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The Tortuga Audio LDRx Passive Preamplifier is a 3-input, 2-output single-ended audiophile preamp built with 3rd generation auto-calibrating LDR technology and adjustable input impedance. It uses software-driven digitally controlled passive resistive analog attenuation with audio grade LDRs in a series/shunt topology, offering colorless clarity and articulation that rivals top-end active preamps costing much more. The LDRx features an input impedance floor of nominally 10k ohms, fully self-contained auto-calibration of the analog LDRs over a 60 dB attenuation range, and no relays in the audio signal path for input switching. Control is via an Apple Remote and a multifunction encoder on the front panel, with status displayed on dual numerical displays. Software updates are possible via a USB port. The unit is housed in a stylish black anodized aluminum enclosure with bamboo side panels and is handmade in the USA. It includes rhodium over silver plated copper Cardas jacks with optional Neotech 26AWG UP-OCC solid silver wiring in the signal path. The power supply uses a toroidal transformer with EMI/RFI filtering and switch mode DC-DC regulators for quiet, stable control power. The LDRx is known for its colorless, transparent, and high-resolution sound quality with excellent dynamics and musicality. Replaceable LDR modules ensure long-term value, with an estimated LDR life expectancy of over 50,000 hours. The LDRx
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The L10 Dual Monaural Line's output impedance is 0Ω against the LDRx Passive's 10Ω and its input impedance 94Ω against 10Ω.
The MicroZOTL's output impedance is 2Ω against the LDRx Passive's 10Ω and its input impedance 50Ω against 10Ω.
The Jazz's output impedance is 50Ω against the LDRx Passive's 10Ω and its input impedance 75Ω against 10Ω.
The icOn 4U's output impedance is 30Ω against the LDRx Passive's 10Ω and its input impedance 30Ω against 10Ω.
Soulution 326
Constellation Audio Inspiration 1.0
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