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API 550ASW EQ

500 Series Saul Walker Edition Discrete Classic 3 Band EQ
Part No: API-550ASW

This limited edition EQ is a continuation of the equalizers produced by API exactly as they were in the 1960's, featuring hand-wired switches, the original circuit board design and API founder Saul Walker's signature on the chassis. 

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£2,299.00 £1,915.83 ex VAT
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£2,299.00 £1,915.83 ex VAT
 
API

Product Description

Details

This limited edition EQ is a continuation of the equalizers produced by API exactly as they were in the 1960's, featuring hand-wired switches, the original circuit board design and API founder Saul Walker's signature on the chassis. 

The 550A Saul Walker Edition uses the same circuitry as the current reissue of the API 550A. Few equalizers enjoy the respect and admiration of the coveted API 550A. Designed by the now legendary Saul Walker in the late 60's, the discrete 550A was first used as a modular OEM equalizer. As the industry rapidly embraced the sonic quality of the 550A, it quickly found it's way into many custom console designs by Frank DeMedio and other leading engineers. Many of these consoles are still in use today.

Features

  • 3 bands of classic API equalization
  • Each band offers 5 API selected frequency centers
  • Reciprocal and repeatable filtering
  • Maximum 12 dB of boost/cut per band
  • EQ Band 1 and 3 offer shelf/peak switching
  • "Proportional Q" narrows filter Q at extremes
  • Traditional API fully discrete circuit design
  • High headroom +30 dB clip level

Specifications

Additional Information

Specification

Input Impedance:

  • 66 kO high level
  • 17 kO low level

Output Impedance: Less than 85O (transformer isolated)

Nominal Operating Level: –15 dBm to +12 dBm

Insertion Loss: None (bridging)

Frequency Response, Unequalized: ±0.5 dB 30 Hz to 20 kHz

Noise: Unequalized, output noise of –90 dBm, high level strapping and –98 dBm, low level strapping, 20 Hz to 20 kHz unweighted

Distortion:

  • .05% THD max, 30 Hz to 20 kHz @ +4 dBm
  • .07% THD max, 30 Hz to 20 kHz @ +18 dBm

Clipping Level (3% THD): +30 dBm

Power Requirement: ±15 volts to ±18 volts @ 70 ma

Controls:

  • Dual Concentric Rotary: LF select: 50, 100, 200, 300, 400 Hz and stepped degree of equalization -12 dB to +12 dB
  • Dual Concentric Rotary: MF select: 400, 800, 1500, 3000,
  • 5000 Hz and stepped degree of equalization -12 dB to +12 dB
  • Dual Concentric Rotary: HF select: 5000, 7000, 10,000, 12,500,
  • 15,000 Hz and stepped degree of equalization -12 dB to +12 dB
  • All equalization is in steps of 2, 4, 6, 9 and 12 dB either plus or minus

Toggle Switch:

  • 50 Hz to 15 kHz band-pass filter In or out
  • Push Button: LF range Peak or Shelf
  • Push Button: HF range Peak or Shelf
  • Push Button: Equalization In or Out
  • Tally light when In

Connector: 30 pin PC connector supplied


Dimensions and Weight

  • Size: 1.5" X 5.25" X 7.5" Deep
  • Size (Boxed for Shipping): 4.5" X 6.25" X 10.25"
  • Actual Weight: 1.93 lbs.
  • Shipping Weight: 2.37 lbs.

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