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Old 13th December 2004, 11:00 PM   #21
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Quote:
Originally posted by sam9
901's should be understood in the context of the world as it existed when the first came on the scene. I clearly remember that nearly any other speaker you listened to was very localized. It was very obvious that virtually all the sound was comming right out of a pair of boxes in the livingroom. Little or no imaging and no sense of "surround". I'm talking AR, Advent,KLH etc -- not K-mart or Radio shack. There were a handful of exceptions but they were rare and expensive (even comparred to 901's).
Yes, but those were the days when people put their speakers in the corners. It was only later that the benefits of pulling them out into the room became obvious. Right now I have my speakers 8' from the back wall and 5' from the side walls. Even the AR, Advent, KLH would have benefited from proper placement with respect to room surfaces. At least Bose offered placement suggestions with the 901s. Nobody else did, as I recall. I agree that the 901 made a good party speaker but it had no illusions to accurate reproduction.
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Old 13th December 2004, 11:48 PM   #22
Bose(o) is offline Bose(o)  Canada
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Okay, so I think the entire Bose thing is out of the way...let's help our new friend and teach not lecture, but mention the goodies of what else is there.

Maybe, after fixing his 901s he'd like to build something of his own or, try listening to other brands like Paradigm, Klipsch, etc.
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Old 14th December 2004, 12:39 AM   #23
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I don't recall that he mentioned specifically that the surrounds were rotted, although they most likely are. I suppose my views on foam speaker surrounds are well enough known that there's no need to go into that here. In short--yuck!
A simple visual inspection will tell the tale on the surrounds. Whether he has someone repair the drivers or does it himself is another matter.
Me, I'm with the earlier post that mentioned lighter fluid, but then it's been a long, hard day and perhaps I'm in a worse mood than I should be when bringing up the delicate topic of trashing Bose speakers when the fellow has made it his life-long dream to lay hands on them. Sigh. Someone find my diplomacy pills--I fear that I need them.
The post on bottoming the cones is reasonable also, especially given the boost the 901s need to even pretend to have real bass vs. the amount of low end in your average shoot-'em-up movie. Note that this amounts to a penalty paid with amplifier power. A speaker that had something more like flat response would not chew up amp power like that, leaving more leeway before clipping.
Uh, let me do my best to say this politely: Please save your money. Do not put it into the Bose in any way. Use it to buy another brand of speaker (new or used, your option) or to build a decent DIY project. There are scads of speaker projects out there that will provide better sound quality for less money.
Hype and advertising do not a decent speaker make. They weren't even good in the '70s and things have come a looong way since then.

Grey

P.S.: Better than Advents? Egad. I'm biting my tongue.
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Old 14th December 2004, 12:57 AM   #24
Bose(o) is offline Bose(o)  Canada
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Okay, I have a pair of 901 Series IV speakers at the ready to show you that it is nearly impossible to get them to bottom out. I HIGHLY doubt they are bottoming.

Since, all 9 drivers are connected in series, the voltage is divided between them so any EQ would be divided between the drivers. This is why Bose was allowed to get away with such a rigorous EQ.

The man may be hearing the effects of full-range IMD. But, with the 901s it seems that this is less apparent than with other full-rangers.

It takes a lot of juice and the right type of music to reach bottoming levels, but less juice to reach all-out IMD.
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Old 14th December 2004, 01:38 AM   #25
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The foam surrounds are not just subject to visual inspecton. They might look alright, but poke them a little and they may tear.

If you think the foam surrounds are the problem, here is the link to get the repair kit from Parts Express, $40, :
http://www.partsexpress.com/webpage....ctGroup_ID=373

Rotted surrounds can indeed cause voice coil rub, since the cone/voice coil assembly is suspended by the spider and surround. Lose one and voice coil rubs against the interior pole piece.

If the cabinets are in good shape and you like the Bose, and you are convinced it is the surrounds, then you should refoam the speakers. If nothing else, you might have something valuable for resale, should you decide that better speakers are out there.

PS: If you are refinishing the cabinet, do not use steel wool if the speakers are mounted in the cabinet. The magnet draws the airborne steel particles toward it, and the voice coil gap can get ruined.
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Old 14th December 2004, 03:23 AM   #26
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Why don't I believe that all drivers are connected in series?
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Old 14th December 2004, 03:41 AM   #27
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To the Bose Haters: I'll get these fixed and if I don't like them, I'll sell them. Someday (hopefully in the not-too-distant future) when I can afford to purchase my own system, I'll look into other stuff and decide then if Bose is all it's cracked up to be or not. Untill then, it's either fixing the 901's or using that money on a boombox or cheapo computer sub+satellite system, which I think everyone can agree will not sound as good as the Bose 901's.* Alas, that is the budget I'm working on in the here and now.

Quick question: how long does this kind of job take? Keep in mind I've never cracked these speakers open before, much less done a refoam job on them.

Thanks for all the input.

-Mark

*actually, if anyone disagrees with that statement, speak up!
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Old 14th December 2004, 04:03 AM   #28
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Whether the drivers are in series, parallel, or some combination of the two makes absolutely no difference as to bottoming.
Actually, I've heard some computer sub/sat systems that I'd consider superior to Bose 901s. The caveat is that I wasn't paying attention to the make and model. Sorry. The Bose will probably play louder than a computer system. Whether that's important to you is up to you. I know there was a time when volume was a lot more important to me than it is now. If I had to, I could live with a system that was limited in volume but gave me the quality I wanted.
Life is full of choices. Sometimes they're no-brainers. This one isn't that clear-cut. The 901s are, shall we say, limited. If they were the ultimate speaker, it would indeed be a no-brainer: Fix 'em and be happy. Sadly, they aren't on that level. That puts the burden on you. It's your dollar, and you'll have to decide how best to spend it.
I know it's a jolt to read that Bose is not all that great. I remember having a Panasonic all in one system back in the eary seventies. I thought I was something! The reality was that it was barely on the mid-fi scale, probably more low-fi. That was a bitter pill to swallow. Things have gotten better since, though.
Toss out a dollar figure that you'd be willing to spend. I'd be surprised if kelticwizard and some of the others couldn't suggest a few project speakers that would be worth at least looking at.

Grey
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Old 14th December 2004, 01:03 PM   #29
jmikes is offline jmikes  Canada
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Quote:
Originally posted by Bill Fitzpatrick


Yes, but those were the days when people put their speakers in the corners. It was only later that the benefits of pulling them out into the room became obvious.
Well, I'm from those days and we didn't put our speakers into corners unless they were tiny and needed the bass boost. 901s were easily the best speakers of their day because they spread the sound around, and gave you a sense of being enclosed in the music, as opposed to having it beamed at you. Time does march on and they are no longer the cutting edge, but that doesn't mean we should diss them. They were the `55 Chevies of speakers and we should respect them for that, instead of ripping them because the company later made huge profits from the AM series.
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Old 14th December 2004, 01:05 PM   #30
jmikes is offline jmikes  Canada
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Quote:
Originally posted by GRollins
. There are scads of speaker projects out there that will provide better sound quality for less money.
Sure. And there are scads that will give you good sound if you park yourself in one spot and don't move more than a foot or two.
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