View Full Version : New 2.1.x firmware release for Tortuga LDR passive preamps

02-03-2015, 16:17
After a ton (perhaps a few tons) of work, we are pleased to finally release the latest version of our LDR preamp controller firware that was developed as part of the V2.1 version of the LDR3x Preamp Controller Board.

This Rev 2.1.x firmware now includes both adjustable impedance as well as a greatly improved auto-cal algorithm. You can read more about it via this article: http://www.tortugaaudio.com/ldr-passive-preamps-with-adjustable-impedance/

For convenience I've quoted the essential top lines below.

We've been shipping versions of this new firmware with our products starting back in January but we didn't want to formally release it and make it available to existing V2/preamp customers until such time as we felt it had a chance to mature.

Morten :D

March 1, 2015 - Tortuga Audio has released a major firmware update for its LDR Passive Preamp product line allowing the user to change the input impedance of their LDR passive preamp. This firmware update also includes an upgraded auto-calibration algorithm resulting in improved sound stage and stereo imaging.

The Adjustable Impedance feature allows the user to set up 5 different impedance settings, each between 1k and 99k, with setting #1 currently set up at 20k by default.

All Tortuga Audio preamp products shipped starting January 1, 2015 include some version of the updated 2.1.x firmware. This firmware update is also available to all existing owners of the V2 and V2.1 versions of the LDR3x passive preamp controller board as well as all passive preamp products equipped with a USB socket. Version 2.1.7 is considered the most complete, stable and reliable version as of this edit. Owners are encourage to upgrade to this version.

The latest firmware file plus the required PC compatible bootloader program (not available yet for MACs) can be downloaded from here. Detailed instructions can be found there as well. The specific remote command sequences needed to adjust impedance can be found here in our online documentation.