BEHRINGER FBQ800 Ultra-Compact 9-Band Graphic Equalizer with FBQ

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The MINIFBQ FBQ800 features Behringer’s FBQ Feedback Detection System that instantly reveals critical frequencies and can also be used as an audio analyzer. An additional low cut filter removes unwanted frequencies such as floor rumble. Accurate 6-digit LED input/output meters and level control are provided for precise level indication. Long-term reliability is guaranteed with Behringer’s […]

 

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The MINIFBQ FBQ800 features Behringer’s FBQ Feedback Detection System that instantly reveals critical frequencies and can also be used as an audio analyzer. An additional low cut filter removes unwanted frequencies such as floor rumble. Accurate 6-digit LED input/output meters and level control are provided for precise level indication. Long-term reliability is guaranteed with Behringer’s high-quality illuminated faders, potentiometer and illuminated switches. The ultralow noise audio operational amplifiers offer outstanding sound performance. In addition, all Mini Series models can be stacked on top of each other to create an ultra-compact signal processing solution.

How Does it Work?
Imagine the frequency range of the sound you hear as a highway, a very wide one with nine lanes. Each of these “lanes” represents a single octave of the sonic spectrum. The first four lanes, labeled 63 – 500 (Hz) contain the really low frequency sound content, mainly bass, bass vocals, and the kick and tom drums. The three lanes labeled 1k, 2k and 4k (Hz), make up the fundamental zone of most musical instruments and the male and female vocals. 8k and 16k cover the frequency range of cymbals, snare drums and higher pitched percussion instruments. The FBQ800 allows you to control the flow of audio traffic in each of these nine lanes. When properly applied, EQ makes it possible to hear all of these frequency ranges equally, thus the term equalization.

Feedback Elimination
When a specific frequency, or range of frequencies, reaches too high a level, feedback occurs—that all-too-familiar squeal or howl you get when the mic is too close to the speaker. Basically, feedback happens when there is so much of a particular frequency that it is picked up by the mic and run through the system again. Thatʼs why feedback typically gets louder and louder the longer itʼs allowed to occur. Needless to say, this kind of feedback is very undesirable.

This is where the FBQ800ʼs Feedback Detection System really works its magic. In this ingenious circuitry, LEDs on the individual faders light up when that frequency band is approaching the danger zone. All you need do is lower the illuminated slider until the LED blinks out—voilà, feedback problem solved! What once required a highly trained ear is now an activity that even a child can master.

Sonic Toolkit…
That really is the best way to describe the FBQ800. With its nine frequency bands, you easily fine-tune your sound and instantly eliminate feedback. And each fader can be used to boost or cut the frequency range it controls by as much as 12 dB (and thatʼs a lot!).

Special attention is paid to the low frequency zone. In addition to low frequency faders, the FBQ800 features a Low Cut filter for removing unwanted low frequencies such as floor rumble, room resonance, electrical hum, etc. This is especially handy if your system is being used for speech rather than music.

To Boost or to Cut, That is the Question
Raising and lowering specific frequency bands can improve the frequency response of any roomʼs acoustics. For instance, if the room youʼre in is “bass-heavy,” lowering the 63 and 125Hz faders can help eliminate an overall “boomy” or “muddy” sound. Likewise, gently boosting the 8 and 16k sliders can add sparkle to a somewhat “dark” mix. Are the vocals getting lost in the mix? Raising the level of the 1k slider can help bring them out.

Itʼs important to note that raising a single fader level is not always the best solution; itʼs often better to lower the bands surrounding the frequency you want to bring out, and then boost the overall volume level to achieve better headroom.

Built for Accuracy and Reliability
Speaking of headroom, FBQ800ʼs 6-digit LED I/O meters and level control are provided for precise level maintenance. Long-term reliability is ensured, thanks to high-quality illuminated faders and switches, and our ultra low-noise audio operational amplifiers provide outstanding sonic performance. In addition, all Mini Series components can be stacked to create an ultra-compact signal processing solution.

