Bose FreeSpace IZA 2120-HZ Service Manual

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TEST PROCEDURES
2.2 Change the input frequency to 40Hz. Verify that the output level is -1dBr +/- 1.
2.3 Change the input frequency to 18kHz. Verify that the output level is -1dBr +/- 1.
2.4 Turn off the signal generator output. Measure the noise level with a 20kHZ filter and
A-weighting. Verify that it is < 65dBV.
2.5 Repeat steps 2.1 to 2.4 for Input B.
2.6 Set the front panel Input A / Input B switch to Input A. Apply a -30dBV, 1kHZ sine wave to the
input A Euro block jacks. Adjust the Input A gain rear panel control to allow a 1W output level.
Reference the dB meter to this output level.
2.7 Change the input frequency to 40Hz. Verify that the output level is -1dBr +/- 1.
2.8 Change the input frequency to 18kHz. Verify that the output level is -1dBr +/- 1.
2.9 Turn off the signal generator output. Measure the noise level with a 20kHZ filter and
A-weighting. Verify that it is < 65dBV.
2.10 Repeat steps 2.6 to 2.9 for Input B.
2.11 Apply a -30dBV, 1kHZ sine wave to the Page Input jack. Adjust the Page Input gain rear
panel control to allow a 1W output level. Reference the dB meter to this output level.
2.12 Change the input frequency to 40Hz. Verify that the output level is -3dBr +/- 1.
2.13 Change the input frequency to 18kHz. Verify that the output level is -3dBr +/- 1.
2.14 Turn off the signal generator output. Measure the noise level with a 20kHZ filter and
A-weighting. Verify that it is < 60dBV.
2.15 Apply a -30dBV, 1kHZ sine wave to the Aux Input jack located on the front panel.
Reference the dB meter to this output level.
2.16 Change the input frequency to 40Hz. Verify that the output level is -1dBr +/- 1.
2.17 Change the input frequency to 18kHz. Verify that the output level is -1dBr +/- 1.
2.18 Turn off the signal generator output. Measure the noise level with a 20kHZ filter and
A-weighting. Verify that it is < 65dBV.
3. Tone Control Frequency Response Tests
3.1 Set the front panel Treble and Bass controls to the 12 o’clock position. Set the front panel
Input A / Input B switch to Input A.
3.2 Apply a -30dBV, 7kHz sine wave to the input A RCA jacks. Adjust the Input A gain rear panel
control to allow a 1W output level. Reference the dB meter to this output level.

Bose FreeSpace IZA 2120-HZ Specifications

General

Maximum current	5 A
AC input voltage	230 V
AC input frequency	50 Hz
Amplifier class	D
Frequency range	55 - 20000 Hz
Audio output channels	2.0 channels
Peak power per channel	- W
Total Harmonic Distortion (THD)	0.3 %
Purpose	Performance/stage
Equalizer	Yes
Product color	Silver
Volume control	Rotary
Connectivity technology	Wired
Line inputs (RCA)	2
Speakers connectivity type	RCA
Package weight	5400 g

Weight and Dimensions

Depth	324 mm
Width	483 mm
Height	44 mm
Weight	4100 g