– 25 –
Level Setting the BLT
•
Disconnect Speaker(s)
from the 250.
2
•
CD Software
used to set levels is a test tone of 1kHz at “0dB” or “All Bits High”
•
Source Unit
set to 3/4 volume (or maximum unclipped output)
•
Remove BLT Cover
to access
test pads and gain pots
•
AC Voltmeter
set to
AC Volts
•
AC Voltmeter
“–” connected to
RCA shield of BLT
•
AC Voltmeter
“+” connected to
test pad inside the BLT
•
Adjust BLT Gain
from
2.5 VRMS min. to 8.0 VRMS max per test pad (see chart below)
Be sure the time index reads greater than 30 seconds on source unit.
*Absence of gain overlap will reduce SPL and may not permit amplifier to reach full output power due to various CD
software.
Gain Overlap
BLT Output (AC Volts)
Performance Characteristics
+0dB*
2.5 VRMS
Best S/N Ratio, Reduced SPL
(Used for Optimum Sound Quality)
+5dB
4.5 VRMS
Good S/N Ratio & SPL
(Use for Audiophile Listener)
+10dB
8.0 VRMS
Best Compromise between S/N Ratio & SPL
(Used for Average Listener)
a
d
v
a
n
c
e
d
O
p
e
r
a
t
i
o
n
+
–
VAC
BALANCED LINE TRANSMITTER
®
®
1kHz Test Tone @ “0dB”
L
R
L
R
AUD
SEL
1
2
3
4
5
6
RDM
RPT
SCAN
PAUSE
D.SCN
DIM
AMFM
Ch
RPT
LD RDM
DISC
ST
P.SCN
LOUD
DSPL
R
CLOCK
ILLUM
PWR
AUTO
®
®
VOL
TUNE
8.0