Hifisonix Improved Soft Start + DC Blocker PCB aka iSSDCB

The Improved SS + DCB aka iSSDCB provides mains in-rush current limiting to 10A and blocks any DC on the mains making this a welcome upgrade for any power amplifier. The maximum continuous AC mains load current that the board supports is 4.6A  RMS. On 240VAC mains supply this translates to a continuous load of […]

X-Altra Mini II ‘Classic’ PCB Set ‘A’

This PCB set is to build a full X-Altra Mini II ‘Classic’ which is the manual control version of the preamp – JFET discrete line amp unbalanced output,  aux unbalanced output, 2 left and right balanced outputs  plus a buffered record output; inputs are  phono (MC and MM), CD, Tuner, Aux, DAC and Rec; Very […]

X-Altra Mini II ‘Classic’ PCB Set ‘B’

This PCB set allows you to build a  X-Altra Mini ‘Classic’ without the Balanced Line Stage and without the MC/MM Input. It features a discrete unbalanced output,  a buffered record output; inputs are  CD, Tuner, Aux, DAC and Recorder, class A headphone amp.  If you are using an external phono preamp, you can bridge 2 […]

This PCB set is to build a X-Altra Mini II class A Headphone amplifier with input select for 6 sources; It does not provide any line outputs, no line amplifier inputs or MC/MM phono inputs Buffered Record output; inputs are  CD, Tuner, Aux, DAC and Rec;  you can wire the phono input through to the […]

X-Altra Mini II ‘Classic’ Board Set ‘D’

This PCB set allows you to build a complete X-Altra Mini II ‘Classic’  without the MC/MM phono EQ amp or the discrete line stage. PCB Set consists of Balanced line amp PCB Input select control PCB Low noise Standard PSU Input relay select PCB  Rear panel PCB set (2 boards) 2 off volume and input […]

X-Altra Mini II ‘Classic’ PCB Set ‘E’

This PCB set is to build a ‘Classic’ X-Altra Mini II but without the discrete line amp stage –  aux unbalanced output, 2 left and right balanced output plus a buffered record output; inputs are  phono (MC and MM), CD, Tuner, Aux, DAC and Rec, class A headphone amp PCB Set consists of MC/MM Phono […]