Summit Audio EQP-200B Tube Equalizer

Summit Audio

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Product Code: 1274
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The Summit Audio EQP-200B Tube Equalizer uses tube and solid state technologies to produce the warm sounds associated with tubes while providing the reliability of solid state devices. Based on a Pultec type design, the EQP-200B is a very musical sounding passive equalizer followed by a vacuum tube amplifier to overcome any gain loss.

The Summit Audio EQP-200B Tube Equalizer is two independent equalizers. The circuit has an electronically balanced input stage that is followed by a passive equalizer. The function of the equalizer can be thought of as three different sections. These are: a low frequency attenuate and boost section, a high frequency boost section that has an adjustable bandwidth, and a high frequency attenuate section.

This type of equalizer is made of resistors, capacitors and inductors. The equalizer has approximately a 20dB gain loss which must be overcome. This gain loss is overcome by the vacuum tube amplifier. The equalizer circuit feeds the first stage of the tube amplifier and the second stage of the amplifier has a cathode follower for low output impedance. The cathode follower drives the discrete 990 output stage. The tubes are operated class A with negative feedback. The power supply is all solid state and regulated. The tube heaters are D.C. operated.

Passive EQ

Coveted by top professionals for decades, passive EQs have better phase coherence than active designs, and the inductors offer a rich, smooth harmonic quality.

Track, Mix, Master

The Summit Audio EQP-200B is an indispensable component to many key task's in the studio. From tracking to final touches and audio sweetening, the Summit Audio EQP-200B is the goto EQ!

Take the buss!

The Summit Audio EQP-200B is the perfect finishing tool for any mix - just insert it across the master buss of your mixing console or DAW. The sonic benefits from the Summit Audio EQP-200B's exceptional passive tube circuit are apparent even with the EQ circuit in bypass mode.

Hand-crafted in the USA

Each piece of Summit gear is meticulously crafted by hand in Summit Audio's shop using only the best quality components and attention to detail. Quality components and engineering know-how are the critical element to the sound and longevity of audio gear.

Summit Audio EQP-200B Tube Equalizer Features

  • Two independent channels
  • Switch selectable frequencies
  • Passive I/O circuits
  • In/out/shelf switch
  • Extended frequencies and LF shelf
  • 105 dB dynamic range
  • 990 output stage (balanced or unbalanced)
  • Transformerless signal path
  • Hand crafted in the USA

Summit Audio EQP-200B Tube Equalizer Specifications

  • Operating Measurements:
    • Frequency Response:
      • Tube: 12Hz-45kHz -0.5dB
    • Signal to Noise Ratio:
      • Tube: 125dB average 20Hz-20kHz
    • THD + Noise:
      • Tube: 0.057% 12Hz-20kHz
      • Vacuum Tubes: Three 12AX7A
  • Max Level:
    • Max Input Level (XLR): +23dB
    • Max Output Level (XLR): +23dB
    • Max Gain: +/-20dB
  • Selectable Frequencies:
    • Low Frequency Shelf / In / Out:
      • 3 position togle: 6 dB per octave shelving filter starting at 50 Hz, or standard engaged operation, or bypass mode
    • Low Frequency Boost and Cut:
      • 20, 30,60, 100, 180 Hz frequencies
    • Mid-High Frequency Boost and Cut:
      • 1.5k, 3k, 5k, 8k, 10k, 12k, and 16k Hz frequencies
    • High Frequency Cut:
      • Select at 5k, 10k and 20k Hz frequencies
  • Connections:
    • Inputs: +4 dB female XLR (2)
    • Outputs: +4 dB male XLR (2)
  • Power Configuration:
    • Internal AC Supply
    • 35 watts, 115 or 230 volts, 50 or 60 Hz (Rear Switchable)
    • Fuse Size: 0.5 Amp for 115 VAC, 0.25 Amp for 230 VAC
  • Size and Weight:
    • Height: 3.5 inches (8.89 cm)
    • Width: 19 inches (48.26 cm)
    • Depth: 10 inches (25.40 cm)
    • Weight: 17 pounds (7.71 kg)

Summit Audio EQP-200B Tube Equalizer Includes

  • EQP-200B Tube Equalizer Unit
  • Operating Manual
  • 3 Year Warranty

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