Osborn "Pinnacle" & "Reference Pinnacle" Mark 11
"Very few loudspeakers of this size at any price can match the transparency, detail, dynamics, weight and sheer power of these speakers.


The Osborn Pinnacal Tower has been designed and constructed in Australia, without 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 a speaker even less physically imposing than the Osborn "Eclipse Tower".   We believe that our design goals have been realized with this speaker.
The Osborn "Pinnacle" was designed at the request of the Norwegians. They rated the Eclipse Tower as unsurpassed by pretty well any other speaker, but wanted something a bit smaller to satisy the needs of theit cliants. This is the result.
               The dynamics, bass, transparency, scale and sheer power becomes unmatched by virtually any other similar sised speaker speaker, at any price.   Few other speakers anywhere near their size can deliver the whole weight, power and authority of a full symphony orchestra. From the tinkle of the tiniest bell to the blast of a brass cannon, to the depth of a giant 32 foot pipe organ, with pin point imaging.
               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. 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 best Electrostatic speakers has been achieved, but without the the trade off of limited dynamics and authority.
               The crossovers use the best components attainable.   The capacitors are imported from America, and the inductors are wound in-house, as none are available commercially which meet our criteria. Each crossover weighs about 9 kg.   Each and is hard wired with specially selected ultra wide bandwidth, high speed transfer cable.
             The cabinets are shaped using high precision, computer controlled milling equipment.   All models are constructed from 32 mm Customwood and are heavily braced.   They are exceptionally heavy, solid and are acoustically inert.   The Reference Pinnacle (Referance Eclipse Tower pictured in comparisopn photo) is lined with a felt/lead sheet/felt sandwich for unparalleled cabinet solidarity.   High quality natural timber veneers are used, and every cabinet is carefully hand finished to ensure a superb quality finish which will grace any living room.
              Only the best quality Turntable/CD Player and Amplifiers were used in the design of these speakers.   These speakers have a number of outstanding features - the ability to separate instruments and place them firmly and accurately on a sound stage of uncanny width and depth.   The instruments retain their correct pitch, tone and shimmer with a dynamic range and speed unmatched by any speaker this size, in any price range, with drums retaining all of their impact and depth.

(Showing size comparison with Eclipse Towers)

Photos show Mk 1 model. Midrandge and bass driver have changed.

PhPhotos show Mk. 1









SPEAKER DIMENSIONS   1420 X 250 X 340 mm
WEIGHT 53 Kg.  (Reference 75Kg.)
EFFICIENCY 93db for I watt at 1 meter.
Tweeter  (For Pinnacle Reference)  
29mm soft dome tweeter with a high
efficiency ring magnet consisting of 6 radial
Neodymium magnets.

Tweeter  (For Pinnacle) 
25mm fabric dome withan 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.
Mid Range    
165mm "W" Cone. 40mm voice coil with Neodymium magnet.
          Bass Drivers
179 mm paper cone with a unique Nextel coating.  39 mm voice coil. Cone weight  20g.   Driver weight 3.2 Kg. Resonant Frequency 38Hz.
FREQ. RESPONSE 35 to 21000Hz, +/- 3 db. -10db  points  20 and 25000Hz.  Reference 25,000Hz
CROSSOVER POINTS   125 Hz and 3300 Hz, @ 12 db/Octave.
MAXIMUM POWER 150 Watts R.M.S per Channel.
Rec. Min. 10 Watts per Channel. 
Rec. Ideal. 30 - 100 Watts per Channel.

Larger amplifiers can be used, but take care. If the speaker distorts, back off the volume. The above specifications show why these speakers are capable of such extraordinary transient performance and yet reveal such intimate detail in the music. This fidelity is possible due to the fine tolerances and light weight of the driver cone and voice coils.

The warranty on these speakers is five years parts and labour from the date of purchase.