- Powerful damping by air layer
External noise and noise generated from the needle tip are absorbed by the air film of 0.01 mm.
- Stable arm unit supports fine needle tip
By tracing the locus of the cutting machine as it is, Absolutely no difference of the sound of the outer circumference and the inner circumference. With the mass of moving parts trace accurately to low frequencies.
Arm Unit AFU1-2 Arm that supports fine needle tip
AFU1-2 sound pickup philosophy
In the LP record, sound grooves of 120 micron width are engraved at intervals of 600 or more from the outer circumference to the inner circumference, and the needle traces submicron music signals.
Characteristics required for the arm are not fine movement when the cartridge traces the signal, movement lightly to the adjacent sound groove moves lightly, does not receive unnecessary vibration from the surroundings, vibration generated by the needle is generated only in the generating coil It is to tell. In the production process of analog discs, since the movement of the cutting race becomes a straight line, linear movement is also required for the head. In AFU1-2, linear tracking was realized by air floating, the fine movement at the time of signal tracing was suppressed by the weight of the arm, and the movement to the adjacent groove slowly moved lightly. Vibration generated at the tip of the needle is transmitted through the arm and damped by the air layer of the slider part, so it will not be reflected back to the tip of the needle.
Linear Tracking Arm
Linear tracking arm
Record grooves are not engraved at regular intervals, and where the signal is small, the interval is small, whereas where the signal is large the interval is large, earning the time to be able to reproduce.
In the past, several linear tracking arms that detected the angle of the needle tip and served a serial control were suggested, but since there was a disadvantage of the servo control described above, it disappeared from the market. In AFU1-2, the arm can be moved with a force of 0.5 g or less by its own air floating structure, and the irregular record groove is stably traced from the outer periphery to the inner periphery. Also, heavyweight arm units are not swayed by music signals, they trace without missing the fine movements of the needlepoints.
Unnecessary vibration generated at the needle tip
Mechanical vibration traced by the needle point is converted into electric signal by the generating coil, but this mechanical vibration passes through the stylus, cartridge body, shell and arm, it is reflected at the mechanical contact point and returns to the tip of the needle , It adds extra things to the playback signal. LFTl dumps the vibration from the tip of the needle at the air floating part of the slider, as well as the damping effect of unnecessary vibration from the outside, it becomes a performance like a silent forest.
Pump Unit POU1 (Sold separately)
Pump Unit Air Pulse pump flow highly trusted in medical field
It is an air pump unit for raising AFU1-2. The air pump is driven by 12 VDC supplied from the motor drive unit, and by adopting a motor type pump used in medical equipment etc., it gave stable operation for a long time.
Because the compressed air coming out of the pump is a pulsating flow, it can be supplied as compressed air with no ripple and vibration by Π type filter.
Furthermore, it adopts a sound leakage prevention system with a double sealed structure, and maintains quietness enough even if it installs in the listening room.