In This Section
Reflecting on Reflections - June 2014
Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
Quiet Thoughts on a Deafening Problem - May 2014
AES Convention Papers Forum
Why Do Tube Amplifiers Have Fat Sound while Solid State Amplifiers Don't
I propose an explanation to why tube amplifiers have ``fat sound" that solid state amplifiers lacks. The explanation is, the interaction of (1) the nonlinearity of the output tube, (2) output impedance of the amplifier, and (3) the nonlinearity of the output transformer inductance caused by core material B-H curve, results in a frequency selective nonlinear feedback system that softly limits the speaker cone excursion for low frequency music signal with excessive amplitude, while has little effect on high frequency music signal or low frequency music signal with low to moderate amplitude. Better yet, when low frequency music signal with excessive amplitude is superposed with high frequency music signal, this system selectively limit low frequency music signal and has little effect on the superposed high frequency music signal . Comparing to that of a typical solid state amplifier, this mechanism trades some amplifier nonlinearity for less speaker nonlinearity, resulting in less overall nonlinearity of the music sound waves people's ears perceive.
No AES members have commented on this paper yet.
Subscribe to this discussion
Start a discussion!
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.