Phil Jones designed a custom Rectangular Auxiliary Low Frequency Radiator (RALFR®). It also reduces the cone excursion of the speakers, allowing greater power handling.
The proprietary PJB NeoPower 4-inch speakers have full frequency range to the highest audio frequencies. Not only does this give greater clarity and transparency to your instrument, but also a high-fidelity sound to any backing track fed into the auxiliary input.
The cabinet may be as small as a shoe box, but it is built to the same standards of all PJB cabinets, heavily braced internally and damped with acoustic damping materials to prevent cabinet coloration that can kill the true sound of your instrument. What you hear from the NANOBASS is the closest you can get to how your instrument actually sounds.
Audio front end on the Amp system of NANOBASS is one ADC chip PCM1861 from Texas Instrument. With special configuration, the ADC is running at 96KHz sampling rate to get wider frequency range and higher precision from the two analog inputs. Amplifier system of NANOBASS is built with one piece high-efficient Class-D power amplifier TAS5805 also from Texas Instrument. The chip is wired in Parallel BTL mode to drive the woofer, and its 768KHz output PWM carrier frequency is ideal for rendering high resolution sound. With low-ripple switch-mode power supply and integrated DSP-based active crossover and dynamic range control, the amplifiers provide sufficient horse power for the speaker driver.
NANOBASS also features an integrated Bluetooth audio receiver, which is built with Qualcomm’s latest V5.0 chipset QCC3031. The chipset can support aptX HD codec, offering lower distortion and higher resolution Bluetooth audio playback than what traditional SBC can provide.
NANOBASS may be built for practice use, while it sounds a lot more than that. The sound image it renders exceeds its figure, and you may find it hard to believe the overwhelming sound wave are coming from such a tiny cube.