Diamond D3 400.2, D3 600.1, D3 1100.1, D3 500.4 manual

&RCA Input and Pass-Thru Output - These RCA jacks allow for a normal Left and Right channel signal input. Simply connect to the source unit using RCA type audio cables, keeping them away from power wiring wherever possible. On the 4 channel ampliﬁers (D3 500.4) “Front” and “Rear” input jacks are present as well as a “Pass-Thru” output allows the signal to pass on to other ampliﬁers. The Pass-Thru output is unaffected by the onboard crossover.

'Input Gain Adjustment - This control matches the preamp stage of the DAT ampliﬁer to your source unit. This is NOT a volume control. The range is between 150mV and 4V.

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Crossover Adjustment- Use this adjustment to select the crossover point. Remember that your choice will be directed to High Pass or Low Pass depending upon the position of the adjacent switch. The range of adjustment is limited between 30-500 Hz (D3 400.2), 40-400 Hz (D3 500.4) and 30-250Hz(D3 600.1) , 50-250Hz (D3 1100.1)

Crossover Selection Switch - This switch allows you to select the crossover. Use High Pass for midrange or high frequency speakers. Use Low Pass for subwoofers. In the OFF position, the crossover adjustment knob has no effect. The D3 600.1 and the D3 1100.1 are only available as Low Pass.

*Sub-Sonic Adjustment - This control allows you to adjust the "pass-band" for a true 3 way speaker system. This helps solve "standing wave" problems in-car (boomy bass), AND protects midrange/mid-bass drivers at the same time. The D3 400.2 is 10 - 100 Hz, D3 600.1 is 15-75Hz and the D3 1100.1 has an adjustment from 15-40Hz

+Phase Adjustment (D3 600.1/D3 1100.1 Only) - This control allows you to adjust the "phase" so as to align the subwoofer in "time" to the mids and tweeters. 0 to 180 degrees of adjustment capability. This is EXTREMLY useful to get the best and MOST bass out of your system.

,Bass Boost - This control adds 0 to +12dB of boost at 50Hz. Be cautious when adding boost to some subwoofer systems as they may not be able to handle the additional low frequency boost. In the OFF position, no bass boost is added.

-Remote Level Adjustment (D3 600.1/D3 1100.1 Only) - This port is for the remote level control (included). The control is intended to allow the user to control the level of gain up to the maximum adjustment level set on the ampliﬁer. The control does not add additional boost, it only attenuates the setting that is ﬁxed at the ampliﬁer’s control panel.

Status LED’s - These lights indicate when the ampliﬁer is powered up normally and when there is a protection fault. See the “Troubleshooting” section for details on what these useful indicators can tell you if there’s a problem.

Power Input Connections - These connections are for input power, chassis ground, and remote turn-on. Use a minimum of 4 gauge wiring for power and ground connections. The terminals will handle up to 4 gauge wiring with no problem whatsoever. Be sure any wiring that passes through metal has a grommet!

&&Power Fuses - Standard automotive type ATC/ATO fuses are used on DAT D3 Series Ampliﬁers. Always replace with the correct fuse size. Never insert fuses of higher values. Doing so will void the warranty of your DAT ampliﬁer. Also include a main fuse at the connection to the vehicle battery within 18 inches (45.7 mm) of the positive battery post. It is also important to upgrade the connection between the negative battery post and the chassis of the vehicle. This greatly reduces possibilities of weak electrical “links” in the circuit.

&'	Speaker Output Terminals - Connect your speakers to these terminals. Stereo connections are connected as labeled. Bridged
&'	connections use the LEFT + and RIGHT - as the two connections. The 2 and 4 channel ampliﬁers will perform into 2 Ohm stereo loads
	or 4 Ohm bridged loads. DO NOT run 2 Ohm bridged loads on these ampliﬁers! The D3 600.1 and the D3 1100.1 are the only ampliﬁer's
	in the D3 Series capable of less than a 2 Ohm load (D3 600.1/D3 1100.1 are capable of driving a load as low as 1 Ohm.)

D3 500.4, D3 1100.1, D3 400.2, D3 600.1 specifications

The Diamond D3 series amplifiers, particularly the D3 1100.1, D3 500.4, D3 400.2, and D3 600.1, have become popular choices among audio enthusiasts seeking superior sound quality and performance. These amplifiers excel in powering a range of audio systems, from home theaters to car audio setups.

The Diamond D3 1100.1 is a mono subwoofer amplifier that delivers an impressive 1100 watts of RMS power. This amplifier features a robust Class D design, which offers high efficiency and reduced heat generation. Its low-frequency performance is enhanced by features like a variable low-pass filter and a bass boost option, allowing users to tailor the output to their subwoofer’s specifications. Additionally, the D3 1100.1 includes a durable aluminum chassis that ensures longevity and reliability under demanding conditions.

Next in the lineup, the D3 500.4 is a 4-channel amplifier that is perfect for driving full-range speakers and subwoofers simultaneously. With a power rating of 500 watts RMS, this amplifier is versatile and can be configured in various ways to suit different audio setups. It features high and low-level inputs, a built-in crossover, and a signal-to-noise ratio that ensures clear, undistorted sound. Its compact size makes it suitable for installations with limited space, while its robust construction provides durability.

The D3 400.2, a 2-channel amplifier, is designed to deliver clean and powerful audio to speakers. With an output of 400 watts RMS, it supports a range of applications from powering front speakers in a car audio system to driving small home theater speakers. The amplifier boasts a compact form factor along with advanced protection circuitry that prevents overheating and overcurrents, ensuring stable operation.

Finally, the D3 600.1 is another mono amplifier particularly aimed at subwoofers. With a power capability of 600 watts RMS, it combines power with advanced features such as a variable low-pass filter and a bass boost option to enhance low-frequency output. Its thermal and short-circuit protection ensures safe operation, making it an excellent choice for bass lovers.

All models in the Diamond D3 series feature high-quality connectors, low-level RCA inputs, and a smart design that enhances ease of installation. With these amplifiers, users can expect clear, dynamic sound that enhances any audio experience. The combination of advanced technologies and thoughtful design makes the Diamond D3 series a standout choice for both casual listeners and serious audiophiles alike.