ONKYO PX-55F

Commentary

This is a full-auto player system with double suspension system that blocks vibration twice.

We have developed and installed a double suspension system to prevent adverse effects of speaker vibration transmitted through the floor surface and sound pressure (air vibration) transmitted from the air.
This system uses a double vibration transmission isolation structure in which the signal system attached to the float base is suspended (transmission isolation) with respect to the cabinet and the cabinet is suspended (induction isolation) with respect to the floor surface. The float base is molded with high-rigidity and high-density zinc die-cast in the minimum required area, so that the direct influence of sound pressure is minimized in terms of physical properties and area.
In this method, the arm and the motor are firmly connected, and the relative position displacement is suppressed, enabling more ideal tracing.
In addition, the cabinet is made of high-density resin and concrete material that balances internal loss and effects on sound quality. For floor durability, it is suspended and stably supported by an 80 mm diameter large insulator that is strong against horizontal and vertical vibration.

The motor is equipped with a 20-pole 30-slot quartz lock type high-torque DD motor. The rotation is corrected by a quartz PLL circuit to achieve stable rotation.
The turntable is designed not only to be heavy but also to take into consideration the optimum mass distribution and flywheel effect. Each product is made of aluminum die cast with a weight of 1.5 kg and a diameter of 33 cm. The dynamic balance of each product is checked and precisely finished.

The tone arm is a straight arm with the natural vibration frequency set to the optimum value.
The support part of this arm uses a miniature bearing with a high heat hardened finish, and adopts a gimbal support system with smooth movement in both vertical direction and shaft rotation direction.
In addition, the arm material is made of high rigidity aluminum finished by surface treatment with high acoustic effect to achieve both high sensitivity and clear sound quality.

Equipped with a full auto mechanism that can control all tone arm movements, including search mechanism and auto-repeat, with front operation keys.
The PX-55F uses a completely non-side pressure system with photoelectric sensing elements so that excellent trace capability is not lost due to the auto function.

The cartridge is equipped with Orthophone VMS cartridge FF-15EO/mkII.
In addition, the head shell adopts an ADC-type detachable type with self-cleaning effect made of carbon fiber.

Model Rating

Type	Double Suspension System Quartz DD Full auto player system
<Turntable portion>
Turntable	33 cm aluminum die-cast, weight 1.9 kg (including seat)
Drive system	Quartz PLL direct drive
Wow and flutter	0.012% or Less (FG) 0.023% or Less (W. R. M. S)
Signal-to-noise ratio	78 dB (IEC-Y, DIN-B)
Tone Arm Section
Tone arm	Static balance straight arm
Effective Length / Overhang	224mm/13mm
Offset angle / tracking error	21 ゜ / + 3 ゜ ~ -1 ゜ or Less
Needle pressure adjustment range	0g ~ 3g
Compatible Cartridge Weight	5g ~ 9g (Excluding Head Shell)
Cartridge Section
Cartridge	VMS Type (OC-60VMS) Orthophone FF-15EO/mkII
Frequency characteristic	20 Hz to 20 kHz
Output level	5mV(1kHz)
Output balance	1.5 dB or Less (1 kHz)
Separation	20 dB or Less (1 kHz)
Compliance	20x10-6cm/dyne
Cartridge Weight	5g
Proper needle pressure	2.0g
Needle tip	0.7x0.3 mil Elliptical Needle
Exchange needle	DN-60STE / Orthophone Name NF-15EO/mkII
Load impedance	47k Ω
<General>
Attachment mechanism	Detachable Head Shell (SH-21E) Dial anti-skating
Power consumption	9W
External dimensions	Width 442x Height 155x Depth 410 mm
Weight	8.8kg