Mini Series mixer with built-in feedback detection.

FEATURES

  • Ultra-compact 9.5″ graphic equalizer for studio and stage applications
  • FBQ Feedback Detection system instantly reveals critical frequencies
  • Additional Low-cut filter removes unwanted frequencies, like floor rumble
  • 6-segment LED input/output meters and Level control for precise level indication
  • High-quality illuminated faders, potentiometers and illuminated switches
  • Low noise audio operational amplifiers offer excellent sound performance

SPECIFICATIONS

MINIFBQ FBQ800 9-Band Graphic Equalizer with FBQ

  • INPUT
  • Type 1/4″ TRS connectors (balanced) or
  • RCA connectors (unbalanced)
  • Impedance approx. 20k ohms, balanced
  • approx. 10k ohms, unbalanced
  • CMRR 40 dB typ. @ 1 kHz
  • Max. input level +15 dBu
  • OUTPUT
  • Type 1/4″ TS connectors (unbalanced) or
  • RCA connectors (unbalanced)
  • Impedance approx. 120 ohms
  • Max. output level +15 dBu
  • SYSTEM SPECIFICATIONS
  • Frequency response 10 Hz to 200 kHz, -3 dB
  • Dynamic range 110 dB, 10 Hz to 22 kHz
  • Distortion 0.003 % typ. @ 0 dBu
  • Crosstalk
  • Signal-to-noise ratio 10 Hz – 22 kHz
  • GRAPHIC EQUALIZER
  • Type 9 analog stereo bands
  • Control range ±6 dB or ±12 dB, switchable
  • Bandwidth 1 oct.
  • OTHER FEATURES
  • Low-cut filter 75 Hz (12 dB/oct.)
  • Input level control -12 dB to +12 dB
  • POWER SUPPLY
  • Mains connection external power supply
  • 9 V ~ / 750 mA
  • Mains voltage
  • DIMENSIONS/WEIGHT
  • Dimensions (H x W x D) approx. 1 8/9″ (48 mm) x 9 5/9″ (243 mm) x 4 5/7″ (120 mm)
  • Weight approx. 0.86 lbs. ( 0.39 kg)
Weight 0.40 kg

