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UREI ELECTRONIC

PRODUCTS

FEATURES:
Dual channel Crossover frequency selectable by plug-in circuit board

12 dB or 18 dB per octave filter slope Switchable subsonic high-pass functions THD: O.Ol%, 20 Hz-20 kHz Signal/Noise ratio greater than 90 dB

L

The 5235 Electronic Frequency Dividing Network is designed for use with studio monitor or sound reinforcement loudspeaker systems to provide a cleaner signal from the power source directly to the individual loudspeakers of the system. By dividing the audio spectrum before power amplification, treble tones are separated from, and unaffected by, bass frequencies. The result is more efficient utilization of available amplifier power. Direct coupling to the loudspeakers also eliminates the insertion loss typical of most passive networks and permits realization of the maximum damping

factor available from a given amplifier. The 5235, a dual-channel unit, can be used for biamplification of two loudspeaker systems or to control both transition points in a triamplified system. The latter can be accomplished by utilizing one channel for the lower crossover frequency and the other channel for the high frequency transition. The 5235 is an electronic crossover network utilizing active filters. It exhibits unity gain in the low-pass output, and a maximum gain of 2 (+6 dB) in the high-pass output, with a continuous level control for high-frequency shelving. It provides adequate output to drive any quality amplifier, and operates at extremely low distortion levels at full rated output. A programmable high pass filter removes subsonic energy below the lowest usable speaker frequency. The crossover frequency is determined by inserting the proper printed circuit card into each channel' circuitry. Cards s with filter slopes of 18 dB per octave are available for cross-

over frequencies of 80 Hz, 500 Hz, and 800 Hz. Cards with filter slopes of I2 dB per octave are available for the following frequencies: 250 Hz, 500 Hz, 800 Hz, 1200 Hz, 5 kHz, and 7 kHz. In addition, cards are available with specific crossover characteristics for large JBL studio monitors. Blank cards are also available to allow construction of circuitry for other

ARCHITECTS

SPECIFICATIONS:

crossover

frequencies.

The sound system described herem shall be eqwpped wth separate poweramphfws for low lmldrangel and high frequency program matenal A dual-channel low-level actwe network shall be prowded to filter program matenal at the designated cr~sswer pomtlsl The Inputs shall be transformerless and symmetrical Dual-m-lme swtchine.shall prowde selectable lowfrequency equahzatlon and subsow flltering The frequency dlwdmg network shall be equipped wth separate output bufferamphfws for lowand high frequency program material Crossover frequency selection shall be accomphshed by Internally mounted plug-m circwt modules Each module shall be deslgned wth the cr~~swer frequency prmted III such a powon as to be easily read through a window m the front panel of the electronic frequency dividmg network The designated crossover frequency shall be the point at which the slopes of the pass band wrves cross and where each IS 3 dB down from the average output level This point shall be wthm f 10% of the designated frequency The filter slope shall be 12 dB or I8 dB per octave The unmodlfwd frequency response of the dwdmg network shall be 20 Hz-20 kHz. + 0 5 dB Dlstortmn shall be less than 003%THDat + lXdB.and OOl%THD, + 18dBv ,nto a 100 kn load Signal-to-noise ratlO shall be greater than 90 dB at rated output, 20 Hz-20 kHz eqwalent bandwdth Internal prwwx shall be made for swtch selectmn of parallel monaural low frequency Outputs A high-pass filter wth I2 dB per O` tave slope shall remove subsomc energy below the lowest usable speaker frequency A dual-In-hne swtch shall prowde the followmg programmable Optmns for the subsonic filter a Flat frequency response slope, Q=2 16 dB boost @ 20 Hz) b 20 Hz high pass filter. I2 dB/octave slope, Q=O 701 IButterworth) c 20 Hz high pass filter. 12 dB/octave d 30 Hz high pass biter, I2 dB/octave slope. Q=O 54

Input and output terminals for the 5235. The dual channels can be utilized for triamplification of a single loudspeaker system by connecting the low frequency output of one channel to the input terminals of the other channel. This allows separate, completely independent adiustment of the midrange and high frequencies.

