Ortofon SPU #1 (Elliptical)

The Ortofon SPU #1 (Elliptical) is a high-quality phono cartridge for turntables that delivers an exceptional listening experience. Designed by Robert Gundmansen, a 50-year veteran of Ortofon, the SPU was one of the first stereo moving coil phono cartridge models. Since its creation in 1959, the SPU has remained a flagship product in the Ortofon range and has become synonymous with the brand.

Features

• The SPU #1 (Elliptical) is equipped with an elliptical stylus that provides detailed sound reproduction and an expansive soundstage.
• It also features high-purity copper armature windings and terminals, as well as a superior wooden housing.
• The SPU is available in two versions: the SPU #1 S with a spherical stylus and the SPU #1 E with an elliptical stylus.

The Ortofon SPU #1 (Elliptical) is an ideal choice for audiophiles looking to enhance their vinyl listening experience. With its detailed sound reproduction and expansive soundstage, the SPU #1 (Elliptical) offers high-quality sound that has become synonymous with the Ortofon brand.

Technical Specifications

Construction

• Body: Reconstituted wood and resin composite
• Finish: Matte black
• Tip: Elliptical
• Coil: OFC copper (oxygen-free)
• Weight: 28 g

Audio Performance

• Output voltage: 0.18 mV (1,000 Hz, 5 cm/s)
• Frequency response: 20-20,000 Hz ± 3 dB
• Channel separation:
  • At 1 kHz: 20 dB
  • At 15 kHz: 10 dB
• Channel balance at 1 kHz: 1.5 dB

Mechanical Characteristics

• Tip radius: r / R 8 / 18 µm
• Tracking angle: 20°
• Tracking ability at 315 Hz: 60 µm (at recommended tracking force)
• Lateral dynamic compliance: 10 µm/mN

Usage Parameters

• Tracking force:
  • Range: 3.0-5.0 g (30-50 mN)
  • Recommended: 4.0 g (40 mN)
• Impedance:
  • Internal DC: 2 Ω
  • Recommended load: > 10 Ω