IAP 4 serves as an excellent preamp-processor-DAC for stereo systems.

Stereo + Center

Adding a center loudspeaker gives a remarkably improved listening experience. Not only do listeners from anywhere in the room hear a precise sound stage, but also the perception of immersion and volume/depth are improved.

Apartment Wall

A three-dimensional sound experience, based on 4 frontal loudspeakers.


An audiophile surround setup without a center loudspeaker.


Enjoy the flexibility of using one or two subwoofers with bass management.

Active Crossovers

Stereo 2-way active cross overs, seamlessly integrated with Illusonic room equalization.