Visaton SC 5.9 FLX 8 Ohm, 2 x 3.5 Inch, Full Range Oval Speaker
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The SC 5.9 FLX combines a wooden cone and neodymium magnet in a shallow plastic basket. It is suited to compact hi-fi and built-in audio where a narrow speaker must reproduce both speech and music. The 8 Ω driver handles 4 W rated power, weighs 60 g and has a 141 Hz resonance.
Typical applications
- Miniature hi-fi speakers
- Slim multimedia equipment
Full specifications
| Rated power | 4 W |
|---|---|
| Maximum power | 5 W |
| Nominal impedance | 8 Ω |
| Frequency response (−10 dB) | 85−20000 Hz |
| Mean sound pressure level | 82 dB (1 W/1 m) |
| Resonance frequency fs | 141 Hz |
| Magnetic induction | 1.15 T |
| Magnetic flux | 184 µWb |
| Height of front pole-plate | 2 mm |
| Voice coil diameter | 25.5 mm |
| Height of winding | 1.8 mm |
| Net weight | 60 g |
| D.C. resistance Rdc | 7.1 Ω |
| Mechanical Q factor Qms | 3.16 |
| Electrical Q factor Qes | 2.55 |
| Total Q factor Qts | 1.41 |
| Equivalent volume Vas | 0.42 l |
| Effective piston area Sd | 26.8 cm² |
| Dynamically moved mass Mms | 3.0 g |
| Terminals | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
| Protective system | IP63 — front side in a sealed enclosure |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow for a 49.8 × 89.9 mm frame and 16 mm depth, plus rear connector clearance. Check the shaped panel opening and fixing positions against the drawing and actual basket. Support the plastic frame evenly without overtightening.
Seal the mounting joint into a sealed enclosure and protect the rear and terminals from moisture. IP63 applies to the front only; adhesive and a front grille may be needed to complete the seal.
Use an amplifier suitable for the 8 Ω load and follow the polarity marks. Check blade width and thickness before choosing connectors, insulate the connections and secure the wiring clear of the moving parts.
Use this impedance version’s enclosure parameters when developing a cabinet, and test the response at the intended listening level. Allow for the volume occupied by the driver and keep damping material clear of the cone and terminals.
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