I finally got around to installing these 4 resistors and it made an enormous difference. I don’t have sensitive speakers (87db) but it is an obvious improvement in lowering the noise floor. In between tracks or in quiet passages one could easily detect a buzzing noise from the listening chair. Now, at loud listening volumes (without music playing) I can barely detect noise with my ear an inch away from the drivers. My only regret is waiting so long to do this mod. Great work, PB!
BeePre 2 Modification for Highly Sensitive Systems
- Thread starter Paul Birkeland
- Start date
ConradEdgewood
New member
I did the Modification for Highly Sensitive Systems, and it works great! My question is, with each upgrade, does it ever get removed? I did the stepped attenuator/Constant Current Source upgrade, and now will do the Output Hybrid Shunt Regulator and low impedance balanced output upgrade. Do I just keep the resistors from the Highly Sensitive Systems in place? Or should they be removed with one of these upgrades? Thanks in advance. Eric
You can leave the resistors there. When the second upgrade is added, they are not explicitly necessary anymore, but they also don't hurt anything.
