Visaton FRS 8 M 8 Ohm, 3.3 Inch, HiFi Full Range Speaker
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The strong magnet system gives the FRS 8 M a sensitivity of 88 dB, making it useful for compact bass-reflex speakers and columns. Its 75 mm cut-out and enclosure parameters differ from those of the standard FRS 8.
Typical applications
- Small bass-reflex loudspeakers
- Column loudspeakers
- Miniature subwoofer/satellite systems
Full specifications
| Rated power | 30 W |
|---|---|
| Maximum power | 50 W |
| Nominal impedance | 8 Ω |
| Frequency response (−10 dB) | 100–20000 Hz |
| Mean sound pressure level | 88 dB (1 W/1 m) |
| Opening angle (-6 dB) | 147°/4000 Hz |
| Excursion limit | ±2.5 mm |
| Resonance frequency fs | 125 Hz |
| Magnetic induction | 1.2 T |
| Magnetic flux | 225 µWb |
| Height of front pole-plate | 4 mm |
| Voice coil diameter | 20 mm |
| Height of winding | 4.5 mm |
| Cut-out | 75 mm |
| Net weight | 0.5 kg |
| D.C. resistance Rdc | 7.2 Ω |
| Mechanical Q factor Qms | 3.24 |
| Electrical Q factor Qes | 0.58 |
| Total Q factor Qts | 0.49 |
| Equivalent volume Vas | 1.1 l |
| Effective piston area Sd | 29 cm² |
| Dynamically moved mass Mms | 1.8 g |
| Force factor Bxl | 4.0 Tm |
| Inductance of the voice coil L | 0.3 mH |
| Terminals | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
| Temperature range | -40 to 130 °C |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow for a 78 mm square frame, 44 mm depth and additional space for the terminals. Use the FRS 8 M enclosure parameters when designing the cabinet. Optional grilles: 1138 and 4634.
Use an amplifier suitable for the 8 Ω load and observe terminal polarity. For a 100 V line system, connect through a suitable line transformer; do not connect the driver directly to the line.
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