Much of the car's ear-catching audio system has been fitted into the boot and, as such, there's no space for luggage, aside from what you can cram into the passenger cell.
All up there are 16 speakers in the ForGigs, as well as two 30cm diameter subwoofers. The doors have been modified to accomodate three mid-range speakers each, while there are four tweeters in the dashboard. The subs live in the boot, while a pair of mid-range speakers and tweeters live in the tailgate's left- and right-hand sides.
Powering the whole shebang are five amplifiers providing up to 150dB. There are three JBL GTO 804 EZ amps for the car's tweeters and mid-range speakers, while two JBL GTO 751 EZ amplifiers drive the subwoofers.
There's also an eight-channel Mosconi digital signal processor that can handle uncompressed file formats, such as WAV and FLAC, in addition to the more common lossy files, such MP3.
Smart says that all the audio equipment on-board is connected via 100 metres of cable and the ForGigs has been kitted out with roughly 10 square metres of insulation.
There are controls so that the DJ can change the colour of the car's interior and exterior ambient lights.
Smart will take the amped up ForTwo on a tour of Europe this summer, although no dates or locations have yet been announced.
The latest generation Smart ForTwo, which was launched in the middle of 2014, shares its platform with the Renault Twingo and the five-door ForFour. The new Smarts will not be coming to Australia in the short term, although a spokesman for Mercedes-Benz Australia says that the company is "definitely keen to make the [business] case work for Australia".