Neil McCauley
16-02-2016, 14:49
Paul McGowan writes: If the high-end designer really wants thunderous bass response in his equipment, a servo is perhaps the very best way to go. You’ve probably heard of servo bass before but servo controlling the low end response of an amplifier is a technique perhaps buried in the details of some designs and rarely implemented in most.
If you’ll remember from a few days ago I suggested that in order to make direct coupling possible – eliminating any of the components in the signal path – we’d have to rolloff the amplifier’s bass response. We usually do this with our old friend the capacitor, but that technique has major limitations – you are rather limited in how low the amplifier can go – and the lower the better if you want stunning bass. Using a DC servo, instead of a capacitor, is the answer.
A DC servo is an electronic circuit that magnifies the effect of a capacitor by several magnitudes, allowing designers to set the low frequency rolloff of their circuits at well below 1Hz. For example, in our circuits we roll off at about 1/10th of a Hertz using a servo.
Why does this matter if .....
Continues @ http://www.hifianswers.com/2016/02/so-the-next-time-youre-looking-for-no-compromise-bass-look-towards-equipment-with-servos-youll-be-well-served/
If you’ll remember from a few days ago I suggested that in order to make direct coupling possible – eliminating any of the components in the signal path – we’d have to rolloff the amplifier’s bass response. We usually do this with our old friend the capacitor, but that technique has major limitations – you are rather limited in how low the amplifier can go – and the lower the better if you want stunning bass. Using a DC servo, instead of a capacitor, is the answer.
A DC servo is an electronic circuit that magnifies the effect of a capacitor by several magnitudes, allowing designers to set the low frequency rolloff of their circuits at well below 1Hz. For example, in our circuits we roll off at about 1/10th of a Hertz using a servo.
Why does this matter if .....
Continues @ http://www.hifianswers.com/2016/02/so-the-next-time-youre-looking-for-no-compromise-bass-look-towards-equipment-with-servos-youll-be-well-served/