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RPM 9.1 Acryl

  • Model: Pro-Ject RPM 9.1 Acryl
  • Shipping Weight: 12.5kg


• A quiet running AC motor with a two-step pulley drives the platter's outside edge via a belt.

• The transparent acrylic plinth stands on three height-adjustable Sorbothaneฎ-damped aluminium cones.

• A supplied spirit level allows easy adjustment.

• The motor is mounted in a separate metal housing to eliminate vibration transmission.

• The resonance-optimised platter is a sandwich construction utilising an acrylic platter weighing 3,5Kg and a brass record puck.

• The inverted bearing uses a stainless-steel axle carrying a ceramic ball on which the ceramic bearing plate runs.

• Central metal block optimises centre of gravity and damps main bearing.

• Connection to the phono input of the amplifier can be made with connecting cables of your taste through the gold plated phono sockets and earth screw. A standard cable is provided.

• External power supply avoids potential electro-mechanical interference.

Tonearm Pro-Ject 9cc

• The headshell and armtube are fashioned from a single piece of carbon-fibre.

• Conical armtube avoids standing wave reflections.

• Inverted tonearm bearing comprises four hardened stainless tips in ABEC7 spec ballraces.

• Rings provide very solid arm bearing housings. The outside ring is open to avoid resonances.

• Design of counterweight effectively counteracts unwanted resonances.

• The counterweight supplied is suitable for cartridges weighing between 6 - 10g. Alternative counterweights for cartridges weighing between 11 - 15g, 8 - 11g or 5 - 8g are available as an accessory part.

• Counterweight shaft lowered to record level reduces cantilever forces and dynamic wow when playing warped records.

• Solid armbase permits accurate height adjustment of armtube and VTA (vertical tracing angle).

• Single-screw fixing of armtube allows rotation for easy adjustment of needle azimuth despite fixed headshell.

• Silicone-damped armlift can be adjusted to suit working height of the arm.

• The internal wiring consists of flexible high-purity copper from the headshell right through to the gold-plated phono sockets.

Nominal speeds 33 / 45 r.p.m.
Dust cover Pro-Ject Cover it optional
Record weight yes
Motor in separate housing yes
RCA phono sockets yes
Sorbothane-damped aluminium cones yes
Central metal block yes
Tonearm Pro-Ject 9cc
Carbon-fibre headshell and armtube yes
Effective tonearm length 9" (230mm)
Effective tonearm mass 8,5g
Overhang 18mm
Supplied counterweight cartridge weight 6 - 10g
Optional counterweights cartridge weights 10 - 15g, 9 - 11g, 4 - 6g
cartridge weight 11 - 15g
Downforce range 10 - 30mN
Speed variance ฑ0,5 %
Wow and flutter ฑ0,06 %
Signal to noise -73dB
Platter weight/diameter 3,5kg/300mm
Power supply type Mains-fed outboard power supply
220 - 240V, 50 cycles or 100 - 110V, 60 cycles
Output voltage 16V/500mA AC
Power consumption 2W
Dimensions 440 x 180 x 325mm
Weight 10,5kg + motor unit 2kg


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