Bose ACOUSTIMASS PRO Manuel - Page 7

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General Test Setup

Caution!

There is no mains isolation

transformer in this amplifier! This amplifier

must be isolated from the AC line by a 1.0

kVa or larger isolation transformer during all

testing!

A stancore GIS-1000 or equivalent isolation

transformer should be used for 100VAC and

120VAC units.

A Siemens 4AX24-16-2BK or equivalent

isolation transformer should be used for

230VAC units.

A variac rated 1.0kVA or larger should be

used to vary the line voltage.

Output Loading: Unless otherwise speci-

fied, perform all tests with a series con-

nected 16Ω, 1%, 500 watt resistor and a

1.0mH, 10%, 5 amp rated inductor as the

load.

Input: Unless otherwise specified, apply a

1kHz, 1.0Vrms signal to the amplifiers

unbalanced input.

All output measurements should be made

with a 30kHz, 4 pole low pass filter in series

with the input of the measurement equip-

ment to reject the switching ripple.

1. Switching Frequency

1.1 With out an applied signal, measure the

switching frequency at the amplifier's out-

put. It should be 110kHz to 130kHz. Do not

use the 30kHz low pass filter when perform-

ing this test.

2. Output Ripple

2.1 The level of the switching frequency

should be less than 20Vpp. Do not use the

30kHz low pass filter when performing this

test.

TEST PROCEDURES

3. Voltage Limiting

3.1 Apply a 1.0Vrms, 100Hz signal to the

amplifier's input. Measure the output

according to the following table.

Variation

100V

120V

240V

4. Current Limiting

4.1 Apply a 1.0Vrms, 100Hz signal to the

amplifier's input and connect an 8Ω resis-

tive load to the output.

4.2 The output voltage should be 80.0Vp

± 8.0Vp (corresponding to 10A ± 1A).

5. Reference Gain

5.1 Apply a 50mV, 1kHz signal to the

amplifier's input. Reference a dB meter to

the applied signal.

5.2 Measure the output of the amplifier. It

should be 32.0dB ±1.5dB.

6. Frequency Response

6.1 Apply a 50mV, 1kHz signal to the

amplifier's input. Reference a dB meter to

the amplifiers output. Measure the output

according to the following table.

Note: Use the last six digits of the serial

number to determine which table to use.

The serial number is located on the side of

the amplifier as MK01xxx______ or

MZ01xxx______.

Output Voltage

Limit

104.5Vp to 115.5Vp

125.4Vp to 138.6Vp