Testing the speakers and equalizer

Setting Up

Choose the test method appropriate to your system:

To test the TAPE MONITOR connection

1.Turn off or disconnect any non-901 speakers or headphones that may be connected.

2.On the 901® active equalizer, press the MONITOR button IN to TAPE, and the BASS button OUT to position 1.

3.Set the MID-BASS and MID-TREBLE sliders to center positions.

4.Press your receiver or amplifier TAPE or TAPE MONITOR button to the OUT or NORMAL position so it is not selected.

5.Play music through your system. You should hear both speakers. Do not worry about the sound quality at this point. The equalizer is not yet engaged. If there is no sound from one or both speakers, check the receiver and speaker connections.

6.Move the receiver BALANCE control to the extreme left and then to the extreme right. This tests the left and right channel orientation. If the channels are reversed, check the connections.

To test the equalizer

You have now tested your speakers and their wiring. The following steps test the equalizer and its wiring:

1.With the speakers playing, press the receiver TAPE or TAPE MONITOR button IN, selecting the PLAY or MONITOR position. All sound should stop. If it does not, check your equalizer wiring. Be sure the 901 active equalizer MONITOR button is set to position 2 (TAPE).

2.Press the 901 active equalizer MONITOR button to SOURCE, position 1. The sound should return with full, natural sound characteristics. The system is now ready for use. If the sound does not return, and the equalizer power indicator is lit, the equalizer is probably connected incorrectly. Review equalizer connections.

To test the PRE AMP OUT/MAIN AMP IN connection

If you have connected the 901 active equalizer to the PRE AMP OUT/MAIN AMP IN con- nection, follow these instructions to test the speakers, equalizer, and wiring before connect- ing any other equipment to your system.

1.Turn off or disconnect any non-901 speakers or headphones that may be connected. If your system has a speaker selector switch, set it so that only the 901 speakers are connected to your power amplifier.

2.On the 901 active equalizer, press the MONITOR button OUT to SOURCE, and the BASS button OUT to position 1.

3.Set the MID-BASS and MID-TREBLE sliders to center positions.

4.Play music through your system. You should hear both speakers. If there is no sound from one or both speakers, check to see that the power indicator on the equalizer is lit, then check the receiver and speaker connections.

November 21, 2001

AM195438_03_V.pdf

901 specifications

The Bose 901 speaker system, first introduced in 1968, has become an iconic piece of audio equipment renowned for its unique design and innovative sound technology. Renowned for its ability to deliver an immersive listening experience, the Bose 901 stands out in the world of high-fidelity audio.

One of the most notable features of the Bose 901 is its Direct/Reflecting speaker technology. This system utilizes nine drivers per speaker, of which eight are angled to reflect sound off walls and other surfaces in the listening environment. This design allows the speakers to create a more natural and spacious soundstage, replicating the listening experience found in live performances. The additional driver faces forward to provide direct sound, ensuring that both reflected and direct sound are delivered in harmony.

The Bose 901 is also equipped with an equalization system that enhances its performance. Each speaker comes with an equalizer specifically designed to tailor the sound output to achieve the best possible audio quality. This equalizer compensates for the natural deficiencies in speaker performance at various frequencies, resulting in a well-balanced sound profile. The equalizer can be adjusted to accommodate different listening environments, allowing users to optimize sound output based on room size and shape.

Another defining characteristic of the Bose 901 is its sleek design. The speakers feature a low-profile cabinet that fits seamlessly into various home decors. The compact yet robust construction allows for various placement options, whether mounted on stands or against a wall. This versatility ensures that users can easily incorporate the speakers into their living spaces without compromising on aesthetic or audio performance.

Durability and build quality are also significant aspects of the Bose 901 design. Historically, the materials used in construction have ensured longevity, contributing to the speaker's reputation for reliability. The fabric grille protects the drivers from damage while contributing to the clean, unobtrusive appearance.

In summary, the Bose 901 is a speaker system that marries innovative technology with thoughtful design. With its Direct/Reflecting speaker technology, unique equalization system, and elegant aesthetics, the Bose 901 has cemented its status as a revered choice for audiophiles seeking an exceptional listening experience. Whether enjoyed in a dedicated home theater or as part of an everyday audio setup, the Bose 901 continues to deliver sound that resonates with music lovers around the world.