Vitavox

Vitavox

جمعه 6 ژوئن 2014
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میدونید بلندگوی Living Voice از درایورهای انگلیسی Vitavox استفاده میکنه. ترجمه لاتین کلمه Vita vox همون Live Voice هست.

Translated literally from the latin, “Vita Vox” means “Live Voice”.

We think this perfectly sums up what we’re all about.

این کمپانی در سال 1931 توسط Len Young پایه گذاری شده و الان توسط دو فرزند ایشون به نامهای Neil و David و شخص سومی به نام Mike Harvey اداره میشه.

ویتاووکس میگه تو ساخت درایور از همون متریال های گذشته استفاده میکنه دلیلش هم بهتر بودن صداست :

The truth is that Vitavox hi-fi products today are built using largely the same technology and processes that have always been in place. The same tools that pressed the pressure unit diaphragms and wound the bass driver coils, the same patterns from which the chassis components are cast, the same assembly jigs to ensure precision fit of both pressure and cone drivers: all are still in use today just as they were in the 1950s and 60s.

We make no apologies for this; quite the reverse in fact. We feel that to maintain such strong links with the past constitutes the best way of ensuring that the intrinsic qualities that have always made a Vitavox product special remain so for years to come.

ویتاووکس بهترین راه برای ساخت بلندگو رو هورن میدونه چون معتقده وقتی افیشنسی با هورن میاد بالا ما میتونیم از درایورهای سبک تر و سریعتر با دیستورشن خیلی کمتر استفاده کنیم و از آمپ های کم توان تر که میتونن خروجی ایده الی در توان های کم داشته باشند.

A horn loaded device can transfer this energy far more efficiently. As they have to work much less hard than a similar direct radiating device to generate any given volume of sound, they can thus be constructed with lighter, more responsive cone/diaphragm assemblies, and these can operate with reduced excursion, which in acoustic terms means a vastly improved transient response and lower distortion. Their efficiency also makes them far easier to drive, allowing not only much lower power amplifiers to be used but also their operation with increased headroom and consequently less distortion.

بدلیل گندول شدن خیلی زیاد هورن ها در فرکانسهای پایین bass ، ویتا ووکس همانند رومی پیشنهاد سیستم هیبرید داره و میگه میشه تو فرکانسهای پایین از دایرکت ردییتور استفاده کنیم.
داره بازم توفان میاد…

اما جالبه بدونید Guy Sergeant از کمپانی Audio Innovations و Kevin Scott از کمپانی Definitive Audio اولین بلندگوی سبک فعلی Living Voice رو با الهام از بلندگوی Thunderbolt شرکت ویتاووکس در سال 1992 ساختند با نام Living Voice Air Partner .

http://website.lineone.net/~empson/index.html

Kevin Scott of Definitive Audio (a specialist hi-fi retailer based in Nottingham) and Guy Sergeant of Audio Innovations started working on a serious full range horn system in the early nineties. Inspired by the Thunderbolt (see Speaker Systems page) they decided that a purist design using the same principles could be the basis for a world leading speaker.

So with that in mind they approached Vitavox who agreed to a Joint venture and whilst they didn’t provide the funding they did give them access to their full technical resources. In honour of their assistance the speaker system where branded Living Voice.
Guy was mainly responsible for the crossover design whilst David and Neil Young of Vitavox worked on refining the bass horn design and an industrial design consultant was called in for his aesthetic input.
After nine months of meticulous empirical development on the crossover and the composite cabinet the speaker was ready for the market. Called the Air Partner it caused a stir when it was released to the British press in 1992 and to the public at the London Hi-fi show.

The design used a Gauss 1502 tweeter rolling in above above 13 Khz, whilst the mid range was covered by an RH330 horn in a sand filled box coupled to an S2 compression driver. Crossovers were all conventional second order slopes.

The bass horn was driven by an AK157 and used similar ‘Z’ shaped folding geometry to the Thunderbolt. As the diagram below shows, the internal surfaces of the horn were curved, smoothing the flow of air. The mains structure was made of 36 mm high density Birch ply. A ‘phase plug’ was also used, as in the Thunderbolt, to extend the frequency response of the bass horn.
The area behind the driver was left open, as it was judged to sound better than using a sealed chamber. Even though this should compromise bass extension it was still measured (by Hi-fi Choice reviewer, Paul Messenger) to be just -5 dB down at 40 Hz

The Statesman version was released in 1995 and was the ultimate version of the Air Partner. It featured a variety of refinements which included JBL 2405 slot tweeters that were time aligned by being positioned on a gantry over the compression drivers coils.
The damping on the mid range unit was changed from sand to a polyurethane polymer and I also believe the S5 rather than the S2 compression drivers were commonly fitted.
They were available in Mahogany with Birds Eye Maple detailing or Black Lacquer with Birds Eye maple detail.

ادامه دارد …

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