CTA Digital PSSPK Psp Attachable Speake CTA Digital PSSPK PSP Attachable Speaker. The PSP sound wave is the perfect attachable speaker for your PSP console. It has specially designed sound chambers that creates theater sounding surround sound from just two speakers. Its amplifier uses its own power source so you do not have to worry about battery drain to your PSP. Its foldable design makes it perfect for travel and optimum convenience. Easily secured and locked onto the PSP by inserting the top of the sound waves extended hooks into the 2 circular top slots of the PSP, then clipping the bottom of the sound wave by pushing it towards the back of the PSP.