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I have a friend who has a pair of Bose 901's..we both know about Bose's poor reputation, but that is what he has. He has a nice Adcom amp & preamp and an M&K dual 15" subwoofer. The speakers are hung from the ceiling. He understands their needs and limitations well. We both think their major weakness is the fact that they have a woofer and plenty of midranges, but no tweeter for the higher frequencies. I was thinking about removing two midranges per speaker and replacing them with equivalent resistance tweeters. Does anyone think that would help and do you know if the frequencies to the midranges go to 20,000hz?
Follow Ups:
Agree with the use of an L-pad to adjust levels.I would think a 4.0uF cap would bring the tweets in around 5Khz.Maybe a cheap Fountec or the RS/Lineaum tweeter.I believe RS had a stand-alone assembly with cap,to be tied in at the speaker input.
You will want to mount the assembly on top,so you can have some adjustment of phasing on the driver.
Tom:cat
...trying to get those pigs to sound good. Put them up on FleaBay and let someone else waste his time and money.There are soooo many other speakers available today that sound soooo much better - GoldenEar, Pioneer, Tekton, PSB, Klipsch, etc., etc.... Get rid of the 901s and be done with it...
-RW-
Edits: 02/24/15
Try reversing the speaker connections first. Reversing the phase 'may' help???I don't think it's a good idea to rip apart the speakers if they don't work well with that amp. Move onto another speaker or amp first.
Or look for a cheap, and I mean cheap, horn super tweeter. Like the kind RadioShack use to sell for around $7.
Ah, now we see what RS was used for?
charles
Edits: 02/23/15
Bose speakers are 9 of the exact same one ohm full range drivers in series as I remember.(or a series/parallel arrangement of higher Z drivers) Since he has two 15" subs bass will be fine it seems (setup and room dependent) Treble/high frequency would be an area to work on in all likelihood but you would probably want to do it via tone controls or an EQ (some 901's came with an EQ) Another good option would be an external self enclosed tweeter added on such as the one at the link which is a little more than I'd spend but gives you the idea.
E
T
from the link: We recommend using a capacitor as a crossover in the plus line to the tweeter, something from 0.47mfd to 1.5mfd.
play with a few values till you find one you like.
$430.00's worth of tweeters on a pair of 901's? Talk about gilding the lily.
And yet despite the look on my face, you're still talking.
I agree, couldn't find the lower cost ones, someone has them, Radio Shacks would have been fine if they were still around.
E
T
They stock a number of decent, reasonably priced bullet tweeters. The OP could mount one of these atop each 901 with its own highpass capacitor and maybe an L-pad volume control to help dial in the level.
I'm not sure how high those Bose goes on their own. You would really need to measure in-room response to find the -6dB point, and then calculate the highpass filter to the same -6dB point, for the tweeter to blend properly.
This will be for the series 2.
And yet despite the look on my face, you're still talking.
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