SONIC ART SA330 TONEARM STAGE 1

$890.00

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Sonic Art SA330 Tonearm STAGE 1

The Sonic Art tonearm is back! Decades ago we started producing a modified RB250/300 tonearm for lovers of vinyl- in this case the SA300. From the beautiful cast alloy tapered arm tube and simplistic design came the basis of what was a great sounding arm at a budget price. The old RB300 featured a built in VTF adjuster by way of coil spring in one side of the arm tube bearing assembly, many believed this caused resonance and it was recommended to set it to zero, (some users even removed the spring) and set the VTF by conventional means of a force gauge. While I wouldn’t go so far as to remove the spring, you can set it to zero force and then dampen the coil pack with some carefully placed felt strips which is then fully reversible!

The current model OEM arm uses a 3 point mounting system but retains the basic steel end stub and painted steel weight. The rear of a Rega arm is extremely important as the counterweight represents the highest mass of the arm which affects the arms performance significantly. As your cartridge tracks its way through the grooves of your record it sends micro vibration up the tonearm tube, some of this vibration sinks into the base of the arm but much of it travels into the end stub/counterweight assembly where it is reflected back down the arm tube, not the most ideal situation for extracting fine detail.

So the first task is to remove the steel end stub and add an end stub to the arm that is like an extension of the arm tube itself, incredibly rigid yet at the same time  decoupled. We have done this using high grade non ferrous metals. Our end stub is not screwed into the arm tube like the factory & most aftermarket stubs, our end stub butts up against the back of the arm tube much like the old OL stubs did, with minimal surface area interaction (decoupling it) and is torqued into place with a thin stainless bolt that screws into a brass insert in the back of the arm tube. We end up with an essentially rigid arm tube, yet decoupled where the counterweight mounts. We then add a solid machined brass counterweight, close tolerances and rigidly clamped to the stub via a set screw, the sonic characteristics of the brass sink the unwanted vibrations from the arm tube. We use premium materials for all components, Australian brass and alloys.

PHOTO SHOWS SA330 WITH OPTIONAL VTA MOUNT FOR 23-25mm HOLES

The result is a significant step up from the stock arm, every aspect of performance benefits, and all at a very affordable price.  With the 3 point mounting system the arm is easy to fit to most tables. We are looking to  manufacture our own VTA spacers to suit the 3 point mount. We are also manufacturing a machined alloy mount that will convert any 3 point mounting arm to a 23mm threaded tube mount like the old RB250/300 used to be. This will be available soon, it will have the standard 23mm diameter thread and a threaded VTA ring for adjusting arm height.

NOTE: While arms are usually in stock, we may not have one finished, please allow 3-5 days for your arm to be completed and shipped if this is the case.

 

 


This product was added to our catalog on Monday 21 September, 2020.

  • Shipping Weight: 1kgs
  • 1 Units in Stock
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