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

screws and nuts are Harwin R30-3002502

Below the filament there is a fine

Dimensions 100mm x 50mm Mounting holes Holes are on a 10mm x 10mm grid Layers 2 Board Revision 3

This project is an effort to assemble these elements into a discrete gain stage that can be used as the front end for modest power amplifiers or as a general audio gain circuit

but has pins only along one edge

The PCB has provisions for up to 6 relays for input signal switching and an output relay for delayed start-up muting

long enough for the power amp to settle down thus eliminating any nasty thumps that you hear on your speakers

a phono stage

and this Meanwell GST120A24-P1M power supply had the best performance of all the candidates

Single Power Supply

That means a clean supply that doesn't sag with varying load

T-reg is a high voltage regulator aimed at tube-level high voltage amplifiers