Is the Quantum MK2 worth it over the original Quantum?

The MK2 adds a larger touchscreen, more sample memory and an updated keybed with polyphonic aftertouch. If you already own the original and do not need those, the upgrade is less compelling; for new buyers the MK2 is the better long-term choice.

How does it compare with the Waldorf Iridium Keyboard?

Both share Waldorf's hybrid synthesis approach. The Quantum MK2 has the full-size 61-key Fatar keybed, analog filters and a larger panel, while the Iridium Keyboard is more compact and desktop-friendly. Choose the Quantum for studio centerpiece use and the Iridium for space and portability.

Can it sample external audio?

Yes. It has a stereo audio input and 24-bit sampling, so you can record external sources and process them through the engine in real time.

Does it have aftertouch?

Yes. The 61-key Fatar TP/8SK keyboard supports polyphonic aftertouch, which you can route to modulation targets.

How many voices does it have?

The Quantum MK2 is polyphonic, but the voice count depends on the oscillator modes in use; granular and resonator modes are more demanding than simple wavetable patches.

You get the synthesizer and its power cable. It has no built-in speakers, so you need an amp or monitors, and MIDI and USB-B are provided for connecting other gear.