dbx 1231 Особливості та технічні характеристики - Сторінка 2

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1231

DUAL CHANNEL 31 BAND EQUALIZER

-10

+10

+18

OUTPUT

LEVEL (dBu)

CLIP

-12

+12

INPUT

LOW

BYPASS

GAIN

CUT

-10

+10

+18

OUTPUT

LEVEL (dBu)

CLIP

-12

+12

INPUT

LOW

BYPASS

GAIN

CUT

POWER

24 WATTS

100V

50/60Hz

120V

60Hz

The graphic equalizer shall be a dual 31-band type with frequency centers on standard ISO

one-third octave frequencies ranging from 20Hz to 20kHz. The boost/cut ranges shall be

switchable via recessed front panel switches to either +/-6dB or +/-15dB and the selected

range shall be indicated on the front panel by either of two LEDs per channel. Low-noise

equalization sliders having a 45mm travel shall be utilized having center detents at 0dB.

The equalizer shall have front panel 41-detent rotary input gain controls having a +/-12dB

range. Bypassing the equalizer sections of the signal path shall be accomplished via front-

panel switches having corresponding LEDs to indicate when each channel is bypassed. A

40Hz low-cut Bessel filter per channel with 18dB/octave slope shall be insertable in the

signal path via front panel recessed switches with an LED to indicate when the filter is

active. Output levels shall be monitored on four-LED peak-reading bar graphs calibrated to

read -10, 0, +10, and +18dBu.

Electronically balanced/unbalanced inputs shall include 1/4" TRS, female XLR, and screw

terminal barrier strip, while servo-balanced/unbalanced outputs shall include 1/4" TRS,

male XLR, and screw terminal barrier strip shared with the input. A circuit/chassis ground

lift jumper per channel shall be strapped across circuit ground and chassis ground screw

terminals and shall be removable by the user.

balanced/unbalanced and RF filtered having a nominal input impedance not less than 40kΩ

balanced and 20kΩ unbalanced, and shall accept maximum signal levels of not less than

+21dBu. Outputs shall be servo-balanced/unbalanced and RF filtered having a nominal

output impedance of not more than 200Ω balanced and 100Ω unbalanced, and shall be

capable of driving not less than +21dBu into 2kΩ or greater and not less than +20dBm (into

600Ω) continuously.

Frequency response shall be better than 10Hz to 50kHz, +0.5/-3dB. Signal-to-noise ratio

shall be greater than 90dB, referenced to +4dBu. THD+Noise shall be less than 0.005%

with a 1kHz signal at +4dBu, while interchannel crosstalk shall be lower than -80dB from

20Hz to 20kHz.

The internal power supply shall be constructed using a thermally-fused transformer

mounted in a low hum orientation and shall be magnetically isolated from equalizer

circuitry by means of a mu-metal shield. The power cord shall be detachable from an

international standard IEC 320 power inlet receptacle. Unit shall be constructed to meet or

exceed all applicable international safety and regulatory agencies. Domestic unit shall be

powered from 100VAC 50/60Hz, 120VAC 60Hz, while international unit shall be powered

from 230VAC 50/60Hz. Unit shall consume no more than 24W. Housing shall be of all

steel/aluminum construction and shall be rack-mountable in an IEC standard 19" rack and shall occupy a 3U (5.25") rack space. The unit shall be a dbx 1231

Equalizer.

dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.

A Harman International Company

+/-15

+/-6

RANGE

-6

31.5

100

+/-15

+/-6

RANGE

-6

C A U T I O N :

T O R E D U C E

T H E R I S K O F F I R E R E P L A C E

R I S K O F E L E C T R I C S H O C K

O N LY W I T H S A M E T Y P E F U S E .

D O N O T O P E N

AT T E N T I O N :

U T I L I S E R

AT T E N T I O N :

R I S Q U E D E C H O C E L E C T R I Q U E - N E PA S O U V R I R

U N F U S I B L E D E R E C H A N G E D E

W A R N I N G :

T O R E D U C E T H E R I S K O F F I R E O R E L E C T R I C

M E M E T Y P E .

