Time to get the chisel out...

Annoyingly I didn't check the serial nos closely on my DSP5k2s when I bought them. The pair's serial number is under 100, as is one of my HCs.

Fingers crossed.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.