W 170 S - 4 Ohm
Art. No.
9024
17 cm (6.5") HiFi woofer with coated paper cone, powerful drive and extended rear pole plate. Special voice-coil and elastic rubber surround for long strokes.
Technical Data
Sketch
Recommended cabinets
Amplitude & Impedance Frequency
Directivity pattern
| Rated power | 50 W |
|---|---|
| Maximum power | 80 W |
| Nominal impedance Z | 4 Ohm |
| Frequency response | fu–8000 Hz |
| (fu: Lower cut-off frequency depending on cabinet) | . |
| Mean sound pressure level | 86 dB (1 W/1 m) |
| Opening angle (-6 dB) | 72°/4000 Hz |
| Excursion limit | +/−10 mm |
| Resonance frequency fs | 36 Hz |
| Magnetic induction | 1.0 T |
| Magnetic flux | 314 µWb |
| Height of front pole-plate | 4 mm |
| Voice coil diameter | 25 mm |
| Height of winding | 12.5 mm |
| Cutout diameter | 148 mm |
| Net weight | 1.1 kg |
| D.C. resistance Rdc | 3.2 Ohm |
| Mechanical Q factor Qms | 2.16 |
| Electrical Q factor Qes | 0.51 |
| Total Q factor Qts | 0.41 |
| Equivalent volume Vas | 38 l |
| Effective piston area Sd | 129 cm² |
| Dynamically moved mass Mms | 12 g |
| Force factor Bxl | 4.4 Tm |
| Inductance of the voice coil L | 0.6 mH |
| Connections | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
Used in / Accessories:
ALTO I
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.
Art. No.
5966
ALTO II
This 2-way column speaker, ALTO II, designed as a 30 litre vented system, is another suggested application from the Alto series. The same driver arrangement has been selected as for the ALTO I but, here, the lower range octaves benefit from the enlarged cabinet volume and optimum bass frequency to produce powerful, responsive bass.
ALTO II is also well-suited to improving the sound of low-priced compact hi-fi systems.
The ALTO II can be positioned freely anywhere in the room, producing clearly defined spatial sound character.
Art. No.
5967