Name: Korf TA-SF9R Series II Tonearm
Brand: Korf
SKU: 6371edb6dc67010022084402
Price: 22800.0 HKD
Availability: OutOfStock

Korf TA-SF9R Series II Tonearm

所有唱臂產品不包括唱頭

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Description

What Makes Our Tonearms Better?

Strength

High rigidity is the single best prediction of great audio performance in tonearms and headshells.

Our measurements consistently support that.

Low resonances
(but no elastic damping)

Tonearm's resonances can reach up to 0.5G! They are clearly audible. Removing resonances removes distortion, coloration, ringing and sibilance.

Elastic damping doesn't magically "erase" resonances. It stores, transforms and releases the energy back, killing the sonics.

Quality of Motion

The bearings ring. The bearings chatter. The bearings stick and then slap. This is heard as grain, and impairs the tracking performance.

We designed our tonearm around radically different bearings. How different? A video is surely worth a 1000 words.

Radically Different Design:

Flexure Pivot Horizontal Bearing

Monolithic flexure pivots are almost a hundred times more expensive than the usual rolling bearings. For that, you get amazing advantages:

Zero starting torque/no stiction
No bearing chatter
Great tracking of warps
Less inner groove distortion
Lasts forever — no servicing, no lubrication
Not influenced by temperature/humidity/dust/age
Easy to replace if broken

What does a flexure bearing sound like? Smooth! Once you experience a tonearm that is free of bearing chatter, you will recognize the chatter's sonic signature in other designs.

Steel Arm Tube

Based on a large study of arm tube materials, we chose a steel tube with 0.5mm wall thickness.

High bending resistance: 3 times higher than aluminium, 2 times higher than titanium of the same mass
Low energy storage

Why is steel seldom used in today's tonearms? It's not possible to simply replace an aluminium or titanium arm tube with a steel one. A whole new design is called for.

Widely Spaced Vertical Hybrid Ceramic Bearings

We did a study of vertical bearings's influence on sound, and chose hybrid ceramic rolling bearings for the task:

Better strength and precision
Less chatter compared to closely spaced bearings
Low starting torque/stiction
Better resolution
Sharper dynamics
Better sibilance control
Less inner groove distortion
Need no servicing or lubrication

Clamping Plinth Mounts

For tightest plinth attachment possible. They give:

Better mounting precision
Ease of adjustment
Better plinth coupling

Clamping mounts are quite expensive to make. This is probably why most other tonearms are held by imprecise and fiddly set screws instead.

Magnetic Antiskating

Magnetic antiskating has zero stiction.

It would be a real shame to spend so much effort (and money) on our beautiful bearings, and then ruin their performance with a weight on a pulley. Or with a sliding lever.

Our magnetic antiskating is calibrated and uniform—the biasing force remains the same from the outer to the inner grooves.

Custom Headshell Connector

To fully preserve the mechanical performance of both our unique ceramic headshell and the armtube, we designed our own connector:

Steel load-bearing part; aluminium alloy locking collar
Press-fitted into an armtube
Spring loaded, gold plated contact pins
Nylon isolator

Radically Easy to Use

High performance tonearms are often hard to set up and require tools to do so. We made ours as easy to use as any mass market tonearm—all while preserving the performance.

Soft dampened action
Height adjustable with a set screw

Column clamp is tightened and released with a 3mm hex key
VTA thumbwheel for repeatable adjustment (can be removed if not needed)

Numbers correspond to downforce setting

Tonearm lift

Vertical adjustment

Antiskating setting wheel

Precision headshell connector

Clockwise to tighten
Counterclockwise to release

Azimuth adjustment

Unscrew to adjust, tighten to set
Azimuth marker to visually check the setting

Screw-on counterweight

Rotate to adjust downforce
No set screws, no thumb screws
Helpful 0.5 gram (quarter turn) marks
Additional counterweight simply slides in (or out)

Arm rest

Easy friction lock
No moving parts

Specifications

Pivoting gimbal tonearm with removeable headshell
Effective length	229 mm
Pivot to spindle distance	214 mm
Offset angle	22°
Effective mass without headshell	18 g
Effective mass with HS-A02 headshell	28 g
Horizontal axis bearing	Flexure pivot
Vertical axis bearings	Ceramic hybrid rolling bearings
Armtube material	Stainless steel
Headshell connector	Ortofon/SME/JIS type
Balance type	Static
Minimum mass of headshell and cartridge combination	10 g
Maximum mass of headshell and cartridge combination	35 g
Cable connector	5 pin MDIN, male
Internal wiring	Cardas
Mounting types	JIS/Linn (min. Ø28 mm hole), SME
Mass without headshell and mounting collar, max	350 g

Measurements

Here's a comparison with the "standard" removeable headshell tonearm, the Jelco SA-750D/Jelco HS-25 combination.

The accelerometer is attached to the top front of the headshell, and the vertically modulated 0 to 20 kHz sweep recording is played. The output from the accelerometer is conditioned, amplified and converted to g. We're keeping our tradition of using the Audio Technica AT7V cartridge for the vibration measurements.

Owner's Manual Download

Terms and Conditions

Shipping

We will ship your purchase worldwide from Klosterneuburg, Austria. Shipping and handling is at cost.

If you are outside the EU, we cannot promise that you will or will not have to pay your country's import taxes and duties.

Returns

If you aren't satisfied with your purchase for any reason whatsoever we will gladly take it back within 40 days from the date of delivery.

There is no charge for restocking If you return all items in the original packaging. If you are in the EU we will cover the return shipment costs.

1 Year Warranty

We will replace anything you bought from us free of charge if it fails due to manufacturing defects within 1 year from the date of delivery.

Safe and Secure

We will keep your data as secure as we can and will not do anything with it without first getting a permission from you. If you don't want us to store your data any more (for example, your email address), just let us know and we will delete it straight away.

We would never sell your details to any marketer. Period, no exceptions.

Quality Engineering

We only offer things that we have designed ourselves, and that are manufactured to our specifications under our control.

We do not re-badge someone else's products to sell them as our own.

Real People, Real Opinion

All product endorsements you see on our site and in our advertising are from real people who enjoy their Korf Audio products.

Korf Audio would not exist without free exchange of sincere opinion on the internet. We do not post any promotional content pretending to be a personal opinion on any public forum.

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Korf TA-SF9R Series II Tonearm

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