Soft Start & Speaker Turn-On Delay / DC Protector Combo

This pack includes one Soft Start Board and one Speaker Turn-On Delay and DC protector board.  They are not available for purchase separately. Soft Start Board Every time you switch on your monster (or not so monster) power amplifier, the initial current drawn from the mains can be many times that of full power. This is more commonly known as inrush current, caused primarily by huge power transformer switch on currents and empty capacitor banks. At power on, the filter capacitors in your power supply are completely discharged, and acts as a short circuit for a brief period of time until a certain amount of voltage has been reached. This brief period of time can be very harmful to your Power Switch, Fuse, Power Transformer, Rectifiers and Filter Capacitors. This Softstart project is employed to limit these destructive inrush currents by momentarily introducing a resistance between the power transformer’s primary winding and the mains supply, which, after a brief moment, is completely connected to the mains. This momentary delay is already enough to charge the filter caps and limit the inrush current draw. If you have any questions please visit the Power Supply Soft Start V3 thread in the store support forum. Bill of Materials  Schematic Assembly photos Dimensions 110mm x 55mm Mounting holes Holes are on a 10mm x 10mm grid Number of boards included 1 Layers 2 Board Revision 3.0   Speaker Turn-On Delay and DC Protector Board Protect your precious speakers from power amplifier turn-on and turn-off transients and amplifier faults such as DC voltage presence at the output. The Speaker Protector connects your speaker after a few seconds from powering on your amplifier, long enough for the power amp to settle down thus eliminating any nasty thumps that you hear on your speakers. It also provides speaker cut-off in the event there’s DC voltage present in your amp’s output protecting your speaker’s voice coil from burning out. If you have any questions please visit the Speaker Turn-On Delay and DC Protector V3 thread in the store support forum. Bill of Materials (3.0.2b) -- Note: 3-paged BOM Schematic Assembly photos Dimensions 100mm x 50mm Mounting holes Holes are on a 10mm x 10mm grid Number of boards included 1 Layers 2 Board Revision 3.0