Audio Database


Pioneer S-99twinX
118,000yen(one set, the 1990 release)

The speaker system which aimed at the reproductivity of the sound field which introduced the wave-front control technology into the vertical twin newly, and were more excellent in it, and the clearer image lateralization.

In order to employ the merit of a vertical twin speaker efficiently further, the wave front of sound reached the listener's ear how, or the actual condition was solved scientifically, and a new wave-front control technology is introduced.
the point -- "baffle form "which electric phases, such as a network, are made to agree [ "controls the directivity of a Woofer and a tweeter" ]", [ "which adjusts the energy time response of a Woofer and a tweeter on a time base" ]By four points of controlling a wave-front diffraction", the wave of sound enables the propagation of the wave front of a beautiful sound which spreads uniformly by these-controlling.

Two 20cm cone type Woofers using the newly developed cone that mixed the aramid fiber in pulp are adopted as low-pass.
Moreover, a short ring is used for the Alnico magnetic circuit of a new-installation meter, and it attains a Low-noise-izing further, and is raising driving force further by edgewise voice coil adoption.
A frame is aluminum die-casting of a high rigidity, and is intercepting the unnecessary oscillation by adopting a shielding frame gasket as this.

The 3cm dome shape tweeter which employed the W.F. (wave front) director is adopted as a high region.
The diaphragm location of the tweeter was controlled so that the peek of a riser was in agreement, and also the directivity is controlled with a director's horn form, by this, the wave front of the sound in a listener's listening location is made to coalesce, and the reproductivity of sound field and the image lateralization are raised more.
A director has few resonances fabricated by the special elastic body, and is firmly fixed to an aluminum die-casting flange.
The ceramic graphite of 99.99% of a carbon purity is adopted, and in a magnetic circuit, flux density is large, and has adopted the quality AlNiCo-Magnet as a diaphragm in it.

Each unit has adopted full mid ship mounting, a Woofer is fixed to the inner baffle prepared in the interior of an enclosure, and the tweeter is firmly fixed from a rear view through a spacer.
The unnecessary oscillation of the baffle was suppressed by this and little natural play sound of the distorted feeling has been obtained.

Distribution of the unit was used for the network and it has prevented the cross interferencee of each unit.

The round treatment was carried out greatly and the top baffle has controlled the wave-front diffraction.
Moreover, it is designed so that it may be flattened with a lower baffle at the time of a saran net attachment, and it is tuned up so that the tone quality which is in the status of an attachment and was excellent may be obtained.
Finish of the enclosure is Chinese quince tone finish of the reddish dark brown colour.

The large-sized terminal in which a bi-wiring interconnection is possible is adopted.

Tweeter Woofer

Rating of a mode
Scheme 2 ways, 3 speaker bass-reflex scheme, a floor type, and a magnetic-shield design
Using unit For low-pass: 20cm cone type x2
For high regions: 3cm dome shape +W.F. director
Impedance 6ohm
Play frequency band 29Hz - 22000Hz
Output sound pressure level 91dB/W/m
The maximum input 180W(EIAJ)
Cross over frequency 1800Hz
Dimensions Width 272x height 1000x depth of 380mm
Weight 40.0kg