DIY Preamp Components

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DIY Preamp Components

DIY Preamp Components

LDR V25 Preamp Controller


The LDR V25 preamp controller (the "V25") is a software driven audio volume control and input switching device for high performance passive and active audio preamps.Like its predecessors (the V1, V2 and V2.1 preamp controller) the V25 utilizes light dependent resistors (LDRs) to attenuate volume. Tortuga Audio's LDR based volume control is now in its 4th generation and delivers a level of sound quality that once you experience it you won't want to go back to conventional potentiometers, stepped attenuators or even transformer based volume controls.By itself, the V25 preamp controller board allows the audio hobbyist, professional designer or OEM to build an exceptional passive audio preamp that rivals the performance of some of the best high end preamp equipment available today regardless of price. When mated with a downstream preamp gain stage and buffer, the V25 becomes the heart of a very high performance active preamp.

DIY Preamp Components

LDR Module


The LDR Module is a replacement part for the LDR3x Passive Preamp Controller board. It applies to all versions of the LDR3x board starting with version 2 (the V2).LDR Modules can be easily removed and replaced and plug into any of the four LDR locations on the LDR3x board marked RV1, RV2, RV3 and RV4.It's important to orient the LDR Module properly. The white dot on the LDR Module should be the same side as the white dot on the LDR3x board.Replacing an LDR Module should only be necessary if the LDR3x exhibits a significant permanent shift in channel balance or a channel stops responding to volume changes. If these problems can't be resolved by running an Auto-Calibration cycle or if the LDR3x hangs during an Auto-Calibration cycle, then probably at least one LDR Module requires replacement.

DIY Preamp Components

USB Port & Cable


This 1 foot cable makes it easy to provide an externally accessible USB connection port to update firmware in a LDR3x Passive Preamp Controller located within an enclosure.One end of the cable provides a type A USB port that can be attached via 2 screws to a panel. The other end has 5 pin female header that connects to the J8 5 pin male header on the LDR3x board.For those with a V2 board that already has a micro-USB port board soldered onto the J8 header, you'll need to first remove that board from the J8 header. We recommend this be done by carefully cutting up the micro-USB port around the pins using a plier/cutter and then using a solder iron to remove any remaining materials from the J8 pins. 

DIY Preamp Components

Apple Remote


All Tortuga Audio LDRx preamp products can be controlled remotely via the highly affordable and elegantly simple Apple Remote.As of May 1st, 2014, the Apple Remote has replaced the previously offered Tortuga Audio Remote as our primary remote.

DIY Preamp Components

PS12.5 Power Supply


The PS12.5 Power Supply (the "PS12.5") is a high performance 12 VDC  switch mode dc regulated power supply  for powering the LDR3x Preamp Controller Board (versions 1 or 2) or any other audio device that can benefit from up to 800 mA of clean 12VDC and/or  5 VDC power.  The PS12.5 can be configured to run off of either a 115 or 230 VAC source.Although the PS12.5 can be configured to provide 12 VDC, 5 VDC or both, please note that the LDR3x.V2 board only requires 12 VDC.


DIY Preamp Components

Cardas RCA Jacks (pair)

$31.04 $24.83

Beautiful Cardas GRFA Long RCA jacks.  They are made of non- magnetic, eutectic Brass with  Rhodium over Silver plate. Sold only in pairs.

DIY Preamp Components

DM1 Display Module


The Display Module ("DM1") is a 1.8 inch x 1.8 inch, 2 digit, 7-segment numerical LED display board that can be interfaced with the LDR3x Preamp Controller Board to provide numerical/visual feedback of volume level and status of the LDR3x.

DIY Preamp Components

Encoder Module


The encoder module is a rotary encoder with integral push button mounted on a small PCB with a 4-pin header and an 8 inch 4-pin cable . It comes fully assembled and ready to use. The pin header connections are labeled as follows: A – leg A of the encoder (terminates to J2-EA on the […]