User Manual

17Phonitor mini
Tech Talk
The advantages of the 120-Volt operating voltage
Do bear in mind that dB scales do not represent linear but rather
exponential increases. A 3dB increase corresponds to doubling the
acoustic power, +6dB correspond to twice the sound pressure level,
and +10dB correspond to twice the perceived loudness.
When it comes to volume, the 120-volt technology exhibits a perfor-
mance, in regard to maximum level and dynamic range, that is twice
that of common components and circuits given that its values are
approximately 10dB higher.
THD measurements of the SPL op-amp show a difference of more
than 3dB compared to the OPA134 at 36V — in terms of sound pres-
sure level, that corresponds to an improvement of more than 50%.
The operating level most commonly used for audio equipment is
30 volts.