The Tozzi One speaker kit is likely the easiest speaker kit on the market. I assembled it in an hour, half of which was spent looking for my tools, and cleaning up. This is the perfect kit for beginners as there is no soldering involved - all you need is a screwdriver.
The kit costs USD 395 per pair if purchased direct from the manufacturer, but it can sometimes be found cheaper from other merchants.
Based on their in-house CHN 50 full-range driver, the Tozzi One is built around an ABS and fiber-reinforced cabinet.
The driver is mounted in a shallow wave-guide, while the cabinet is rear-ported. Sensitivity is rated at 85 dB, and impedance at 6 ohms. The anechoic frequency response is specified at 80 Hz - 22 kHz (+/- 6 db). The cabinet measures 200 x 126 x 200 mm, and weighs 1.42 kg. The cabinet is angled up slightly, so you should be fine listening to it in the near-field while placed on your desk.
The waveguide has a textured finish, while the sides of the cabinet are finished in a faux leather wrap.
Assembly is straightforward enough. The instructions were in Japanese, but the diagram is clear enough to figure out.
A thin gasket is placed between the front baffle and the speaker driver. The driver is held in place with five hex nuts. The supplied wiring is terminated in push-on terminals and o-rings, so you just need to connect them to the speaker driver and supplied five-way binding posts. The rear panel foam needs to be affixed using the supplied double-sided tape. Install the gasket into the rear panel groove, and attach it to the speaker cabinet with screws. That's it! Building and programming a custom keyboard is far more challenging than this.
The beauty of full-range driver designs is that there is no crossover to mess around with. From a technical viewpoint, you get the best possible coherence from using a single driver and higher efficiency and purity from skipping the passive crossover. There is no free lunch though. Asking a driver to cover the whole frequency range results in uneven response. Most designs have to rely on complex cabinet designs with some form of a back-loaded horn to get usable bass output.