ONKYO PX-3F

Commentary

A full auto player with improved sound quality and operability by introducing the latest technology.

It has a built-in computer and realizes accurate auto operation such as normal full auto operation, search drive, queue down / lift up, memory repeat operation, etc.
Accurate operation is achieved by a fully non-side-pressure auto-return detection mechanism using CPU commands and photoelectric sensing elements, and by a pulse motor dedicated to arm drive.

The newly developed straight tone arm is used for the tone arm.
This arm has a linear structure that connects the rotating shaft with the needle tip at the shortest distance. It is a slim type made of hard aluminum material, yet it retains high rigidity. In addition, an ADC-type shell made of carbon fiber is used to minimize contact failure and resistance. In addition, in order to realize smooth movement of the tone arm, ultra-precision miniature bearings are used in the bearing section, and an extremely light feather support system is used in both vertical direction and horizontal rotation direction.
As a result, the effective equivalent mass of the tone arm has been reduced to approximately 15g (1/2 compared to the conventional one), and the initial motion sensitivity is as high as 0.5 mg at the center value, greatly improving the traceability.
In addition, when a high-compliance cartridge is mounted on an ordinary arm whose resonance frequency determined by the effective equivalent mass of the arm and the compliance of the cartridge is set to 6-7Hz, the infrasound component caused by the sleigh of the record is superimposed on the music signal and causes intermodulation. To prevent this, the resonance frequency is set to a value that suppresses the effect of the sleigh.

The cartridge is equipped as standard with a VM type 0.6 mil circular needle OC-201V with a dual magnet structure similar to the recording cutter head.

Uses a 20-pole, 30-slot vertical direct drive motor.
Since the servo circuit instantaneously compensates for the sudden load fluctuation of the sound groove at large amplitude, smooth rotation characteristics are obtained.

In order to improve the flatness of the record surface, the entire surface of the aluminum die-cast turntable is subjected to surface polishing with diamond to improve the horizontal accuracy of the surface to the same level as that of precision machining mechanisms.
In addition, the turntable sheet is finished by center gate injection molding of transparent amorphous polyolefin instead of conventional rubber pressure molding to achieve uniform and highly accurate thickness.

For the cabinet, a 4-layer polymerization combination cabinet combining materials with different physical properties is adopted for miniaturization and non-resonance.
3kg/cm of metal plate for the upper layer, synthetic rubber viscoelastic special resin for the middle layer and impact resistant resin for the lower layer²Three layers are bonded under pressure to thoroughly reduce the vibration transmission of the turntable board. In addition, vibration-proof resin with different specific gravity from the body is used for the bottom plate part to prevent the effects of resonance overlapping and howling.

The insulator has a composite structure combining a spiral coil spring that is particularly effective in low frequencies and a special shape rubber vibration isolator that is highly effective in middle and high frequencies.
The resonance frequency formed by the total weight of the player and the player and the compliance of the coil spring, is approximately 10 Hz, and an excellent anti-vibration effect is exhibited in the audible frequency band above this.

Model Rating

Type	DD Plus 3 computer full auto player
<Turntable portion>
Turntable	31 cm aluminum die-cast, weight 1.2 kg (including seat)
Motor	Brushless DC servo motor
Number of revolutions	33 1/3, 45 rpm (± 3% adjustable)
Wow and flutter	0.025% or less (WRMS)
S/N	60 dB or More (JIS) 72 dB or more (DIN-B)
Tone Arm Section
Tone arm	Static balance type Straight-tone arm
Effective length	224mm
Overhang	13mm
Offset Angle	21 ゜
Tracking error	+ 3 °, -1 ° or less
Cartridge weight range	8g ~ 12g (Including Head Shell)
Needle pressure adjustment range	0g ~ 3g
Attachment mechanism	Needle pressure direct reading addition ADC Type Detachable Head Shell (Weight 3g) Sliding type anti-skating mechanism
Cartridge Section
Cartridge	VM Type
Frequency characteristic	18 Hz to 25 kHz
Output voltage	4mV(1kHz)
Output balance	Within 2 dB (1 kHz)
Separation	25 dB or More (1 kHz)
Compliance	10x10-6dm/dyne
Cartridge dead weight	5.4g
Proper needle pressure	2.0g
Needle Tip (Replacement Needle)	0.6 mil Round Needle (DN-201ST)
Load impedance	47k Ω
<General>
Power consumption	12W
External dimensions	Width 418x Height 130x Depth 380 mm
Weight	5.6kg