MSP 3400C
PRELIMINARY DATA SHEET
7.1.23. Subwoofer on Headphone Output
7.2. Exclusions
The subwoofer channel is created by combining the left
and right loudspeaker channels ( (L+R)/2 ) directly be-
hind the tone control filter block. A third order lowpass fil-
terwithprogrammablecornerfrequencyandvolumead-
justment respectively to the loudspeaker channel output
is performed to the bass-signal. Additionally, at the loud-
speaker channels, a complementary high pass filter can
be switched on. The subwoofer channel output can be
switched to the headphone D/A converter alternatively
with the headphone output.
In general, all functions can be switched independently
of the others. One exception exists:
1. If the adaptive deemphasis is activated (Reg. 000f
hex
L), the FM fixed deemphasis (Reg. 000f
H) must be
hex
set to 75 µs.
Subwoofer Channel
Volume Adjust
002Chex
H
0 dB
0000 0000
RESET
00hex
–1 dB
–29 dB
–30 dB
Mute
1111 1111
1110 0011
1110 0010
1000 0000
FFhex
E3hex
E2hex
80hex
Subwoofer Channel
Corner Frequency
002Dhex
H
50 Hz .... 400 Hz
e.g. 50 Hz
= 5 int
0000 0101
0010 1000
05hex
28hex
400 Hz = 40int
Headphone Output
Headphone
002Dhex
0000
[7:4]
0hex
8hex
[3:0]
Subwoofer
1000
Subwoofer: Comple-
mentary Highpass
002Dhex
HP off
HP on
0000
0001
0hex
1hex
Note: If subwoofer is chosen for headphone output, the
corner frequency must be set to the desired value, be-
fore the loudspeaker volume is set. This is to avoid plop
noise.
40
MICRONAS INTERMETALL
MICRONAS [ MICRONAS ]
