Any photos of Bose inards?

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CaliHwyPatrol

CaliHwyPatrol

Audioholic Chief
Sheep said:
I actually saw a cross section of one of the cube speakers. It was a very nice display, but the unit itself wasn't.

The driver looks very weird. Sorta like a subwoofer driver, but tiny.

SheepStar
I had a feeling they looked like that, but I want to see for myself. :D

~Chuck
 
Z

zumbo

Audioholic Spartan
Hi Ho said:
This is not meant to be a Bose bashing thread. If you do a search on my name, you will see that I do not participate in Bose bashing. I also do not claim to know everything. I most certainly do not.

I do not like Bose, mainly because of their deceptive marketing and extreme pricing. Their "top of the line" $4,000 system can't be worth more than $400. I'll bet most people on this forum feel the same way. You are in the minority.

I don't like Monster or other "high end" cable vendors for similar reasons, extreme prices and very deceptive marketing. I don't like Sony either, for a variety of reasons. There are many companies I do not like.

This thread is not meant to be a bash fest. There are enough of those on audiophile forums all over the net.

Do I care if the average Joe goes out and buys himself a Bose system? Well... yes. Why? Because I don't like to see unsuspecting people blowing their money on stuff that they think is top notch. I feel the same way about Monster. Sony is one company which I really cannot stand. I try as hard as I can to persuade people not to buy Sony products. The recent root kit debacle was the last straw with me. I can't change everyone's mind and I don't mean to. I can try, however, to keep people from getting ripped off and pumping more money into the marketing machines that are Bose, Monster, and quite a few other companies.

I learned long ago that name recognition means nothing. I have had enough poor quality products (power tools, lawn equipment, electronics, you name it) from companies that used to have a good reputation and made good stuff. So many of them have gone by the wayside while their name recognition keeps their sales going strong. Bose has never made stand-out products and yet their name is probably the most recognized name in audio.

I truly am curious about what is actually inside the Bose systems. I don't have thousands of dollars to buy one and rip it apart.

Sheep, thanks for the response. That picture of the plexiglass model is the one picture I did find on Google. I should have mentioned it. I guess no one has had the will to rip apart a $300 system that cost $3,000? :)

By the way, Jeffsg4mac, that picture is hilarious, yet surprisingly accurate! :D
I agree 100%. Well said. This is one of the reasons for this site. To prevent people who don't know better from buying into a gimmick. Some people were raised by parents who believed in a brand. They would buy that brand no matter what. No research or anything. I am not one of those people. But, I have to admit, I do have preference. It is my starting point. Not the selling point.

Are Bose drivers still paper?:confused:
 
annunaki

annunaki

Moderator
Ranjeet Rain and Sheep: Please stop the personal squabbles! PM each other or take it to the Steam Vent.
 
WmAx

WmAx

Audioholic Samurai
CaliHwyPatrol said:
I found an extra dual-cube speaker at work. I'm going to bring it home and cut it up, and I will take some pics as I go. Pictures will be posted following the operation!

~Chuck
If this is a fully functional modern version of the dual-cube, I would be willing to measure the product and post the summary and graphs on this forum before you destroy(disect) the product. Measurements would include: THD+N vs. SPL at several frequency points, off-axis and on axis frequency response, incremented over several reference points, and a CSD(waterfall) plot.

-Chris
 
M

mustang_steve

Senior Audioholic
I just bash Bose where they deserve it.

There are obviously some talented people working for them, and they do have some decent concepts in use in their speakers....but they just need to start using better drivers and crossovers to start with. If they moved their driver technoloy out of the 60s and into the new millenium, they might be competitive in some degree.

They also need to work on the "jewel cube" speakers, and give those a radical redesign. Maybe take a cue from the omnidirectional speakers of days gone by (like the Sansui SF-2), and make a omni satellite version using better drivers and such.

Pretty much their biggest problem is a tremendous lack of innovation as far as the actual loudspeakers go. Their quietcomfort headset and their lifestyle consoles are very slick to say the least....it's just the speakers....well cloth surrounds and those "sotck car speaker" looking drivers are a no-no.
 
Hi Ho

Hi Ho

Audioholic Samurai
Did you ever get around to chopping up that speaker CaliHwyPatrol?
 
CaliHwyPatrol

CaliHwyPatrol

Audioholic Chief
Oh dammit, I forgot until I saw this thread again... I'll see if I can find the speaker at work tomorrow! Thanks for reminding me! :eek:


~Chuck
 
R

rtcp

Junior Audioholic
Sorry for bringing up an old thread, but I do have some firsthand pictures of a pair of 1994 Bose 701's. I only took apart what I could put back together. I haven't resized these beyond what the hosting would change, so I'm posting them as links.

http://i52.photobucket.com/albums/g34/aliasname/116_1610.jpg
http://i52.photobucket.com/albums/g34/aliasname/116_1611.jpg
http://i52.photobucket.com/albums/g34/aliasname/116_1612.jpg
The only easy access to the innards is through the bottom, by removing five feet.
http://i52.photobucket.com/albums/g34/aliasname/116_1615.jpg
Removing the bottom plate gives you access to the woofer, as well as the crossover, which is mounted on the bottome plate.
http://i52.photobucket.com/albums/g34/aliasname/116_1614.jpg
http://i52.photobucket.com/albums/g34/aliasname/116_1613.jpg
http://i52.photobucket.com/albums/g34/aliasname/116_1619.jpg
http://i52.photobucket.com/albums/g34/aliasname/116_1622.jpg
http://i52.photobucket.com/albums/g34/aliasname/116_1623.jpg
This driver appears somewhat reminiscent of those carbon-fiber paper Scanspeak drivers, only inside out(Sorry, I had to throw in some light-hearted blasphemy).
http://i52.photobucket.com/albums/g34/aliasname/116_1624.jpg
Underneath the driver was something a little unexpected.
http://i52.photobucket.com/albums/g34/aliasname/116_1627.jpg

Here's a diagram that might make sense of it.
http://i52.photobucket.com/albums/g34/aliasname/116_1631.jpg

I didn't take apart the top portion where the remaining drivers are.
 
