Legacy Products (out of production)

The V2 version of the LDR3x has been replaced by the V2.1

Find our more about the V2.1 here. 

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With the V2, you can now build a world class preamp rivaling the best of the best! And with auto-calibration and replaceable LDR modules, your investment in high performance audio will last a lifetime.

The LDR3x.V2 is an a DIY passive preamp controller board designed around light dependent resistors (LDRs) that allows the DIY’er to build a passive or active preamp with exceptional audio performance that can be controlled with a remote.

LDRs are being increasingly recognized by audio enthusiasts as THE best technology for volume control. And Tortuga Audio’s LDR3x.V2 is the most advanced state-of-the-art LDR passive preamp design available.

The ePot.V3 Max (the “V3 Max” or just “Max”) is a chassis mounted electronic stepped attenuator and preamp controller board for the DIYer, designer or OEM. The V3 Max provides 2-channel, 100 step stereo volume control, input switching for up to 6 sources, remote control,  and optional (but highly recommended) high contrast OLED display with a menu driven interactive user interface. The V3 Max is an analog volume control device run by a software driven 32 bit ARM microcontroller. The audio signals are not manipulated in the digital domain. Analog audio signals passing through the V3 are optically isolated from any power source. There is no active gain stage and there is no active output/buffer stage. Each audio signal sees only 2 resistors (light dependent resistors – LDRs). The LDRs control volume by reducing the voltage of the incoming audio signal. By this definition the V3 is inherently a passive volume controller. By itself, the Max can be used as a passive preamp. When mated to a downstream gain and/or buffer stage the ePot.V3 Max becomes the attenuator/controller of a high performance active preamp. The Max is the successor product to Tortuga Audio’s popular LDR.V25 Preamp Controller. The V3 series represents Tortuga Audio’s 5th generation of of audio attenuation technology designed around light dependent resistors (LDRs).

The SSPB.V2 Solid State Preamp Buffer (the “SSPB” or “buffer”) is an elegantly simple high performance solid state JFET buffer with flexible configuration options including an optional op amp input/gain stage and the ability to run the buffer as a pure direct coupled input & output discrete buffer.

The kit is geared towards the audio DIYer who is looking to add a solid state buffer to an existing passive or active preamp to improve performance due to impedance mismatch or are looking to increase system dynamics.

When equipped with a volume controller on the front end (not included in this kit) the combined volume control/buffer becomes an effective active preamp with or without gain.

The kit is supplied as a “bag of bag of parts” and requires assembly via soldering. When fully assembled this buffer kit is a circuit board populated with parts. The kit does NOT currently include an enclosure, interface sockets, jacks, wiring or other items typically needed to build a finished stand alone buffer product. Those items are left to the DIYer to source, assemble and integrate.

The ePot.V3 Mini (the “Mini”  ) is a high resolution panel mounted electronic stepped attenuator that offers exceptional sonic performance with advantages that no mechanical attenuator can match including a high resolution 100 step volume control,  local & remote control, channel balance adjustment, muting and optional menu driven high contrast OLED display.

The V3.Mini enables the audio hobbyist, professional designer or OEM to build or refurbish passive or active audio preamps that rival the performance of some of the best high end preamp equipment available today regardless of price.

While you can purchase the Mini “bare” without an attenuation module, we pre-select a plug-in LDR (light dependent resistor) attenuation module by default but you can opt for a discrete resistor attenuation module instead, or opt for both. The two module types are interchangeable.

The graphic OLED Display Module (sold separately) integrates with the V25 to provides an easy and intuitive user control experience through an interactive menu driven control interface designed around  the 7-button Apple remote.