EQ-A is a versatile audio plugin that brings the classic British EQ from the '70s to your iPhone. Developed by RRS OOO, this multimedia app is available as a free time-limited demo version, allowing you to try it out for 5 minutes. If you want unlimited access, you can opt for the in-app purchase.

With EQ-A, you get a precise port of the Rack Extensions plugin, offering a wide range of tonal variations. The plugin features four bands of classic British equalization, with the mid frequency EQ sections being "peaking" and the high and low frequency sections being "shelving." Each band provides four selected frequency centers, allowing you to fine-tune your audio.

In addition to the EQ bands, EQ-A offers three high pass filters at 18 dB per octave and three low pass filters at 12 dB per octave. These filters can be combined in unique ways, providing distinct cut filter combinations with unusual filter curves.

EQ-A supports standalone and AUv3 plugin modes, giving you flexibility in how you use it. You can choose between stereo, mid, or side EQ modes, and even toggle on/off the saturation feature for added warmth. The plugin also includes undo/redo functionality, A/B comparison, and 2x/4x/8x upsampling.

With its scalable GUI, EQ-A ensures a smooth user experience on your iPhone. Whether you're a professional audio engineer or a music enthusiast, EQ-A is a powerful tool that brings the character of analog processing to the digital world, delivering pristine sound quality.