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TPA3138D2: How to modify the TPA3138D2 EVM to achieve 10W, 1% THD+N under 12V and 6 ohm speaker condition ?

Part Number: TPA3138D2

Hi 

We are testing TPA3138D2 EVM with it original circuit output filter is Ferrite Bead and see 2.4% THD+N at  12V and 6 ohm speaker condition  (BTL) . 

The TPA3138D2 datasheet fig. 5 show 12V and 6 ohm speaker it can achieve 10W 1% THD+N. 

1. May i check datasheet fig.5 test circuit. what is the L and C value for the output filter ? 

2. Any idea higher THD+N % when using Ferrite Bead at the output ? 

Below attached our EVM test result for reference!