"J"-shaped superlative tonearm bearing the same basic structure as the one in the PS-X70 turntable but much upgraded for the use of the XL-55Pro MC cart and delivered stock on something quite different : the PS-X9 masterpiece !
The PUA-9 is a semi-long arm for less angle error, but not as long as the contemporary PUA-1600L.
Among other upgrades over the original design, the 9 uses a carbon fiber-coated aluminium alloy for its wand. Litz wires inside, of course.
VTA is adjustable "on-the-fly", the arm balance is set with the main counterweight (in-line with the armwand) while the tracking-force is adjusted with the smaller, deported, weight.
The PUA-9 was available separately from the PS-X9, starting in july 1978, with a manual cue/lifting device added.
"This unit is supplied separately from turntable system PS-X9.
The elimination of vibration at the pivot gap is intended as non-vibration design : the vertical bearing is connected firmly with the pipe wand ; the lateral bearing is supported at the long span.
Ball-bearings are generally used for pivot - but there is gap between ball and receptacle. This gap is reduced by extending the span between pivots. Moreover the bearing section is reinforced by a strong bearing block to lower inherent vibrations.
• Collet chucking connector at pipe end enables stable and strong connection between shell and wand - thus reducing gap and improving resonance at midrange.
• Arm wand is made by lamination of high tensile aluminium and light/strong carbon fibres. This material has 8 times higher flexural rigidity than conventional material (in our company). This makes for low resonance and clear image of sound.
• Heavy brass arm base supports arm rigidly.
• Polyurethane covered Litz wires are used for lead wire & phono cord. This reduces transmission loss due to high impedance.
• Terminals are gold-plated for anti-corrosive and low resistance characteristic.
• Special head shell (SH-165) is made of aluminum clad with carbon fibres. This has high flexural rigidity for low resonance.
• Magnet type of inside force canceller is free from friction loss at arm.
• One-touch arm height adjusting mechanism without step between +/-3mm.