ART EQ351 SINGLE 31 BAND EQ

ART?s 351 Single Channel 31 band 1/3 octave graphic equalizer features: constant Q circuitry
with a 3% center frequency accuracy, 20mm center detent sliders, selectable boost/cut range
of 6dB or 12dB, active balanced and unbalanced input and output connect-ions, adjustable high
pass filter, adjustable low pass filter, variable input level control, clip level indicators, ground lift
switch, internal power supply and selectable line voltage switch. A range control switch is provided
which allows you to set the maximum boost or cut for each band of equalization to either 6dB
or 12dB. The high pass filter rolls off lower frequencies which is useful for decreasing rumble or
low frequency hum from a signal . Its range is adjustable from 10Hz to 250Hz. Frequencies below
this setting are rolled off, while frequencies above are unaffected. The low pass filter rolls off higher
frequencies which is useful for reducing hiss or sibilance from a signal. Its range is adjustable
from 3kHz to 40kHz. The rugged, all-steel constructed chassis occupies 1U rack space and is
intended for installation in standard 19" equipment racks.
Multiple input and output configurations are provided for ease of use and incorporate paralleled
connections. The XLR and 1/4" TRS connectors use active balanced, low noise circuitry. XLR
connections are: Pin 1 = ground, Pin 2 = Hot (+), and Pin 3 = Cold (-). The 1/4" TRS connections
are: Tip = Hot (+), Ring = Cold (-), and Sleeve = ground. Both the XLR and 1/4" connectors may
be used in an unbalanced configuration. The RCA jacks are unbalanced. The 351 is designed to
work with a variety of signal levels. The input level control covers a wide range and can easily
accommodate -10 and +4 signal lev els. A clip LED will light when a signal level of 5dB before
clipping occurs.
The 351 may be used in a variety of applications such as live sound, recording studios, instrument
racks as well as any conventional fixed installation environment. Use the 351 equalizer wherever
precise modification of the frequency contour of a sound is needed. The 351 graphic equalizer is a
powerful tool for solving a number of audio problems and creating interesting sound textures. Patch
the EQ between your mixing console and power amps to allow you to alter the overall mix to better
match your environment. Use the 351 between your monitor mixer and monitor power amps to aid in
the removal of feedback inducing frequencies. Patch into a channel insert to EQ one channel or track
individually. Run your instrument directly into the equalizer to enhance its sound before reaching a
power amplifier or instrument amplifier. Patch the 351 into the effects loop of an instrument amplifier
or between a preamp and power amp to have precise control over the complete sound.

The 351 Single Channel 31 Band Eq has the features and performance you need for any of your audio
applications requiring equalization. For the latest in equalizer technology today, check out the 351 at
your favorite ART dealer.

351 - Single 31 band EQ Features:

Single Channel 31-Band Graphic Equalizer
Constant-Q Filtering
Balanced XLR, Active Balanced 1/4“, and Unbalanced RCA Input and Output Connectors
+/- 6dB or +/-12dB Level Adjustments
20mm Center Detented Frequency Band Sliders
Independent Level and Bypass Controls Per Channel
Designed for Years of continuous, reliable performance
Rugged All Steel Construction
One Year Warranty

1215 Dual 15-Band Graphic Equalizer

The dbx 12 Series were designed to meet the needs of the most
demanding sound reinforcement environments, while offering the
simplicity of straightforward controls. The 1215 provides standard
features like dual channels, 15 2/3 octave bands, ISO frequency
centers, +/-12 dB input gain range, and switchable 40Hz/18 dB per
octave low-cut filters, but also includes other thoughtful features.
These include 45 mm faders; selectable +/-6dB or +/-15dB boost/cut
range for precise gain adjustments; XLR, barrier strip, and 1/4'' TRS
connectors for installation ease; balanced inputs and outputs for quiet
operation; and chassis/signal ground lift capabilities for quick hum isolation.
The visionary design of the dbx 12 Series makes your job easier.

The dbx 12 Series Equalizers were precision engineered to provide years
of maintenance-free operation in any application. The magnetically isolated
transformer, electronically balanced/unbalanced inputs and servo balanced/
unbalanced outputs, RF-filtered inputs and outputs, and power-off hard-wire
relay bypass with 2 second power up delay were steps our engineers took
to ensure compatibility for all installations. Only the best components were
utilized, yielding a 10Hz to 50kHz frequency response, greater than 90dB SNR
(ref +4dBu), less than 0.005% THD +Noise (1kHz at +4dBu), and interchannel
crosstalk of less than -80dB from 20Hz to 20kHz. All this attention to detail
is contained in a 2U steel/aluminum chassis.

•   Switchable boost/cut ranges of ±6 or ±15 dB
•   Electronically balanced/unbalanced inputs
•   Servo balanced/unbalanced inputs
•   RF filtered inputs and outputs
•  XLR, Barrier Strip, and 1/4" TRS connectors
•  -12dB/+12dB input gain range
•  18dB/octave 40Hz Bessel low-cut filter
•  Chassis/signal ground lift capability
•  Internal power supply transformer
•  Power-off hardwire relay bypass with 2-second power-up delay

The Rane ME 15S microGraphic Equalizer is a two-channel, 2/3-octave design with 20 mm sliders in a single rack space unit. It features a Range switch for high slider resolution in the ±6 dB mode, equivalent resolution to 45 mm sliders found on the DEQ 60L. The ±12 dB mode provides a wide range of control over system audio.

The active filter sections feature Raneʼs innovative constant-Q (constant bandwidth) design. Constant-Q means the bandwidth of each individual filter is guaranteed to be narrow enough to prevent unwarranted interaction between filters, yet wide enough to produce exactly the type of correction curve demanded by even the most unusual acoustic surroundings. This differs dramatically from conventional designs of the past, encumbered with the unfortunate characteristic of changing bandwidth when changing boost/cut amounts.

Front panel controls and indicators include an overall rotary Level control for each channel as well as Overload indicators. Passive pushbutton Bypass switches feature LED indicators, avoiding ambiguity by being on when the unit is Bypassed. (A passive Bypass switch requires no power to operate. This allows completion of the audio path should power fail in the ME 15S.)

Inputs and Outputs are electronically balanced designs, capable of unbalanced operation when required. They accept and drive all possible signal levels into normal load impedances. Balanced applications choose between the XLR or 1/4" Tip-Ring-Sleeve connectors. Unbalanced sources also may tie to the ME 15S through mono 1/4" connectors (no ring connection).

• Constant-Q Bandwidth Design
• Overall Level Controls and Passive Bypass Switches
• 20 mm Filter Slide Controls with ±6 dB or ±12 dB Slider Range
• Infrasonic, Ultrasonic, & RFI Filters
• Balanced XLR and 1/4" TRS Inputs and Outputs
• Universal internal switching power supply (100-240 VAC)

Phonic's GEQ3102F is the authentic soundman's choice of EQ - a dual channel 31-band equalizer, offering 6 or 12 dB of cut or boost on standard ISO center frequencies between 20 Hz and 20 KHz. The GEQ3102F is 2-rack space units high and accepts both 1/4" TRS phone jacks and XLR connectors, making it ideal for any studio or live venue setup.

• Sweepable high and low cut filters on each channel to remove unwanted frequencies 
• Ultra low-noise audio operational amplifiers offer outstanding sound performance 
• Relay-controlled hard-bypass with an auto-bypass function during power failure 
• Dedicated subwoofer output with user-adjustable low-pass filter
• Feedback detection circuitry for indicating critical frequencies
• Balanced inputs and outputs with 1/4" TRS and XLR connectors