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forum threadZorba1446 posted Mar 05, 2026 10:22 PM
forum threadZorba1446 posted Mar 05, 2026 10:22 PM

Fosi ZP3 pre-amp with XLR/RCA and subwoofer outputs with High Pass Filter, perfect for ACTIVE speakers $161.31

$161

$596

72% off
AliExpress
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The List Price above is from the vendor and thus optimistic, but Amazon usually carries this for closer to $200 so this is still a nice deal if you can wait around 9 days for it to arrive.

Full details from manufacturer website: https://fosiaudio.com/pages/zp3-preamp​ [fosiaudio.com]

This is a relatively low-cost solution for someone who already has a pair of powered/active speakers (or passive speakers with external amp) and wants to add up to 3 additional sources, plus have a bass-managed subwoofer featuring an ingenious high pass filter controls on the bottom.

Next step up would be the Wiim Ultra pre-amp which does offer a ton of both wired and wireless connectivity options, regular price around $330 on Amazon.

https://www.aliexpress.us/item/32...6428.html?
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About the Poster
The List Price above is from the vendor and thus optimistic, but Amazon usually carries this for closer to $200 so this is still a nice deal if you can wait around 9 days for it to arrive.

Full details from manufacturer website: https://fosiaudio.com/pages/zp3-preamp​ [fosiaudio.com]

This is a relatively low-cost solution for someone who already has a pair of powered/active speakers (or passive speakers with external amp) and wants to add up to 3 additional sources, plus have a bass-managed subwoofer featuring an ingenious high pass filter controls on the bottom.

Next step up would be the Wiim Ultra pre-amp which does offer a ton of both wired and wireless connectivity options, regular price around $330 on Amazon.

https://www.aliexpress.us/item/32...6428.html?

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Mar 05, 2026 10:45 PM
740 Posts
Joined Mar 2010
searsyMar 05, 2026 10:45 PM
740 Posts
that's a low pass filter on the sub outputs right?
Mar 06, 2026 12:22 AM
97 Posts
Joined Feb 2025
SmilingRiver528Mar 06, 2026 12:22 AM
97 Posts
Quote from searsy :
that's a low pass filter on the sub outputs right?
I dont see a low pass mentioned. The high pass can be set to 80hz or 120hz. The sub output is full range so you'd need a sub with lpf control
Mar 06, 2026 01:12 AM
2,262 Posts
Joined Aug 2010
Backhome77Mar 06, 2026 01:12 AM
2,262 Posts
Quote from searsy :
that's a low pass filter on the sub outputs right?
No. Most subs already have a low pass filter. This gives you the option to put a high pass filter on your mains, which can make it easier to dial in a sub, and is a huge deal if you're using smaller bookshelves or other non full-range speakers that can really struggle with low frequencies.
1
Mar 06, 2026 04:22 AM
573 Posts
Joined Apr 2023
DaMexicaMar 06, 2026 04:22 AM
573 Posts
I was thinking this instead?
https://a.co/d/0gT9zd89
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Mar 06, 2026 04:13 PM
699 Posts
Joined Sep 2018
Zorba1446Mar 06, 2026 04:13 PM
Original Poster
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699 Posts
Quote from DaMexica :
I was thinking this instead?
https://a.co/d/0gT9zd89
At that $299 pricepoint if you want to pay full price for quick shipping from Amazon not wait for Ali Express slow shipping, you might as well spend an extra $30 for the Wiim Ultra pre-amp which has many more features and proper bass management (high pass filter) which is huge if running small bookshelf speakers with an active subwoofer.
Original Poster
Pro
Mar 06, 2026 04:15 PM
699 Posts
Joined Sep 2018
Zorba1446Mar 06, 2026 04:15 PM
Original Poster
Pro
699 Posts
Quote from searsy :
that's a low pass filter on the sub outputs right?
I honestly don't know of any subs that do not have their own LPF. Even $100 Jamo or $200 Edifier T5 have LPF.

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