ARX EQ215 DUAL CH 15BAND -CONSTAND Q- GRAPHIC EQUALIZER

Features
New  (Extended Resolution) long-throw faders for maximum control
and resolution, with integrated protective dust cover
New Sweepable High Pass filter 20-200Hz
Ultra low noise and accurate 'Constant Q' circuitry
Balanced Inputs and Outputs on XLR and Jack connectors
Switchable 6dB or 15dB cut and boost
Audio Ground lift switch on rear
Intuitive controls
User friendly layout
...and most of all, flawless performance in any audio environment
 
Sometimes a 10 band Graphic Equalizer isn't enough, but a 30 band EQ is overkill.
Well, for times like these, we've designed the ARX EQ215. It's a dual channel 15
band Graphic Equalizer built to the same exacting standards as our EQ260, but
designed especially for applications where the program material is predominantly
pre-recorded and pre-processed.
Typical applications are, for example, in DJ systems, Karaoke bars, home theatre,
project and budget studio control rooms, and home stereo systems
Delivering flawless professional performance, it takes up minimal rack space being
neatly housed in a compact 2 RU all steel chassis.
Quality you can feel as well as hear
On the EQ215 's front panel, each channel has 15 of our new Extended Resolution long
throw, centre grounding faders, switchable to either ±15dB or ±6dB, for the ideal combination
of high fader resolution and maximum cut and boost. A protective dust cover is also fitted
to each fader.
As well, there is a Gain recovery control with up to +10 dB of gain; a Clip LED to indicate
circuit overload, a sweepable 20-200Hz High Pass filter, and an IN/OUT hardwire bypass
switch which removes the EQ215 completely from the signal path.
Accurate Constant Q Circuitry
Internally, the EQ215 features innovative Constant Q circuitry.
What makes this so good? Well, it means that the graphical representation of the sliders
on the front panel more accurately reflects the changes you are making to the sound, as
compared to the very rough approximation you get with many traditional graphic EQ designs.
In other words, 'what you see is what you get.'
Combine this with the EQ215 's ultra low noise circuitry, and you have an equalizer that is
unsurpassed for total accuracy.Additionally, at the 0dB slider position each filter is, in effect,
removed from the circuit to further enhance the EQ215 's low noise figures.
Balanced Inputs and Outputs
On the rear panel, each channel of the EQ215 has true differential Balanced Inputs and Servo
Balanced Outputs, with both XLR as well as convenient TRS balanced jack connectors.
There is also an audio ground lift switch to isolate the audio ground from the chassis ground.
Universal AC Power
AC power range is a universal 100 to 120V or 220 to 240V AC, and is connected to the unit via
a removable power lead and standard 3 pin IEC connector, with built-in fuse and voltage switch.
When you need superlative, uncompromising audio quality but can't justify the use of a dual 30
band EQ such as the EQ260, we belive the EQ215 is the only graphic equalizer to choose.
With its compact High Density design, clean good looks and precision electronics, the ARX EQ215
will truly enhance any pro audio application.
You'll never compromise on Quality when you choose ARX

T E C H N I C A L || S P E C I F I C A T I O N S
Input Impedance Balanced 20 Kohms, Unbalanced 10 Kohms
Input Headroom + 23 dB
CMRR >55 dB, 20 Hz to 20 KHz
Output Impedance Balanced 300 ohms, Unbalanced 150 ohms
Output Level (Max) + 23 dB
Frequency Response 10Hz to 20KHz ±0.25dB
Signal to Noise ratio -93 dB Unweighted, -98 dB 'A' weighted
Distortion .0035% THD, 0dB, @1KHz
Dynamic Range 116 dB
High Pass Filter Sweepable 20-200Hz
Power Requirements 100/120 V AC, 220/240 V AC, 18VA
Weight 8lbs/3.75Kg
Dimensions19“W x 3½“H x 8“D, 482 x 89 x 205 mm (2 RU)
Input Connector type XLR, Balanced Jack
Output Connector type XLR, Balanced Jack

Front Panel Controls
Each channel has:
15 x 60mm Extended Resolution long throw, centre grounding faders
on ISO standard frequencies, 25 Hz to 20 KHz
Infinity through to +10dB Gain control
LED clipping indicator
Sweepable High Pass filter 20-200Hz
15 or 6 dB EQ Cut/Boost range switch
Hardwire bypass EQ IN/OUT switch
Rear Panel
Balanced Inputs and Outputs, on both XLR and TRS jack connectors.
Audio Ground Lift switch
AC input connector, with voltage switch and fuse. 

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

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:

The AD2055 combines 100% discrete, pure class A signal amplifiers with state-of-
the-art passive and active filter topologies. The AD2055's unique circuitry delivers
very high resolution transient detail at the operational extremes of real world equalization
demands. The AD2055 auto-bias DC servo loop control eliminates the need for all
interstage capacitor coupling. The AD2055 breathes life into all musical performances!
 
