6 S St ta at tu us s L LE ED Ds s The Power LED will light GREEN to indicate the amplifier is on and operating normally The GREEN LED will turn off and the Protection LED will light RED when the amplifier has shut itself down due ...

Page 9: ...battery W WA AR RN NIIN NG G Always protect this power wire by installing a fuse or circuit breaker of the appropriate size within 12 inches of the battery terminal connection 5 R Re em mo ot te e T Tu ur rn n O On n This terminal turns on the amplifier when 12 volt is applied to it Connect it to the remote turn on lead of the head unit or signal source If a 12 volt remote turn on lead is not avai...

Page 10: ...bwoofer speaker output by 180 degrees 5 B Ba as ss s E EQ Q S Sw wiit tc ch h Adds 8db of addi tional boost to the subwoofer output when active 6 S Su ub bs so on niic c F Fr re eq qu ue en nc cy y S Sw wiit tc ch h Sets the cutoff point for subsonic frequencies at 30 Hz Frequencies below will be attenuated by 24db per octave 7 S Su ub b IIn np pu ut t S Sw wiit tc ch h Controls where the subwoofe...

Page 11: ... AMPLIFIER CONTROLS 1200 5 TOP 2 1 6 3 5 7 8 4 Control Panel Cover The gain and filter controls are located under a control panel cover on top of the amplifier The control panel cover must be removed to gain access to the gain and filter controls Remove Install Four Allen head screws hold the control panel cover to the amplifier top panel one at each corner They can be removed with the wrench supp...

Page 12: ...SPEAKER WIRING DIAGRAMS 12 2003 Directed Electronics Inc Five channel operation top view Three channel operation top view ...

Page 13: ...lel speaker combination Refer to Parallel Synced Gain section of this guide for amplifier and speaker connection diagrams External Synced Bridged The External Synced Bridged combination includes a master amplifier and a slave amplifier In this master slave combination the master amplifier s pre amp controls remain active and the slave amplifier s pre amp is bypassed This allows the master amplifie...

Page 14: ...ect an RCA cable between the SYNC OUT RCA jack of the 1200 5 and the SLAVE IN RCA jack of the slaved 750d as shown in Figure 5 4 S Slla av ve e M Ma as st te er r S Sw wiit tc ch h Set the slave master switch of the 750d to the slave position This will put the I O RCA jack in the SLAVE IN mode so it will accept the audio signal from the 1200 5 s sync out RCA jack 5 S Su ub bw wo oo of fe er r S Sp...

Page 15: ... OUT SYNC OUT BRIDGE OUT R L SLAVE MASTER REMOTE POWER PROTECTION 1 Do Not Use 4 Do Not Use 2 Do Not Use Master 1200 5 Slave 750d 3 MASTER 1200 5 SUBWOOFER SUB SLAVE 750D 5 Speaker Wiring top view N NO OT TE E The dual and sub out terminals of the 750d are paralleled internally and the combined load impedance should be taken into consideration when connecting multiple subwoofers ...

Page 16: ...y The 1200 5 control panel subwoofer adjustments are used first to set the overall gain for all synced amplifiers then the Remote Sub Level control can adjust the gain of all synced ampli fiers by adjusting its control knob 3 S Siig gn na all C Co on nn ne ec ct tiio on n Connect an RCA cable between the BRIDGE OUT jack of the 1200 5 and the SLAVE IN jack of the slaved 750d as shown in Figure 6 4 ...

Page 17: ...erminals of the 750d are paralleled internally and the combined load impedance should be taken into consideration when connecting multiple subwoofers INPUT I O R L SLAVE MASTER REMOTE SLAVE IN SYNC OUT BRIDGE OUT SUB LEVEL MIN MAX 1 2 3 4 SUB 1 4 OUT SUB OUT SYNC OUT BRIDGE OUT R L SLAVE MASTER REMOTE POWER PROTECTION 1 Do Not Use 4 Do Not Use 2 Do Not Use Master 1200 5 Slave 750d 3 ...

Page 18: ...nt 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 3 4 volume setting of your head unit reduce the gain setting on the amplifier and start to raise the head unit volume again When you can listen to the music at or slightly above 3 4 on your he...

Page 19: ...nel driven into 1 ohm from 20 250 Hz with less than 0 6 THD 14 4 VDC Dynamic power rating IHF 202 Standard at minimum load Directed model 1200 5 Ch 1 4 Sub Ch 75 275 watts watts 125 400 watts watts 250x2 600 watts watts Signal to Noise Ratio Greater than 95 dB Ch 1 4 80dB sub Frequency Response 20 20 000 Hz 0 5 dB Ch 1 4 Damping Factor 4 ohm Greater than 100 Ch 1 4 50 sub Crossover Ch 1 4 Switchab...

Page 20: ...d 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 92081 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 more information ...

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