Many EQs today offer a huge assortment of complex features, but the API 550B provides exactly the right number of controls to the professional engineer. Deceptively simple at first glance, the 550B's four EQ bands are overlapped significantly to aid in dual roles as problem solver and sweetening device. Each band offers seven switchable filter frequencies spanning four to five octaves, selected through experience by a "who's who" list of the industry's most proficient engineers. This re-issue design has been taken from the original blueprints and spec control drawings from the API archives.
Making use of "API Proportional-Q", a design introduced by API in the 60's, the 550B intuitively widens the filter bandwidth at minimal settings and narrows it at higher settings—without the need for additional bandwidth controls. This feature minimizes the "phase-shift" sound found in many equalizers. The reciprocal nature of the 550B enables the user to "undo" what has been done previously.
The benefits of the API 550B are most obvious to those who work with EQ on a continuous basis. The 550B's ability to affect or reverse tonal modifications is perhaps the most important feature. If major tonal restructuring is required, the extraordinary headroom made possible with API's 2520 op-amp offers predictable and gentle "analog" performance under duress. With a surprisingly wide range of tonal variations, you can do no better than the API 550B.
API 550B Four-Band EQ Features
- Four bands of famous-sounding equalization
- Each band offers seven API-selected frequency centers
- Reciprocal and repeatable filtering
- 12 dB of boost/cut per band
- EQ bands 1 and 4 offer shelf/peak switching
- "Proportional Q" narrows filter Q at extremes
- Traditional API fully discrete circuit design
- High headroom: +30 dB clip level
- Re-issue of 1967 API 550 EQ with an extra band
All payments are processed securely by Paypal , offering both buyer and seller protection. Online orders are confirmed in stock and ready to ship before Paypal payment is completed. orders ship FEDEX and will require signature upon delivery. Orders are typically delivered within 4-5 business days following dispatch. Fedex tracking details are provided for all orders.
All imported musical instruments into Singapore are not subject to duty. Generally, all goods imported into Singapore are subject to GST whether they are dutiable or not. GST is calculated on the CIF value plus the duty payable (if any) at the point of importation (Based on the total price of ). Products of a total value not exceeding SGD 400 on the CIF value may be imported without payment of duty and/or GST.
Customs import tax/duty rate chart based on previous imports into Singapore (3%)
|Order Value||Tax (Approx)||Delivered|
|SGD S$200||SGD S$0||SGD S$0|
|SGD S$500||SGD S$15||SGD S$515|
|SGD S$1000||SGD S$30||SGD S$1030|
|SGD S$3000||SGD S$90||SGD S$3090|
|SGD S$6000||SGD S$180||SGD S$6180|
- Buy products with confidence.
- We ship to all major regions in Singapore.
- Return to base repair or replacement (1 Year return to base).
- Please contact us for detailed information about our terms , conditions and warranty.
AudioBuy Singapore ship all stocked orders Monday to Friday. All online orders are carefully packed and insured before dispatch. Our customers are very important to us and we will work with you until final delivery to ensure you're completely satisfied.
|Condition||Sealed / New|
|Delivered Price||Shown at checkout|
Look no further than AudioBuy when buying gear online in Singapore , always at the lowest price with free shipping to all locations serviced by FEDEX. 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. AudioBuy Singapore 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 AudioBuy Singapore to give you the best possible value on musical instruments and accessories with responsive customer service.