Monthly Archives: March 2014

Stepped Attenuator & legendary G.E.C CV 2523 tube

The stepped Attenuator is an alternative to the usual potentiometer controlling the volume. The difference is that the potentiometer uses a track of a resistive material like carbon or plastic, where a stepped attenuator uses a mechanical switch combined with traditional resistors.  A metal film transistor should be less noisy than the resistive material in a potentiometer and hence the improvement sound quality. The other benefit is that the balance between the channels should be absolutely perfect. That’s the theory at least.   There are different types of stepped attenuators…

Bottlehead Crack and Speedball review

The Bottlehead Crack OTL tube amplifier is widely praised  for it’s smooth, but neutral and detailed sound. If you own a pair of Sennheiser HD600, HD650 or even the HD800 flagship model, this is what many will recommend you to buy. This is especially true if you ask the question on the Head-Fi forums. Coming from the very neutral and lovely Objective2 amplifier, I wished for something more dynamic, more alive, simply with more feelings to the sound. Don’t get me wrong, I love the O2 and ODAC combo more than…