AD2055 FEATURES
Pure Class A, 100% discrete design
Smooth musical detail and sonic excellence
Minimum audio signal path
Dual mono operation
Transparent active and passive filter design
High headroom +30dB Very low noise -94dB
Fully balanced inputs and outputs
DC coupled, no transformers in audio path
Switched frequencies in high and low bands
Mid bands use X10 frequency for extended range
Wide bandwidth -3dB 1Hz to 450kHz
Low distortion less than 0.5% THD and IMD
All signal routing with sealed silver relays Conductive
plastic potentiometers for low noise
External 150W toroidal power supply 100% discrete
power supplies for audio path
Long lasting, stainless steel hardware
 
SONIC EXCELLENCE
The Avalon AD2055 Pure Class A music equalizer is the most powerful, low noise
parametric equalizer available today. Designed to optimize absolute signal integrity
and musical performance, the AD2055 combines the best of active and passive filter
topologies with sonic excellence unequaled by lesser designs. The AD2055 is the
perfect solution for two buss music-program equalization, special instrument EQ and
FX applications and ultra high performance mastering studio's.

Features include state-of-the-art, balanced 100% discrete, Pure Class A signal amplifiers,
practical user features and rugged hardware designed to deliver true high performance
audio for many years. 

PASSIVE-ACTIVE FILTER DESIGN
Avalon equalizers feature the unique combination of both active and passive filter EQ designs.
This special combination enables the AD2055 to deliver high speed transient detail at the
operational extremes of real-world equalization demands. The passive high and low bands offer
alternate musical tone range to the full function active parametric mid bands. Passive equalizers
have long been a favorite with music lovers around the world.  Full bodied, powerful (up to +/-32dB,
64dB range !) and sweet frequency selections are the benefits of the passive high-low EQ bands.
The full bandwidth twin mid bands provide variable frequency selection (X10 frequency multipliers
for very wide range), variable Q (width) and amplitude control.

MINIMUM SIGNAL PATH DESIGN
Avalon's advanced true symmetry design offers high-voltage, large headroom, extended bandwidth
and very low noise. The use of 100% discrete, Pure Class A signal amplifiers give the serious music
professional unlimited sonic character and a natural harmonic detail that enhances the program
material and becomes one with the music itself. The Avalon AD2055 breathes life!

AD2055 SPECIFICATIONS
Circuit Topology  High-voltage 100% discrete, balanced and symmetrical
Class A 
Output Gain Range  Unity Gain 
Maximum Input Level  +30dB balanced XLR pin 2 hot 
Maximum Output Level  +32dB balanced 600 ohms, DC coupled, high-current
discrete Class A 
Input / Output Type  XLR type, pin 2 hot balanced 
Noise 20kHz Unweighted  -94dB (EQ in) 
Distortion THD, IMD  0.5% (typical 0.05% at +6dB 1kHz) 
Frequency Response -3dB  1Hz to 450kHz (input band limited) 
Equalizer Type  Passive high and low bands plus two fully parametric mid
bands 
Bypass  Hard-wire relay bypass for equalizer in-out 
Low Band F1  Passive, amplitude to -32dB to +32dB shelf or peak-dip curve 
F1 Frequency Range  Switched 10 position 18Hz, 25, 30, 50, 72, 100, 150, 215,
300, 450Hz 
Mid Band F2  Active, amplitude to -16dB to +16dB peak-dip curve 
F2 Frequency Range  Variable 35Hz to 450Hz (x10) 350Hz to 4k5Hz, Q (width)
0.3 to 3.0 
Mid Band F3  Active, amplitude to -16dB to +16dB peak-dip curve 
F3 Frequency Range  Variable 160Hz to 2k0Hz (x10) 1k6Hz to 20kHz, Q (width)
0.3 to 3.0 
High Band F4  Passive, amplitude to -26dB to +26dB shelf or peak-dip curve 
F4 Frequency Range  Switched 10 position 1k5Hz, 2k5, 3k5, 5k, 7k2, 10k, 12k5,
15k, 20k, 25kHz 
AC-DC Power  External AC supply, 150w toroidal transformer, 4 pin cable 90v
isolated, 
(B2T Power Supply Included)  100-240v selectable 50/60Hz, 150w max 
Dimensions  19 x 3.5 x 12 in (482 x 88 x 305mm) 
Shipping weight  30lbs (13.6 kg) 

* 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:

• Professional 15-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 low-cut filter removes unwanted frequencies, e.g. floor rumble

• Highly accurate 4-segment LED output metering and input gain controls for easy level setting
• 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*
• Designed and engineered in Germany