Hello,
I've got some problems here
, I order two monacor subs by bmm-elektronics.
After ordering I pay direct with Ideal. The order was send 2.5week later.
Direct was clear one sub was defective the second seemed OK but after testing it in the box this week it has the same problems as the first one.
Manufacturing fault or transport damage on the outside they look ok.
I will keep you updated with the Guaranty completion of BMM. Till now I send one back and send after that three emails without reaction
Till then the project stops.
I've got some problems here
, I order two monacor subs by bmm-elektronics.After ordering I pay direct with Ideal. The order was send 2.5week later.
Direct was clear one sub was defective the second seemed OK but after testing it in the box this week it has the same problems as the first one.
Manufacturing fault or transport damage on the outside they look ok.I will keep you updated with the Guaranty completion of BMM. Till now I send one back and send after that three emails without reaction
Till then the project stops.
Helmuth, sorry to hear of your driver problems...
if they persist, perhaps a different driver?
Monacor drivers are reputably excellent , considering their price. Not sure what else is available in Europe that may be similar (brands available here vs. there are different....).
In what way are they defective? if just dustcap glue. you can peel the dustcaps off (usually) and replace or re-glue them.
What is the calculated volume for the sub enclosure?
stew
if they persist, perhaps a different driver?
Monacor drivers are reputably excellent , considering their price. Not sure what else is available in Europe that may be similar (brands available here vs. there are different....).
In what way are they defective? if just dustcap glue. you can peel the dustcaps off (usually) and replace or re-glue them.
What is the calculated volume for the sub enclosure?
stew
The nett enclosure volume is 68 liter.
Listing to to sub it actually did have response down to 26Hz and keeps on working down to 18Hz.
So I am very content with the sub it is really a impressive performing chassis.
I hope it only a quality problem off the manufacturer. And the that the shop helps to solve this problem quick.
Listing to to sub it actually did have response down to 26Hz and keeps on working down to 18Hz.
So I am very content with the sub it is really a impressive performing chassis.
I hope it only a quality problem off the manufacturer. And the that the shop helps to solve this problem quick.
I think the foam must be open cell type and of reasonable density to be an effective absorber.
Illbruck's Sonex* Pyramid stype acoustic foam has a density of 0,5 to 0.7 lbs/cu. ft. and doesn't do much absorbtion below 500 hz. Above that it improves quickly from .5 to about 1 in the 4-5 kHz range.
See http://www.illbruck-sonex.com/pdfs/Pinta_Product_Sheets/PSpinta_SNXpyramid.pdf
* Illbruck is a long recognized leader in the manufacture of acoustic foam panels.
Illbruck's Sonex* Pyramid stype acoustic foam has a density of 0,5 to 0.7 lbs/cu. ft. and doesn't do much absorbtion below 500 hz. Above that it improves quickly from .5 to about 1 in the 4-5 kHz range.
See http://www.illbruck-sonex.com/pdfs/Pinta_Product_Sheets/PSpinta_SNXpyramid.pdf
* Illbruck is a long recognized leader in the manufacture of acoustic foam panels.
kukuruku said:hi helmut i look your project and that is interesting for me, what you say about dt-25n, ms-150, sph-250ctc for speaker system. Ms-150 maybe better beacouse it is close construction
Why ms150 for that price mutch nicer chassis are to find. I do not restrict my self to monacor.
And witch frequency you want to filter?
I want made active system with Balance input, frequency at active crossover 350Hz, 2500Hz. price 17.7euro middle choise and ms-150 have matching closed volume dampened - we are haven't problem with midrange driver 
,
Can't lowrange interact at midrange
then we need to additional correct system
, Can't lowrange interact at midrange
then we need to additional correct system
If you want high quality balanced input amplifiers see here. Super low distortion.
http://www.bmm-electronics.com/Product.asp?Product_ID=4709
I don't want to filter at 2500Hz. Phase fault, sound pressure level variation interference distortion. And that all in the part where the ears are the most sensitive.
I will filter in a aria were the sensitivity of our ear has reduced largely.
Here the figure of our hearing. And I have marked the aria where I don't want to filter.
That is why it is very important to find a High quality midrange driver because this aria is our ear the most sensitive.
So the midrange driver makes or brakes the response of your system IMO.
Regards Helmuth
Attachments
If you want high quality balanced input amplifiers see here. Super low distortion.
http://www.bmm-electronics.com/Prod...Product_ID=4709
Thankyou for the propouse, i will make balance, active crossover and amplifier (lm3886) myself
http://www.bmm-electronics.com/Prod...Product_ID=4709
Thankyou for the propouse, i will make balance, active crossover and amplifier (lm3886) myself
When your searching for a very good low price midrange from monacor I advise you The msh115. Nice flat response up to 10kHz.
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And as tweeter a ribbon rbt95sq. Not expensive top performance above 5kHz. (I advise 8kHz.)
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An externally hosted image should be here but it was not working when we last tested it.
I hope I help you with this tip Kukuruku .
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