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Customer Reviews

Jensen JA1B

Jensen JA1B JA Series compact mono subwoofer amplifier with digital signal processing — 595 watts RMS x 1 at 1 ohm

MFR # JA1B

5.0 out of 5 stars
4 reviews
View this product
Good amp for the price, nice features.

Brian from NORTH BRUNSWICK, NJ on 5/10/2025

Verified customer (What's this?)
Verified employee review (What's this?)

I connected this to a 4 ohm Kenwood 12" sub in a ported box. The sub is 300 watts RMS, and the amp can put out 290 watts @ 4 ohms, so it's not a bad pairing with the speaker. I would have preferred a higher wattage amp because "clipping" will burn out a sub faster than a little too much power, but this amp fit my budget. It sounds great! I really like the Bluetooth control from my phone. It allows me to adjust settings in the amp without installing a wired remote. A previous review said that the Jensen app doesn't work well with Android phones. It works fine on my Android phone.

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Cons:

Crutchfield response on

1 of 2 found this helpful

Mount Vernon

Jon from Mount Vernon, Indiana on 2/8/2024

Verified customer (What's this?)
Verified employee review (What's this?)

I love the DSP which allows me to tune the amp via my smartphone. This was important for me since the amp is located behind cargo panel in my Bronco- making it waterproof install.

Pros: DSP is amazing, bass boost very cool feature

Cons: Some sort of auto tune procedure would be great

Crutchfield response on
Customer review photo

1 of 1 found this helpful

Small Little Beast

Mario from Holcomb, KS on 5/18/2023

2001 Chevrolet Silverado 1500

Verified customer (What's this?)
Verified employee review (What's this?)

They say the best perfumes come in small containers! Well, this little amp packs a punch. I'm very impressed how how much power it pushes out! I don't listen to loud music, but making some adjustments to the head unit and the amp I was able to get the sound I was looking for. Not too disturbing base at low volume. I connected both my Subs in series instead of Parallel.

Pros:

Cons: The App does not work very well on Android, works ok on Apple.

Crutchfield response on

2 of 2 found this helpful

Jensen JA1B

Jeffrey from Wilton, IA on 4/29/2023

Verified customer (What's this?)
Verified employee review (What's this?)

I have gotten a few things from crutchfield over the years and always been satisfied with the service and the product. I had this in 4 days and I installed it but haven't quite got it figured out yet. The only way to adjust it is with your phone and I'm old school and I need to get caught up with modern technology. I haven't even got my phone figured out. I'm 62 and I like my bass so I will get it one way or another

Pros:

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Crutchfield response on

7 of 10 found this helpful

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