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Avalon AD2055

Dual Mono, Pure Class A Parametric Music Equalizer

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 DS servo loop control eliminates the need for all interstage capacitor coupling. The AD2055 breathes life into all musical performances! 

TECHNICAL SPECIFICATIONS 

  • Circuit Topology: High-voltage 100% discrete, balanced and symmetrical Class A 
  • Output Gain Rage: Unity Gain 
  • Maximum Input Level: +30dB balanced XLR pin 2 hot 
  • Maximum Output Level: +32dB balanced 600Ω, 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: 13.6Kg (30lbs) 
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KEM Systems Ltd
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