Comprehensive Passive Preamp Kit
The LDR3.V2K is an affordable comprehensive 3 input, 2 ouput single-ended passive preamp kit that includes all the parts needed to assemble a complete audiophile grade passive preamp including enclosure, RCA jacks, power supply, remote etc. The kit is substantially identical to the finished LDR3.V2 Passive Preamp.
State of The Art LDR Based Technology
The kit is designed around Tortuga Audio’s latest version of the LDR3x Passive Preamp Controller Board – the V2.1. This is the same core board that Tortuga Audio is using in all of its LDR passive preamp products.
High Quality Enclosure
The kit uses the same high quality uni-body extruded aluminum box used in Tortuga Audio’s current LDR3.V2 and LDR1B.V2 finished preamps. The front panel is 0.25″ thick smoke gray see-through acrylic behind which you mount either the dual display modules. The rear is a brushed anodized aluminum panel with milled openings for all audio and power connections including the RCA jacks and a USB connection for firmware updates.
Ready To Use Circuit Boards
The circuit boards in this kit come already fully assembled and tested. You do not need to solder individual components into circuit boards. Assembly and point to point wiring is all that is required.
Included In Kit
|1||LDR3x.V2.1 Passive Preamp Controller Board|
|1||2.95" x 6" x 8" black powder coated extruded aluminum enclosure box|
|1|| 0.25" x 2.95" x 6" see-through dark acrylic front panel with hole/recess for encoder and knob|
|1|| 0.08-0.10" x 2.95" x 6" black anodized rear panel with cut-outs for jacks, etc. |
|1||knurled black enameled Fender Telecaster style encoder control knob|
|4||peel'n'stick urethane rubber feet|
|10||standard gold plated brass RCA jacks|
|1||DC power jack|
|1||12 VDC Trigger Out phono jack|
|8||sets of socket head black oxide sheet metal screws with washers (for front/rear panel)|
|1||external "wall-wart" or "brick" style external 12VDC power supply suitable for 120 or 240 VAC|
|1||3 input relay switching board - IO3|
|1||ribbon cable for connecting the input relay board to the LDR3x board.|
|1||4 conductor cable for connecting the encoder to the display module|
|1||ribbon cable for connecting the display module to the LDR3x board|
|1||rotary encoder module with nut and washer|
|1||master display board |
|1||slave display board|
|1||display module mounting bar - plastic angle|
|4||sets of nylon threaded rods with nuts & washers for the master display module mounting bar|
|1||ribbon cable for connecting master display module to slave module|
|1||USB cable for connecting between the LDR3x board and the rear panel|
|10||feet of white #24-26 gauge silver coated copper wire (audio hookup)|
|1||foot of red #20 gauge silver coated copper wire (power hookup)|
|1||foot of red #26 gauge silver coated copper wire (trigger hookup)|
|1||foot of black #20 gauge silver coated copper wire (power hookup)|
|1||foot of black #26 gauge silver coated copper wire (trigger hookup)|
|3||foot of green #20 gauge silver coated copper wire ( audio ground hookup)|
|1||0.060" x 5.7" x 8" FRP mounting board|
|6||#4 threaded hex stand-offs for mounting the LDR3x, input board and ground bar to mounting sheet|
|12||#4 screws for the mounting standoffs|
|2||#4 screws for the mounting display bar to board|
|2||#4 nuts for mounting display bar to board|
|1||IR Receiver module - to be soldered into the display module|
|10||Cardas RCA jacks|
|10||feet of Neotech 26AWG UP-OCC Solid Copper wire|
Things You Really Need – Not Included In Kit
- Soldering iron
- Allan wrench for socket head screws
- Drill & drill bit for drilling holes in the mounting sheet and mounting bar.
- Wire strippers for stripping insulation off wires
- Wire cutters for cutting wires to length
- Small screw drivers (both regular and phillips) for screw terminals, encoder knob etc.
Things You Really Should Have But Can Probably Get Away Without
- A volt-ohm multimeter
Presently we only have rudimentary assembly instructions that can be found in our online documentation page. In the future we plan on having more detailed instructions with both photographs and video.
We strongly encourage you to review the available assembly instructions and decide for yourself if you are comfortable taking on this kit given the current level of assembly instructions.
- RCA Jacks
- Upgrade to Cardas RCA jacks
- Power Supply
- 120 VAC (domestic) – 12 VDC 0.5 amp linear regulated external “wall-wart” style power supply – 2.1mm pin (positive)
- 240 VAC (international) – 12 VDC 1.0 amp switching power supply “brick” with detachable IEC power cord with US AC plug – 2.1mm pin (positive)
- Hookup Wire – Neotech 26AWG UP-OCC Solid Copper