Fidelix 0 SideForce tonearm

Pure straight arm that overwhelms the clarity, strength, and depth of bass instruments: 0 SideForce

Fidelix 0 SideForceis an innovative tonearm that sets a new standard for analog playback. We tackled the fundamental problem of "time axis fluctuation due to side force" that conventional tone arms could not avoid,Pure straight constructionWe solved this with our own mechanism.

This design philosophyAwarded “MJ technology of the year” and “analog Grand Prix”Its contribution to sound quality is widely recognized.

Eliminate fluctuations in the time axis and unleash true bass

With conventional offset arms, the frictional force of the record (which changes depending on the volume) creates complex left and right movements, causing a delay in the rise of the sound and dullness.

• Time axis accuracy: 0 SideForce's pure straight structure eliminates this ``time axis fluctuation'' by placing the cantilever in a straight line with the arm fulcrum. This design leverages our knowledge of jitter countermeasures in digital audio.
• Overwhelming low range: As a result, bass instruments are played with such force and depth that they seem to be crawling on the ground, overwhelming the listener with the clarity, power, and depth of the low frequencies.
• Direct feeling and clarity: Reviewers say, ``I'm surprised by the clear, eye-opening sound. It comes through well,'' and ``The direct feel is different.'' They even go so far as to say, ``If this is the sound of the correct arm, then all the other arms are defective.''

Zero side force mechanism that eliminates the need for anti-skating

This machine does not require a general anti-skating mechanism (canceller).

• Automatic balance mechanism: Even if side force is generated, the arm automatically balances itself by horizontal movement and always converges to virtually zero.
• Stable needle tip operation: This eliminates the problem of fluctuations in the time axis caused by fluctuations in side force, resulting in extremely stable needle tip movement.

High-precision support structure and MITCHAKU head shell

SUS304 and jewel bearing: The arm body uses **Hard stainless steel (SUS304)**, which is extremely difficult to process, and combines it with a high-precision fulcrum structure using jewel bearings.

• 1.01 point structure: Although it is basically a one-point type, it uses a ``1.01 point structure'' that prevents side-to-side shaking by installing a weight under the fulcrum. During performance, the three points of the stylus, fulcrum, and weight exhibit extremely clear behavior, and were also used in famous instruments of the past.High-FidelityThe design has been revived in modern times.
• Accessories: As an accessory, a ``MITCHAKU head shell'' that is closely integrated with the tone arm is included as a standard accessory (MITCHAKU-L for the long version).

Compatibility and ease of adjustment

The mounting position corresponds to 232mm (normal specification) from the turntable center, and is designed with consideration for compatibility with existing turntables such as FR-64 (230mm) and WE-308 (235mm). Adjusting the stylus pressure is also easy with 3g per rotation and $0.5\text{g}$ per scale.

An arm that correctly aligns the time axis of analog records and unleashes true bass.

0 SideForce is an arm that delivers unambiguous, powerful bass and clarity of the sound image, and unlocks the true time axis accuracy engraved on analog records.

I became convinced that this is the "correct" way to enjoy analog playback.

I had been strongly interested in the design philosophy of FIDELIX's “0 SideForce” even before installing it. I was particularly impressed by the comment explaining the essence of the pure straight arm: **"Rather than the increase in tracking error, the accuracy of the time axis ensured by the cantilever pivot not swaying is what's important for sound quality."** I felt compelled to verify this overwhelming sonic advantage, which more than compensates for the disadvantage of inner groove distortion, on my own system.

I found the idea of buying a new turntable just to swap the arm cumbersome, but upon discovering that it could be installed on my existing DENON DP-900M, I immediately decided to go ahead. According to FIDELIX's specifications (mounting pitch 232mm, hole diameter 30mm), the DP-900M’s actual measurements matched perfectly in terms of pitch, and while the hole diameter was 5mm larger, it posed no issue for installation. Moreover, the automatic arm lifter “The Q UP” operated flawlessly, so I had no practical concerns.

The difference in directness changes everything

The first impression when I replaced the arm and played sound was shocking. I was amazed at the **"stunningly clear sound" and "excellent openness"**, and the sense of directness of the sound is incomparable with conventional tonearms. The accuracy and power of this sound were so remarkable that I even felt, "If this is the correct sound of an arm, then all the other arms I’ve used must have been defective," completely overturning conventional wisdom about analog playback.

0 SideForce is not just a component, but a valuable upgrade that teaches the "truth" of audio.