e 30 HZ high pass hlter, 12 de/octave slope, Q=O 84 f 30 Hz high pass hlter, I2 dB/octave slope, Q=2 I6 dB boost @ 30 Hz, g 40 Hz high pass hlter, I2 dB/octave slope. Q=O 707 IButteworthl h 40 Hz high pass filter. I2 dB/octave slope. Q= 2 16 dB boost @ 40 Hrl lsolatmn between channels shall be greater than 70 dB The electrow be a IBL 5235 cmss~ver network shall

SPECIFICATIONS:
Cam 0 dB low-pass output output Crossover Cards (one required per channel) 5l-5130-Blank 51-5232-500 51-5133-800 Distortion. 0 01% THD. @ + Frequency Crossover Response: Frequency. 18dBu 20 Hz-2OkHz into > 100 kn kHz module, -t 10% . load 5 I-5 138-80 51-5232-500 Hz Hz Hz Card unloaded I8 dB/Octave I8 dB/Octave 18 dB/Octave I8 dB/Octave Correction wth Power Horns + 6 dB, high-pass Rated Output MaxImum 18 dB/octave 6 2 V ( + I8 dBu) Hz, I8 dB/Octave for 2360~Senes BI-Radial' " wth Power Horns

?O 5 dB, 20 Hz-20 Selectable -3 by plug-in

Response 51-5233-800

Constant-Coverage Hz, I8 dB/Octave Correction I8 dB/Octave, CorrectIon Bt-Radial' " CorrectIon Bl-Radtal' " Correctjon BI-Radial' " Response 51-5332-500 Filter 0 707 2 0.54 084 2 0 707 2 Q Hz

dB crossover

point

for 2360~Sews BI-Radial' " wth Horns wth Horns wth Horns wth Horns I2 dB/Octave Power for 2380~Sews Power for 2380 Senes Power for 2380-Sews Power

Filter High

Slope.

I2 dB/octave Filter Frequency 20 Hz 20 Hz 30 Hz 30 Hz 30 Hz 40 Hz 40 Hz

or I8 dB/octave Level at Filter Frequency -3dB f6dB -55dB -15dB +6dB -3dB +6dB

Constant-Coverage Response Flat-Front 51-5333-800 Response Flat-Front 51-5334-1200 Response Flat-Front 51-5336-1600 Hz Response Flat-Front I2 dB/octave 52-5120-Blank 52-5121-250 Hz Hz Hz Hz Hz Hz 52-5 122-500 52-5 123-800 bandwidth 52-5124-1200 52-5125-5000 52-5 127-7000 barrier strips IEC and 52-5 I SO-For 52-5222-500 Card

Pass Filtering:

for 2380~Senes

Hz, I8 dB/Octave

Hz, I8 dB/Octave

Input

Impedance.

40 kn.

balanced;

I8 dB/Octave, CorrectIon Bl-Radial' " Unloaded

20 kR. unbalanced Load Output Channel Signal/Noise Impedance. Impedance. Isolation. Ratio. Controls. 600 a or greater 50 a, unbalanced > 70 dB, 20 Hz-20 kHz

I2 dB/Octave I2 dB/Octave I2 dB/Octave I2 dB/Octave I2 dB/Octave 4435 Studlo with Monltor Power Horns 12 dB/Octave Correction

> 90 dB. 20 kHz equivalent High Supply frequency voltage level. select Power;

Hz, I2 dB/Octave

Connections.

Inputs XLR/QG

and outputs connectors

on rear panel Power

4430 and

through

3-wire

Response 52-5223-800

for 2360.Senes Bl-Radial' " with Power Horns

Constant-Coverage Power Operating Requlrements Temperature Dimensions. 6 W IOO-120/200-240 VAC 50/60 Hz Hz, 12 dB/Octave CorrectIon 12 dB/Octave Correction B!-Radial' " I2 dB/Octave CorrectIon Bi-Radial' " Response 52-5322-500 Hz

5°C (41°F) to 55°C (132°F) 483 mm x 44 mm x 194 mm deep (I9 in x IM in x 7% in deep) (4 lb)

for 2360-Senes BI-Radial' " wth Horns wth Horns Power for 2380~Senes Power

Constant-Coverage Response Flat-Front 52-5323-800 Hz Response Flat-Front

Net Weight: Shipping Weight

I 8 kg

for 2380~Senes

3 kg (6% lb)

Note OdBm

=

I mW:OdBu

= 0775V

q

5

UREI ELECTRONIC PRODUCTS
8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329 U.S.A.
SS5235 15M B/89 P887

JBL Professional,