B&W DM603-S3's Anyone? - diyAudio
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Old 4th September 2002, 09:35 PM   #1
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Default B&W DM603-S3's Anyone?

I have a pair of these for my main stereo and HT system, but I can't find much information about them anywhere on the web.

If anyone can point me in the direction of crossover schematics, impedance curves and frequency responce curves that would be great, also has anyone tried to mod these speakers?

Cheers for looking




If nobody can help me with this particular model does anyone know if B&W's in general have a fairly level frequency responce in this price range? ~£600 ($900)
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Old 5th September 2002, 06:40 AM   #2
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I am quite sure their freq. response it flat till the very high end but find them too bright.

what may be "level" to an oscilloscope might not be level to your ears. it is there best to listen to the speakers.

i have really wanted to like the B&W 603 series (I was a big fan of the 801s in the 80s and early 90s) but...

maybe it was my electronics or room...

B&W gets their drivers customs made (I guess in China - almost all big makes get their drivers from China).

From what I know the 603 are fairly easy to drive and have reasonable full range response (about 30Hz to 20k+). With 2 lower bass drivers and a dedicated midrange they should be.

why would yo need the schematics. the crossovers are complex and modelled on expensive machines and I doubt it makes much sense to try and duplicate these speakers as the drive usnt are ot commercially available. if howevre you do need help ask B&W direct. include the S/N numbers.

regards
Navin
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Old 5th September 2002, 06:47 AM   #3
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Quote:
B&W gets their drivers customs made (I guess in China - almost all big makes get their drivers from China)
They indeed use custom made drivers - but they do them on their own in England, even those for the cheaper models. I've been visiting B&W last year - no kidding, no chinese stuff.
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Old 5th September 2002, 07:02 AM   #4
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oops! I know smaller (in sales) well respected marques that import from China. I am not saying that chinesse stuff if bad just that it is very price worth (cant find the english word but we have a word for "value for money" - German readers will understand -Hindi and German have the same root and our grammar is very similar). It means you get 80% of quality for 10% of price or there abouts.
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Old 5th September 2002, 10:47 AM   #5
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Just a little impression from the B&W plant in Steyning, Sussex.
They are producing bass units for the DM series here:
Click the image to open in full size.
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Old 5th September 2002, 10:52 AM   #6
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nice photo.

in any case not much we DIYers can do to get these drivers right?
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Old 5th September 2002, 11:04 AM   #7
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You are absolutely right. No chance for DIYers.
---
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Old 5th September 2002, 08:33 PM   #8
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Quote:
Originally posted by navin
I am quite sure their freq. response it flat till the very high end but find them too bright.

what may be "level" to an oscilloscope might not be level to your ears. it is there best to listen to the speakers.

i have really wanted to like the B&W 603 series (I was a big fan of the 801s in the 80s and early 90s) but...

maybe it was my electronics or room...

B&W gets their drivers customs made (I guess in China - almost all big makes get their drivers from China).

From what I know the 603 are fairly easy to drive and have reasonable full range response (about 30Hz to 20k+). With 2 lower bass drivers and a dedicated midrange they should be.

why would yo need the schematics. the crossovers are complex and modelled on expensive machines and I doubt it makes much sense to try and duplicate these speakers as the drive usnt are ot commercially available. if howevre you do need help ask B&W direct. include the S/N numbers.

regards
Navin
I think you may have misread my original post - I OWN THESE SPEAKERS.

They do sound really nice and I tend to like detail in my treble so I don't mind too much that they are bright (although I wouldn't say they were overly bright compared to some makes).

The reason I want to see the crossover schematics is to possibly employ active bi-amping and I'd like to see the impedance and frequency response curves as I'm curious about these (especially at the low frequencies when two drivers come into play, although I believe you are wrong about the dedicated mid-range as itís a 2.5 way not 3 way if you do your homework).

Thanks for the post anyway - and it's good to find out they're made in Might Blighty (and not China!) too as I have to say I like British made products - must be my patriotism.
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Old 5th September 2002, 08:37 PM   #9
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HBarske,

...any response from your cisit to the factory?

Are you a fan of the DM603s? Any more pics?

Cheers for the post by the way - good to learn they're home grown drivers.

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Old 5th September 2002, 09:12 PM   #10
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annex666,
yes, lots of resonse from that visit.

Those guys are really crazy about speakers and they perhaps know more about dynamic speakers then anyone else in the world.
They have the future of the loudspeaker in their drawers, I am sure.

More than twenty very experienced people doing the whole day nothing but designing speakers - very impressive.
Enormous amount of technology (several laser interferometry units and a lot of very expensive things I don't remember) and the most impressive thing is: they run extensive simulations on something - and the then they build it: it is doing exactely what the computer said. Unbelieveable. No problem there, they have some very nice rapid prototyping units there.

Am I a fan of the DM603S3? Oh yes, I am. Never listened to an affordeable compact speaker that produced such big sound like the B&Ws. Okay, I prefer the Nautilus 800, but that's another story

More pictures from there? No problem, but give me some days for searching the CDs and resizing/uploading
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