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PurePath™ Smart Amp User Manual (TAS5766M/68M)
19
4.2.1 Bass Enhancement (Low Volume Tuning)
The main objective is to maximize the bass response as much as
possible and tune the bass as desired. During this phase it is
important to listen at low volume levels only – this is to ensure that
thermal and mechanical protection systems do not kick-in. Ensure
that the
Morphing Control
) is set at max during this
phase.
Table 4.
Bass Enhancement Parameters
Field
Description
Corner Frequency
-3dB point of the target response. Smaller speaker
drivers should use higher corner frequency.
Order (Slope)
Determines the sharpness of the roll-off towards
lower frequencies. For lower corner frequency,
choose higher order.
Type
Selects the alignment type.
Bass EQ
To further enhance bass, as needed, at low volume
settings
Corner Frequency
The
Corner Frequency
indicates the -3dB point of a flat
response target (indicated by the green curve). Selecting a
proper Corner Frequency is important for the overall
performance of the speaker system. If the cutoff is set too
high, the speaker will have limited bass response. If set too
low, energy will be wasted trying to drive frequencies that the
speaker won’t be able to reproduce and the excursion
protection system will be overly active.
A ‘getting started’ setting is described in this section. It is
recommended to do a series of listening tests while adjusting
settings.
•
Adjust
Corner Frequency
while watching the
compensation (red curve) in the response plot window.
•
Targeting between a 10dB to 20dB compensation (red
curve) often provides the best results.
•
Do not exceed the 20dB line (at least initially).
•
In some situations it can be advantageous to leave
some gain headroom in favor of a general Bass EQ
(later step).
Good?
Set CORNER
FREQUENCY
Set alignment ORDER
(slope)
Set alignment TYPE
Tune BASS EQ
LISTENING TEST
at low volume levels
(e.g. -30dB)
yes
no
