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5.1 Surround Sound test files various formats AAC,AC3,MP4,DTS WAV : Sir Round : Free Download, Borrow, and Streaming : Internet Archive
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PYLE PT694BT - Hi-Fi Bluetooth Home Theater Receiver - 5.2-Ch Surround Sound Stereo Amplifier System with 4K Ultra HD Support, MP3/USB/AM/FM Radio (1000 Watt MAX) - Walmart.com
![Measured frequency response of 5.1 Ch. Surround sound system for test... | Download Scientific Diagram Measured frequency response of 5.1 Ch. Surround sound system for test... | Download Scientific Diagram](https://www.researchgate.net/profile/Ninad-Mehendale/publication/319874353/figure/fig3/AS:539910747508736@1505736161797/Fig-3-Measured-frequency-response-of-51-Ch-Surround-sound-system-for-test-sound-Time.png)