dbx 2231 Caratteristiche e specifiche - Pagina 2

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2231

DUAL CHANNEL 31 BAND EQUALIZER / LIMITER WITH TYPE III™ NOISE REDUCTION

-10

+10

+18

OUTPUT

GAIN

LEVEL (dBu)

REDUCTION (dB)

CLIP

+10

+15

-12

+12

OFF

dBu

TYPE

III

INPUT

LOW

PeakPlus

RANGE

BYPASS

GAIN

CUT

THRESHOLD

-10

+10

+18

OUTPUT

GAIN

LEVEL (dBu)

REDUCTION (dB)

CLIP

+10

+15

-12

+12

OFF

dBu

TYPE

III

INPUT

LOW

PeakPlus

RANGE

BYPASS

GAIN

CUT

THRESHOLD

POWER

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.

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 0 dB. 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.

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

via front panel recessed switches with LEDs to indicate when the filters are active.

The graphic equalizer shall incorporate dbx Type III™ Noise Reduction providing up to 20dB

of broadband noise reduction, having front panel switches to enable the noise reduction and

LEDs to indicate when it is active. The equalizer shall also be equipped with dbx PeakPlus™

limiters having front panel 41-detent rotary limiter threshold controls varying from 0 to

+24dBu (off) and four-LED gain reduction bar graphs calibrated to read 0, 3, 6, and 10dB.

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.

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

nals and shall be removable by the user . Inputs shall be electronically balanced/unbalanced

and RF filtered having a nominal input impedance not less than 40kS balanced and 20kS

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 200S balanced and 100S unbalanced, and shall be capable of driving not less than

+21dBu into 2kS or greater and not less than +20dBm (into 600S) 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, in either boost/cut range

with noise reduction disabled and shall be greater than 102dB with noise reduction enabled.

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 b e magnetically isolated from equal-

izer 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 28W. 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 2231 Ult ra Quiet Equalizer/Limiter.

dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change wi thout notice.

A Harman International Company

+/-15

+/-6

+20

-6

31.5

100

125

+/-15

+/-6

+20

-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 2231

MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING

EQUALIZER/LIMITER WITH

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

TYPE III NOISE REDUCTION

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

4,473,793 OTHER PATENTS PENDING

The boost/cut ranges shall be

A 40Hz

A circuit/chassis ground lift

THD+Noise shall be less than 0.04% with a 1kHz signal at +4dBu,

160

200

250

315

400

500

630

800

1.25k

OUTPUT

Inputs

Connectors:

1/4" TRS, female XLR (pin 2 hot), and barrier ter-

minal strip

Type:

Electronically balanced/unbalanced, RF filtered

Impedance:

Balanced 40kS, unbalanced 20kS

Max Input Level:

>+21dBu balanced or unbalanced

CMRR:

>40dB, typically >55dB at 1kHz

Outputs

Connectors:

1/4" TRS, male XLR (pin 2 hot), and barrier termi-

nal strip

Type:

Impedance-balanced/unbalanced, RF filtered

Impedance:

Balanced 200S, unbalanced 100S

Max Output Level:

>+21dBu balanced/unbalanced into 2kS or

greater

>+20dBm balanced/unbalanced (into 600Ω)

System Performance

Bandwidth:

20Hz to 20kHz, +/-0.5dB

Frequency Response:

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

Noise Reduction In (+/-6 and +/-12dB range):

Signal-to-Noise:

>102dB, unweighted, ref: +4dBu, 22kHz measure-

ment bandwidth

Dynamic Range:

>120dB, unweighted

Noise Reduction Out: (+/-6dB range):

Signal-to-Noise:

>94dB, unweighted, ref: +4dBu, 22kHz measur-

ment bandwidth

Dynamic Range:

>112dB, unweighted

Noise Reduction Out: (+/-12dB range):

Signal-to-Noise:

>90dB, unweighted, ref: +4dBu, 22kHz measure-

ment bandwidth

Dynamic Range:

>108dB, unweighted

THD+Noise:

<0.04%, 0.02% typical at +4dBu, 1kHz

Interchannel Crosstalk:

<-80dB, 20Hz to 20kHz (2215/2231)

Noise Reduction:

Up to 20dB of dynamic broadband noise reduction

1.6k

2.5k

3.15k

6.3k

10k

12.5k

586

Dual Vacuum Tube

OUTPUT

INPUT

OUTPUT

INPUT

CONNECTOR POLARITY

PHONE:

XLR:

TIP

PIN 1

RING

PIN 2

SLEEVE

PIN 3

OUTPUT

INPUT

OUTPUT

INPUT

Function Switches

Type III NR:

Activates dbx Type III' Noise Reduction

EQ Bypass:

Bypasses the graphic equalizer section in the sig-

nal path

Low Cut (recessed):

Activates the 40Hz 18dB/octave Bessel high-pass

filter

Range (recessed):

Selects either +/- 6dB or +/- 15dB slider boost/cut

range

Indicators

Output Level Meter:

4-LED bar graph (Green, Green, Yellow, Red) at -

10, 0, +10, and +18dBu

Gain Reduction Meter:

4-LED bar graph (all Red) at 0, 3, 6, and 10dB

Type III NR Active:

Yellow LED

EQ Bypass:

Red LED

Clip:

Red LED

Low Cut Active:

Red LED

+/-6dB range:

Red LED

+/-12dB range:

Red LED

Power Supply

Operating Voltage:

100VAC 50/60Hz, 120VAC 60Hz

230VAC 50/60Hz

Power Consumption:

28W

Mains Connection:

IEC receptacle

Physical

Dimensions:

3.5" H X 19" W X 7.9" D (8.9cm x 48.3cm x

20.1cm)

Weight:

x.x lbs. (x.x kg)

Shipping Weight:

x.x lbs. (x.x kg)

Note: Specifications subject to change.

FOR MORE INFORMATION CONTACT:

dbx Professional Products

8760 S. Sandy Pkwy.

Phone (801) 568-7660

Fax (801) 568-7662

Int'l Fax (801) 568-7583

[email protected]

http://www.dbxpro.com

+15

-15

2231

16k

20k

Equalizer/Limiter

+15

with TYPE

III

-15

INPUT

Sandy, Utah 84070