Arx Ec-2 User manual

EC-2

TheARX EC-2 is a flexible, affordable 24

dB per octave Phase Correct electronic

crossover.

It has 2 modes of operation; as either a

Stereo 2 way or a Mono 3 way unit, with a

switch on the back panel selecting either

mode.

• Tamper-Proof Crossover Points

The crossover points are determined in-

ternally by the value of 4 resistors per

channel; changing the resistor value

changes the crossover point. This ‘semi

fixed’ method avoids the pitfalls of exter-

nally adjusted crossover points, making

the crossover points tamper-proof once

they are set.

Asa handyguide, alist ofcommon cross-

overpoints and their corresponding resis-

tor 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 way

mode, and Low, Mid and High in single

channel 3 way mode, with corresponding

Outputs on the rear panel.

• Balanced Inputs and Outputs

TheEC-2Balanced Inputsandoutputson

XLR connectors. It also has an additional

summed Mono Low output, for applica-

tionsthatneed aMono Low feed(e.g. Left

and Right full-range plus a single Sub

Bass speaker).

• High Pass Filter

There is 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

amplifiersand speakers ofdifferingsen-

sitivities.

• Universal AC Power

AC power range is a universal 100 to

120Vor 220 to240VAC,andis connect-

ed to the unit via a standard IEC con-

nector, with built-in fuse and voltage

change switch.

• Uncompromising Audio Quality

Innovativecircuit design is pointless un-

less it delivers stunning sound quality,

and here the EC-2 excels. It has been

designed to provide uncompromising

audio quality, and to achieve this, Link-

witzRiley24dB(Fourth Order)statevar-

iable filters are used throughout the cir-

cuitry. This ensures a smooth Phase

Correcttransition through the crossover

region.

FromStageMonitorstoStudio Monitors,

from Front of House to the Front room

of your House, the EC-2 is a crossover

that is suited to any application requir-

ing flawless, transparent sound.

Stereo 2 way, Mono 3 way

24dB Electronic Crossover

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Ultra low noise

circuitry

Totally phase

aligned at crosso-

ver point

Switchable Dual

Channel 2 way or

Single Channel 3

way

Unique 'semi-

fixed' crossover

point

24dB per octave

(Fourth Order)

Linkwitz-Riley

filters

Separate Summed

Mono Output for

Satellite/Sub

systems

Balanced Inputs,

and Outputs

Built in High Pass

filters

Intuitive, 'user

friendly' layout

Flawless perform-

ance in any audio

environment

Security cover

available

Input Impedance

Balanced 20Kohms

Unbalanced10Kohms

Input Headroom

+ 21 dB

CMRR

>45 dB, 20 Hz—20 KHz

Output Impedance

Balanced300ohms

Unbalanced150ohms

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)

-90dBUnweighted

-93dB‘A’ weighted

Distortion

.004%THD,0dB,1KHz

Dynamic Range

111 dB

Power Requirements

100/120VAC

220/240VAC

Weight

5lbs/2.2Kg

Dimensions

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

482 x 44 x 155mm

Input Connector type

XLR,BalancedJack

Output Connector type

XLR

Crossover point frequencies

are changed internally by

varying the value of 4 resis-

tors per channel. Full details

are in the Service Notes sec-

tion of the Owner's Manual,

and are also printed inside

the lid.

• Balanced XLR Inputs and Outputs

• Additionalsummed mono Low output

• 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 chas-

sis 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.

Thefrontpanel shallfeaturecontrols for Low

and High frequencies in dual channel mode,

and Low, Mid and High frequencies in sin-

gle channel mode.

Thereshallbecorresponding outputs on the

rear panel, plus a separate mono low fre-

quency summed output. Each output will

have up to +6dB of gain available, to com-

pensate for amplifiers and speakers of dif-

fering sensitivities. There shall also be a pre-

set30HzHigh Passfilterto remove unwant-

ed subsonics.

The unit shall have electronically Balanced

inputs, on TipRingSleeve (TRS) jack connec-

tors (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 Bal-

anced, on XLR connectors, with an output

impedance of 300 ohms balanced (150 ohms

unbalanced),

The Input headroom shall be +21dB, with a

CMRR of better than 50dB, and the frequen-

cy response shall be 30 Hz, -0.5dB (as a func-

tion of the High Pass filter) to 20 KHz,

+0.16dB, and the maximumOutput 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-2

• Markerpanelsfor labelling crossover assigns

• 2 way/3 way status LEDs

Our policy is one of continuous im-

provement, and therefore designs

maychangewithoutnotice.Howev-

er, unless otherwise stated, specifi-

cations will always equal or exceed

thosepreviouslygiven.

• AC input connector, with voltage switch and

fuse.

ARX Systems are based in Melbourne, Australia, where all ARX Products are assem-

bled and tested in our ‘state-of-the-art’ manufacturing facility

For over 20 yearsARX has designed, manufactured and supportedAudio Products for

Professional users and applications worldwide

ARX Systems Pty Ltd; PO Box 15, Moorabbin, Victoria 3189, Australia

Phone: 03 9555 7859 Fax: 03 9555 6747 International Fax +61 3 9555 6747

Email: [email protected] Internet: www.arx.com.au

SpecificationsavailableonCDROM

Latestupdatesalways available on theARX website - www.arx.com.au

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