Mid sized 3 way centre speaker besigned to give most of the extroadinary performance of the larger C3.


Now discontinued.                          

The Osborn C1S was designed and constructed with little compromise in order to obtain the highest possible sound quality. The only criteria in the choice of components, materials, size and cost is the achievement of the ultimate sound quality, in order to match whichever other Osborn Loudspeakers are used as the main speakers, in a Home Theater system. We believe that our design goals have been realised with this speaker.

             The cabinet is constructed from 25 mm Customwood instead of the usual 18 mm Chipboard used by other Centre Speaker manufacturers. This ensures that the output of the rear of the Bass Driver is more thoroughly isolated from the sound emitted from the speaker itself. Any spurious cabinet vibrations will result in a loss of definition and sonic purity.

            Several of the world's best speakers were used as references in the design of' these speakers. We believe that the sound quality of these speakers is superior to all the references anywhere near their price and size. The drive units were chosen from the best available from around the world for unrivalled speed and accuracy. As a result, a level of transparency comparable to the rest of the range of Osborn Loudspeakers has been achieved.

             Many center speaker manufacturers attempt to cram as many cheap drivers as possible into a cabinet of a given size, so that prospective buyers are impressed by the apparent complexity of the speaker. This defeats the purpose of such a speaker. A driver with a low frequency cut off of say, 75 Hz, still has a 75 Hz lower limit if 2, 4 or even six drivers are used. The use of so many drivers causes phase and other problems as each driver madly interferes with each other. A smeared image also results, when one of the main requirements of a center speaker is to locate voices nearer to the viewing area. The Osborn Center speaker uses a single, very high quality tweeter and a pair of the same 5" mid/basses that are used in the Osborn F1. This necessitates the use of a 3 way crossover, but results in a more dynamic speaker with superior bass extension. This speaker is flat to 50 Hz and has usable bass to under 30 Hz. This allows for the entire range of human voices to be easily reproduced. 

             The crossovers use some of the best components attainable. The capacitors are imported from France and the inductors are wound in-house as none are available commercially which meet our criteria. Each crossover is hard wired with quality Datalink ultra high speed, ultra wide bandwidth cable.

              The speaker is designed to be placed under or on top of your Television. The cabinet is exceptionally strong and is able to easily withstand the weight of the heaviest Televisions. The speaker may also be mounted above top of the Television, if it can be accommodated. The speaker is covered in a high quality timber veneer to match the rest of your audio equipment. 



SPEAKER DIMENSIONS: 180 X 300 X 500mm 

WEIGHT: 14 Kg. 

EFFICIENCY:  90 dB for 1 watt at 1 meter. 

FREQUENCY RESPONSE: 50 to 19000 Hz +/- 2 db. -10dB points 35 and 21000 Hz. 

CROSSOVER POINTS 300: Hz and 3700 Hz @ 6 dB/Octave. 

MINIMUM IMPEDANCE: 6 Ohm at 200 Hz. 

MAXIMUM POWER:  70 Watts R.M.S per Channel 

Rec. Min:  As per requirements. (20 watts and above) 

        The above specifications show why this speaker is capable of such extraordinary transient performance for such a small speaker and yet reveals such intimate detail in the music. This fidelity is possible due to the fine tolerances and light weight of the driver voice coils. This minimal compromise design allows the natural life and excitement of the original live performance to be faithfully reproduced.



25mm fabric dome with an optimally shaped dome and a wide SONOMEX surround. Low viscosity magnetic fluid which provides excellent cooling while maintaining a low resonance frequency. 6 mm solid metal front plate with a slight loading characteristic which ensures linear frequency response, and a stiff and stable connection to the cabinet. A double magnet system, with a substantial injection-moulded rear chamber, with complex internal shape and reinforcing ribs, which eliminate unwanted chamber resonances and reflections.


125mm "W" Cone. 25mm voice coil with 1.5kg magnet.

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