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

DBX 2215 Dual 15-Band Graphic Equalizer with Noise Reduction

 It's amazing. One little button. So much effect. dbx? Type III? Noise Reduction is an entirely new concept... virtually instantaneous encode/decode within the circuitry of the box. We started out to build the finest EQs possible, boxes with the heritage and performance to rival our famous 30 Series EQs. And to no one's surprise they came out awfully darn good. (Ask to see the Audio Precision plots compared to the competition.) But then, Roger (our chief engineer, a nice guy, as far as engineers go) got the crazy idea of putting this new noise reduction stuff in the box. We listened to it and were amazed. The EQs sounded great without it but with it the performance was nothing short of incredible. Check it out yourself and see.

But hey, Roger wasn't about to stop there. PeakPlus? Limiter. Who knows more about limiting than the folks at dbx; nobody... that's who. So when the guys were developing this new series of EQs they wanted something that would be unique to these EQs. That's when Roger got another one of his bright ideas and said "I bet they'll work a lot better if there's a cool limiter built in." Next thing you know, all the guys are in the studio amazed at the new limiter Roger had designed specially for the 20 Series. Once again, hearing is believing... With a threshold range of 0dbu to plus 20dbu, the patent-pending PeakPlus limiter is designed to tame your program material from the subtlest nuances to the rowdiest hits. Also, the four stage LED ladder gives you a great visual indication as to what the limiter is doing.

20 Series EQs. You used to have to settle for second best in a reasonably priced EQ but not any more. With the new 20 Series from dbx Professional Products you get a great EQ circuit, a graceful yet powerful limiter and the revolutionary new design of the Type III Noise Reduction. Check out the dbx 20 Series graphic EQs at your pro audio outfitter. You'll see, with the 20 Series EQs you get MORE!!!

SPECIFICATIONS:

* 2 channel 15 2/3 octave band graphic equalizer
* 25Hz - 16kHz frequency control * Constant Q circuitry
(3% frequency accuracy) * Selectable 6dB or 12dB control
* Variable level control * By-pass switch * Overload threshold LED (5dB below clipping) * Ground lift switch * XLR & 1/4" TRS balanced Inputs/Outputs * Power: Selectable 120V/220V voltage
* Dimensions: 1.75" H x 19" W x x 8.5" D / 44.5mm x 483mm x 216mm - 1 space r.m. * Weight: 4.5 lbs. / 2.5kg

XEQ-152 Specifactions:
* Input type: Active balanced / Unbalanced * Output Impedance:

Digital stereo active crossover with 4 inputs and 8 outputs, incl. software .

• Flexible routing configurations for all standard mono and stereo output operating modes
• 4 analog inputs and 8 analog outputs (XLR)
• Active frequency filter types (Bessel, Butterworth and Linkwitz-Riley) with slopes up to 24 dB/octave split up the audio signal into different frequency bands
• Incl. software editor (for PC and Mac) for remote control via computer through USB interface: store, transfer, and manage your presets
• Up to 30 user presets storable in the device via software
• 5 menu languages selectable (German, English, French, Spanish, Dutch)
• Alphanumeric LCD screen with 2 lines of 16 characters each
• Input sensitivity digitally adjustable
• Inputs and outputs with 4-digit LED level meter as well as clip and limit LED indicator
• Mute switch with LED indicator per output
• 7-band parametric EQ per output
• Up to 7 ms signal delay adjustable for the outputs
• Output limiter with adjustable limits and automatic attack and release settings as overload protection for your amplifying system
• Switchable phase
• Lock function for prevents undesired changes to settings
• Rack installation, 1 U
• Windows XP, Vista, 7, 10 and Mac OS X 10.5.8 and better
• Digital signal processor
• The device can be connected via USB to the PC in connection with DXO Software The firmware can be updated via the PC connection
• (19") 48.3 cm rack installation 1 U

• Professional 31-band stereo graphic equalizer for live and studio applications
• Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer
• Ultra-low noise 4580 operational amplifiers for highest signal integrity
• Dedicated mono subwoofer output with adjustable crossover frequency
• Additional sweepable high and low-cut filters for each channel remove unwanted frequencies, e.g. floor rumble, hiss etc.
• Highly accurate 12-segment LED input/output metering and input gain controls for easy level setting

• Relay-controlled hard-bypass with an auto-bypass function during power failure (fail-safe relay)
• Servo-balanced inputs and outputs with 1/4" TRS and gold-plated XLR connectors
• “Planet Earth" switching power supply for maximum flexibility (100 - 240 V~), noise-free audio, superior transient response plus low power consumption for energy saving
• 3-Year Warranty Program*
• Conceived and designed by BEHRINGER Germany

The class-A circuit used in the EQ-73 is similar to the eq section in the classical 1073 module, without the high pass filter. Additional frequencies have been added and the mid frequency band uses two inductors, the higher value of the second one is used for the two lowest frequencies, 160 Hz and 240 Hz, to achieve a suitable response.

The sound character is warm, punchy, sweet and musical. These classic characteristics have been heard on countless recordings through the years and it is a versatile sound that works very well on most sound sources and in most genres. The essence of this sound is now available at a surprisingly low cost, making it available to nearly everyone.

The EQ-73 has stepped frequency controls that offers a wide selection of frequencies from 20 Hz to 24 kHz.

The Low and High frequency bands are shelving and the mid frequency band is of the bell type.

The control range is +/-15 dB for the two lower bands and +/- 18dB for the high frequency band.

There are separate bypass switches for all three bands.

The EQ-73 is made to be used together with one of our PRE-73 models that has an Insert jack. It can also be used with many other units that has a low level insert jack.

Combining a PRE-73 and an EQ-73, and using a UNITE rack kit to mount them together, one will get a 19-inch 1073-style unit at a low cost and with a great sound!

FEATURES

- Vintage Style electronics. No intergrated circuits in the signal path

- 3-band with a dual inductor based mid frequency band

- Stepped frequency selection

- A wide selection of frequencies from 20 Hz to 24 kHz

- Control range up to +/- 18 dB

- Separate Bypass switches for each band

- Tantalum capacitors in the signal path

- Made to be used together with one of our PRE-73 models with an Insert jack or any other unit with a low level Insert jack

- TRS jack for in-and output connection, the nominal working level is around 18 dBu

- Selectable ground lift switch

- External power supply to avoid interaction with the audio circuits

- Great sound that suits most sound sources and genres

- A solid build quality that will last many years of normal use