P650 speaker kit consists of P650-E, 6.5cm enclosure box + P650K, 6.5cm speaker unit, which is good as entry level products for speaker building hobby. The enclosure box is also able to mount other speaker drivers for enjoying the difference of sound taste. The AP05 (offered by MR-0653 dated May 27th 2013), compact amplifier is a very handy 5W + 5W stereo amplifier ideal to drive the P650 speaker as well as P800 and P1000. The combination of the speaker system and the amplifier is good for desktop audio reproduction from PC audio and portable digital audio player.