I found a vintage preamplifier. It equipped with parametric equalizers. The controls provided 3 adjustable parameters: level, frequency and bandwidth. I thought this eq may equal to tone controls on the other amps. So, I’d like to know that, when designing the tone controls, no matter it’s an integrated amplifier or a preamplifier, how much bandwidth we usually assign? And, AFAIK, the tone control or loudness circuit were achieved by a simple RC circuit, does this take bandwidth into account? Could we adjust bandwidth by this circuit?
Tone controls are passive (in the signal chain) and active in the NFB. Used to change the timbre of the sound.
Individual preferences and hearing characteristics.
HI-FI uses low, high and sometimes mid-range control. The rise compensates for the disadvantages of the speaker system. Reduction is used to reduce noise and improve speech intelligibility.
They are described by the curves of the dependence of the DB level on the frequency of the F at different positions of the regulator.
Different characteristics can be designed in terms of frequency and amount of adjustment.
Individual preferences and hearing characteristics.
HI-FI uses low, high and sometimes mid-range control. The rise compensates for the disadvantages of the speaker system. Reduction is used to reduce noise and improve speech intelligibility.
They are described by the curves of the dependence of the DB level on the frequency of the F at different positions of the regulator.
Different characteristics can be designed in terms of frequency and amount of adjustment.
The program "Timbreblock 4.0.0.0" (750kb) allows you to calculate passive tone controls intended for use in audio amplifiers.
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The unit of bandwidth for those equalizers is Octave. This is interesting and new to me. Could anyone explain how to select or calculate the bandwidth for the equalizer please?