Accuton - Absolute Aural Supremacy, Engineered By Thiel & Partner
Thiel & Partner have been designing, producing and distributing exceptionally high quality drivers under the brand name Accuton since 1994 now. Accuton has a simple goal; to provide the best and most dynamic speakers on the planet. A modest engineering company rather than a boastful behemoth; Accuton has completely mastered some of the worlds stiffest membrane materials including Al²O³ ceramics, CVD-diamond and aluminium sandwiches. Put succinctly, working with materials that send the so-called experts scrambling for the hills; this is the territory where Accuton absolutely excels.

Collaborating To Achieve Perfection
Customer interaction is another facet that Accuton excels at. Rather than put up walls claiming intellectual copyright because in reality you've not a clue; Accuton is famed for providing its customers with extensive support. It also collaborates with many in spheres such as design, construction and the implementation of electronic components, in order to successfully engineer the very best components available today. To read the full history of this masterful designer simply click here.

Design Ideologies
The AS250-8-552 is an 11 inch bass driver with aluminum honeycomb sandwich dome, being the first in an entirely new approach in Accuton speaker design. An ideal acoustical center has been achieved, which is identical with Accuton’s CELL tweeters and midranges. Its novel designed overhung motor combines the advantages of traditional overhung and underhung designs, delivering high linear excursion and ultra-low distortion. An exceptionally hard aluminum sandwich dome was developed for the CELL bass drivers that allows for negligible delay and energy storage. The hidden surround serves for reduced outer diameter and linear excursion of +/- 16mm. A new developed spider shape makes huge excursion without compression possible.

Why The Aluminium Sandwich
Given Accuton has mastered CVD diamond and alpha corundum ceramics, two of the very best membrane materials on earth; why search for a new one?

CVD diamond is definitely the best material available. It’s stiffness to weight ratio is unsurpassed, the internal sound velocity unrivaled. However you can only make tweeters and small midrange units, cost and serious technical problems prevent the manufacturing of larger cones. It is quite similar with ceramic domes. Ceramic is second to and almost as good as diamond, and still better than anything else except diamond; but again restricted in size. The largest dome Accuton can feasibly produce is a 160mm dome for the C220 series.

Doing research for larger bass cones Accuton found some interesting results. Laser scans of moving membranes taught it that the voice coil area is the most critical and deformation is strongest here while the outer area is fairly stable. However this is only valid for concave domes like Accuton builds, not for different membrane shapes.

Accuton decided to have an exclusively made white honeycomb membrane and doubled it up with a asymmetrically shaped ceramic dome, just to narrow one and a half years of tedious research into one sentence.

Design Features
Let’s explore the benefits of that white honeycomb membrane further.
– Large cones, up to 15″; are economically producible.
– Stiffness in the voice coil area is even better as with a pure ceramic cone.
– Outer area has very high damping factor, the unit is easily usable with a first order passive filter.
– The ceramic part of the dome (S280 and S220 models) has an asymmetrical (Wankel) shape, killing resonances.
– The aluminum honeycomb sandwich of the AS models (AS 250, AS 190, AS 168) has extremely good stiffness to weight ratio and an acoustic center in front of the speaker baffle.
– The cone is almost indestructible, even at severe overload. Nonetheless remember you can always still burn the voice coil!
– Bandwith and resolution is almost as good as a ceramic cone but this, after all; is not so important for a pure subbass unit.

Electrical Specifications
– Nominal configuration: single 4 Ohm 10″ subwoofer
– Continuous power handling: 300 Watts
– Maximum power handling: 600 Watts
– Voice coil diameter: 114 mm
– Frequency response: 20 Hz – 600 Hz
– Sensitivity: 87 dB
– DC resistance (Re): 3.9 Ohms
– Resonant frequency (Fs): 22 Hz
– Xmax: +/- 9 mm
– Compliance (Vas): 119 l
– Total Q (Qts): 0.38
– Mechanical Q (Qms): 5
– Electrical Q (Qes): 0.4

Physical Specifications
– Mounting diameter: 230 mm
– Mounting depth: 141 mm
– Weight: 7.4 kg

Documentation
– Specifications sheet

Important Disclaimers
Given the dynamic nature of electronics industries these days; below are listed some very important specifics you need to be aware of.

Brand Authorization And Stock Sourcing
We are a fully authorised Australian dealer of this brand and all stock is sourced through legitimate channels. It therefore enjoys full Australian warranty, backing and support.

Pricing Structure
Whilst we endeavor to offer the best price possible, we ask that if you do find a better price elsewhere from an authorised dealer; please contact us. Also be aware that we regularly conduct group buys and sales, therefore pricing can sometimes be subject to change without notice.

Stock Structure
Being a dynamic store is conducive to our inventory constantly changing. We list only a small portion of our stable online, usually products most popular. Aside from these we also stock numerous other variants and configurations of these products, hence if you don’t see what you’re after please contact us.

Shipping
All our products are shipped with registered and insured postage. Upon ordering you’ll be issued with a receipt, a consignment note via which you can track your order, and we’ll also SMS you photos of the package for identification purposes.

Technical support
This last one we cannot emphasise enough! Please contact us if you require any further information or assistance with the setup and use of this product, especially pertaining to aspects more technical. As we want you to get the very best from this product.