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Multi-Way Conventional loudspeakers with crossovers

New crossover for my current speakers
New crossover for my current speakers
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Old 29th November 2017, 11:24 AM   #41
EarlK is offline EarlK  Canada
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Niklas,

Hold off on ordering anything for at least a day .

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Old 29th November 2017, 11:52 AM   #42
Rullknufs is offline Rullknufs  Sweden
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New crossover for my current speakers
Quote:
Originally Posted by EarlK View Post
Niklas,

Hold off on ordering anything for at least a day .

No problems, I'll wait till Friday
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Old 1st December 2017, 12:02 AM   #43
EarlK is offline EarlK  Canada
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Originally Posted by Rullknufs View Post
Okay, in that case I'll stick to the cheaper Mundorf E-Cap Plain and save some money.
So, 15uF, 22uF, 2x1R, 2x1.5R. Is there anything else I should add?
Hi Niklas,

Whenever you want, please order:

2x 15uF BiPolar caps, 2x 1R 5watt resistors, 2x 1.5R 5watt resistors



PS; no 22uF caps
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Old 1st December 2017, 06:18 AM   #44
Rullknufs is offline Rullknufs  Sweden
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New crossover for my current speakers
Quote:
Originally Posted by EarlK View Post
Hi Niklas,

Whenever you want, please order:

2x 15uF BiPolar caps, 2x 1R 5watt resistors, 2x 1.5R 5watt resistors



PS; no 22uF caps
Done!

Also, I found a cheaper website and managed to get total cost down from 200SEK to 80SEK, including shipping. Sure, no Mundorf components but I'm sure they'll be good enough for these measurements.
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Old 7th December 2017, 11:00 AM   #45
Rullknufs is offline Rullknufs  Sweden
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New crossover for my current speakers
I got the parts a couple of days ago but haven't had time to do any measurements. I'm also trying to figure out how to connect everything in a practical way. I can't jam three sets of cables into my amplifier. I need to make some sort of hub or something.

Also, for the measurements, should I use one of the 15uF caps or should I use both in parallell?
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Old 7th December 2017, 11:39 AM   #46
AllenB is offline AllenB  Australia
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You could try screw terminals.
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Old 7th December 2017, 03:14 PM   #47
EarlK is offline EarlK  Canada
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Quote:
Originally Posted by Rullknufs View Post
I got the parts a couple of days ago but haven't had time to do any measurements. I'm also trying to figure out how to connect everything in a practical way. I can't jam three sets of cables into my amplifier. I need to make some sort of hub or something.

Also, for the measurements, should I use one of the 15uF caps or should I use both in parallell?
Parallel the (2) 15uF caps together.

Also, unless your test amp is stable into 2ohms , add a single 1.5R resistor inline to the whole load so it's around 4 ohms
- ( you could simply connect this resistor off the red terminal of your test amp if it's easier for making connections ).

Electrical supply wire-nuts can be used for wire-combining .


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Old 9th December 2017, 09:24 AM   #48
Rullknufs is offline Rullknufs  Sweden
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New crossover for my current speakers
Quote:
Originally Posted by EarlK View Post
Parallel the (2) 15uF caps together.

Also, unless your test amp is stable into 2ohms , add a single 1.5R resistor inline to the whole load so it's around 4 ohms
- ( you could simply connect this resistor off the red terminal of your test amp if it's easier for making connections ).

Electrical supply wire-nuts can be used for wire-combining .


Alright. I don't think my amp (Harman Kardon HK3490) will be too happy about a 2ohm load so I'll use a resistor. I got some wire nuts yesterday. Never used them before and I have no idea how they work and I don't think I'll be able to fit a bunch of 2.5mm^2 cables in there, but luckily I found some 0.5mm^2 cable that should be long enough for what I need for this project.
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Old 9th December 2017, 01:02 PM   #49
Rullknufs is offline Rullknufs  Sweden
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New crossover for my current speakers
Click the image to open in full size.
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It was difficult setting up the microphone but I think I managed to get the difference in distance between the mic and the woofers to within around 5-10mm. Is that good enough or should I try harder? For the tweeter measurement I set it to 500-20.000Hz but for the rest I set it at 20-20.000Hz. Eight sweeps at 1M length.

I can't upload the .mdat file here since it's too big. The .mdat file is 8.7MB and if I zip it I can get it down to 5.31MB but that's still too big for being uploaded here.
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Old 9th December 2017, 01:25 PM   #50
EarlK is offline EarlK  Canada
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Hi Niklas,

You'll need to redo those measurements ( I believe you moved the mic if I read your words correctly ) .

Oh, REW doesn't handle multiple sweeps well >> so just do a single sweep of each position.

Make sure the mic is centered on the tweeter axis ( horizontal & vertical ) then ( in order ) ;

(i) Make a fullrange measurement at 1 Meter
(ii) Then make a tweeter only measurement ( 100hz & up ) without moving the mic
(iii) Then make a 2x woofers measurement ( fullrange ) without moving the mic from the "on-tweeter" axis.
(iv) OK, this is new.
- Make a single woofer measurement on axis ( vertical & horizontally ) centered on the woofers dustcap from 1 Meter away.


I'll PM you with my email address so that you can send me the .mdat file .

cheers <> Earl

EDIT: PM sent with email address

Also ( after looking at the combined responses > it looks like your tweeter is still flipped to negative polarity ) .

All drivers need to be working in the same ( + ) polarity.

See this image ( of the necessary test setup > this is what the combined-component curve looks like if the woofer offset is 2.5" ) ;

New crossover for my current speakers-curve-fitting-acoustic-offset-2-5in-calcs-png
Attached Images
File Type: png Curve-Fitting for Acoustic OffSet 2.5in calcs. C.png (42.4 KB, 67 views)

Last edited by EarlK; 9th December 2017 at 01:53 PM.
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