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Quick Comparison

BEHRINGER FBQ800 Ultra-Compact 9-Band Graphic Equalizer with FBQ removeDBX 2215 Dual 15-Band Graphic Equalizer with Noise Reduction removeDBX 1215 2X12 BAND GRAPHIC EQUALIZER removeOMNITRONIC DXO-48E Digital Controller - stereo active crossover 4 inputs - 8 outputs, incl. software removeDBX IEQ15 DUAL 15-BAND GRAPHIC EQUALIZER removeAVALON AD2055 DUAL MONO PURE CLASSA PARAMETRIC MUSIC EQUALIZER remove
NameBEHRINGER FBQ800 Ultra-Compact 9-Band Graphic Equalizer with FBQ removeDBX 2215 Dual 15-Band Graphic Equalizer with Noise Reduction removeDBX 1215 2X12 BAND GRAPHIC EQUALIZER removeOMNITRONIC DXO-48E Digital Controller - stereo active crossover 4 inputs - 8 outputs, incl. software removeDBX IEQ15 DUAL 15-BAND GRAPHIC EQUALIZER removeAVALON AD2055 DUAL MONO PURE CLASSA PARAMETRIC MUSIC EQUALIZER remove
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SKUE005289DBX 2215DBX 1215DXO-48EDBX IEQ15AD2055
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Description
  • 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
ContentThe MINIFBQ FBQ800 features Behringer's FBQ Feedback Detection System that instantly reveals critical frequencies and can also be used as an audio analyzer. An additional low cut filter removes unwanted frequencies such as floor rumble. Accurate 6-digit LED input/output meters and level control are provided for precise level indication. Long-term reliability is guaranteed with Behringer's high-quality illuminated faders, potentiometer and illuminated switches. The ultralow noise audio operational amplifiers offer outstanding sound performance. In addition, all Mini Series models can be stacked on top of each other to create an ultra-compact signal processing solution. How Does it Work? Imagine the frequency range of the sound you hear as a highway, a very wide one with nine lanes. Each of these "lanes” represents a single octave of the sonic spectrum. The first four lanes, labeled 63 - 500 (Hz) contain the really low frequency sound content, mainly bass, bass vocals, and the kick and tom drums. The three lanes labeled 1k, 2k and 4k (Hz), make up the fundamental zone of most musical instruments and the male and female vocals. 8k and 16k cover the frequency range of cymbals, snare drums and higher pitched percussion instruments. The FBQ800 allows you to control the flow of audio traffic in each of these nine lanes. When properly applied, EQ makes it possible to hear all of these frequency ranges equally, thus the term equalization. Feedback Elimination When a specific frequency, or range of frequencies, reaches too high a level, feedback occurs—that all-too-familiar squeal or howl you get when the mic is too close to the speaker. Basically, feedback happens when there is so much of a particular frequency that it is picked up by the mic and run through the system again. Thatʼs why feedback typically gets louder and louder the longer itʼs allowed to occur. Needless to say, this kind of feedback is very undesirable. This is where the FBQ800ʼs Feedback Detection System really works its magic. In this ingenious circuitry, LEDs on the individual faders light up when that frequency band is approaching the danger zone. All you need do is lower the illuminated slider until the LED blinks out—voilà, feedback problem solved! What once required a highly trained ear is now an activity that even a child can master. Sonic Toolkit… That really is the best way to describe the FBQ800. With its nine frequency bands, you easily fine-tune your sound and instantly eliminate feedback. And each fader can be used to boost or cut the frequency range it controls by as much as 12 dB (and thatʼs a lot!). Special attention is paid to the low frequency zone. In addition to low frequency faders, the FBQ800 features a Low Cut filter for removing unwanted low frequencies such as floor rumble, room resonance, electrical hum, etc. This is especially handy if your system is being used for speech rather than music. To Boost or to Cut, That is the Question Raising and lowering specific frequency bands can improve the frequency response of any roomʼs acoustics. For instance, if the room youʼre in is "bass-heavy,” lowering the 63 and 125Hz faders can help eliminate an overall "boomy” or "muddy” sound. Likewise, gently boosting the 8 and 16k sliders can add sparkle to a somewhat "dark” mix. Are the vocals getting lost in the mix? Raising the level of the 1k slider can help bring them out. Itʼs important to note that raising a single fader level is not always the best solution; itʼs often better to lower the bands surrounding the frequency you want to bring out, and then boost the overall volume level to achieve better headroom. Built for Accuracy and Reliability Speaking of headroom, FBQ800ʼs 6-digit LED I/O meters and level control are provided for precise level maintenance. Long-term reliability is ensured, thanks to high-quality illuminated faders and switches, and our ultra low-noise audio operational amplifiers provide outstanding sonic performance. In addition, all Mini Series components can be stacked to create an ultra-compact signal processing solution. Mini Series mixer with built-in feedback detection. FEATURES
  • Ultra-compact 9.5" graphic equalizer for studio and stage applications
  • FBQ Feedback Detection system instantly reveals critical frequencies
  • Additional Low-cut filter removes unwanted frequencies, like floor rumble
  • 6-segment LED input/output meters and Level control for precise level indication
  • High-quality illuminated faders, potentiometers and illuminated switches
  • Low noise audio operational amplifiers offer excellent sound performance
SPECIFICATIONS MINIFBQ FBQ800 9-Band Graphic Equalizer with FBQ
  • INPUT
  • Type 1/4" TRS connectors (balanced) or
  • RCA connectors (unbalanced)
  • Impedance approx. 20k ohms, balanced
  • approx. 10k ohms, unbalanced
  • CMRR 40 dB typ. @ 1 kHz
  • Max. input level +15 dBu
  • OUTPUT
  • Type 1/4" TS connectors (unbalanced) or
  • RCA connectors (unbalanced)
  • Impedance approx. 120 ohms
  • Max. output level +15 dBu
  • SYSTEM SPECIFICATIONS
  • Frequency response 10 Hz to 200 kHz, -3 dB
  • Dynamic range 110 dB, 10 Hz to 22 kHz
  • Distortion 0.003 % typ. @ 0 dBu
  • Crosstalk
  • Signal-to-noise ratio 10 Hz - 22 kHz
  • GRAPHIC EQUALIZER
  • Type 9 analog stereo bands
  • Control range ±6 dB or ±12 dB, switchable
  • Bandwidth 1 oct.
  • OTHER FEATURES
  • Low-cut filter 75 Hz (12 dB/oct.)
  • Input level control -12 dB to +12 dB
  • POWER SUPPLY
  • Mains connection external power supply
  • 9 V ~ / 750 mA
  • Mains voltage
  • DIMENSIONS/WEIGHT
  • Dimensions (H x W x D) approx. 1 8/9" (48 mm) x 9 5/9" (243 mm) x 4 5/7" (120 mm)
  • Weight approx. 0.86 lbs. ( 0.39 kg)

