Rockford Fosgate 50.1 - Manual (Page 28)

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Level Setting the BLT
+ –
9.3
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
• Disconnect Speaker(s) from the 50. 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 2.9 VRMS min. to 9.3 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* 2.9 VRMS Best S/N Ratio, Reduced SPL
(Used for Optimum Sound Quality)
+5dB 5.2 VRMS Good S/N Ratio & SPL
(Use for Audiophile Listener)
+10dB 9.3 VRMS Best Compromise between S/N Ratio & SPL
(Used for Average Listener)
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