Sheep

Sheep

Audioholic Warlord
Leave it to Bose to come up with something that stupid.

SheepStar
 
Jack Hammer

Jack Hammer

Audioholic Field Marshall
Huh?

Sheep said:
Leave it to Bose to come up with something that stupid.

SheepStar
Sorry, I don't understand speaker/crossover/cabinet design very well. Besides everything looking kinda cheap to me, what do you mean? What's stupid about it? :confused: (honest question, not starting something)
 
zildjian

zildjian

Audioholic Chief
Sheep said:
Leave it to Bose to come up with something that stupid.

SheepStar
What are you referring to? You have to have something more insightful than that to say. The guy showed the construction of a bandpass design sub portion of a speaker; a design not invented by Bose.
Brad
 
Buckeyefan 1

Buckeyefan 1

Audioholic Ninja
That would be a $25 driver (to you and me; $3 to Bose), and about $1 worth of parts making up the crossover. I'm sure that doesn't surprise anyone.

rtcp - thanks for taking that apart. IYHO, how does it sound?
 
zildjian

zildjian

Audioholic Chief
I'm most surprised by how cheap the crossover is. Everything else is pretty much what I expected.
 
Sheep

Sheep

Audioholic Warlord
zildjian said:
What are you referring to? You have to have something more insightful than that to say. The guy showed the construction of a bandpass design sub portion of a speaker; a design not invented by Bose.
Brad
You may want to look up that certain bandpass design and its pros/cons. It wasn't a knock against him, I'm glad he posted photos, now you can see why this design is bad.



SheepStar
 
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R

rtcp

Junior Audioholic
Buckeyefan 1 said:
That would be a $25 driver (to you and me; $3 to Bose), and about $1 worth of parts making up the crossover. I'm sure that doesn't surprise anyone.

rtcp - thanks for taking that apart. IYHO, how does it sound?
Honestly, I've barely fired them up. I "inherited" them. Besides, I don't really want to get involved.
But the crossover looks like it could be assembled by a small child.
 
Buckeyefan 1

Buckeyefan 1

Audioholic Ninja
Sheep said:
You may want to look up that certain bandpass design and its pros/cons. It wasn't a knock against him, I'm glad he posted photos, now you can see why this design is bad.



SheepStar
I love bandpass design. If done right, it's amazingly efficient as well as powerful.

Here's some info from JL Audio on bandpass.

"A properly designed, constructed and implemented bandpass enclosure can and often will out-perform the same driver or drivers in a more conventional sealed or ported design in terms of sheer output and/or low-frequency extension...

A bandpass enclosure can produce significant performance benefits in terms of efficiency and/or deep bass extension that would not be possible in conventional designs of equal size.

By adjusting the volumes of the front and rear chambers and the tuning of the port or ports, significant performance trade-offs can be created. When box parameters are adjusted for a narrower bandwidth, the efficiency of the subwoofer system within that bandwidth increases and can reach gains of up to 8dB (sometimes even higher.) As box parameters are adjusted for wider bandwidths, very impressive low-frequency extension can be produced from extremely compact enclosures at the expense of efficiency and good transient response. Intermediate bandwidths can also be designed which create a compromise between all these characteristics. As if that is not confusing enough, within each bandwidth range, the designer can also manipulate box parameters to shift the range of operation up or down the sub-bass range which also has an effect on efficiency.

As you can see, bandpass enclosures can have very different sound characteristics based on the designer's choice of box parameters. As such, it is not always possible to make blanket statements as to the performance benefits and drawbacks of bandpass enclosures in general.

One characteristic of bandpass enclosures which is universal is that they exert greater control over cone motion over a wider frequency band than conventional designs. Due to controlled, rapidly changing air pressure on either side of the woofer, the woofer is capable of producing high levels of acoustic output without physically moving very much."
http://mobile.jlaudio.com/support_pages.php?page_id=151
 
gene

gene

Audioholics Master Chief
Administrator
Those are awesome $0.75 tweeters :D I love the stamped metal basket woofers too. If these speakers sold for $125/pair they would be a great value.

I am not sure why they have an electrolytic cap in parallel with one of the tweeters. I have to see the rest of the crossover to know whats going on but it looks like its wired in series with a woofer and other elements in the other enclosure.

I am surprised they actually stuffed the cabinet with insulation. They get a brownie point for that.

I love how they tied up the cables. It looks so professional :)
 
zildjian

zildjian

Audioholic Chief
that capacitor should be acting as a simple passive high pass filter for the $0.75 tweeter.
If it's in series with the woofer too, maybe it's also acting as an inductor for the woofer (passing the low frequencies).
 
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