JBL 6010B Schematic

Page 1

The JBL 60108 is a highly reliable, conservatively rated
amplifier, designed for professional sound engineering
applications where a high degree of performance is
required.

The circuitry has been carefully designed to reduce the
possibility of failure within the specified environmental
and electrical conditions. A protective circuit is utilized
in this amplifier which makes it virtually impossible to
damage it under any conditions of overload, including
shorted or grossly mismatched load, inductive load at low
frequencies, capacitive load at high frequencies, excessive
input signal, white noise or installation errors.

The JBL 60103 can be overdriven by at least ten times
normal input voltage, from 40-12 kHz, and eventually
produces square waves increasing in RMS value up to
about 160W at which point the output actually begins
to decrease.

The DC fuse is intended as a protective device for the
power supply in the event of output stage malfunction.
It is not intended to protect the output transistors which
are guarded by the special circuitry provided. As an
indication of high frequency stability, the JBL 601GB

draws only 30% more power from the AC line at 12 kHz,
100W, than at 1 kHz for at least one hour without mal-
function or entering the "protect" mode.

In the event of fan failure, the thermal switch will acti-
vate if the heat sink temperature exceeds 200° F. The
hum and noise level is extremely low-at least 85 dB
below maximum output.

The 60108 amplifier is designed for maximum flexibility
in varying input and output arrangements. A standard
unbalanced 50K input is provided which can be converted
to balanced line bridging or matching with the installation
of the accessory 5195 transformer. A low cut filter switch
reduces the possibility of damaging horns. All the power
outputs are balanced and the bridging output unbalanced.

{JB

Page 2

Model 6010 B - Power Amplifier

Architectural Specifications

The amplifier shall be capable of delivering an output of
100W RMS with less than 1.0% THVD, 4042,000 Hz, and
150W RMS from 50 to 8000 Hz with less than 4% THD.

The high impedance program input shall be provided with
a socket to accommodate a balanced line with isolation.
Matching and bridging inputs shall be available. Screw
type terminal board shall be provided for the balanced
line inputs as well as for the high impedance unbalanced
input. In addition, a phono plug shall be provided for

the high impedance input. A low frequency filter switch
shall be provided.

The amplifier shall have balanced B-ohm, lG-ohm and
70.7-volt outputs on a screw type terminal board listed
by Underwriters Laboratories, Inc. for class 2 wiring.

The amplifier shall be equipped with a protective circuit
which will prevent damage due to overload. A power
output meter shall be standard equipment.

The amplifier shall operate on 120/240 VAC, 50/60 Hz
power source.

The performance specifications shall be as listed under
SPECIFICATIONS and shall be met or exceeded.

The amplifier shall be listed by the Underwriters'
Laboratories, Inc.

The amplifier shall be JBL Model 60103.

H B L Professional Series
Professional Division

James E. Lansing Sound. Inc., 8500 Balboa Boulevard, Norlhridge, California 91329,

PPBMH OBIS-77