Can a Bose 901 be repaired without an equalizer?

In this project, a non-functional Bose 901 Equalizer is repaired by replacing the old resistors and capacitors with modern parts. A friend got sort of a two-for-one deal on some vintage Bose 901 speakers. These speakers were designed to be used with an active equalizer; without it, the sound quality is quite poor.

What are the components of a Bose 901 speaker system?

Unpacking the cartons A complete Bose 901 Series VI speaker system consists of three matched components: two 901 Direct/Reflecting®speakers and a separate 901 Series VI active equalizer. Two cables are included to connect the active equalizer to your receiver or amplifier. The 901 speakers and equalizer are packed in three separate cartons.

What’s the range of the 901 active equalizer?

You’d have a range of +/- 24 dB in each band which would cover the full range of the 901 Active Equalizer. On the extremes, you’d have both equalizers gained up; in the middle, you’d only have the first gained up slightly and the second left flat.

How does Bose Series VI active equalizer work?

Bose®901®Series VI speakers and Series VI active equalizer work with your stereo components to produce a superb music system. The active equalizer is an integral part of the system and may be connected in a variety of ways, depending on the components you have. The two most common methods are described in this guide.

How to connect the Bose 901 active equalizer?

PAR- TICULA_R ATTENTION SHOULD BE PAID TO SECTION V: CONNECTING THE 901 ACTIVE EQUALIZER. U acking The 901 system is c arefu.lly packed for s hipment in sturdy cartons. Remove the two speaker units, the Active Equalizer and the bundle of four audio cables.

What’s the difference between Bose 901 and 901?

Because the BOSE 901 system differs fundamentally from other speaker systems, IT IS IMPORTANT THAT THESE INSTRUCTIONS BE CAREFULLY FOLLOWED. EACH STEP IS ESSENTIAL FOR PROPER OPERATION AND FULL PERFORMANCE OF THE BOSE 901 . PAR- TICULA_R ATTENTION SHOULD BE PAID TO SECTION V: CONNECTING THE 901 ACTIVE EQUALIZER.

Which is better Bose 901 or Linkwitz dipole?

There is no denying the 901’s ability to make you hear all of the music, but because the image is such a blur I don’t seem to notice it as much as directional speakers, it instead you get the feeling of it. In contrast, Linkwitz dipole speakers create a soup of sound spread around the room, where the 901’s transform the walls into massive speakers.

Where does the Bose eq901b-i / II install?

The EQ901B-I/II features dual equalization curves, normal and enhanced, which will accommodate your Series I/II depending on personal preference. The EQ901B-I/II installs in your tape monitor loop, pre-out/pre-in loop, or between your preamp and power amp.

Where does the sound come from on a Bose 901?

There’s no crossovers or other passive components inside – just a bunch of individual speakers wired together to give the right impedance. About 11% of the sound is radiated from the single front-mounted speaker, and the remaining 89% of the sound is radiated from the back.

Can a Bose 901 be used as an AVR?

The Bose 901 is a nifty speaker but their mandatory use of an equalizer makes them a bad choice for AVRs. Here’s a copy of your owners manual.

Is there an equalizer for the Bose 901?

Bose also made an equalizer with a similar visual aesthetic to accompany the 901 speaker series. There are two versions of the EQ, the 901 series I and the 901 series II. It is important to note that each EQ is only compatible with certain speakers in the series.

The Bose 901 is a nifty speaker but their mandatory use of an equalizer makes them a bad choice for AVRs. Here’s a copy of your owners manual.

Why does my Bose 901 have a jagged response?

The jagged response is probably due to baffle reflections, and comb filtering from the 9 drivers all doing the same thing. This took a good bit of work, here is a full 180 degree measurement done in 15 degree increments.

When did Bose 901 Series VI speakers come out?

This pair was made back in 1987 when Bose speakers were still made in America. The design has not changed since then, and honestly it’s almost longer in the tooth than Klipsch Heritage speakers. Blue cones with that famous for failing foam surround.

In this project, a non-functional Bose 901 Equalizer is repaired by replacing the old resistors and capacitors with modern parts. A friend got sort of a two-for-one deal on some vintage Bose 901 speakers. These speakers were designed to be used with an active equalizer; without it, the sound quality is quite poor.

There’s no crossovers or other passive components inside – just a bunch of individual speakers wired together to give the right impedance. About 11% of the sound is radiated from the single front-mounted speaker, and the remaining 89% of the sound is radiated from the back.

You’d have a range of +/- 24 dB in each band which would cover the full range of the 901 Active Equalizer. On the extremes, you’d have both equalizers gained up; in the middle, you’d only have the first gained up slightly and the second left flat.

Can you use a Kenwood equalizer in place of a Bose?

Thanks for writing, Jim! Can you use that Kenwood graphic equalizer in place of the bose? Short answer: It’s not recommended. Bose used a really interesting design concept for their 901 speakers. Each contains a set of nine, 4 1/2″ full range drivers wired in series-parallel.