S H O C K D O N O T E X P O S E T H I S E Q U I P M E N T T O R A I N O R M O I S T U R E

PROFESSIONAL PRODUCTS

A HARMAN INTERNATIONAL

COMPANY

MODEL 1231

MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING

GRAPHIC EQUALIZER

U.S. PATENTS: 4,234,804 4,316,107 4,329,598 4,331,931 4,377,792

4,403,199 4,409,500 4,425,551 4,434,380 4,454,433 4,471,324

4,473,793 OTHER PATENTS PENDING

Inputs

Connectors:

Type:

Impedance:

Max Input Level:

CMRR:

1kHz

Outputs

Connectors:

Type:

Inputs shall be electronically

Impedance:

Max Output Level:

System Performance

Bandwidth:

Frequency Response:

Dynamic Range:

Signal-to-Noise:

THD+Noise:

125

160

200

250

315

400

500

630

800

OUTPUT

1/4" TRS, female XLR (pin 2

hot), and barrier terminal strip

Electronically

balanced/unbalanced, RF

filtered

Balanced 40kΩ, unbalanced

20kΩ

>+21dBu balanced or

unbalanced

>40dB, typically >55dB at

1/4" TRS, male XLR (pin 2

hot), and barrier terminal strip

Impedance-

balanced/unbalanced, RF

filtered

Balanced 200Ω, unbalanced

100Ω

>+21dBu balanced/unbalanced

into 2kΩ or greater

>+18dBm

balanced/unbalanced (into

600Ω)

20Hz to 20kHz, +0.5/-1dB

<10Hz to >50kHz, +0.5/-3dB

+/-15dB range +/-6dB range

109db

90db

<0.005%

1.25k

1.6k

2.5k

3.15k

6.3k

10k

586

Dual Vacuum Tub

OUTPUT

INPUT

OUTPUT

INPUT

CONNECTOR POLARITY

PHONE:

XLR:

TIP

PIN 1

RING

PIN 2

SLEEVE

PIN 3

OUTPUT

INPUT

OUTPUT

INPUT

Interchannel Crosstalk:

Function Switches

EQ Bypass:

Low Cut (recessed):

Range (recessed):

Indicators

Output Level:

EQ Bypass:

Clip:

Low Cut:

+/-6dB:

+/-15dB:

Power Supply

Operating Voltage:

Power Consumption:

Mains Connection:

Physical

Dimensions:

115db

Weight:

97db

Shipping Weight:

FOR MORE INFORMATION CONTACT:

dbx Professional Products

Phone (801) 568-7660

Int'l Fax (801) 568-7583

[email protected]

http://www.dbxpro.com

+15

-15

1231

12.5k

16k

20k

Graphic Equalizer

+15

-15

INPUT

<-80dB, 20Hz to 20kHz

Bypasses the graphic equalizer

section in the signal path

Activates the 40Hz

18dB/octave Bessel high-pass

filter

Selects either +/- 6dB or +/-

15dB slider boost/cut range

4-LED bar graph (Green,

Green, Yellow, Red) at -10, 0,

+10, and +18dBu

1 LED: red

1 LED: yellow

1 LED: red

100VAC 50/60Hz, 120VAC

60Hz, 230VAC 50/60Hz

1215 24W; 1231 24W

IEC receptacle

1215: 3.5" H X 19" W X 7.9" D

(8.9cm x 48.3cm x 20.1cm)

1231: 5.25" H X 19" W X 7.9"

D (13.4cm x 48.3cm x 20.1cm)

1215: 8.5 lbs.

1231: 10.6 lbs.

1215: 9.5 lbs.

8760 S. Sandy Pkwy.

Sandy, Utah 84070

Fax (801) 568-7662