2015.02.01

Features:

  • 12 ~ 24V Single DC supply
  • Fully configurable 2 way 24dB/Oct Sallen-Key crossover using NE5532 opamps
  • Adaptive Subsonic Filter using THAT4315 Blackmer (DBX) Gain Cell
  • 2x50Watt RMS @ 4ohms & 24V using TPA3116 Class D Amplifier
  • 12dB Correction Logic for Piratelogic MFB sensor
  • DC Protection & Antiplop Relay Logic
  • Small Footprint : 10x5x3 cm

The ABC (Auto, Boat, Campervan) MFB module measuring only 10 by 5 cm was designed with mobility in mind. The ideal candidate to power small 2 way systems for domestic, mobile and professional use. Analog signal processing combined with state of the art class D amplification in a high density package. High quality double sided printed circuit board, equipped with quality components and handcrafted in Amsterdam.

Please note the BH2D is not available as bare PCB or kit. The board design files have been made open source to allow 3rd parties to order copies directly through a PCB shop of your own choice.

EAGLE 6 schematic & board layout

2013.01.01

Features:

  • 22AH587 open source copy.
  • Fully discrete design with standard TO92 transistors
  • 3way design
  • Onboard eko automatic power on and DC protection.
  • LM3886 power amplifiers
  • Open Source Eagle 6.0 project included
  • Small footprint: 10 x 8 x 5 cm.

The 2013.01.01 pcb contains an SMD based copy of the Philips 22AH587 motional feedback loudspeaker. The original discrete power amplifiers have been replaced with LM3886 chip amps including a provision for an additional low note amplifier to allow the use of 8 ohm drivers in bridge mode.

Please note the 2013.01 is not available as bare PCB or kit. The board design files have been made open source to allow 3rd parties to order copies directly through a PCB shop of your own choice.

EAGLE 6 schematic & board layout USer Manual (EN) assembly wizard