light dependent resistors

Plug-in LDR Module

The Evolution of LDR Volume Control

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LDR Volume Control  There’s growing recognition within the community of audio enthusiasts (a.k.a. audiophiles) that LDRs (light dependent resistors) deliver the best sounding volume control technology available today. Over the past 5 years, Tortuga Audio has been leading the charge to evolve and perfect LDR based volume control. In Q2 2017 Tortuga Audio released its fourth generation LDR technology which is included in all of our current passive preamp […]

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Tortuga Audio's high impedance LDR preamp curves

New HiZ Control Software Yields Major Improvement To LDR Passive Preamps

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Better LDR Passive Preamp Sound Tortuga Audio has developed an improved software based LDR control algorithm that greatly improves on our already highly regarded LDRx Passive Preamps. Key aspects of this new “HiZ” (high impedance) control algorithm include: Substantially increased input impedance with a nominal 10k ohm impedance floor Improved sound including better dynamics, musicality and sound stage Compatibility with a much broader range of audio sources and amplifiers

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mono LDR passive preamps

Tortuga Audio Goes To Harvard With Dual Mono Preamps

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The best part of being in the high value audio design and manufacturing business is working with customers who have more interesting ideas than you do. A recent example is when a full professor at Harvard University contacted us and asked if we could provide a pair of mono passive preamplifiers for his home audio rig. Dual Mono Preamps? Yes, mono preamps. As in a two single channel LDR

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LDR3x preamp controller circuit board

Tortuga Audio Plans LDR3X Preamplifier Controller for DIY Community

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As we work to expand our line of next generation  preamp products  built around light dependent resistors (LDRs), we also plan to soon introduce an LDR based preamp controller board, and related products, for the Do It Yourself (DIY) audio community. As we’ve previously announced, Tortuga Audio is actively developing a balanced version of its preamp line – the LDR3B Passive Preamplifier. This development work has led us to

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light dependent resistor gif

Saying Yes To Light Dependent Resistors

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Why Light Dependent Resistors? Why did we design our Passive Preamps with light dependent resistors (LDRs)? Because they sound better than all other options. Better than any potentiometer (“pot”), better than any stepped attenuator, and better even than transformer based volume controls. LDRs have excellent sonic quality and make it possible to have no mechanical components (relays, switches, potentiometers) in the signal path.  They are the ultimate transparent volume

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