Sony PUA-7
(1977 - 1981)

Smaller and lighter tonearm developped after the original PUA-9, available separately for 30,000¥ but mainly sold as mounted on the PS-X70, PS-X60 and PS-X50 bestsellers. Released after the PUA-1600L and PUA-1600S. The standalone version of the PUA-7 is extremely rare - a proof of people's latent snobism :-)

- Arm wand is made from high tensile aluminium pipe with diameter 10mm. This material has 8 times higher flexural rigidity than conventional material (in our company). This makes for low resonance and good balanced 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 SH-165 head shell is made of aluminum clad with carbon fibres. This has high flexural rigidity for low resonance.

- Inside force canceller by combination of special cam and spring can compensate side thrust of arm exactly.

- One-touch arm height adjusting mechanism without step between +/-3mm.