JBL M552 User Manual

Technical Manual
JBL M552

JBL M552 Specifications

General

Channels	2
Maximum Input Level	+20 dBu
Maximum Output Level	+20 dBu
Input Impedance	20 kOhms
Output Impedance	100 Ohms
Frequency Response	20Hz to 20kHz
Signal-to-Noise Ratio	>90dB
Frequency Range	20Hz - 20kHz
Power Supply	50/60Hz
Weight	6 lbs (2.7 kg)

Summary

Specifications

Electrical Specifications

Details crossover frequencies, input/output impedance, noise, THD, and frequency response.

Physical Specifications

Covers enclosure dimensions and shipping weight for the unit.

Package Contents and Component View

Component Parts List

Component Exploded View

Circuit Board Layout

Circuit Schematics: Input Stages

CH1 and CH2 Input Stages

Schematic details for CH1 and CH2 balanced/unbalanced input stages.

Mono Input Stage

Schematic for the CH1 mono input stage.

Circuit Schematics: CH1 Frequency Controls

CH1 Low and Low-Mid Frequency Circuits

Schematic for CH1 low and low-mid frequency adjustment.

Circuit Schematics: CH1 Output and Mute

CH1 Mid/High Output Level and Mute

Schematic for CH1 mid/high output level control and mute function.

CH1 Low Output Level and Mute

Schematic for CH1 low output level control and mute function.

Circuit Schematics: CH2 Frequency Controls and Indicators

CH2 Low/Low-Mid Frequency Circuits

Schematic for CH2 low and low-mid frequency adjustment.

Channel Indicator LEDs

Schematic section for channel mono and range indicator LEDs.

Circuit Schematics: CH2 Output and Mute

CH2 Mid/High Output Level and Mute

Schematic for CH2 mid/high output level control and mute function.

CH2 Low Output Level and Mute

Schematic for CH2 low output level control and mute function.

Circuit Schematics: Final Stages

CH1/CH2 Input and Output Stages

Schematic for final input and output signal processing stages.