PS475 Indicators and Controls, Testing

PS475

Indicators and Controls

Power Indicator

The power indicator provides a visual indication that the amplifier is turned on.

Level

The input level control matches the output of your radio to the input of the amplifier. After the installation is complete, make sure the input level control on the amplifier is turned down all the way (counterclockwise or all the way to the left). Play a tape or CD (make sure bass and treble settings or EQ are flat) and turn the volume up slowly until you just start to hear distortion. Back the volume down just a bit. On the amplifier, slowly turn up the input level control (clockwise or to the right) until you just start to hear distortion, and back it down a bit. Now the radio and amplifier levels are matched.

Bass Boost

The Bass Boost is continuously adjustable from 0 to +18dB @ 45Hz. Adjusting the Bass Boost level allows different subwoofer/enclosure combinations to be equalized. Use this control to increase the level of low bass available from your subwoofer/enclosure combination. Ported and Band Pass enclosures should be limited to about +6db to +9dB of boost. Sealed enclosures should be able to accept the full +18dB of boost, if necessary. The full +18dB of boost should be reserved for special applications because misuse of the Bass Boost could damage your subwoofers at high volumes.

Testing

Before finishing the installation, perform the following tests to make sure the wiring is correct and everything is operating properly.

Reconnect Battery

When wiring is complete, reconnect the battery negative terminal.

Test Power Wiring

Turn on the receiver, but do not turn up the volume. The amplifier power light should come on. If not, check the REM and +12V wires. Turn up the receiver volume slightly. All speakers should operate. If not, check wiring connections at amplifier and speakers.

Test Speaker Connections

These tests make sure the speakers are connected properly. If speakers don’t play at all, one (or both) speaker wires may be disconnected.

Crossover

The PS series amplifiers have built-in low-pass and high-pass crossover filters for bi-amplifying the system. Adjust the crossover to accommodate your chosen installation method. Select LPF (low pass filter) when the amplifier will be driving woofers or subwoofers. Choose FULL when crossover mode is not active and the amplifier is in “full range” mode. Select HPF (high pass filter) when the amplifier will be driving full range/separate speakers, and you want to limit the “bass” going to these speakers.

L-CHX / R-CHX

Indicators and Controls)

Indicadores y Controles

Indicateurs et Contrôles

Level

Nivel de entrada

NiveauR-CHX

	1.4		180
			180
4	.5	80	300

L-CHX

180

80300

These controls adjust the crossover point from 40Hz to 400Hz. Typical low-pass crossover is between 60Hz and 80Hz. Dual cone, two-way and three-way speakers will typically be smaller in size than sub-woofers, and the bass going to these speakers will need to be attenuated. Typical high pass crossover is between 100Hz to 240Hz. Since musical tastes vary, use the above settings as a starting point and adjust the crossover by ear while listening to the music of your choice. Be sure to set the head unit tone controls to flat before adjusting crossover.

Protect Indicator

The protect indicator provides a visual indication that a problem exists and the protection circuitry has protected the amplifier by shutting it down. Turn the system off and correct the problem before turning the system on.

Thermal Protection

The amplifier will shut down if its termperature exceeds a safe operating level. The amplifier will remain off until it cools to a safe operating temperature. Exercise care, as the exterior of the amplifier may get uncomfortably hot to the touch before shutting down.

Overload and Short Circuit Protection

The amplifier will shut down if a short circuit condition exists or if electical current demands exceed safe levels.

1.4		180			180			180		180			1.4
4	5	80	300 80		300	2	2	80	300 80		300	4	5
		Hz	Hz	Hz	Hz			Hz	Hz	Hz	Hz

	Power Indicator	Protect Indicator
2	Indicador de energía	Indicador de la protección
	Indicateur de puissance	Indicateur de la protection
Bass Boost		Crossover
Bajos		Cruce
Bas		Filtrage