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Ashly presents the PQX series parametric equalizers. Like graphic equalizers,
parametrics allow you to boost or cut selected frequencies. However, parametric
equalizers also allow exact adjustment of the frequency and bandwidth of each
band, resulting in very precise control of frequency response. The amplitude,
center frequency, and bandwidth are the "parameters" for each equalizer band
and the term "Parametric" refers to the ability to adjust all of these characteristics
independently
The Ashly PQX series equalizers are a third generation design including many
refinements on our original PQ models. Lower noise, greater headroom, additional
filters, full 20Hz -20KHz range on all parametric filters and additional connector
types are the result.
The heart of the PQX equalizers is a unique bandpass filter circuit. Basically a
“state-variable" type, this filter is trimmed and optimized to provide excellent
transient response and a wide range of frequency and bandwidth adjustment.
Each filter can be tuned over a 100:1 frequency range (about 6.6 octaves) and
a 70:1 bandwidth range with no more than a 2 dB amplitude error at center frequency.
At its sharpest setting, the filter has a "Q" of about 35 and generates a response curve
with 3 dB points only 1/20 octave apart, making feedback control possible with no
audible side effects. Each filter is placed in the feedback loop of a summing amplifier
to produce the desired frequency response. Since a separate summing amplifier is used
for each band, no interaction between bands occurs. After twenty years of refinement,
the Ashly parametrics are the most powerful equalization tool available. They especially
excel in control of resonance and feedback yet also provide smoother broadband tone
shaping than Graphic equalizers.
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5 Fully parametric bands |
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Parametric filters tunable from 20Hz to 20KHz |
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Very low hum and noise design |
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Adjustable bandwidth from 3 1/3 to 1/20 of an octave |
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True reciprocal curves |
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Master and individual band in/out bypass switching |
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Balanced Inputs and Outputs |
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XLR, 1/4" TRS and barrierstrip audio connections |
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Five Year Warranty | | 1231 Dual 31-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 1231 provides standard features like dual-channels, 31 1/3 octave bands, ISO frequency centers, +/- 12 dB input gain range, and switchable 40Hz/18 dB per octave low-cut filters, but also includes other insightful 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 3U steel/aluminum chassis.
SPECIFICATIONS:
INPUT |
Connectors: |
1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip |
Type: |
Electronically balanced/unbalanced, RF filtered |
Impedance: |
Balanced 40 kOhm, unbalanced 20 kOhm |
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 terminal strip |
Type: |
Impedance-balanaced/unbalanced, RF filtered |
Impedance: |
Balanced 200 ohm, unbalanced 100 ohm |
Max Output Level: |
>+21dBu balanced/unbalanced into 2 kOhm or greater
>+18dBm balanced/unbalanced (into 600 ohm) |
SYSTEM PERFORMANCE |
Bandwidth: |
20Hz to 20kHz, +0.5/-1dB |
Frequency Response: |
50kHz, +0.5/-3dB |
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+/-15dB range |
+/-6dB range |
Dynamic Range: |
109dB |
115dB |
Signal-to-Noise: |
90dB |
97dB |
THD + Noise: |
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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)
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iEQ-15 Dual 15-Band Graphic EQ with Type V? NR and AFS?
With an EQ heritage that has produced countless industry standard
patents and dates back more than 30 years, the dbx iEQ-31 easily
lives up to the dbx legacy of uncompromised sonic integrity. In
addition to unsurpassed equalization specs, the iEQ-15 also offers
the built-in necessities which include AFS? feedback Suppression,
Type V? noise reduction and PeakStopPlus? limiting. Besides
including two 15-band channels of 2/3-octave equalization, the iEQ-15
also offers +12 dB input gain range; switchable +6 or +15 dB boost/cut
range, 40mm faders, XLR, 1/4'' and Euroblock inputs and outputs,
nonconductive nylon sliders; and an intuitive user interface with comprehensive
output and gain reduction metering. As always, the inevitable result of our
meticulous attention to detail and top-quality componentry is exceptional
sound, performance, and reliability.
The iEQ series represents a major step forward in the performance of EQs.
The iEQ series is now able to offer state-of-the-art digital EQ performance
and specs with an analog look and feel. From its amazing 10Hz to 22kHz
frequency response, to its 113dB dynamic range and Advanced Feedback
Suppression (AFS?), dbx proprietary Type V? noise reduction
and PeakStopPlus? limiting, the iEQ-15 offers out of this world specifications
with a downto- earth price point. Sure to find a home in the studio, on tour and
with installed sound venues, the iEQ-15 is destined to take its rightful place in
the lineage of great dbx? signal processors that are the professional?s choice
in signal processing. With such pristine design and quality, the iEQ-15 offers
the maximum sonic flexibility in a straight forward interface and rock-solid construction.
? Advanced Feedback Suppression (AFS?)
? Type V? Noise Reduction
? PeakStopPlus? Limiting
? 2/3-octave Constant Q frequency bands
? Switchable boost/cut ranges of ±6 or ±15dB
? 18 dB per octave 40Hz low-cut filter
? ±12dB input gain range
? XLR, TRS and Euroblock Inputs and Outputs
? Internal Toroidal Transformer
? Frequency Response of 10Hz to 22kHz
? Dynamic range of greater than 113dB
? User Power Up Features
? Relay Bypass for Power Failure System Protection
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- 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
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* 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: |
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