c-audio Pulse Specifications

T E C H N I C A L S P E C I F I C A T I O N S

Pulse Series

Power Ratings

Cooler, Lighter, Stronger

Pulse 4x300

Into 8 Ohms 170W
Into 4 Ohms 300W

Into 2 Ohms 330W

Pulse 2x650

Into 8 Ohms 400W
Into 4 Ohms 650W
Into 2 Ohms 850W

Pulse 2x1100

Into 8 Ohms 700W
Into 4 Ohms 1100W
Into 2 Ohms 1500W

The Pulse Series com­bines state-of-the-art
switched mode power
supplies to not only
reduce amplifier weight
by as much as 70%
compared to conventional
amps, but also to provide
solid, consistent
performance at all power
levels.

Technical Specifications

Power Ratings Pulse 4x300 Pulse 2x650 Pulse 2x1100

Measured per channel, both channels driven at 1kHz to no more than 0.1% THD+N

8 Ohms 170Wrms 400Wrms 700Wrms
4 Ohms 300Wrms 650Wrms 1100Wrms
2 Ohms 330Wrms* 850Wrms* 1500Wrms*

* Note: 2 Ohm spec is at 1% THD

Bridged Mono

16 Ohms 400Wrms 800Wrms 1200Wrms
8 Ohms 600Wrms 1300Wrms 2200Wrms
4 Ohms 660Wrms* 1700Wrms* 3000Wrms*

* Note: 4 Ohm bridged spec is at 1% THD

Input Sensitivity +1dBu for full output
Input Impedance 20kOhm

Benefits of the

Pulse Series

• Very light weight

• Switched mode

power supplies give
solid performance
at all power levels

• Microprocessor
protection system

• Massive heatsinks
for cooler operation
and higher
reliability

• Binding Post or
Speakon output
connector options

• Optional Remote
control via C Audio
CONNECT

• Internal crossover
card options

Occupying just 2U of rack
space, Pulse uses
massive heatsinks and
front-venting fans to
keep the electronics
really cool, plus a built-in
microprocessor which
continually monitors all
the protection aspects of
Pulse - these factors all
dramatically enhance
reliability.

Pulse amplifiers will
perform for longer
periods than conventional
amplifiers at high output
levels.

The combination of the
switched mode PSU and a
rugged steel chassis
means inherent strength.

Distortion <0.006% THD, 1kHz, 1dB below clip,

Frequency Resp. 20Hz to 20kHz, +0/-0.2dB;

Controls Power switch, bridge mode switching,

Indicators Mains present, Operate, Signal, Bridge,

Protection Microprocessor supervised:

Noise <-100dB ref full output 20Hz - 20kHz

Slew Rate >50 V/microsecond
Damping Factor >200 ref 8 Ohm
Output Connectors 4x300 - Binding post or Speakon

Power 115 or 230 volts AC nominal, internally

Dimensions 3.5" (89mm) x 18.2" (460mm) x 19" (483mm)

- with rear rack ears depth 19.5”, -21”, 20” (494, 511, 530mm)
Weight 24lbs (11kg)

Trade Descriptions Act: C Audio have a policy of continued product improvement and accordingly
reserve the right to change features and specifications without prior notice.

22kHz measurement bandwidth

<2Hz to >120kHz +0/-3dB

indented level controls (these may
be made tamper-proof)

Clip, Overtemperature, Protect, Remote

overtemperature, DC on outputs, output
stage overload, inrush current surge,
mains fail and brownout.

measurement bandwidth

2x650, 2x1100 - Binding post and Speakon

selectable, 2000VA, all channels
driven (4x300, 2x650); 3000VA (2x1100)

March 1999

3.5 in

89 mm

2U

Depth

18.2 in

460 mm

Pulse Series

Architect’s and Engineers Specifications

19 in / 483mm

Options and

Remote Control

Pulse options include:

- Front and rear rack
support brackets

- Input transformers

- Analogue Crossover
card

2-way and 3-way
crossovers

- Fan filters

- CONNECT
Remote Control

The CONNECT System by
C Audio allows remote
control and monitoring
of input signal, output
voltage and current,
temperature, and
protect status, and may
address over 100 Pulse
amplifiers.

The amplifier shall be light­weight, fit into 2 rack spaces
and have two (four) channels,
each capable of producing an
output of 650/1100 (300) Watts
into a 4 Ohm load with both (all)
channels driven. Each input
shall be electronically balanced
and have effective filtration
against RF and DC. Full rated
output with a 4 Ohm load shall
be achieved by an input signal
not exceeding +1dBu per
channel.

Each channel shall have a
+0/-0.2dB frequency response
from 20Hz to 20kHz at full
rated power into a nominal 4
Ohm and shall exhibit harmonic
distortion not exceeding

0.006% at 1kHz. Hum and noise
shall be at least 100dB below full
rated output when measured
over a 20Hz to 20kHz band­width with 50 Ohm input
termination. Channel
separation shall be in excess of
60dB at 1kHz.

The amplifier shall be stable into
any load configuration with any
combination of open or
grounded input connection, and
shall protect itself and its
loudspeaker loads against
mismatched, short or open
circuit loads, or any failure
which might otherwise cause a
DC offset voltage to appear at
its output.

Relay-less muting circuits shall
operate during power-up and
power-down and a
microprocessor controlled
thermal sensing system shall be
incorporated to independently
protect the amplifiers and their
power supplies against
over-temperature operation.

Two variable speed cooling fans
shall be incorporated, venting
warm air out of the front panel.

The amplifier shall carry signal
present indicators and an
output signal clip indicator
which accurately indicates
clipping irrespective of output

loading or mains supply voltage.
LEDs shall also be provided to
indicate the status of AC power
and the amplifier’s own
protection systems.

Audio input shall be via mirrored
XLR connectors and outputs via
tamper proof binding posts or
Speakon type connectors, with
switchable bridging for pairs of
outputs.

The amplifier shall offer the
following options: internal
analogue crossover facilities,
input transformers, fan filters,
additional rack mounting
hardware, and remote control
facilities over a low cost
network which can address
more than 100 individual
amplifiers.

The amplifier shall be a

C Audio Pulse 2x650/2x1000
(4x300).

C Audio BSS Audio USA

A Division of Harman International Industries Ltd, Harman Pro North America Inc

Summit Road, Potters Bar, Herts EN6 3JB England 1449, Donelson Pike, Nashville TN37217
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http://www.c-audio.com