Grimm TPR (by the metre)

Balanced audio cable by the metre

The Grimm TPR (Twisted Pair Reference) cable has become a benchmark for high-end cables in the studio and in hi-fi.

Grimm Audio cables are developed on a scientific basis. Their design aims for high immunity to radio frequencies and low microphonics. The perfect symmetry of the cross-section and the heavy shielding contribute to very high RF immunity. A special interface layer under the shield and other construction details reduce microphonics even further.

The TPR delivers a natural, uncoloured transfer at a very reasonable price. Its 110-ohm characteristic impedance also makes it compliant with the AES/EBU digital standard.

Specifications

• Capacitance between inner conductors: 33 pF/m
• Capacitance between inner conductor and shield: 52 pF/m
• Loss at 1 MHz: 0.02 dB/m
• Loss at 10 MHz: 0.06 dB/m
• Loss at 100 MHz: 0.25 dB/m
• Resistance: 0.19 ohm/m (0.085 per conductor)
• Shield coverage: 89%
• Conductive polymer coverage: 100%
• Microphonics per Mil C17: 2 mV-pk
• Open-circuit microphonics: 50 nV/Pa (source impedance is the cable capacitance)
• Characteristic impedance: 110 ohms
• Minimum bend radius: 55 mm
• Cable diameter: 5.5 mm
• Conductor size: 24AWG
• Weight: 40 g/m

Why I recommend this audio cable