The company's chief executive Patrick Spence has written an open letter to customers following a backlash over the plan - which will be put into place from May - as he sought to clarify the situation and offered his "apologies".
In a lengthy statement, he wrote: "First, rest assured that come May, when we end new software updates for our legacy products, they will continue to work as they do today.
"We are not bricking them, we are not forcing them into obsolescence, and we are not taking anything away. Many of you have invested heavily in your Sonos systems, and we intend to honour that investment for as long as possible.
"While legacy Sonos products won't get new software features, we pledge to keep them updated with bug fixes and security patches for as long as possible."
The firm's boss also revealed the team were looking at ways of allowing "legacy products" to work alongside newer devices.
Spence continued: "Secondly, we heard you on the issue of legacy products and modern products not being able to coexist in your home.
"We are working on a way to split your system so that modern products work together and get the latest features, while legacy products work together and remain in their current state.
"We're finalising details on this plan and will share more in the coming weeks."
This week, the company advised users that there are two options, with the first being to simply continue using the products in the knowledge you won't get any software updates or new features.
The second option is to "trade up to a new Sono product with a 30% credit for each legacy product you replace".