Motorola R-2001D - Audio Frequency Response; Audio Frequency Response; EIA Standard RS-204 C

AUDIO FREQUENCY RESPONSE
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LIMITS FOR
LOUDSPEAKER
USAGE
300 HZ
1 KHZ
3 KHZ
LIMITS FOR
HEADPHONE
OR
LINE USAGE
FIGURE 4-4. AUDIO FREQUENCY RESPONSE; EIA STANDARD RS-204C
4-8