An Unconventional Loudspeaker system Latest change 2019-01-16
Electronics in the box
The electronics in the box consist of the following parts:
- Filter board FLT
- Two Power Amplifier boards TPA
- Power board PWR
- Power supply
- Connector to the Mid-range speaker and the Tweeter.
We see the Mains Power input and the Neon indicator, the RJ45
connector to the Control Amplifier, 3 indicator Leds, and a 8-pole
Speakon connector for the cable to the Midrange compartment. There
is a relatively small heatsink, because there is only little heat
The amplifier panel can easily be detached from the cabinet.
Inside View. Panel size is 240 x 260 mm.
On top the FLT board, top right the Speakon connector to the
Midrange and Tweeter speakers. The cable to the bass speaker goes
directly into the cabinet with a very airthight feedtrough.
Below the FLT board the 2 Ohm resistor for the tweeter is visible.
(see the description of the FLT board for why this resistor)
In the middle the two TPA Power Amplifier boards, left Bass and
right Mid and Tweeter. On the bottom we see the Power Supply and
the Power switching board. The powersupply is a brandless unit
giving +48 Volt at 7.8 A and +12V at 2 A. As it is an open-frame
type I made a safety cover over it.
On several places ferrite beads are inserted to reduce High