dbx 231 User manual

8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
Int’l Fax [phone]
[email protected]
http://www.dbxpro.com
A Harman International Company
18-0111-A 7/02
231
Dual Channel 31-Band Graphic Equalizer
®
With a lineage extending back to the revered 12 and 20 Series graphic equal-
izers, the dbx 231 easily lives up to the dbx reputation at a price point which
can find a home in the tightest of budgets. Besides including two 31-band
channels of 1/3-octave equalization, the 231 also offers +12 dB input gain
range; switchable +6 or +12 dB boost/cut range; XLR, 20mm faders and 1/4''
inputs; nonconductive nylon sliders; and an intuitive user interface with com-
prehensive output and gain reduction metering. As always, the inevitable result
of our meticulous attention to detail and top-quality componentry is excep-
tional sound, performance, and reliability.
The 2-Series represents a major step forward in the performance of entry-level
graphic equalizers. From its amazing 10Hz to 50kHz frequency response, to its
108dB dynamic range and internal toroidal transformer, the 2-Series offers out
of this world specifications with a down to earth price point. Sure to find a
home in the studio, on tour and with installed sound venues, the 2-Series is des-
tined to take its rightful place in the lineage of great dbx®signal processors that
are the Professional’s Choice™. With such affordable quality, there’s no longer
any excuse for compromising your sound.
• Two 31-band, 1/3-octave
Constant Q frequency bands
• Switchable boost/cut ranges
of ±6 or ±12 dB
• 12dB per octave 40Hz
low-cut filter
• Front panel bypass switch
• ±12 dB input gain range
• 4-segment LED ladders for
monitoring output levels
• XLR and TRS Inputs and
Outputs
• Internal Toroidal
Transformer
• Frequency Response of <10
Hz to >50kHz
• Dynamic range of greater
than 108dB

Inputs
Connectors: 1/4" TRS, female XLR (pin 2 hot)
Type: Electronically balanced/unbalanced, RF filtered
Impedance: Balanced 40kΩ, unbalanced 20kΩ
Max Input Level: >+21dBu balanced or unbalanced
CMRR: >40dB, typically >55dB at 1kHz
Outputs
Connectors: 1/4" TRS, male XLR (pin 2 hot)
Type: Impedance-balanced/unbalanced, RF filtered
Impedance: Balanced 100Ω, unbalanced 50Ω
Max Output Level: >+21dBu balanced/unbalanced into 2kΩor greater
>+18dBm balanced/unbalanced (into 600Ω)
System Performance
Bandwidth: 20Hz to 20kHz, +0.5/-1dB
Frequency Response: <10Hz to >50kHz, +0.5/-3dB
Dynamic Range: 108db
Signal-to-Noise: 90db
THD+Noise: <0.004%
Interchannel Crosstalk:<-80dB, 20Hz to 20kHz
Function Switches
EQ Bypass: Bypasses the graphic equalizer section in the signal path
Low Cut: Activates the 50Hz 12dB/octave high-pass filter
Range: Selects either +/- 6dB or +/- 12dB slider boost/cut range
Power Supply
Operating Voltage: 100VAC 50/60Hz, 120VAC 60Hz, 230VAC 50/60Hz
Power Consumption: 15W
Mains Connection: IEC receptacle
Note: Specifications subject to change.
231
Dual Channel 31-Band Graphic Equalizer
dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.
FOR MORE INFORMATION CONTACT:
dbx Professional Products
8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
[email protected]
http://www.dbxpro.com
A Harman International Company
The Professional’s Choice In Signal Processing