The API 550B 500 Series 4-Band Equalizer stands tall as a testament to API's storied legacy in audio excellence. Perfectly suited for both seasoned professionals and budding audio enthusiasts, this pair of equalizers is a bridge between the rich, warm tones of yesteryear and the crisp, pristine audio demanded today. API's proprietary 2520 op-amp ensures that each note you tweak is delivered with utmost clarity and headroom, making it a favorite among top-tier audio engineers.

This equalizer doesn't just offer versatility; it’s engineered for precision. With seven selectable frequencies per band, you can fine-tune your soundscape with surgical accuracy while maintaining a musicality that's both engaging and inspiring. The revolutionary "Proportional-Q" design automatically adjusts bandwidth to your settings, ensuring minimal phase shift—keeping your audio pure and authentic.

Whether you're sculpting complex soundscapes or making subtle tonal adjustments, the API 550B's intuitive controls and robust build promise reliability and consistency. Mounted in a durable 500 Series format, it offers long-term flexibility, adapting seamlessly to your evolving studio needs. Dive into the world of API and discover why this equalizer is revered as an industry staple.

Key Features:

• Modular 4-band equalization with seven frequency centers per band
• High-headroom design with +30dB clip level
• API's "Proportional-Q" Control for intuitive bandwidth adjustment
• Legendary API 2520 op-amp for superior sound clarity
• Shelf/peak switching on EQ Band 1 and 4
• Traditional API fully discrete circuit design
• Rugged 500 Series format for long-term adaptability

Product specs

FAQs

What makes the API 550B 500 Series 4-Band Equalizer unique compared to other EQs?

The API 550B features a 4-band semi-parametric EQ with a proportional Q, which means the bandwidth narrows as the gain increases, allowing for precise tonal shaping. Its solid-state design offers classic API sound with a ±12dB boost/cut range.

Is the API 550B suitable for professional studio use?

Yes, the API 550B is designed for professional studio environments, offering high-quality signal processing with its solid-state design and precise EQ control, making it ideal for mixing and mastering applications.

Can the API 550B 500 Series Equalizer be used with a 500 Series rack?

Yes, the API 550B is a 500 Series module and requires a compatible 500 Series rack for operation, allowing it to integrate seamlessly into modular studio setups.

What type of filters does the API 550B include?

The API 550B includes both high pass and low pass filters, providing additional flexibility in shaping the tonal characteristics of the audio signal.

How does the proportional Q feature affect the sound processing of the API 550B?

The proportional Q feature adjusts the bandwidth of each EQ band automatically, narrowing it as the gain is increased, allowing for more precise and musical adjustments to the sound.