Bose 301 Series IV Manual de servicio - Página 7

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1. Specifications

This ensures that the woofer and speaker input

terminals are wired in phase, (see Schematic

Diagram, Figure 2).

6. Tweeter Phase Test: Remove 4 screws and lift

the woofer carefully away from the speaker

cabinet in order to access the terminal cup.

Check the wiring on the terminal cup and on

both sets of tweeter terminals against the

schematic in Figure 2. This ensures that both

tweeters are wired in phase.

Crossover Measurements

Schematic Diagram

RED

Z ( + )

Y ( - )

BLK

Note: Due to the inaccessibility of the tweeters,

it may be necessary to remove the tweeters

from their respective endcaps. Refer to the

Disassembly Procedures on replacing

tweeters and for separating the tweeters from

the endcaps.

7. Crossover Testing: The crossover is tested by

measuring the voltage across a 10 Ω, 5 watt

resistor in series with the loudspeaker. See

Figure 2 and the following Table. If output

voltage is not within the limits shown, check

connections and component values for C1, C2,

and RT1.

RT1

2" TWEETER

YEL

3" TWEETER

BLK

8" WOOFER

FIGURE 2