Pyramid PB1281X User Manual

congratulations...
on your purchase of a Pyramid Crystal Series
amplifier. This amplifier extends the Pyramid
tradition into a totally new series of amps, designed
from the ground up to deliver the power,
performance and flexibility the modern car audio
enthusiast demands.
When you check the list of features offered by the
PB481X, PB681X, PB781X, PB881X, PB1281X,and
PB1881X, you’ll know you made the right choice
with a Pyramid Power amplifier.

Pyramid PB1281X Specifications

General

Channels	2
Frequency Response	15Hz - 30kHz
Impedance	4 Ohms
Signal to Noise Ratio	90dB
Input Sensitivity	200mV-6V
Crossover Type	Variable
Low-Pass Crossover Frequency	50Hz - 250Hz
Bass Boost	0-18dB

Summary

PB481X Features and Controls

PB481X Features and Specifications

Detailed specifications and features for the PB481X amplifier model.

PB781X Features and Controls

PB781X Features and Specifications

Detailed specifications and features for the PB781X amplifier model.

PB1281X Features and Controls

PB1281X Features and Specifications

Detailed specifications and features for the PB1281X amplifier model.

PB681X & PB881X Features and Controls

PB681X & PB881X Features and Specifications

Detailed specifications and features for PB681X and PB881X amplifiers.

PB1881X Features and Controls

PB1881X Features and Specifications

2-Channel Electrical Connections

4-Channel Electrical Connections

2-Channel Input Connection Methods

4-Channel Input Connections

2-Channel Speaker Connections

4-Channel Speaker Connections

2 CH Bridged Output Mode with Subwoofer

Mounting and Installation

Protection Circuitry and Troubleshooting

Troubleshooting Common Issues

Solutions for common problems like no output or weak output.