B&W DM601 crossover shematic - anyone

r!sc! · 4th September 2004, 10:48 AM

Hi,

i need crossover schematic for DM601 (s2), so is there anyone who want to help

.

Thanks, Boban

jomor · 4th September 2004, 10:25 PM

I own the BW DM601 first edition, i m not sure if its the same with the one you re asking.

Its a parallel crossover with 1st order low pass and a 3rd order hi pass. It also has a resistor to lower the tweeter's output. The inductors' values are not mentioned. The crossover's x frequency is 3Khz. There isnt any zobel or notch filter. The high pass filter's capacitors are 10ìF and 4.7ìF electrolytics ( which i replaced them with polypropylene ones of course, and the sound improved tremendously)

Sorry if i wasn't much helpful

r!sc! · 4th September 2004, 10:29 PM

Thanks jomor, very usefully.

Boban

Liamadams · 16th November 2011, 08:23 AM

Hi there to both of you.
I am just wandering... Jomor, I have just bought a pair of DM601's and am interested in changing the capacitors for polypropylene ones. I have seen ones available on the Maplin website here: -

Audio-Grade Polypropylene Axial Capacitors : Polypropylene : Maplin Electronics

However, if you look, the units of measurements are 'uF' which I'm guessing is microFarrads. Is this the same as the ìF that you have written above? And also, should I only change the capacitors on the high pass filter or should I do the low as well? And finally, do you know of anywhere cheaper to buy these capacitors at all. Not that they are that expensive anyway but it's always nice to save a bit of cash.

Many thanks

fatmarley · 02:55 PM

iF is a mistake. And yes uF is microfarrads.

Sometimes you get big upgrades when replacing elecrolytics with polyprops and sometimes nothing happens.

These sound pretty good and they're cheap: Mundorf MCap MKP Polypropylene Film Audio Capacitors

If you want a nice neutral sounding cap, the Ansar polyprops are good and not too expensive (ATC use them IIRC): http://www.cricklewoodelectronics.co...me.php?cat=155

bolserst · 16th November 2011, 05:31 PM

Quote:

Originally Posted by r!sc!

i need crossover schematic for DM601 (s2), so is there anyone who want to help

.

Here ya go...circuit on page 9, parts values on page 7.

Manual came from here:
B&W Loudspeaker Service Manuals Available

Inductor · 11:43 PM

Quote:

Originally Posted by Liamadams

should I only change the capacitors on the high pass filter or should I do the low as well?

Do you have caps in the low pass filter?

Only L1=0.95mH inductor for a 1st order and a 3rd order high pass.

4th September 2004, 10:48 AM	#1
r!sc! Account Disabled Join Date: Jun 2003 Location: Serbia	B&W DM601 crossover shematic - anyone Hi, i need crossover schematic for DM601 (s2), so is there anyone who want to help . Thanks, Boban

16th November 2011, 02:52 PM	#5
fatmarley diyAudio Member Join Date: Aug 2003 Location: Cheltenham	iF is a mistake. And yes uF is microfarrads. Sometimes you get big upgrades when replacing elecrolytics with polyprops and sometimes nothing happens. These sound pretty good and they're cheap: Mundorf MCap MKP Polypropylene Film Audio Capacitors If you want a nice neutral sounding cap, the Ansar polyprops are good and not too expensive (ATC use them IIRC): http://www.cricklewoodelectronics.co...me.php?cat=155 Last edited by fatmarley; 16th November 2011 at 02:55 PM.

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4th September 2004, 10:25 PM	#2
jomor diyAudio Member Join Date: Feb 2004 Location: Athens	I own the BW DM601 first edition, i m not sure if its the same with the one you re asking. Its a parallel crossover with 1st order low pass and a 3rd order hi pass. It also has a resistor to lower the tweeter's output. The inductors' values are not mentioned. The crossover's x frequency is 3Khz. There isnt any zobel or notch filter. The high pass filter's capacitors are 10ìF and 4.7ìF electrolytics ( which i replaced them with polypropylene ones of course, and the sound improved tremendously) Sorry if i wasn't much helpful

4th September 2004, 10:29 PM	#3
r!sc! Account Disabled Join Date: Jun 2003 Location: Serbia	Thanks jomor, very usefully. Boban

16th November 2011, 08:23 AM	#4
Liamadams diyAudio Member Join Date: Nov 2011	Hi there to both of you. I am just wandering... Jomor, I have just bought a pair of DM601's and am interested in changing the capacitors for polypropylene ones. I have seen ones available on the Maplin website here: - Audio-Grade Polypropylene Axial Capacitors : Polypropylene : Maplin Electronics However, if you look, the units of measurements are 'uF' which I'm guessing is microFarrads. Is this the same as the ìF that you have written above? And also, should I only change the capacitors on the high pass filter or should I do the low as well? And finally, do you know of anywhere cheaper to buy these capacitors at all. Not that they are that expensive anyway but it's always nice to save a bit of cash. Many thanks

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