Marantz LS-7V
¥ 30,000 (a set of two cars, around 1990)
Commentary
A full-scale two way speaker system with compact body.
A 10 cm cone type woofer is used for the low range.
An Alnico magnet is used for the magnetic circuit. In order to bring out the characteristics of Alnico, it is housed in a jar-shaped yoke. It is resistant to magnetic modulation by voice coil current, and enhances the original low-strain characteristic of Alnico magnet.
Aluminum die-cast with sufficient thickness is used for the frame.
A 2.5 cm dome type tweeter is used for the high range.
The diaphragm is painted twice with acrylic damping agent by hand.
Large amplitude characteristics have also been improved by the use of a dummy balancer to prevent rolling and a twist / flexible lead.
The voice coil uses a single-layer winding with low inductance, and the magnetic circuit uses a double-layer strontium ferrite magnet.
High-density particle board with North American walnut veneer finish is used for the enclosure and R-shaped walnut is used for the corner part.
The network is designed separately for the woofer and the tweeter to prevent interference of each unit.
Other than that, large choke coils made of OFC wire and condensers for sound quality are adopted.
Model Rating
| Method | 2-Way, 2-Speaker, Sealed System, Bookshelf Type, Anti-magnetic Design (EIAJ) |
| Units Used | For low band : 10 cm cone type For high-pass : 2.5 cm dome type |
| Impedance | 6 Ω |
| Playback frequency band | 60 Hz to 22000 Hz |
| Rated input | 40W |
| Max Input | 80W |
| Output sound pressure level | 84dB/W/m |
| Crossover frequency | 1250Hz |
| External dimensions | Width 128x Height 204x Depth 163 mm |
| Weight | 3.0kg |