Bose FreeSpace E4 Series II, Service Manual, Page: 9 / 109

9
Line Outputs (continued)
Nominal Limits Conditions
CMRR referred
to output:
92 dB >/= 60 dB at 1 kHz, 20 dB gain, 200 Ohm source
impedance
Output noise: -90 dBV </= -85 dBV A-weighted, set for 0 dB gain
THD+N: .001% .01% at +10 dBV output, 1 kHz, 20 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB set for 0 dB gain, no limiting, terminate the
unused input with a 50 Ohm resistor
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 30 Hz to +0/-1.0 dB reference 1 kHz, measured at 20 dB gain and
20 kHz with 0 dBV output
Turn on/off pop: 10 mV peak </= 50 mVpk as monitored by a listener, must be inaudible at
full gain using a Model 32 loudspeaker tapped
at 32W, with the unit set for no EQ and the
loudspeaker 3 feet from listener
Music on Hold (MOH)
Nominal Limits Conditions
Output impedance: 400 Ohms +/-1% impedance at 1 kHz
Maximum output level: +17 dBV >/= +17 dBV 1 kHz, THD less than 0.1%, load 10 kOhm,
differential
Output noise: -90 dBV </= -85 dBV A-weighted, set for 0 dB gain
THD+N: .001% .01% at +17 dBV output, 1 kHz, 0 dB gain
Crosstalk at 1 kHz: -90 dB </= -80 dB set for 0 dB gain, no limiting, terminate the
unused input with a 50 Ohm resistor
Crosstalk at 10 kHz: -70 dB </= -60 dB
Frequency response: 20 Hz to +0/-1.0 dB reference 1 kHz, measured at 0 dB gain and
15 kHz with 0 dB output
Turn on/off pop: 10 mV peak </= 50 mVpk as monitored by a listener, must be inaudible at
full gain using a Model 32 loudspeaker tapped
at 32W, with the unit set for no EQ and the
loudspeaker 3 feet from listener
SPECIFICATIONS