# Electrolytic for large values
**URL:** https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552
**Category:** General
**Tags:** passive-xover
**Created:** [April 14, 2026, 3:38am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552 "2026-04-14T03:38:30Z")
**Posts on this page:** 18
**Page:** 1
### Author:  [@Stearns250](https://discourse.midwestaudio.club/u/Stearns250)
#### Post date: [April 14, 2026, 3:38am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/1 "2026-04-14T03:38:30Z")
Just curious if anyone can hear a difference from electrolytic caps vs poly on say a 150uf going to a Midrange in a 3way crossover?
If there is a difference is it a huge one? 150uf capa are EXPENSIVE!.
Just looking for opinions really.
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### Author:  [@Dirk](https://discourse.midwestaudio.club/u/Dirk)
#### Post date: [April 14, 2026, 3:50am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/2 "2026-04-14T03:50:20Z")
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### Author:  [@Dirk](https://discourse.midwestaudio.club/u/Dirk)
#### Post date: [April 14, 2026, 3:59am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/3 "2026-04-14T03:59:10Z")
I do wonder, though, whether people’s opinions (or what they buy) has changed since the pre-COVID “good ol’ days”
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### Author:  [@Stearns250](https://discourse.midwestaudio.club/u/Stearns250)
#### Post date: [April 14, 2026, 4:00am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/4 "2026-04-14T04:00:18Z")
Im just looking at the price of large polys and can’t justify it. I have never heard the difference so curious to hear what others have to say.
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### Author:  [@a4eaudio](https://discourse.midwestaudio.club/u/a4eaudio)
#### Post date: [April 14, 2026, 4:02am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/5 "2026-04-14T04:02:11Z")
I don’t have an opinion on the NPE vs poly, but…one option… **JF Components** has capacitors for ridiculously low prices right now. If 3x 47UF in parallel (= 141uF) gets you close enough, 3 of them will cost you about $10.
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### Author:  [@Wolf](https://discourse.midwestaudio.club/u/Wolf)
#### Post date: [April 14, 2026, 8:05am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/6 "2026-04-14T08:05:51Z")
Ebay is your friend for large cheap poly caps.
JF Comp is a great option.
ApexJr has some good cap buys now and then too, a MKP-LM 50uF 600V poly for $4. Check both their radial and axial capacitor pages.
> **[Axial Capacitors](https://www.apexjr.com/capacitorA.html)**
Other than that, most 150uF poly caps are around $50 or more.
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### Author:  [@Eggguy](https://discourse.midwestaudio.club/u/Eggguy)
#### Post date: [April 14, 2026, 9:57am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/7 "2026-04-14T09:57:27Z")
The only reason that I would have an opinion on this is because I just recently tried it on my TV speakers with a 150 uF on the cheap but very nice sounding Dayton PC83’s and it was very obvious to me. I don’t know how to describe it except crap. The mid covers over four octaves so that is the majority of what I can hear from them so that probably made it more obvious.
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### Author:  [@jr-mac](https://discourse.midwestaudio.club/u/jr-mac)
#### Post date: [April 14, 2026, 12:28pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/8 "2026-04-14T12:28:09Z")
If 141 isn’t close enough, just add a 10uF in addition.
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### Author:  [@Ani](https://discourse.midwestaudio.club/u/Ani)
#### Post date: [April 14, 2026, 1:52pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/9 "2026-04-14T13:52:13Z")
I need 750 uf or somewhere in that neighbourhood. Just ordered some electrolytic, but will switch to poly if reasonable options are around. This is for a cap assisted enclosure. i’ll start a separate thread for it. But looking for sources of big caps. Does it matter what type of poly?
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### Author:  [@Wolf](https://discourse.midwestaudio.club/u/Wolf)
#### Post date: [April 14, 2026, 2:29pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/10 "2026-04-14T14:29:34Z")
If you want that big, you either parallel smaller values, back to back polarized can caps, or get an Electronic Concepts UL30 model on ebay for the most cost effective solution.
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### Author:  [@impious](https://discourse.midwestaudio.club/u/impious)
#### Post date: [April 14, 2026, 4:26pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/11 "2026-04-14T16:26:51Z")
This was going to be my suggestion. I’m probably going to load up on some caps from him as those prices are insanely cheap
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### Author:  [@PWRRYD](https://discourse.midwestaudio.club/u/PWRRYD)
#### Post date: [April 14, 2026, 7:22pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/12 "2026-04-14T19:22:39Z")
I’m going to grab a bunch of those 47 uF poly’s from Brad too. They come in handy for some woofer shunts and LCR comps as well.
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### Author:  [@Stearns250](https://discourse.midwestaudio.club/u/Stearns250)
#### Post date: [April 14, 2026, 7:26pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/13 "2026-04-14T19:26:46Z")
I better hurry and order lol
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### Author:  [@Stearns250](https://discourse.midwestaudio.club/u/Stearns250)
#### Post date: [April 14, 2026, 11:43pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/14 "2026-04-14T23:43:08Z")
I ordered the 50uf polys from apex, super nice guy. I intend to do a comparison with both the electrolytic and the 3 polys in parallel to see if I hear a difference. I will report back my findings. 🙂
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### Author:  [@Wolf](https://discourse.midwestaudio.club/u/Wolf)
#### Post date: [April 14, 2026, 11:58pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/15 "2026-04-14T23:58:56Z")
I’ve bought quite a bit from Steve Slater at ApexJr. over the years, great prices and class act.
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### Author:  [@jr-mac](https://discourse.midwestaudio.club/u/jr-mac)
#### Post date: [April 15, 2026, 12:27pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/16 "2026-04-15T12:27:20Z")
I’ll second recommendation for working with Steve. Always answers his phone. Always fair pricing.
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### Author:  [@ron\_e](https://discourse.midwestaudio.club/u/ron_e)
#### Post date: [April 15, 2026, 8:30pm UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/17 "2026-04-15T20:30:45Z")
I’ve been buying from ApexJr since 5 1/4" floppy drives were a thing.
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### Author:  [@Stearns250](https://discourse.midwestaudio.club/u/Stearns250)
#### Post date: [April 16, 2026, 3:28am UTC](https://discourse.midwestaudio.club/t/electrolytic-for-large-values/552/18 "2026-04-16T03:28:06Z")
Wow, that’s a long time