Radio Shack P L A 2 1 7 0 warranty A 4 3 7, H a m p P L a 4 3 7

f e a t u r e s a n d c o n t r o l s

4 c h a m p P L A 4 3 7 0

protection LED

P L A 4 3 7 0

ch 3/4 high level inputs

ch 3/4 low level inputs ch 3/4 input level control ch 3/4 crossover mode selector switch

ch 3/4 bass boost level control ch 3/4 low pass frequency control ch 3/4 high pass frequency control ch 3/4 remote bass boost

power LED

ch 1/2 high level inputs

14

ch 1/2 low level inputs ch 1/2 input level control

ch 1/2 crossover mode selector switch ch 1/2 bass boost level control

ch 1/2 low pass frequency control ch 1/2 high pass frequency control

power fuse

speaker connections

power terminals

	f e a t u r e s
	4
crossover mode selector	when used with normal, full range systems, set this switch to “FULL.” If
	you wish to use the internal crossover to power a driver of specific frequency
	range, use the “LOWPASS” or “HIGHPASS” settings.
input level control	use this control to match the outputs of your head unit to the amplifier.
	Starting with your head unit set at about the 2 o’clock position, increase
	the amp level control until distortion begins to occur, and reduce slightly
	from this point.
low pass frequency control	when the crossover selector switch is in “low pass” mode, this control sets
	the upper frequency limit for audio program sent to the speakers.
high pass frequency control	when the crossover selector switch is in “high pass” mode, this control
	sets the lower frequency limit for audio program sent to the speakers.
Remote Bass Boost	Plug in the Remote Bass Boost Control wire in here.
bass boost level control	this control permits adjustment of the bass level up to an increase of
	approximately 18 dB.
low level inputs	this amp features gold-plated RCA input jacks for high impedance input.
	Use these with car stereo output which uses RCA-type connector cables.
high level inputs	if your car stereo lacks RCA-type output jacks, you may connect speaker
	output leads to these input connectors.
power LED	this indicator is illuminated when power is applied.
protection LED	this indicator is illuminated when built-in protection circuitry is activated.
power fuse	the fuse protects the amplifier and your car’s electrical system from short
	circuit conditions.
power terminals	use these connectors to deliver power, ground and remote turn-on control
	to the amplifier.
speaker connections	these terminals are 14K gold plated to guarantee high conductivity and
	minimum signal loss.

a n d s p e c i f i c a t i o n s

c h a m p P L A 4 3 7 0	P L A 4 3 7 0
	4 channel amplifier
output power @ 14.4v DC, 1KHz
RMS Power @ 4 Ohms	100 Watts x 4
RMS Power @ 2 Ohms	150 Watts x 4
Maximum Power Output	500 Watts x 4
frequency response	15 Hz-30 KHz
input impedance
low level inputs	10K Ohms	15
high level inputs	100 Ohms
input sensitivity
low level inputs	250mV
high level inputs	2.5V
power supply voltage	14.4V DC Neg. Ground (10.5-16V)
matching speaker impedance
stereo mode	2-4 Ohms
bridged mode	4-8 Ohms
maximum current draw	50A

dimensions (W x H x L)

mm292 x 60 x 483

inches 11.5 x 2.34 x 19