Pro-Ject Audio Systems Pro-Ject Xtension 12 Evolution - Manual (Page 7)

© Audio Trade GmbH · Pro-Ject X tension 12 Evolution / X tension Ortofon RS-309D/AS-309S · Revision 2012.8.1
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Ortofon RS tonearms
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Cartridge downforce adjustment (Ortofon RS tonarms)
Remove the transport lock (3) from the tonearm. Store it in the original packaging so they are available for
any future transportation. Set the knob (5) to 0.
Place the counterweight (7) halfway along the counterweight support rod at rear of arm, being sure to have
the counterweights (7) securing screw uppermost. Lower the armlift and position the cartridge in the space
between tonearm rest (3) and platter. Carefully move the counterweight (7) along the support rod, until the
armtube (2) balances out. The arm should return to the balanced position if it is moved up or down. Do not
forget to remove the cartridge protection cap if fitted.
With the power off, and the platter static, place the supplied stylus pressure gauge onto the platter.
Carefully lower the armlift and position the tip of the stylus on the pressure gauges measuring tongue. The
downforce will be displayed digitally.
Adjust the Downforce, using the knob (6), to the cartridge manufacturer's recommendations. This adjustment
must be done with the tonearm resting on the tonearm rest (3). Finally secure the counterweight with the
securing screw (7).
The counterweight (7) supplied is suitable for cartridges weighing between 18 - 40g.
Please note: Adjust the downforce prior to setting the anti-skating compensation.
Anti-skating force adjustment (Ortofon RS and AS tonearms)
The anti-skating force must be adjusted corresponding to the downforce. Rotate the knob (5) to adjust the
Anti-skating force. One mark on the scale represents 5 mN (= 0,5g / 0,5 Pond) of downforce.
Adjusting the vertical tracking angle -vta- (Ortofon RS and AS tonearms)
Put a record on the platter. When the needle is lowered into the record groove and the tonearm is not resting on
the tonearm rest (3), the surface of the cartridge body should be parallel to the surface of the record.
If it is not loosen the hexagon screw in the tonearm base (8 RS tonearms or 7 AS tonearms) just enough to
allow vertical movement of the arm pillar without force and slide the arm up or down until it is parallel.
Carefully retighten the hexagon screw without applying excessive force (which would deform the arm pillar) –
finger tight is quite sufficient.
1 Detachable headshell with finger lift
2 Tonearm tube
3 Tonearm rest and removable transport lock
4 Tonearm lift lever
5 Anti-skating force adjustment knob
6 Downforce adjustment knob
7 Tonearm counterweight with securing screw*
8 Tonearm base
Stylus pressure gauge (not shown) *