Sound Storm Laboratories D500.4, D1000.2 Built-inCrossovers, Protection Circuitry, Ohm Operation

Built-in Crossovers

All D-SERIES amplifiers feature built-in electronic crossovers.

The 2 Channel amplifiers(D400.2/D650.2/D1000.2) feature an adjustable low pass and high pass cross -overs and +12dB variable Bass Boost.

The 4 Channel amplifiers(D350.4/D500.4) feature a pair of individually adjustable low pass crossovers and high pass crossovers, as well as and +12dB variable Bass Boost.

All D-SERIES amplifiers have been designed with 100% MOSFET power supplies, ensuring extremely quick switching response and self-protection.

Protection Circuitry

The amplifier protection circuitry will disable the amplifier if input overload ,short circuit or extremely high temperature conditions are detected. When the protection mode is in operation, the LED indicator on the front panel will be illuminated, indicating the amplifier has gone into a self-preservation mode.

If you observe that the protection LED is lit, please check the system carefully to determine what has caused the protection circuit to engage. The amplifier can be reset by turning the remote power off and then on again. If the amplifier shut down because of an input overload or short circuit, be sure to repair these conditions before attempting to power up the amplifier again.

2 Ohm Operation

Your D-SERIES amplifier was designed to operate efficiently at loads down to 2 Ohms.

This means that you can install four 8 Ohm speakers per channel when using parallel wiring. Increasing the number of woofers per channel at low frequencies (up to 100MHz) produces an acoustic coupling effect. This acoustic coupling increases your power output by 3 dB per speaker, or the equivalent of an additional 10W to each speaker.

When operating at 2 Ohms, the amplifiers will increase their output power by approximately 50%. The current draw will so increase by about the same amount, also be sure you have enough current to run the amplifiers into a 2 Ohm load. If you lack adequate current, your music reproduction will be distorted.

Please note: The gain control of any car audio amplifier should not be mistaken for a volume control. It is a sophisticated device, designed to match the output level of your audio source unit to the input level of the amplifier . Do not adjust this input level to maximum unless your input level requires it. Ignoring these instructions will result in an input overload to the amplifier, and excessive audio distortion. It can also cause the protection circuit to engage.

5