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:

 

 INPUT

Connectors:

 1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip

Type:

Electronically balanced/unbalanced, RF filtered

Impedance:

Balanced 40k ohm, unbalanced 20k ohm

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 2k or greater
 >+18dBm balanced/unbalanced (into 600)

SYSTEM PERFORMANCE

Bandwidth:

20Hz to 20kHz, +/-0.5dB

Frequency Response:

50kHz, +0.5/-3dB

Noise Reduction In:

 (+/-6 and +/-15dB range):

Signal-to-Noise:

 >102dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth

Dynamic Range:

 >120dB, unweighted

Noise Reduction Out:

 (+/-6dB range):

Signal-to-Noise:

 >94dB, unweighted, ref: +4dBu, 22kHz measurment bandwidth

Dynamic Range:

 >112dB, unweighted

Noise Reduction Out:

 (+/-15dB range):

Signal-to-Noise:

 >90dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth

Dynamic Range:

 >108dB, unweighted

THD + Noise:

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

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
Power supply: 100-240 V AC, 50/60 Hz 6 V DC 800 mA
Power connection: Mains input via Coaxial power connector (M) power supply cord with AC adapter (provided)
Frequency range: 10 - 22000 Hz
THD: <0,005 % at 1 kHz
DSP: Digital signal processor
Crossover frequency: 20-20000 Hz
Impedance: Input 10 kOhm Output 50 Ohm
Gain: Output: -50 dB to +12 dB
Filter: Linkwitz-Riley; Butterworth; Bessel; 6db/oct; 12db/oct; 18db/oct; 24db/oct
Delay: 0 - 7 ms
Dynamic range: Input: 114 dB Output: 110 dB
Sample rate: 48 kHz
Connections: Input: line via 4 x 3-pin XLR Output: line via 8 x 3-pin XLR
Max. level: Input: +22 dBu Output: +9 dBu
USB port: Typ B
PC connect: DXO Software via USB, firmware can be updated
Housing design: (19") 48.3 cm rack installation 1 U
Dimensions: Width: 48,3 cm Depth: 22,3 cm Height: 4,45 cm
Weight: 1,90 kg
 

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

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) 

Weight0.40 kg4.30 kg2.00 kg2.25 kg3.86 kg13.60 kg
DimensionsN/AN/AN/A52.5 × 25 × 8 cmN/AN/A
Additional information
Weight 0.40 kg
Weight 4.30 kg
Weight 2.00 kg
Weight 2.25 kg
Dimensions 52.5 × 25 × 8 cm
Weight 3.86 kg
Weight 13.60 kg