Bose 301 Series, 301V Manual

PRODUCT DESCRIPTION

The Bose^® 301^® Series V is a replacement for the 301 Series IV speaker, and is a passive, two-piece (mirror imaged stereo pair) home loudspeaker in a bookshelf configuration. The 301 Series V is designed for use with standard amplifiers, receivers, and other related home audio components.
The 301 Series V utilizes separate inward and outward firing tweeters to achieve consistent stereo imaging over a broad listening area (Stereo Everywhere^® performance) while maintaining a spacious sound stage.
Aesthetically, the 301 Series V echoes styling cues successfully used in the 601^® Series IV and the 701^® Series II, and has a family resemblance to the 201^® Series V. The 301 Series V features a molded plastic front panel, integrated with a vinyl-covered particle board enclosure.
Additionally, the system incorporates slot-port technology which reduces port noise and produces cleaner, more natural bass. The sum of all these unique features makes the 301 Series V speaker capable of reproducing the wide dynamic range demanded by today's advanced recordings without strain or loss of clarity.

DISASSEMBLY/ASSEMBLY PROCEDURES

Note: Refer to figure 3 for the following procedures.

1. Grille Removal
   Grasp the top and bottom edges of the grille (12) and pull off the grille.
2. Grille Replacement
   Align the grille (12) so that the Bose logo (11) is right side up on the tweeter side of the cabinet and push it into place.
3. Woofer Removal
   1. Perform procedure
   2. Remove the four screws (13) that secure the woofer (14) to the cabinet.
   3. Lift the woofer out and cut the wires as close to the terminals as possible.
4. Woofer Replacement
   1. Strip the wires and connect the wires as shown in figure 1. The red wire to the single center terminal. The black wire to the right side double terminal (looking at the woofer magnet side down). The orange and green wires to the left double terminal. The capacitor is connected to the far left and right terminals.
      
   2. Secure the woofer (14) to the cabinet using four screws (13).
   3. Perform procedure 2.
5. Front Tweeter Removal
   1. Perform procedures 1, 3.2 and lift the wooter out of the cabinet, but do not cut the wires.
   2. Using a 1/4 inch socket, remove the screw (6) and bracket (7) that secures the tweeter (8) to the cabinet.
   3. Lift the tweeter out of the cabinet and cut the wires as close to the terminals as possible.

6. Front Tweeter Replacement
   1. Strip the wires and connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal. Dress or twist the wires to prevent buzzes.
   2. Place the tweeter (8) into the cabinet and secure it using the tweeter bracket (7) and screw (6).
   3. Perform procedures 4.2 and 2.
7. Rear Tweeter Removal
   1. Perform procedures 1, 3.2 and lift the woofer out of the cabinet, but do not cut the wires.
   2. Using a 1/4 inch wrench, remove the screw (1) and bracket (2) that secures the tweeter (3) to the cabinet.
   3. Lift the tweeter out of the cabinet and cut the wires as close to the terminals as possible.

8. Rear Tweeter Replacement
   1. Strip the wires and connect the red wireto the positive (+) terminal and the black wire to the negative (-) terminal. Dress or twist the wires to prevent buzzes.
   2. Place the tweeter (3) into the cabinetand secure it using the tweeter bracket (2) and screw (1).
   3. Perform procedures 4.2 and 2.
9. Terminal Block Connector Removal
   1. Perform procedures 1, 3.2 and lift thewoofer out of the cabinet, but do not cut the wires.
   2. Unclip the terminal block connector (4) from the inside of the cabinet and push it out through the rear panel. Cut the wires as close to the terminals as possible.
10. Terminal Block Connector Replacement
    1. Strip the wires and connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal. Dress or twist the wires to prevent buzzes.
    2. Secure the terminal block connector (4) to the cabinet.
    3. Perform procedure 4.2 and 2.

TEST PROCEDURES

Note: Remove the grille for the following tests.

General Test Set Up
Connect the output of a signal generator to the input of a power amplifier. Connect the output of the power amplifier to the input terminals of the speaker under test. Refer to figure 2, test equipment set up.

1. Woofer Rub and Tick Test
   1. Apply a 7 Vrms, 10 Hz signal to the input terminals of the speaker under test. No extraneous noises such as rubbing, scraping or ticking should be heard.
      Note: To distinguish between normal suspension noise and rubs or ticks, displace the cone on the woofer slightly with your fingers. If the noise can be made to go away or get worse, it is a rub or a tick and the woofer should be replaced. If the noise stays the same, it is a normal suspension noise and the woofer is fine. Suspension noises will not be heard with program material.
2. Air Leak Test
   1. Apply a 7 Vrms, 35 Hz signal to the input terminals of the speaker under test.
   2. Listen for air leaks around the woofer, tweeters and cabinet seams. Any air leaks will be heard as a sputtering or hissing sound.
   3. Replace or reposition any gasket where an air leak can be heard.
3. Sweep Test
   1. Apply a 7 Vrms, 10 Hz signal to the input terminals of the speaker under test.
   2. Sweep the input generator from 10 Hz to 5 kHz. There should be no extraneous sounds.
   3. Reduce the input voltage to 3 Vrms, and continue sweeping from 5 kHz to 15 kHz.
   4. Redress any wires or components that buzz or rattle. Replace any woofer or tweeter that is found to be defective.

4. Phase Test
   Note: The supply voltage should only be momentarily applied to the speaker input terminals to avoid possible damage to the speaker.
   1. Set a DC power supply to 9 volts. Connect the positive wire from the power supply to the positive (+) connector of the input terminal and the negative wire to the negative (-) connector of the input terminal. The woofer should move outward with the application of the supply voltage.

MAIN PART LIST

Note 4: When replacing the tweeters, replace with like tweeter.
If the front tweeter has a silver trim use 290845-01 for the rear and 290847-01 for the front
If the front tweeter has a black trim, use 290836-01 for the rear and 290813-01 for the front

CROSSOVER PART LIST

Figure 4. Crossover Diagram

PACKAGING PART LIST

Figure 5. Packaging Exploded View

SPECIFICATIONS