LDR1B.V2K Balanced Passive Preamp Kit
Price: $1,095
This is a legacy product and is no longer produced or sold by Tortuga Audio.
| This V2-generation kit was eventually replaced by the LDR1B.V25K kit, built around the newer V25 preamp controller. |
The LDR1B.V2K is a complete single-input balanced passive preamp kit, substantially identical to the LDR1B.V2 Balanced Passive Preamp. The kit includes everything needed to assemble a complete audiophile grade balanced passive preamp: enclosure, front/rear panels, dual visual displays, XLR jacks, power supply, manual encoder/knob, remote, and wire.
State-of-the-art LDR-based technology
The kit is built around a pair of LDR3x.V2.1 preamp controller boards — the same core board Tortuga Audio used in all its LDR passive preamp products at the time.
High quality enclosure
The kit uses the same uni-body extruded aluminum enclosure used in the finished LDR3.V2 and LDR1B.V2 preamps. The front panel is 0.25" thick smoke-gray see-through acrylic, behind which the dual display modules mount. The rear is a brushed anodized aluminum panel with milled openings for all audio and power connections, including the XLR jacks and a USB connection for firmware updates.
What’s included
| Qty | Item |
|---|---|
2 |
LDR3x.V2.1 preamp controller boards |
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, cut for the encoder and knob |
1 |
0.08-0.10" x 2.95" x 6" anodized rear panel, cut for jacks |
1 |
Knurled black enameled Fender Telecaster-style encoder control knob |
4 |
Peel-and-stick urethane rubber feet |
6 |
Neutrik XLR jacks (1 pair female, 2 pair male) |
1 |
12 VDC power jack — 2.5mm barrel, 2.1mm center pin |
1 |
12 VDC trigger-out phono jack |
8 |
Sets of socket head black oxide sheet metal screws with washers (front/rear panel) |
1 |
"Wall-wart" style external 0.5A power supply, 120 or 240 VAC |
1 |
Ribbon cable, encoder to display module |
1 |
Ribbon cable, display module to LDR3x board |
1 |
Rotary encoder module with nut and washer |
2 |
Display boards (master & slave), fully assembled, with master-to-slave ribbon cable |
1 |
Display module mounting bar (plastic angle) |
4 |
Sets of nylon threaded rods with nuts & washers, attaching display modules to mounting bar |
2 |
Sets of screws with nuts, attaching the mounting bar to the mounting board |
2 |
USB cables, LDR3x boards to rear panel |
10 ft |
White #24-26 gauge silver-coated copper audio hookup wire |
1 ft |
Red #24-26 gauge silver-coated copper wire (power hookup) |
1 ft |
Black #24-26 gauge silver-coated copper wire (power hookup) |
1 |
0.060" x 5.7" x 8" FRP mounting board |
10 |
#4 threaded hex stand-offs (mounting the LDR3x boards and star ground bar) |
18 |
#4 screws for the mounting stand-offs |
1 |
Apple remote |
1 |
IR receiver module, to be soldered into the master display module |
What you’ll need that isn’t included
-
Solder
-
Soldering iron
-
Allen wrench for socket head screws
-
Drill and drill bit, for the mounting sheet and mounting bar
-
Wire strippers
-
Wire cutters
-
Small screwdrivers (regular and Phillips) for screw terminals, encoder knob, etc.
A volt-ohm multimeter is recommended, though not strictly required.
Available options
-
Power supply: 120 VAC (domestic) — 12 VDC 0.5A linear regulated external "wall-wart," 2.1mm positive pin. 240 VAC (international) — 12 VDC 1.0A switching "brick" with detachable IEC cord and US AC plug, 2.1mm positive pin
-
Hookup wire: Neotech 26AWG UP-OCC solid copper