ACOUSTIC SYSTEMS

JBL 4638

Introduction
Features
Specifications

Introduction

JBL 4638 Low Frequency System. The JBL 4638 low frequency system is designed for cinema use and general reinforcement where smooth power response and accurate reproduction are essential. The 4638 employs the latest in JBL low frequency transducer technology, offering exceptional performance benefits

Features

Specifications

Introduction
Features
Specifications

Features

Usable Response to 30 Hz
100 dB Sensitivity, lW, 1 m
800 Watts Power Capacity
1600 Watts Continuous Program
Two 380 mm (15 in) Low Frequency Transducers with Exceptional Performance
Direct Radiator Ported Enclosure

Introduction

Specifications

Introduction
Features
Specifications

SPECIFICATIONS

Rated impedance	4 ohms
Minimum impedance	3.5 ohms
Axial sensitivity	100 dB @ lW, 1 m
AES	800 watts
Long Term Average per EIA RS-426A	1000 watts

Continuous Program	1600 watts
Half-space reference efficiency	8%
Maximum acoustical power output	64 watts
Power compression	at -10 dB power (80 W): 0.6 dB at -3 dB power (400 W): 1.9 dB at rated power (800 W): 3.2 dB
Net system weight	62.2 kg (137 lb.