Swans M1 DIY, help please.

MagnumOpus · 18th February 2011, 12:34 AM

I am currently gathering parts for a Swans M1 build. And I have gotten almost everything sorted, except the inductors. I can't find the values given in the schematic anywhere. It says to get 0.58mh and 0.87mh, but the only ones I can find anywhere I look is either .56 and .90 and so on. What difference would that actually make, say if I got .60 and .90mh instead. In the older version of this xover it's used other values entirely for the inductors, but not resistors or caps. .65mh and 1.3mh are the values in one schematic I found, said to be an older inferior version og the one I am looking for inductors for.

Can anyone help straighten this out for me?

blue934 · 18th February 2011, 01:12 AM

you are right on the .58 and .87 being the most current revision. i just ordered my parts yesterday and went .56 and .90. i highly doubt anyone could hear 1% differentials. if your are truly concerned, by the slightly larger coils and an inductor meter and unwind a little.
if you want to give this a try, it might work. can't vouch for it myself but i was told it is reasonably accurate. this software tells you how much to unwind without a meter.?
Inductor Designer / Calculator

david

emile2 · 18th February 2011, 01:49 AM

I also doubt you'll be able to discern the difference in those coil values. You also have to recognize that the coils you are ordering are either +/-1% or +/-3% tolerance so the .56 you buy may be anywhere from .54 to .58 to begin with. The bigger factor here is driver tolerances so don't sweat it.

A cheep LRC meter can be had for $30 at amazon if you would like to check the coils values you are using.

MagnumOpus · 18th February 2011, 06:39 AM

I doubt I'll hear the difference aswell, so for convenience I might get the closest values. Just found out though, that I could get the values customized from the shop for an extra couple of bucks from the store. Thankyou for the reply

MagnumOpus · 23rd February 2011, 09:08 AM

Does anyone have the plans for Swans M1.2? I have seen this on a chinese (I think)site, but the pics were poor.

blue934 · 6th March 2011, 02:39 PM

the only actual box plans i have seen are on the chinese site and yes they are fuzzy. google will translate for you. the original box was .289cuft. with .75" walls but the revised design ,which i believe they still sell has 1" walls and is ~.38cuft.

the original plans create a very strong, inert box and i just modded the dimensions to get my .38 box from them.

i have collected everything i can find on this design over the years. a lot of it is not on the web anymore nor was archived. send me an email and i can send you what i have.

by the way, just finished mine yesterday. still breaking in but sounding very nice. will post pics soon.

david

MagnumOpus · 6th March 2011, 02:48 PM

Please do, thank you!

blue934 · 6th March 2011, 02:52 PM

ah, i forgot that i found an english copy of the plans from swans usa that are much easier to read than the chinese pics.

david

18th February 2011, 12:34 AM	#1
MagnumOpus diyAudio Member Join Date: Feb 2011	Swans M1 DIY, help please. I am currently gathering parts for a Swans M1 build. And I have gotten almost everything sorted, except the inductors. I can't find the values given in the schematic anywhere. It says to get 0.58mh and 0.87mh, but the only ones I can find anywhere I look is either .56 and .90 and so on. What difference would that actually make, say if I got .60 and .90mh instead. In the older version of this xover it's used other values entirely for the inductors, but not resistors or caps. .65mh and 1.3mh are the values in one schematic I found, said to be an older inferior version og the one I am looking for inductors for. Can anyone help straighten this out for me?

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18th February 2011, 01:12 AM	#2
blue934 diyAudio Member Join Date: Mar 2007	you are right on the .58 and .87 being the most current revision. i just ordered my parts yesterday and went .56 and .90. i highly doubt anyone could hear 1% differentials. if your are truly concerned, by the slightly larger coils and an inductor meter and unwind a little. if you want to give this a try, it might work. can't vouch for it myself but i was told it is reasonably accurate. this software tells you how much to unwind without a meter.? Inductor Designer / Calculator david

18th February 2011, 01:49 AM	#3
emile2 diyAudio Member Join Date: Feb 2011 Location: North East	I also doubt you'll be able to discern the difference in those coil values. You also have to recognize that the coils you are ordering are either +/-1% or +/-3% tolerance so the .56 you buy may be anywhere from .54 to .58 to begin with. The bigger factor here is driver tolerances so don't sweat it. A cheep LRC meter can be had for $30 at amazon if you would like to check the coils values you are using.

18th February 2011, 06:39 AM	#4
MagnumOpus diyAudio Member Join Date: Feb 2011	I doubt I'll hear the difference aswell, so for convenience I might get the closest values. Just found out though, that I could get the values customized from the shop for an extra couple of bucks from the store. Thankyou for the reply

23rd February 2011, 09:08 AM	#5
MagnumOpus diyAudio Member Join Date: Feb 2011	Does anyone have the plans for Swans M1.2? I have seen this on a chinese (I think)site, but the pics were poor.

6th March 2011, 02:39 PM	#6
blue934 diyAudio Member Join Date: Mar 2007	the only actual box plans i have seen are on the chinese site and yes they are fuzzy. google will translate for you. the original box was .289cuft. with .75" walls but the revised design ,which i believe they still sell has 1" walls and is ~.38cuft. the original plans create a very strong, inert box and i just modded the dimensions to get my .38 box from them. i have collected everything i can find on this design over the years. a lot of it is not on the web anymore nor was archived. send me an email and i can send you what i have. by the way, just finished mine yesterday. still breaking in but sounding very nice. will post pics soon. david

6th March 2011, 02:48 PM	#7
MagnumOpus diyAudio Member Join Date: Feb 2011	Please do, thank you!

6th March 2011, 02:52 PM	#8
blue934 diyAudio Member Join Date: Mar 2007	ah, i forgot that i found an english copy of the plans from swans usa that are much easier to read than the chinese pics. david

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