Characteristics and sound properties
The ALTO I is a 2-way shelf-mounted speaker with a cabinet volume of 13 litres. Apart from the 20 mm tweeter cone, the cabinet contains a 17 cm diameter mid-bass cone. 
The sound qualities of the ALTO I are "warm" but with crisp, high-range reproduction. 
This  kit is ideally suited to replacing the more basic speakers often  supplied as standard with low-priced hi-fi systems and thus improving  the overall standard of the system. 
Since the bass ports are at the front, the ALTO I can be hung on the wall or placed in bookshelves, facilitating good bass response even in rooms with difficult acoustics.
 
| Technical Data: | 
|---|
                                                   | Rated power | 60 W | 
                        | Maximum power | 100 W | 
                                 | Nominal impedance Z | 4 Ohm | 
                                  | Frequency response | 50–22000 Hz | 
                                 | Mean sound pressure level | 83 dB (1 W/1 m)
 | 
                                                                                                                                                                                                            | Cut-off frequency | 3500 Hz | 
                        | Principle of Housing | Bassreflex | 
                             | Net volume | 13 l | 
                        | Outer dimension height | 380 mm | 
                        | Outer dimension width | 230 mm | 
                        | Outer dimension depth | 230 mm | 
 
Component parts list for 1 box
The kit includes all the components listed here but not the cabinet.
 
               | Tweeter | DT 94 8 Ohm | 1 pc. | 
              | Bass-midrange driver | W 170 S 4 Ohm | 1 pc. | 
              | Crossover | Crossover Alto I/II (with terminal, cables and plugs) | 1 pc. | 
              | Bass reflex tube | BR 6.8 (full length) | 2 pcs. | 
              | Damping material | Polyester wool | 1 bag | 
              | Wood screws | 3.5 x 19 mm | 12 pcs. |