Archive – Page 2 – LHZ Preamps

Short Battery Life Fix: GREEN Rev 1.6 LHZ Preamps

We have received a small number of reports from users indicating that their battery life is extremely short. In normal use, with the bass unplugged when not playing, a 9-volt battery will typically last a year or longer. In these cases, batteries would be depleted within days or weeks. CAUSE OF BATTERY DRAIN: Certain installations can bypass the ground switch in the barrel jack by shunting the negative battery power via a the control cavity walls lined with foil or…

HazLabs vs LHZ

This month I’ve received an authentic HazLabs preamp and a KHaz preamp to used for circuit tracing to compare to the currently-shipping LHZ-01 and LHZ-02 bass preamps. I’m happy to report that the LHZ is a component-level match to the original Hazlabs preamp, with the only exception being that we use 100uF for the main power capacitor whereas the Haz uses a 33uF cap. (The power capacitor does not impact the audio circuitry: it is strictly to ensure steady 9-volt…