LDR3.V25 Passive Preamp
This is a legacy product and is no longer produced or sold by Tortuga Audio.
The LDR3.V25 is a complete 3-input, 2-output single-ended passive preamp built around Tortuga Audio’s V25 preamp controller board — at the time, the most advanced LDR controller Tortuga Audio offered. Sonic performance matches many high-end audiophile preamps at a fraction of the cost.
The LDR3.V25 uses a brushed anodized aluminum front panel and high quality Cardas RCA jacks, with high quality hookup wire throughout.
| The LDR3.V25 is built around the V25 preamp controller board in a finished 3-input/2-output enclosure, so that page is the full technical reference for this preamp: attenuation range, LDR calibration, and adjustable impedance; day-to-day operation via the Apple remote, front-panel encoder, and OLED display menu system; the board’s 7-segment vs. OLED display options and hardware revisions; and external automation control over UART, including the full command set. The specifications table there applies directly to this preamp. |
| A lower-cost LDR3.V25K kit version of this preamp was also available, sonically identical but with an acrylic front panel and generic RCA jacks in place of the finished unit’s anodized aluminum and Cardas jacks. |
Menu-driven OLED display
The LDR3.V25 uses Tortuga Audio’s menu-driven graphic OLED display, making the preamp easy to set up and control via its interactive menu system and the 7-button Apple remote.