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Contributor I
September 19, 2025
Answered

System upgrade - Sub 3 or Sub 4 with Arc Ultra?

Hi!

My speakers system right now is Arc, 2xEra 300 and Sub gen 3. 

I’m want to buy Arc ultra, and i thinking it is worth to take Sub gen 4?

Someone know how it will be play with Arc ultra, 2xEra 300 and Sub gen 3 and Sub gen 4? Or better sell sub gen 3, and leave only sub gen 4?

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Mr. T
Mr. TAnswer
September 19, 2025

I don’t have a Sub 4, but by all accounts there is marginal difference in bass produced when comparing Sub (Gen3) and Sub 4.

The fact Sonos allows a dual Sub setup incorporating both Sub (Gen3) and Sub 4 further demonstrates that there is no dramatic sound difference between the two Sub versions, otherwise they wouldn’t allow it to be supported configuration.

A dual Sub setup can be beneficial as it can even out the bass response in a room. However, if you’re happy with the performance of your single Sub (Gen3) as it is, there’s no compelling reason to purchase a Sub 4. I certainly wouldn’t replace a Sub (Gen3) with a Sub 4 at present. I’d rather spend the funds placing speakers in other rooms.

4 replies

Mr. T
Mr. TAnswer
September 19, 2025

I don’t have a Sub 4, but by all accounts there is marginal difference in bass produced when comparing Sub (Gen3) and Sub 4.

The fact Sonos allows a dual Sub setup incorporating both Sub (Gen3) and Sub 4 further demonstrates that there is no dramatic sound difference between the two Sub versions, otherwise they wouldn’t allow it to be supported configuration.

A dual Sub setup can be beneficial as it can even out the bass response in a room. However, if you’re happy with the performance of your single Sub (Gen3) as it is, there’s no compelling reason to purchase a Sub 4. I certainly wouldn’t replace a Sub (Gen3) with a Sub 4 at present. I’d rather spend the funds placing speakers in other rooms.

ArctusikAuthor
Contributor I
September 19, 2025

Ok, thank you…

What about this problem?

 

Mr. T
September 19, 2025

Ok, thank you…

What about this problem?

 

Sonos have replied on that thread to say that particular issue is considered as resolved.

Stanley_4
Grand Maestro
September 19, 2025

Can't address the Sub 3, but I can't tell the difference in my Sub 2s and my Sub 4. I sure wouldn't replace any of the 2s with 4s unless it was required for something I really wanted. 

Got in a which Sub to buy,  a 3 or 4 and some good points were made for the 3 due to the lower cost.