Bose 301 II Series Manual - Halaman 3

Jelajahi secara online atau unduh pdf Manual untuk Pembicara Bose 301 II Series. Bose 301 II Series 7 halaman.

Halaman Cetak

1. Phase Test

1.1 Momentarily apply 8

speaker input terminals. Observe polarity

when connecting the dc power supply. The

woofer should move outward.

1.2 Momentarily apply the positive side of

an 8

1Vdc power supply to the red wire

that is attached to the tweeter. Connect the

negative side of the power supply to the

speaker's negative input terminal. The

tweeters should move outward.

2. Air Leak Test

2.1 Apply an 8Vrms, 45Hz signal to the

speaker input terminal.

2.2 Listen for air leaks around the woofer,

tweeter mounting brackets and the terminal

cup.

3. Rub and Tick Test

3.1 Apply an 8Vrms, 10Hz signal to the

speaker input terminals.

3.2 No extraneous noise such as rubbing,

scraping or ticking should be heard.

Note: To distinguish between normal

suspension noise and rubs or ticks, dis-

place the cone of the woofer slightly with

your fingers. If the noise can be made to go

away or get worse, it's a rub or tick and the

woofer should be replaced. If the noise

stays the same, it's normal suspension

noise and it will not be heard with program

material.

TEST PROCEDURES

1Vdc to the

4. Power Sweep Test

4.1 Apply an 8Vrms, 10Hz signal to the

speaker input terminals.

4.2 Sweep the speaker from 10Hz to

3kHz.

4.3 Lower the applied voltage to 4Vrms

and continue to sweep the speaker to

5kHz.

4.4 Listen for any buzzes, rattles or other

extraneous noises from the speaker.

Replace any woofer or tweeter that fails

this test. Tighten any screws or redress any

wires that buzz.