Forty years later, the 550A remains the standard against which other EQs are measured and it has played a major role in the recording industry for decades. Still copied but never duplicated, the 550A became API's standard channel module EQ when the company began manufacturing consoles in 1971. With virtually all existing units spoken for, popular demand for this EQ resulted in API finally resuming production in 2004.
The 550A provides reciprocal equalization at 15 points in 5 steps of boost to a maximum of 12dB of gain at each point. The 15 equalization points are divided into three overlapping ranges. The high and low frequency ranges are individually selectable as either peaking or shelving and a band-pass filter may be inserted independently of all other selected equalization settings. Frequency ranges and boost/cut are selected by three dual-concentric switches and a push-button "in" switch allows the EQ to be silently inserted into the signal path. A small toggle switch is used to engage the band-pass filter.
The combination of Walker's incomparable 2520 op-amp, and his "Proportional Q" circuitry gives the 550A user an uncomplicated way to generate acoustically superior equalization.
With the long-awaited reissue of this unit, an EQ that has had such a part in the history of recording is continuing to make history in today's music.
API 550A Three-Band EQ Features
- Three bands of classic API equalization
- Each band offers five API selected frequency centers
- Reciprocal and repeatable filtering
- Maximum 12 dB of boost/cut per band
- EQ bands 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
The includes a 1 Year return to base warranty. This warranty applies to all equipment which has developed a manufacturer defect during application. Please contact us to confirm the availability and lowest price for any product. For quotes and price matching requests, contact us and include the competing website address.
|Condition||Sealed / New|
|Delivered Price||Shown at checkout|
Look no further than AudioDubai when buying gear online in the United Arab Emirates , always at the lowest price with free shipping to all locations serviced by FEDEX UAE. Please contact us for stock availability , price quotes , expedited shipping quotes or to arrange a return of your (for the full purchase price of ). You may return most new, unopened items within 30 days of delivery for a full refund. AudioDubai are very proud to carry a large selection of gear. You demand quality, reliability, and innovative design from your gear, and we're here to help you find exactly what you need. We're glad to answer any questions you have and you can always depend on AudioDubai to give you the best possible value on musical instruments and accessories with responsive customer service.