Channel Power Amplifier, Crossover Frequency

Amplifier Owner’s Manual

SD500.4

4 CHANNEL POWER AMPLIFIER

FRONT AND REAR INPUTS

Connect preamp signal cables from headunit to these inputs. The front AND rear inputs must be used, if only the front input is used then the rear speaker outputs will have no output signal.

CROSSOVER FREQUENCY

Controls the crossover point for the speaker outputs.

BASS BOOST

Variable bass boost from 0 to +18dB @ 45Hz.

SENS

Used to reach maximum amplifier power with a wide variety of headunits.

CONFIG

FLAT: Crossovers are turned off

HPF: High pass crossover is on

LPF: Low pass crossover is on

INPUT

					FL	RL
									POWER
BASSBOOST		X OVER	FREQ	SENS FR		RR SENS		FREQ	X OVER	BASSBOOST
		X OVER							X OVER
0dB	18dB	LPF FLAT HPF	40Hz 400Hz	MIN	MAX	MIN	MAX	40Hz 400Hz HPF FLAT LPF		0dB 18dB

GROUND

+ 12V

FUSE

GROUND	REMOTE	+ 12V	25A	25A				RL
GROUND	REMOTE	+ 12V						RL

+12V

This must be connected to the fused positive terminal (+12V) of the car’s battery. The fuse must be located within 18 inches of the battery.

SPEAKER OUTPUTS

Used to connect the amplifier to speakers. SD500.4 minimum impedance is 4 ohm bridged or 2 ohm stereo. Use Right + and Left - to bridge the channels.

REMOTE

This must be connected to switched +12V, usually a trigger wire coming from the head unit or ignition.

GROUND

This must be connected to the negative terminal of the car’s battery or bolted to a clean, unpainted part of the chassis of the vehicle.

NOTE: Visible through the plexiglass cover, a single blue power LED is located in the lower corner of all SD amplifiers.

SD800.5, SD500.4, SD600.1, SD300.1 specifications

Phoenix Gold is renowned for its high-performance car audio amplifiers, and the SD series, including the SD300.1, SD600.1, SD500.4, and SD800.5, showcases the brand’s commitment to quality and innovation. Each model in the SD series is designed to meet diverse audio needs, ensuring exceptional sound output and reliability.

The SD300.1 is a compact yet powerful mono amplifier, delivering up to 300 watts RMS at 1 ohm. This model is ideal for powering a subwoofer, thanks to its efficient Class D design that provides high output with minimal power consumption. Equipped with low and high pass filters, the SD300.1 allows users to customize their sound, ensuring a tailored audio experience.

Next in line is the SD600.1, which offers even greater power, producing up to 600 watts RMS at 1 ohm. This amplifier is perfect for audiophiles looking for deep bass response. Its variable bass boost feature enhances low frequencies, while a sleek design allows for easy installation in a variety of vehicles. The SD600.1 boasts advanced thermal overload and short circuit protection, ensuring durability and longevity.

For those requiring multi-channel options, the SD500.4 is a versatile 4-channel amplifier delivering 125 watts RMS per channel at 4 ohms. This model is ideal for powering both speakers and subwoofers, making it a great option for a complete sound system. Additionally, the SD500.4 features high and low level inputs, expanding its compatibility with various audio sources.

Lastly, the SD800.5 combines the power of both mono and multi-channel amps. With 800 watts RMS, this 5-channel amplifier is capable of powering an entire sound system—subwoofers and speakers alike. The SD800.5's bridgeable channels allow for further flexibility, enabling users to tailor their audio setup to match their preferences. Its compact build and advanced cooling system make it suitable for space-constrained installations while preventing overheating during intense listening sessions.

All amplifiers in the Phoenix Gold SD series emphasize build quality, featuring heavy-duty heat sinks and gold-plated connectors for improved signal transfer. With their cutting-edge technologies and robust features, the SD300.1, SD600.1, SD500.4, and SD800.5 are standout choices for car audio enthusiasts seeking powerful sound enhancement in their vehicles.