ARX EC-1 Specifications

EC-1

Features

The ARX EC-1 and EC-2 are both flex­ible yet affordable 24 dB per octave
Phase Correct electronic crossovers.

They have 2 modes of operation; as
either Stereo 2 way or a Mono 3 way
units, with a switch on the back panel
selecting either mode.

• Tamper-Proof Crossover Points

The crossover points are determined
internally by the value of 4 resistors
per channel; changing the resistor val­ue changes the crossover point. This
‘semi fixed’ method avoids the pitfalls
of externally adjusted crossover points,
making the crossover points tamper­proof once they are set.

As a handy guide, a list of common
crossover points and their correspond­ing resistor values are printed inside
the unit's lid, and also set out in the
Owner's Manual.

On the front panel are level controls
for Low and High in dual channel 2 wa y
mode, and Low, Mid and High in sin­gle channel 3 way mode, with corre­sponding Outputs on the rear panel.

• Balanced Inputs (and Outputs)

The EC-1 has electronically Balanced
Inputs, on TRS jack connectors, and
the EC-2 has Balanced Inputs

and

Outputs, on XLR connectors.
The EC-2 also has an additional

summed Mono Low output, for appli­cations that need a Mono Low feed
(e.g. Left and Right full-range plus a
single Sub Bass speaker).

• High Pass Filter

Both models feature a preset 30 Hz
HighPass filter to remove unwanted
subsonics which can damage speak­ers and waste amplifier power.

In addition, each output has up to +6
dB of gain available, to compensate
for amplifiers and speakers of diff er­ing sensitivities.

• Universal AC Power

AC power r ange is a universal 100 to
120V or 220 to 240VAC, and is con­nected to the unit via a standard IEC
connector, with b uilt-in fuse and volt­age change switch.

• Uncompromising Audio Quality

Innovative circuit design is pointless
unless it delivers stunning sound
quality , and here the EC-1 and EC-2
excel. Both are designed f or uncom­promising audio quality, and to
achieve this, Linkwitz Riley 24dB
(Fourth Order) state variable filters
are used throughout their circuitry.
This ensures a smooth Phase Cor­rect transition through the crossover
region.

From Stage Monitors to Studio Mon­itors, from Front of House to the F ront

room of your House, the ARX EC-1
and EC-2 are both crossovers that
are suited to any application that re­quires flawless, transparent sound.

http://www.arx.com.au

þ Ultra low noise

circuitry

þ T otally phase

aligned at crosso­ver point

þ Switchable Dual

Channel 2 way or
Single Channel 3
way

þ Unique 'semi-fixed'

crossover point

þ 24dB per octave

(Fourth Order)
Linkwitz-Riley
filters

þ Separate Summed

Mono Output on
EC-2)

þ Balanced Inputs,

(and Outputs on
EC-2)

þ Built in High Pass

filters

þ Intuitive, 'user

friendly' layout

þ Flawless perform-

ance in any audio
environment

þ Security cover

available

Stereo 2 way , Mono 3 way
24dB Electronic Crossover

ARX Systems Pty Ltd, Australia; Phone: [phone] Fax: [phone]

FRONT PANEL

Your ARX dealer is:

EC-1, EC-2

Specifications

Input Impedance

Balanced 20 Kohms
Unbalanced 10 Kohms

Input Headroom

+ 21 dB

CMRR

>45 dB, 20 Hz—20 KHz

Output Impedance

Balanced 300 ohms(EC-2)

Unbalanced 150 ohms

Output Level (Max)

+ 21dB

Frequency Response

30Hz—20KHz±0.5dB
Note: 30 Hz is a function

of the High Pass filter
Signal to Noise ratio
(Controls at Unity)

-90 dB Unweighted

-93 dB ‘A’ weighted

Distortion

.004% THD,0dB,1KHz

Dynamic Range

111 dB

Power Requirements

100/120 V AC

220/240 V AC

Weight

5 lbs/2.2 Kg

Dimensions

19"W x 13/4"H x 6"D

482 x 44 x 155mm

Input Connector type

XLR, Balanced Jack

Output Connector type

XLR, Balanced Jack

Sidechain Insert Connector

TRS Jack
Crossover point frequencies are

changed internally by varying
the value of 4 resistors per
channel. Full details are in the
Service Notes section of the
Owner's Manual, and are also
printed inside the lid.

©1997 ARX Systems Pty.Ltd. ACN 006 471 825. All rights reserved. ARX Systems® is a Registered Trade Mark.

Specifications available on disk

<

Our policy is one of continuous improvement,
and therefore designs may change without
notice. However, unless otherwise stated, spec­ifications will always equal or exceed those
previously given.

http://www.arx.com.au

EC-1

• Balanced TRS Jack Inputs

• 2 way/ 3 way mode switch

• Low and High Output controls for 2 way mode

• Low , Mid and High Output controls for 3 way
mode

The crossover shall be a dual channel 2 way or sin­gle channel 3 way unit in a steel chassis six inches
deep and one rack unit high. There shall be a rear
panel switch to put the unit into either mode. The
crossover shall have true Linkwitz Riley 24 dB per
octave, phase corrected state variable filters.

The front panel shall feature controls for Low and
High frequencies in dual channel mode, and Low,
Mid and High frequencies in single channel mode.

There shall be corresponding outputs on the rear
panel, plus a separate mono low frequency summed
output (EC-2). Each output will have up to +6dB of
gain available, to compensate for amplifiers and
speakers of differing sensitivities. There shall also be
a preset 30 Hz High Pass filter to remove unwanted
subsonics.

(EC-2)The unit shall have electronically Balanced
inputs, on TipRingSleeve (TRS) jack connectors (Tip
+, Ring -, Sleeve Ground), and XLR connectors, with
passive RFI filters and an Input impedance of 20
Kohms (10 Kohms unbalanced). The Outputs shall

also be Balanced, on XLR connectors, with an output
impedance of 300 ohms balanced (150 ohms unbal­anced),

(EC-1)The unit shall have electronically Balanced in­puts, on TipRingSleeve (TRS) jack connectors (Tip +,
Ring -, Sleeve Ground).

The Input headroom shall be +21dB, with a CMRR of
better than 50dB, and the frequency response shall be
30 Hz, -0.5dB (as a function of the High Pass filter) to
20 KHz, +0.16dB, and the maximum Output level shall
be +21dB, with a Signal to Noise ratio of -93dB A
weighted (-90dB unweighted).

Total Harmonic Distortion shall be .004% @ 0dB, 1
KHz, and the unit shall have a dynamic range of 111dB.

AC Power shall be supplied via a removable mains ca­ble, connecting to an IEC connector with an integral
fuse and voltage change switch on the units rear pan­el.

The crossover shall be the ARX EC-1

REAR PANEL

ARCHITECTS AND
ENGINEERS SPECIFICA TIONS

• Marker panels for labelling crossover assigns

• 2 way/3 way status LEDs (EC-2)