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Bose 901 any eq work

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NO!

Each series of 901 has a unique EQ box just for that series.

If you can't find the correct Bose EQ, the Mini DSP can be used and programmed for each series.
 
Any Series Bose Equalizer or a any equalizer from a different manufacturer?

If you're asking about any equalizer then the answer is no.
You can't get the gain that the Bose 901 equalizers provided to work specifically for those 901 speakers.

If you're asking if any Series Bose Equalizer, for the 901's, will work with any Series Bose 901's.... more research would be need but, I can narrow it down a bit.

The Series I and Series II 901's were a sealed cabinet and those two equalizers will work with either of those two 901's
When Bose went to the Series III 901 they added ports to the cabinet to help with efficiency. Any Bose Equalizer from the III's up to their final 901IV version will not work with the I or II Series nor will the Series I & II work with the III's up to the IV's.
However, will the equalizers be the same from the III to the IV 901's....... Don't know the answer to that one, more research would be needed.

After some internet searching....
Nope, the other Bose 901 Equalizers are specific to the Series 901 that it was designed for.

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Any Bose 901 Eq will work but not be correct. It is generally thought that the I & II speakers can use a I or II eq. Similarly 3 & 4 can interchange as can 5 & 6.

You can get a minidsp set up to be an eq for the different series speakers from deer creek. Might find the Bose eq cheaper on the bay.
 
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And if they are series 3 or above, check the condition of the surrounds - the foam decomposes, and that's a lot of drivers to refoam. I've done it twice for a friend, but it is tedious in the extreme.
 
I believe you can buy a reconditioned/ restored equalizer directly from Bose. I did a bunch of years ago.
 
I helped a friend's Dad who had misplaced the EQ for his 901 series 1 or 2's. I just added an old AudioSource 10 band eq and boosted the highest the lowest bands all the way, with the next lowest and highest almost as much. Think of the classic "Smiley Face" curve but keeping most of the middle flat and only affecting the extremes. If you think of what a 4 inch drivers is capable of, it makes sense.

Worked fine and he's using it to this day.

Jblnut
 
Well can get a nice pair of Bose 901 speakers for 100.00,no eq will any eq work them ?

When it comes to this question people seem to have a wide definition of "works".

General rule of thumb is the EQs are same/similar enough for the series pairs as follows -

Series I/II
Series III/IV
Series V/VI

If you really had to broaden things to get by I'd say Series I/II, then Series III, IV, V, and VI. Since I and II are sealed and the rest ported, there's bigger differences between the curves at that split.

And, yes, a plain old graphic EQ will "work" in loose terms, better than no EQ at all, but still will not be a very good approximation of the proper Bose curves.
 
The bose eq does like +18db IIRC

+/- 12 db eq minimum I would think.....and a proper db meter.

There would be a lot of pulling the mids down to get close,.....stout amp would help.
 
Absolutely agree with whoaru99...

Any regular equalizer will work but those do not have the gain of the Bose Equalizers.
Never heard of one with that amount of gain but, there may be some out there?
 
The bose eq does like +18db IIRC

+/- 12 db eq minimum I would think.....and a proper db meter.

There would be a lot of pulling the mids down to get close,.....stout amp would help.

I tried to approximate the curve on GEQ some years back but I can't find the photos of the settings.

Still was fairly crude approximation and as I recall, it wasn't as straightforward as a simple symmetrical smiley curve.

A multiband parametric eq probably could get closer, but at that point I'd think just get the real deal or a programmed MiniDSP if you're really set on being the way it's supposed to be.
 
Yea, I have a Parametric EQ and it still doesn't have enough gain to match the Bose EQ. Their use of high Gain is what makes the 901's sound as good as they do. Very hard to get the needed freq. responses and boosts that Bose did with their little 901 boxes.
Have to remember they're trying to produce all frequency's with 9 small drivers of equal size in such a small box.
It is possible there are some out there but I've never seen one with that much gain.

That's the issue with using the non-Bose EQ's.
 
I understand, and recall I did not say match, I said closer (closer encompassing total picture including shape).

FWIW, I have other posts showing measured/graphed traces of Series II and Series VI EQs.
 
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Got a pair of Bose 901 speakers for 100.00 no stands or eq.have some stands and a few eqs.nice shape drives all good.have. 2 other pairs of Bose but my first 901s.they should be ok with a standard eq correct or is a 901 eq needed ?
 
Need the Bose Eq. I had some decent luck using a mini DSP plus some tone controls tho. The proper EQ was much simpler
 
Hell lost my mind,already posted on these 901s.got a lot of great answers.well anyway glad I got them.always wanted a pair.but I did get the wife evil eye look.better go buy her some video games.video games for her audio gear for me.beats the hell,out of cigs and booze.well maybe not to some people.
 
Thought you had mentioned an eq-less set of 901s a few weeks ago. Good idea to get her some hobby gear, too.
 
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