Ortofon SPU GTX-S / SPU GTX-E Moving Coil Stereo Cartridge

SPU GTX S, and SPU GTX E Stereo Phono Cartridge, by Ortofon.

The SPU GTX takes the iconic Ortofon SPU design but adds some clever technology to make it more durable and more relevant for modern listeners than ever before.

SPU GTX cartridges are hand-built in Denmark. Their unibody housings are moulded in one piece from a specially selected glass-fibre reinforced co-polymer, never before used for SPU cartridges. This ensures a stable, rigid, and low-resonance housing for the sensitive generator system. The bottom cover is moulded from the same body material and encapsulates the engine for added safety and increased rigidity.

Despite its Moving Coil (MC) generator system, by integrating a step-up transformer within the SPU GTX body, the cartridge can be connected directly to any standard phono stage or amplifier as if it were a Moving Magnet (MM) cartridge. When developing the GTX series, Ortofon chose to develop a new step-up transformer in collaboration with Lundahl Transformers. Lundahl is known for their expertise in audio transformers and is a perfect partner for Ortofon on this project.

SPU GTX cartridges offer the best of both worlds, combining the musicality and rich tonal character that has defined Ortofon’s SPU series for decades with the latest innovations in audio technology.

The SPU GTX S uses a spherical diamond tip, while the SPU GTX E employs an upgraded elliptical diamond tip.

Features

• Glass-Fibre Reinforced Co-Polymer Cartridge Housing.
• Moving Coil (MC) cartridge design.
• Built-in transformer also allows connection to a Moving Magnet (MM) input.
• Spherical diamond stylus (GTX-S)
• Elliptical diamond stylus (GTX-E)

Specifications

• Output Voltage: 4 mV
• Channel Balance (@ 1000 Hz): 1.5 dB / 20 dB
• Frequency Response: ±3 dB
• Tracking Ability (@ 315 Hz at Recommended Tracking Force): 60 μm
• Compliance, Dynamic, Lateral: 10 μm
• Recommended Tracking Force: 4.0 g
• Internal Impedance: 610 Ω
• Recommended Load Impedance: 47000 Ω
• Recommended Load Capacitance: 150 - 600 pF
• Cartridge Weight: 38 g
• Stylus Type: Spherical (GTX-S) or Tipped Elliptical (GTX-E)
• Stylus Tip Radius (r/R): 18 μm (GTX-S), 8 / 18 μm (GTX-E)

More Information

• SPU GTX E, by Ortofon
• SPU GTX S, by Ortofon