Pioneer S-933

Commentary

A speaker system that goes back to the basics and pursues expressive power directly from the front.

A 32 cm cone type woofer is installed in the low range.
The corn uses a special manufacturing method that does not damage the pulp fibers, which is the material of the corn. The basic resolution is reduced and the natural low frequency reproduction is achieved. In addition, aluminum is used for the center cap to obtain a sound with a core toward the middle range.
The linearity is improved by using a urethane edge for which values of Young's modulus and internal loss were examined, and the magnetic circuit is composed of a 160 φ mm magnet and a T-shaped pole that reduces the distortion component.

A 6.5 cm dome type skoker with pure beryllium diaphragm is mounted in the middle area.
It is equipped with a newly developed cantilever suspension in order to reduce the distortion and broadband of the vibration system. This is a support system that does not radiate sound from the suspension and can securely hold the center even at large amplitude. In order to increase compliance and improve followability, it uses a material that sandwiches a viscous damping material with thin copper alloys. In addition, in order to reduce natural resonance, suspensions of different lengths are arranged alternately. The shape is also carefully examined.

A ribbon-type tweeter equivalent to the PT-R7A is installed in the high-frequency range, enabling ultra-high-frequency playback at 120 kHz.

We have carefully examined the network circuit structure, elements, and layout to pursue low loss and low crosstalk.
High-precision low-loss capacitors and coils are used, and a woofer coil is provided separately to avoid unnecessary induction.

The enclosure uses conifer particleboard with high density and high internal loss, and marble ebony for the surface finish.

Model Rating

Method	3-Way, 3-Speaker, Bass reflex system, Bookshelf Type
Unit	For low band : 32 cm cone type For Middle Area : 6.5 cm Dome Type For High Frequency : Ribbon Type
Impedance	8 Ω
Playback frequency band	30 Hz ~ 120 kHz
Output sound pressure level	91dB/W/m
Max Input	100W
Crossover frequency	950 Hz, 8 kHz
External dimensions	Width 390x Height 680x Depth 378 mm
Weight	31.5kg