The DM1 display module has been discontinued and replaced by the graphic OLED display assembly.
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.
Overview The IO3 (input/output) Relay Board (the “IO3”) is a 1.7 inch x 2.5 inch circuit board that can be interfaced with the LDR3x Preamp Controller Board (versions 1 or 2) to enable switching between up to 3 audio input signals. In addition to its primary switching function, the IO3 also serves as an overall interface…
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: Click Here For More Technical Info on the HiZ Upgrade Does This Upgrade Apply To My LDR3x? …
The Tortuga Audio remote has been discontinued and is no longer available. All Tortuga Audio LDRx preamp products can be controlled via the elegantly designed Apple Remote which can be purchased from our website store or numerous other online stores plus brick-and-mortar stores.
Beautiful Cardas GRFA Long RCA jacks. They are made of non- magnetic, eutectic Brass with Rhodium over Silver plate. Sold only in pairs.
The dual USB port is ideal for building a DIY balanced preamp with a pair of Tortuga Audio’s V25 Preamp Controller. The dual USB port uses a single XLR-A panel cutout to provide separate USB connections to each of the V25 boards for firmware updates. Connection between the dual USB port and each V25 board is via a 12-inch 5-pin cable. Two (2) such cables are included with the port module.
All Tortuga Audio preamp products can be controlled remotely via the highly affordable and elegantly simple Apple Remote. As of May 1st, 2014, the Apple Remote replaced the previous offered Tortuga Audio legacy remote.
A set of four pairs of 100 ohm and 100k ohm precision (0.1% accurate) resistors mounted in four removeable modules that allows the owner of Tortuga Audio’ s LDR3x V2 & V2.1 Passive Preamp Controller Boards to perform a specific pre-calibration sequence to improve the overall accuracy and performance of their preamps.
This is a high precision, low noise upgrade to the auto-calibration (auto-cal) op amp used in the V2.1 version of the LDR3x Passive Preamp Controller.
The current op amp upgrade is the Burr-Brown (TI) OPA4251 quad op amp. This is a very low noise op amps with 120 db power supply rejection ratio.
The benefits of this upgrade include:
1) Ability to power the LDR3x.V2.1 board with up to 30 VDC supply voltage (vs. stock ~12 VDC)
2) Improved overall accuracy of your V2.1 preamp’s attenuation and channel balance which is critical to sound stage and stereo imaging
3) Improved speed, accuracy and reliability of the auto-cal process.
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.
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