Review LCM-A1d   I was watching LEAR for some time, particularly their range of custom headphones. LEAR has a good reputation in the field and turned heads with their innovations like the hybrid LCM-BD4.2. When they recently the LCM-A1d, a single dynamic driver custom IEM, whose sound signature is tunable via a integrated potentiometer and starts selling for 2’000 HKD (260 USD,  233 EUR), I got interested. For some more dollars theres is an option to get a semi-rigid shell which is a bit softer than the usual acrylic polymer, but harder than...