Build a 2-channel balanced preamplifier, Using Danish Audio ConnecT’s (DACT) high quality line stage / preamplifier module CT101 to build a 2-channel balanced preamplifier. DIY audio friendly. CT101 is ideal as the active line stage in a preamplifier. It is designed to match the DACT stepped attenuators CT1 or CT2, which mounts directly into the CT101 PCB. Combining it with DACT's CT3 input selector switch and CT4 balance control, will make a complete high-end preamplifier at the fraction of the cost of ready-made equivalents.