Audio Database
DS-10000
Commentary

The DS-10000 is a speaker released by DIATONE in commemoration of its 40th anniversary.
There is a separate page for this model, but I would like to write a little more depth on this speaker.

As you know, the DS-10000 is based on the DS-1000. There seems to be a reason why the DS-1000 was chosen instead of the DS-3000 or DS-2000.

According to Diatone at that time, the DS-1000 was considered to have high potential in terms of the basic configuration of the system, and the fact that the DS-1000 had been boiled down to a critical point that was no longer movable in the basic configuration, and that the base data was also available was a major factor.

Also, there is a story that 30 cm might have been better for the woofer, but 27 cm diameter is a size derived from the necessity of 3 way configuration, and it seems to have been decided based on the conclusion that small diameter is better than large diameter in many cases (this may be the reason why DS 20000 and DS 20000 b are also based on 1000 series).
Furthermore, the arrangement of the units has been determined based on the results of the study of the acoustic radiation pattern by computer analysis in the laboratory, and it has been pushed to a level where it can no longer be moved.

Now let's look at each of the constituent parts.

Tweeter

  • Overall view of the tweeter.
    The most different feature from the DS-1000 is that the Boron D. U. D diaphragm has a 3-stage diaphragm structure.
    The sub-frame looks similar, but unlike the DS-1000's brass, the sub-frame is constructed with different details using machined gunmetal, making it possible to enjoy even more beautiful afterglow high-frequency playback.
    Damping felt is attached to the bottom plate.

  • A vibration plate for a tweeter.
    The one on the right is the DS-1000 and the one on the left is the DS-10000.
    This characteristic 3-step aperture was developed in the DS 5000. It has the advantage of increasing the rigidity of the diaphragm and extending the high-frequency reproduction limit. However, it could not be used in mass-production models because of the extremely high level of manufacturing technology required.
    By the way, as far as I know, only DS-10000 and DS-5000 have adopted this 3-step aperture, and even though it is the same limited model, it is not adopted in DS-20000 or DS-20000B.

  • The gunmetal frame is covered with cork material to prevent deterioration of the S / N ratio due to unnecessary radiation of the frame.

Mid-range

  • Full view of the mid-range unit.
    The back cover is formed by hand drawing (a method called spatula drawing) to disperse the resonance mode structurally so that it does not concentrate in one place. The number of mounting screws has also been changed from four in the DS-1000 to eight.
    By the way, in the DS-1000HR released after this, it is fixed at 8 pieces as well.

  • S-10000 and DS-1000 sub-frame and back cover.
    Not only the difference of materials and the way of making, but also the structure is different in details.

Woofer

  • The overall view of the woofer unit.
    It doesn't look much different from the other DS-1000 series, but the aramid honeycomb cone is handmade and pressed one by one, and the delicate curve is the feature.

  • The photograph of the cone part. It is said to be strong enough that it won't break even if an adult gets on the cone in this state.
    The material has been changed from DS-1000 polyamide to DS-10000 aramid (Kevlar).
    The Aramid honeycomb was used as an antenna for artificial satellites.

  • Magnet section
    The left magnet is mounted on the right frame and fixed.

Network

  • Network.
    Each unit is divided and mounted on a spruce board, and a radial supply system is adopted in which power is distributed radially from the input terminal in order to supply the appropriate current to each unit.
    Wire is LC-OFC and crimping sleeve is gold-plated.
    By the way, the network is very similar to the DS-1000HR released after this, but the capacitor for the tweeter seems to be different.

Enclosure

We can see that each unit was treated with great care, especially the enclosure. At first glance it looks like the same 1000 series with piano paint, but it has a very elaborate structure like a limited model.


  • The serrated nut to which the unit mounting screws are attached is driven into the baffle plate with a oxygen-free copper washer.
    In addition, in order to achieve an excellent S / N ratio, a rubber cap is attached to the mounting screw to suppress squeal thoroughly.
    In a general system, frames and screws were also used as part of making sounds.

  • The back of the baffle plate.
    The baffle plate is made of lumber core of Sitka spruce.

  • Sound absorbing material.
    The side wall is covered with wool felt and filled with 100% wool sound-absorbing material.
    Generally used glass wool seems to have been chosen because the hissing emitted from the sound absorbing material stains the sound of the speaker itself.

  • On the left is a cut photograph showing the different components of the enclosure.
    It is said that the side plate is a hard chip board sandwiched by multi-layer laminate of Chinese wood, the baffle is made of lumber core material of Sitka spruce, and the mounting structure material of the phase part and baffle is made of New Guinea Pometia pinnata muku material which is used for grand piano.
    All the materials are carefully selected one by one.
    The photograph on the right is a cut photograph showing the assembled structure of the baffle surface.
    The side plates and baffles are hozo assembled with Pometia pinnata mounting members. The reinforcing bars on the baffle face are made of spruce.

From here, I will look at the documents at the time of development published in magazines.

Documentation at the time of development

  • Early stage enclosure.
    It is difficult to understand, but the structure such as the reinforcement inside is quite different.

  • Final specification enclosure.
    Since the reinforcement crosspiece is arranged based on Diatone's unique distributed resonance structure, each member is attached to each face independently without being combined.

  • Unpainted enclosures.
    The material is carefully selected and used.
    Consideration is given to the baffle material and the back plate by changing the direction of the lumber core material to disperse the resonance mode.

  • Enclosures used for weathering tests and modal analysis.
    If you look at it in detail, you can see the trace of the change and it is very interesting.

Finally, let's look at the stand.

Stand

  • The speaker stand remained in the final stage of the development process.
    This was made in the image of a grand piano. It has a characteristic shape of feet, and some sound quality was hard to throw away, but it was not sold.

Finally

The DS-10000 is different from the 4-digit series, which was made to commemorate the 40th anniversary and was considered for mass production to some extent. It is made with attention to instruments such as piano and is particular about the material and combination of the enclosure, and it has a luxury that cannot be produced unless it is limited.