A4 monitor:

The A4 monitor is an exclusive design for home constructors and is of a quality that should approach the limits of what is currently possible with a two-way system. It is certainly one of the most impressive small loudspeakers that we have ever listened to. Audio enthusiasts with space problems in their home will find the design ideal for their requirements. The name of the design is derived from the dimensions of the front panel which are the same as those of A4 paper. The A4 has only one drawback: it is not cheap!