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RE: Poll question: Please tell me what you think are causes for system "warmth".

In my builds this is always the last thing that gets improved after hair pulling...and it is elusive because of the variation of driver behavior.

Amplifier Damping

Wikipedia definition:

In loudspeaker systems, the value of the damping factor between a particular loudspeaker and a particular amplifier describes the ability of the amplifier to control undesirable movement of the speaker cone near the resonant frequency of the speaker system. It is usually used in the context of low-frequency driver behavior, and especially so in the case of electrodynamic drivers, which use a magnetic motor to generate the forces which move the diaphragm.

In my experience, big plate triode amps seem to have a better inherent damping factor. I have had to use local feedback in the output of Tetrodes or strapped Pentodes to drive down the output impedance to get similar results.

That's my take on a crazy subject

Stuben

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