UNiKA UD-064 & UD-064D Switching Power Amplifier
eXtraTone™ to Boost the Bass Performance of Speakers
eXtraTone™ is an unprecedented digital algorithm to boost and compensate speaker for loss below its bass
cutoff.
Most speakers have their -6dB or -10dB bass cutoff frequency around 70Hz or so. Audio technicians may try
to extend acoustic response below the cutoff frequency by sending more power below the cutoff frequency
to speakers. However, sending more power below the cutoff frequency to speakers actually just wastes
energy over the speakers but does no benefit on audible bass perception to the audience.
eXtraTone™, on the contrary, cuts down the power of audio below the cutoff frequency to the speakers.
Besides boosting the audio on the cutoff frequency of the speakers, the eXtraTone™ mirrors the audio below
the cutoff frequency up to the range of frequency above the cutoff frequency in a way of harmony. Though
the audio below the cutoff frequency is cutting down, the audience can actually perceive the presence of bass
through the harmonic audio over a range of frequency above the cutoff frequency.
When eXtraTone™ is enabled, an indicator is shown up on
the bottom left of the display to remind users of its
engagement. Users browse to eXtraTone™ setting items by
rotating the ENCODER over the last item of channels in the
VOLUME menu. The setting items include,
Base Frequency: We recommend you to set this to the
-6dB or -10dB cutoff frequency of your speakers. The
eXtraTone™ provides a significant bass boost over the audio on the base frequency. Default is 63Hz.
Base Boost: Here you can set the intensity of bass boost on the base frequency set above. The
eXtraTone™ can boost a great amount of bass over the base frequency. Default is +2dB.
Harmony Boost: Here you can set the intensity of the harmonic mirror of audio below the base
frequency to pile up over the range of frequency above the base frequency. Default is +2dB.
eXtraTone™ On/Off: You have the option to turn off the eXtraTone™ feature. When it is turned off, all
the above three items are hidden in item browsing in VOLUME menu.
NOTE:
The strength of Base Boost and Harmony Boost is actually dynamically controlled by the
processor in the amplifier. For example, a setting of +2dB Base Boost may actually boost audio in
base frequency up to 6dB if the input level is -30dB from its 0dBFS; while hardly more than 1dB if
the input level is almost reach its 0dBFS. The mechanism prevent the amplifier from overdrive,
while it also meke sesnse that the weak audio always requires more bass boost in the real world.
Overview Description Getting Started Configurations
eXtraTone & LPF
In & Out Dante Applications Specifications Warranty
