For sale: Linkwitz lab MT1 active filter boards

[wimdehaan]

For sale: 2 orginal unused Linkwitz lab MT1 active filter boards. These boards are now obsolete, so not available anymore. I'm asking 50 euros for the 2 boards.

MT1 printed circuit board
The MT1 printed circuit board allows the construction of a variety of active line-level filters for loudspeaker equalization. In particular, it provides crossovers, baffle step and delay compensation for a 2-way active speaker. For the design of the filters and to determine component values follow the outline given on the Active Filters page and on the Archive CD.

The MT1 has the following features:

Circuitry for two channels and dc supply filtering
6.25" wide along the connector side by 4.6" deep, 0.062" FR4
Top silk screen with component designations
2 layers, top layer ground plane, 1 oz. Cu, 50 mil traces, plated through holes, solder mask top and bottom
DIN power connector and 6 phono connectors
Connection pads for dc power to other boards
Weight 70 gram (2.5 oz)

Both boards come with the following documentation package:

General schematic with component designations
Printout of silk screen for parts location
Example circuit schematics with component values and designations
Parts list for one example with order numbers for Digi-Key and Mouser
+/-12 V power supply recommendation

[wimdehaan]

boards are still available, so they are not sold yet.

[wimdehaan]

Boards are sold!

[Elbert]

No, they are bought!