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Budget Subwoofer amp

lowfat

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Have had an old Padadigm SB-90 subwoofer unused for close to 20 years. Don't have neighbours any more so I thought I'd hook it up again. Problem is, its passive. I'm driving it off my NAD D 3020. Has a few issues tho. I have no control over sub volume. It is a getting a whopping 60 WRMS. It's low pass filter has a very shallow roll off, maybe 6dB.

So I'm looking at some budget amplifiers for it. ~150WRMS @ 4ohm and an active low pass filter are required. IR for a remote would be really beneficial, but not required. Prefer Class D.

Not having a lot of luck looking. Found this 'Fosi Audio'. Never heard of them tho. Anyone used anything from them? https://www.amazon.ca/Subwoofer-Aud...3DQHYF4XTAJ&psc=1&refRID=B558QA4G73DQHYF4XTAJ

I'd even be ok w/ a DIY kit. But unfortunately haven't found any boards that have an adjustable low pass filter.
 

JD

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Why not one of those plate amplifiers and cut the hole bigger in the sub to fit it inside? Or you're not wanting to cut/modify the sub?
 

lowfat

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Why not one of those plate amplifiers and cut the hole bigger in the sub to fit it inside? Or you're not wanting to cut/modify the sub?
I don't want to modify the volume of the box as that will affect sound output. Especially since I believe this is a 6th order band-pass enclosure. They need to be pretty precise in volume / port size.
 

lowfat

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Got the amp today. Shipped from USA, shipped in just the manufacturers box. Next to no packing and it wasn't even tapped shut. :cautious:

However everything was in the box. Ghetto rigged it up now to test and what a massive improvement. Tomorrow I'll get it hooked up to Home Assistant so it will turn on / off automatically when the NAD D 3020 turns on.
 

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