Avalon AD2055

Dual Mono, Pure Class A Parametric EQ Daily Rate: $100

Features | Technical Specifications | Support

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!
 

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

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TECHNICAL 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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SUPPORT DOCUMENTS, DOWNLOADS AND MANUALS:

• Avalon AD2055 (PDF, 809.5 M)

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