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Multi-Way Conventional loudspeakers with crossovers

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Old 30th June 2020, 07:07 PM   #71
diyiggy is offline diyiggy
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OK : Medium-woofer High-Pass when crossed in the snap <200hz area ?


Expensive, sure. But there is maybe a trade off ! many have testimonials on the good enough Jantzen Cross cap over the usual Solens. for that job !


You can see in the thread I need a lot uf for a bass to mid high pass. Sounds good with NPE smooth foils : no brainers really. But voila, as it's a your personal main system you can be atracted by the tweak better option fever ! 250 uF of MKP Jantzen Cross cap is a real pain vs NPE because both the price and the size of it. But why noy ? Just less bad steaks at the end of te month.


Don't get me wrong, I really think that future, well... nowadays, better active for the First XO then passive for the low pass mid and high pass tweeter - in order to enjoy some really good dacs that make all the difference today vs not sota middle priced full active solution (DBX, MiniDSP ; god enough for the bass only imho). You can really enjoy a very good sound from today dacs vs older cd players (I believe I tweaked between 30 to 50 units before going to dac and streamers), and I talk about Red-Book... so no nerd talking !


Edit, if you wisch, I can copy some Intertechnik about the difference between usual MKTs and NPE at different frequencies for your curiosity. Not want to pollute your thread.
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Old 30th June 2020, 07:10 PM   #72
oldspkrguy is offline oldspkrguy  United States
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https://www.mouser.com/datasheet/2/2...5C-1104325.pdf

Non-stock at Mouser; just starting to look though
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Old 30th June 2020, 07:15 PM   #73
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well... a good one for amps. Traditional with Sikorels' in amp caps choice. But we are talking bipolar for our speaker, no ? AC vs DC ?
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Old 30th June 2020, 07:51 PM   #74
oldspkrguy is offline oldspkrguy  United States
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You do it "back to back"...connect two in series so the two negative terminals are connected together. Then; the two positive terminals are connected between the amplifier and speaker. Doing this makes it a non-polarized capacitor. Say I needed 340 uF; I would use two 680 uF in series; this gives me 340 uF and doubles the voltage of just one capacitor. This is why I like the Evox-Rifa PEH 169 series in particular because of lower ESR and ESL, etc. Obviously; ESR is very important here since we are putting two capacitors in series.

I said earlier it probably wouldn't work very well to have two very different drivers wired in series with each other. Just as a quick experiment; I might try it anyway. The MW16P Satori dips almost as low as 3.5 Ohms and the SB29 looks like it dips as low as 5 Ohms. Of course; another problem is I don't know the true impedance that is influenced by being in the box verses free air so calculating capacitor and inductor value would mean I should learn how to do the impedance measurement in REW.

If I could successfully connect these two woofers in series; if the sound quality is OK; I could leave it this way since ultimately a new 10 inch woofer will replace the Satori MW16 and SB29 woofer both. It may be one or two months; then I could buy new woofers. Because of the COVID-19 here; both my Daughter and Girlfriend are out of work so of course; I help loan or give them money every month so I need to be on a tight budget...
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Old 30th June 2020, 08:11 PM   #75
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I know the trick but not the same Z at the end (esr) and also inductance (assuming the voice coil is zero ohms; lol)
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Old 30th June 2020, 08:30 PM   #76
oldspkrguy is offline oldspkrguy  United States
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yep, well now I have the two woofers in series; not great but maybe good enough for now!?? The bigger SB 29 seems to be the louder of the two even though it has a lower sensitivity than the Satori. It does have a higher impedance. So we have a very different mixed mis-match of sensitivities; impedances; VC inductance; etc. not to mention maximum power abilities; box styles; cone area, etc... I'd rather not spend over $100+++ for just a temporary crossover "fix"; maybe I will get use to the combined sound in series; just now starting; only heard one song so far this way...
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Old 30th June 2020, 08:37 PM   #77
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But the list given, one that is well regarded is the SB 34 : bigger, perhaps a perfect mate for the the Satori 7 between 80/300 hz XO ? Measured by a fello here that measure a lot of speakers ! I will stay on the Faital 15PR400, though no one measured the distorsions but a million of god testimonials about it (some bass players use it FR vs te usual EV !)
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Old 30th June 2020, 08:46 PM   #78
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Some people also said it is like the SB29; not as good in mid and upper bass. BUT, too big for my box anyway; I want to use my 33 liter boxes as is. The biggest reason is this room isn't large enough for a much bigger box and the placing is also very limited as well.

Two 6 or 7 inch, one 8 or 9 or 10 or maybe 11 inch is about the maximum limit here...

Thanks!
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Old 30th June 2020, 10:54 PM   #79
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I had heard any of them the but this guy is inspiring : Zaph|Audio - SB12.3 3-Way Tower


Well, sealed ! Sure not 33 liters.


Edit : I had not noticed : so you made a 3.5 ways experiment finally ?
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Old 30th June 2020, 11:48 PM   #80
oldspkrguy is offline oldspkrguy  United States
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Quote:
Originally Posted by diyiggy View Post
I had heard any of them the but this guy is inspiring : Zaph|Audio - SB12.3 3-Way Tower


Well, sealed ! Sure not 33 liters.


Edit : I had not noticed : so you made a 3.5 ways experiment finally ?
Work in progress; I have ALWAYS had the 2 mids and tweeter and sub; just adding a woofer. Zaph does know what he's talking about; I think the NE 265 will be my first choice because it fits my box well and has a better mid and upper bass than the SB29 and many others that I have discovered thus far anyway...
 

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