+The **5f3** refers to a celebrated electric [Amplifier](/wiki/Amplifier) circuit, notably found in vintage Fender Deluxe models. Renowned for its raw, dynamic [Tube Sound](/wiki/Tube_Sound), it remains a benchmark in instrument amplification.
+## See also
+- [Fender](/wiki/Fender)
+- [Vacuum Tube](/wiki/Vacuum_Tube)
+- [Circuit](/wiki/Circuit)
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