The Samsung HW-S61D soundbar is well-suited to be used as a standalone audio solution, even with the TV speakers turned off. Here are some key features that support this use:

## All-in-One Design
The soundbar has a compact design with a 5-channel setup, including built-in speakers and passive radiators, which provide powerful and rich sound without the need for additional components.

## Built-in Center Speaker
It features a built-in center speaker that enhances human voices, delivering clear and crisp dialogue, which is particularly beneficial for watching movies and TV shows.

## Wireless Dolby Atmos
The soundbar supports wireless Dolby Atmos, providing an immersive 3D audio experience without the need for HDMI cables, which can enhance your overall audio experience.

## SpaceFit Sound Pro
This feature calibrates the sound to your room's environment, ensuring optimized audio performance tailored to your space.

## Adaptive Sound and Active Voice Amplifier (AVA)
These features automatically optimize the sound based on the content and volume, and amplify voices to ensure clear dialogue even in noisy environments.

Given these features, the HW-S61D soundbar can effectively replace your TV speakers and provide a high-quality audio experience on its own.