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FRS 8 - 8 Ohm

Art. No. 2004

8 cm (3.3") HiFi fullrange driver. Linear frequency response between 200 and 20000 Hz. Suitable for sur-round effect speakers, mini sub/sat systems. Due to the small size very suitable for model construction and as control speaker for electronic devices.

Typical applications

  • Monitoring speaker for electronic devices
  • Ceiling- mounted speakers in railway carriages and busses
  • Mini Hi-fi systems
  • Model construction


  • Moisture-resistant membrane
  • metal design
*Gross price for private customers. Industrial prices are available on request.
Technical Data
Amplitude & Impedance Frequency
Directivity pattern
Rated power 30 W
Maximum power 50 W
Nominal impedance Z 8 Ohm
Frequency response 100–20000 Hz
Mean sound pressure level 82 dB (1 W/1 m)
Opening angle (-6 dB) 180°/4000 Hz
Excursion limit +/−2.5 mm
Resonance frequency fs 120 Hz
Magnetic induction 0.8 T
Magnetic flux 200 µWb
Height of front pole-plate 4 mm
Voice coil diameter 20 mm
Height of winding 4.5 mm
Cutout diameter 73 mm
Net weight 0.28 kg
D.C. resistance Rdc 7.2 Ohm
Mechanical Q factor Qms 4.85
Electrical Q factor Qes 1.32
Total Q factor Qts 1.04
Equivalent volume Vas 0.9 l
Effective piston area Sd 31 cm²
Dynamically moved mass Mms 2.5 g
Force factor Bxl 3.2 T m
Inductance of the voice coil L 0.9 mH
Connections 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Temperature range –25 ... 70 °C

Used in / Accessories:


If you do not have much space for your surround speakers to the rear and sides of your cosy chairs, this smaller surround system, CT EFFECT 80, is the ideal solution. The cabinets are so small, they can be hidden anywhere. The FRS 8 - 8 Ohm fullrange speaker, with its extremely linear frequency response, is well-suited thanks to its frequency response of 100 Hz - 7.000 Hz.
Comprehensive practical tests have demonstrated that, as far as surround speakers are concerned, omnidirectional sound distribution is particularly effective. This system produces a spatial listening effect which is independent of the actual seat position. In order to achieve this ideal sound distribution, the FRS 8 - 8 Ohm is mounted in such a way that it points upwards. The bundling effect does not begin until very high frequencies are reached, as a result of the small size. The required 7,000 Hz are therefore easily distributed horizontally. The optimal position for these small speakers is at head height beside the wall or in a corner of the room, behind the seats and to the sides. The relatively low power handling capabilities of these small speakers is of secondary importance because with this fullrange surround system the high-output, low frequencies are not included in the effects channel of the Dolby®-Surround Prologic system. Furthermore, a sound system is considered to be ideally set up if the sounds are felt to be coming from in front of the listener. These effect speakers generate a quieter, more diffused impression of the sound, which is not intended to be easily located. In terms of their sound output, these easy-to-make speakers will satisfy your spatial expectations. All the sounds encoded in films using the Dolby®-Surround Prologic system to include spatial effects are reproduced naturally and at more than sufficient volume levels for normal sitting rooms.
In conjunction with the CT SUB 80 system and the CT CENTER 80, two CT EFFECT 80 's provide an excellent surround sound "starter" system, that will transport viewers right into the centre of the action with centrally located dialogues, background noises and dramatic sound effects.

A complete kit for this suggestion is available via


Protective grille made of black painted metal. Decoration ring made of black plastics. Optimized fit for FRS 8 when mounting from rear side. Can be supplied painted in other colours on request. Attributes: - Plastics: PC-110 (UL 94: V-2)


Protective grille made of black painted metal. Decoration ring made of black plastics. Optimized fit for FRS 8 when mounting from front side. Can be supplied painted in other colours on request. Attributes: - Plastics: PC-110 (UL 94: V-2)


To be clear from the start: these small sized STELLA LIGHT speakers pack a considerable punch. While the outer appearance of the speakers might be described as compact or even sweet, this definitely does not apply to the maximum sound pressure of which they are capable. The combination of universal full-range FRS 8 - 8 Ohm loudspeaker and W 170 S - 8 Ohm woofer stands out because of its unbelievable level accuracy.

The fact that the separating frequency is at a very low 200 Hz benefits the STELLA LIGHT's positioning accuracy and generates an image of the stage that easily earns the "live" label. The FRS 8 - 8 Ohm full-range loudspeaker is remarkably detailed in its output: even the higher frequencies are reproduced accurately and with clear focus. Complemented by the W 170 S - 8 Ohm woofer, this combination covers almost the full range of frequencies required.

Whether used as computer speakers to the left and right of the desk or as a stereo set for the sitting room or bedroom, thanks to the excellent value-for-money price, these speakers can be used universally in many different environments without making too large inroads into your wallet. The simple, effective and intriguingly designed series crossover rounds the system off to produce a low-priced, quality building kit.

After all the cables have been positioned in the cabinet, the cable opening in the divider will have to be sealed off with e.g. hot-melt glue.

Art. No. 5896

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