ORTOFON SPU 1S

Moving Coil Cartridge with Spherical Stylus

The SPU #1 S represents a refined interpretation of moving coil technology, designed to deliver a complete and immersive sound experience in the playback of stereo recordings, ranging from classic historical pressings to contemporary productions. Intended as an entry-level model into the SPU world, it appeals both to enthusiasts seeking authentic sound and to newcomers, thanks to its balanced combination of quality and price.

Equipped with a spherical stylus profile, it ensures stable and natural groove tracking while preserving the tonal integrity of the recordings. The cartridge body is crafted from a combination of ground wood and resin composite, materials chosen for their acoustic and mechanical properties, while the armature windings and terminals are made of high purity copper, guaranteeing clean and precise signal transmission.

The universal connector allows easy installation on a wide range of tonearms with standard SME mounts, such as the Ortofon Reference series. When paired with MC transformers like the ST-7 and reference tonearms, the SPU #1 S fully expresses its sonic identity: a rich and full-bodied musical image, impressive channel separation, and minimal intermodulation distortion. It is an extremely versatile cartridge that retains the spirit of the original SPUs and makes it accessible to a broader audience without compromising on quality.

Technical Specifications:

• Channel balance at 1 kHz: 1.5 dB
• Output voltage at 1 kHz, 5 cm/sec: 0.18 mV
• Channel separation at 1 kHz: 20 dB
• Frequency response 20 Hz - 20 kHz: 3 dB
• Tracking ability at 315 Hz: 60 µm
• Compliance, dynamic, lateral: 10 µm/mN
• Stylus type: Spherical
• Stylus tip radius: R 18 µm
• Tracking force range: 3.0-5.0 g (30-50 mN)
• Recommended tracking force: 4.0 g (40 mN)
• Tracking angle: 20°
• Internal impedance, DC resistance: 2 ohm
• Recommended load impedance: 10 ohm
• Coil wire material: High Purity Copper (OFC)
• Cartridge body material: Ground wood and resin composite
• Cartridge colour: Matte black
• Cartridge weight: 28 g