Directed Audio 750d 1500d Combining Amplifiers, Parallel Synced Gain, External Synced Bridged

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COMBINING AMPLIFIERS

The Viper 750d/1500d subwoofer amplifiers have the capability of connecting two or more amplifiers of the same power rating together in a master/slave combination for increased power with accurate level matching. They are the Parallel Synced Gain and External Synced Bridged combinations.

WARNING: DO NOT attempt to combine amplifiers of different power ratings. These amplifier combinations work correctly only if the Master and Slave amplifiers are identical models.

Parallel Synced Gain

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

This 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. Wiring connections to the amplifier subwoofer outputs in this combination should be standard in-phase configurations, creating a parallel speaker connection. (Refer to Parallel Synced Gain section of this guide for amplifier and speaker connection diagrams.)

NOTE:

One master amplifier can control up to three slave

amplifiers in this combination. Multiple identical master/slave combinations can be added to any given system.

External Synced Bridged

In this master/slave combination the master amplifier pre-amp controls remain active and the slave amplifier 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 subwoofer wiring configuration the master amplifier sends the positive signal to the subwoofer while the slave amplifier sends the negative signal, making an externally bridged speaker connection. (Refer to External Synced Bridged section of this guide for amplifier and speaker connection diagrams.)

NOTE:

Amplifiers in this combination can only be connected

 

in matched pairs. Multiple matched pairs may be

 

added to drive separate subwoofer loads in a given

 

system.

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. Adjustment guidelines are discussed in the Crossover and Gain Adjustment section of this guide.

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© 2003 Directed Electronics, Inc

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Contents 750d models 1500d Table of Contents CongratulationsLimited TWO-YEAR Consumer Warranty Features „ High-speed Mosfet switching power supplyInstallation Guidelines Directed Electronics, Inc Front Panel Connections RCA Sync Out/ Slave In JackRear Panel Connections Amplifier Connections 750d Rear TOP Panel Features Remove/InstallTOP Panel Controls Control Panel CoverSpeaker Wiring Diagrams Combined Amplifiers Gain and Filter Settings Combining AmplifiersParallel Synced Gain External Synced BridgedParallel Synced Gain CONNECTIONS/SETTINGS Slave/Master SwitchSubwoofer Wiring top view MasterSlave External Synced Bridged CONNECTIONS/SETTINGS Subwoofer Wiring SlaveMultiple Amplifier Combinations Crossover Settings and Gain Adjustment Specifications Directed model 750d 1500dDirected Electronics, Inc Vista, California

750d 1500d specifications

Directed Audio has made significant advancements in the automotive audio industry with its groundbreaking products, the 750D and 1500D. Designed for enthusiasts who demand high-quality sound from their vehicles, these amplifiers are engineered to deliver superior audio performance and robust power.

The Directed Audio 750D is a compact yet powerful Class D amplifier that provides 750 watts of RMS power at a 1-ohm load. This unit is designed specifically for those who want to enhance their in-car audio experience without compromising on performance or efficiency. The 750D features a high-speed MOSFET power supply, ensuring effective power management and consistent performance over prolonged usage. Its compact size allows for easy installation in a variety of vehicle types, making it a versatile choice for audio upgrades.

On the other hand, the Directed Audio 1500D takes performance to the next level with an impressive 1500 watts of RMS power at a 1-ohm load. This amplifier is built for serious audio aficionados who want to push the limits of their in-car sound systems. Like the 750D, the 1500D utilizes a high-efficiency Class D design, providing maximum power output while minimizing energy loss. This design also helps to keep the amplifier cool, even during extended listening sessions.

Both models come equipped with adjustable low-pass filters that enable users to tailor the sound to their preferences, allowing for precise control over the audio output. Additionally, they feature built-in bass boost functionalities, providing an enhanced low-end response that is essential for modern music genres heavily reliant on bass frequencies.

Installation of the Directed Audio amplifiers is made easy with user-friendly connectivity options. They include high-level inputs, enabling simple integration with factory sound systems without requiring extensive modifications. Furthermore, these amplifiers are housed in sturdy, compact chassis designs that are both appealing and durable, ensuring longevity in various environmental conditions.

In summary, the Directed Audio 750D and 1500D amplifiers exemplify the brand's commitment to delivering high-performance audio solutions for car enthusiasts. With advanced features, exceptional power output, and user-friendly installation options, these amplifiers stand out in the automotive audio market as top choices for those seeking to elevate their listening experience on the road.
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