Check the listing for details. Dynavox Amp-S MKII Amplifier/Speaker Switch Black. Color: Black, Condition: New, Made in China. Listed at 96.96 USD. The AMP-S MKII offers the option of switching between two pairs of speakers when operating a HiFi amplifier Conversely, this switch also offers the option of switching between 2 different HiFi amplifiers with a pair of speakers. The AMP-S MKII is the same as its predecessor, the AMP-S, except that it has deeper banana sockets (˜15 mm) to better manage heavy speaker cables. In addition, the AMP-S MKII has been given a larger cross-section (2.5 mm²) in the internal wiring for even better signal transmission. In a sturdy metal housing and with a solid 4mm aluminum front panel, the AMP-S MKII fits beautifully with your hi-fi components. A high-quality switch (ground is also switched) protects your devices from short circuits by setting it to zero. A very low contact resistance, as well as sol.