Electro voice xeq 2 actcross

Page 2

E] XEO-Z ELECTRONIC CROSSOVER

XEO-Z ELECTRONIC CROSSOVER

TABLE OF CONTENTS
Section "
Sub-sect Description Page
' XEO-Z Equalized Electronic Crossover

1 0 General Information 2
1.1 Specifications 2
1.2 General Servicing Information 3
1 3 Repair Parts 3
2.0 Disassembly Instructions 3
2.2 Custom Frequency Calculation 3
2.3 Module Construction 4
2.4 Service Note 4
3.0 Circuit Description 6
4.0 Parts Lists 8

Schematics 10

PCB Assembly dwgs. 11

XEQ.2 EQUALIZED ELECTRONIC CROSSOVER
1.0 GENERAL INFORMATION

The Electro-Voice XEQ~2 is a single channel
equalized, electronic crossover. A plug-in 16 pin DIP
module sets the crossover frequency. The module
may be ordered from stock or custom made for non~
standard crossover frequencies. By suitable strapping
in the plug in module, the crossover slopemay be
changed from 18 dB/octave to 12 or 6 dB/octave.

The XEO-Z an also provide required equalization
for the Electra-Voice TL series low frequency
systems and HR series Constant Directlvity horns.
In addition, a third-order (18 dB/oct.) subsonic
rolloff at 30 Hz is provided. TL series low frequency
equalization is selected with a rotary switch and HR
series equalization is selected via another 16 pin
DIP module.

A time delay control is provided which electron-
ically delays the low-frequency channel with respect
to the high frequency channel. The amount of delay
is continuously variable between 25 usec and
2 msec.

Transformer balanced outputs are available asa user
installable option. Instructions are packed with the
transformer accessory (EV Model TRB-l ).

1.1 SPECIFICATIONS
Type:

Equalized, electronic crossover
Frequency Response:

3020 kHz, 3: 0.5 dB, -3 dB at 30 Hz sum of
outputs. controls flat

Noise Output:
~90 dB V maximum re 1 V, 20 kHz noise
bandwidth

Total Harmonic Distortion:

0.02% typical, 0.1% max @ 20 kHz, 120 dBm
Overall Gain:

0 dB into high-Z load
Minimum Load 2:

600 ohms
Output Source Z:

47 ohms
Input Configuration:

Balanced or Unbalanced
Input 2:

30 k balanced bridging, 15 k unbalanced
Input CMR:

55 dB typical, 60-1 kHz
Connectors:

1/4 inch tip-ring-sleeve phone jacks and XLR»3
RCA for low frequency summing

Delay:
Adjustable. 25 usec to 2 msec at 100 Hz low
frequency output
High Pass Filter:
-3 dB at 30 Hz, 12 dB/octave
Low Frequency E0 for Step-Down Operation
of TL Bass Speakers:

Second order, under-damped filter with
switchable +6 dB boost frequency and flat
position with 30 Hz rolloff

Filter Type:

Thirdorder Butterworth (18 dB/octave). See
Table 1. Other orders and alignments by
custom construction, high and low frequency
crossover points independently chosen

Plug-In Horn/Driver Equalization:
Flat module supplied, others listed in Table 1
HF Equalization:
:4dBat10kHz,Q=3
Size:
1.73 inch x 19 inches x 4.875 inches
Net Weight:
4.74 lbs
Power Requirements:
90-120 V ac, 50-60 Hz, 8 W
Accessories:

Security Cover (supplied), TRB-1 balanced

output transformers, BMK blank module kit

one