Pyramid Car Audio PB1644 ユーザーズマニュアル

general features

2

features and speifications

1

3- 4

24

5- 6

7- 8

electrical connections

9

stereo input connections

13

mono input  connections

2/4 channel  input  connections

4CH amp PB844 PB1644 

10

speaker  connections

17-18

4CH amp PB844

mounting and installation

23

protection circuitry and troubleshooting

precautions

If this occurs ,carefully inspect the system to 
determine the source of the problem.

When the protection circuit is activated by any 
of these conditions, the Protection LED will be 
illuminated.

If the shutdown was a result of a thermal overload 
condition, allow the amplifier to cool down before 
attempting to restart it.

If the shutdown was a result of an input overload, 
or speaker short circuit, be sure to corr the 
condition before restarting.

The amplifier can be restarted by turning the 
remote power OFF and then ON again.

Check both in-line and built-in fuses. Both the +12V and the Remote terminals 
must have +12V referenced to chassis ground.

Confirm that all terminal strip connections are secure and tight.

Confirm that the audio signal source(car radio, equalizer, etc.) Is connected 
and is supplying output signal. To check if the amp is supplying signal, unplug 
the cables from the signal source(but leave them plugged into the amp). 
Briefly tap the center pin of each of the disconnected RCA plugs with your finger. 
This should produce a noise)feedback) in your speakers.

Only one channel works.
Confirm that all terminal strip connections are secure and tight.

If the above steps fail to improve or clear noise interference, the system 
should be checked by a professional mobile audio installer.

If you are using the Low Level RCA input , reverse the input plugs at the 
amplifier(i.e.,switch the L with the R). If the channels which is silent switches 
to the other side, the problem is either in the head unit/other source or the 
connecting cables.

If the noise is a “clicking” or “popping” noise whose rate follows the engine 
speed, this usually means that the vehicle is equipped with resistor spark 
plugs and wires, or that the ignition is in need of service.

Readjust the Input Level Control(s) to better suit the input signal.

If the noise is a “whine” whose pitch follows the engine speed, confirm that 
the amplifier and any other signal sources(hesd unit, etc.) Are properly ground.

Check the Balance control on the head unit(or other source) to verify that it 
is set to its midpoint.

Check the routing of the speaker and input wires to make sure they are not 
adjacent to wire which interconnect lights and other accessories.

mono input  connections

4CH amp PB844 PB1644

4CH amp PB844

19-20

1

22

11

12

14

15

16

21

22

The built-in protection circuitry in the Pyramid 
Signature amplifiers will disable the amplifier if it 
senses an input overload, a speaker short 
circuit, or extreme temperature conditions.

Confirm that all terminal strip connections are secure and tight.