This is my updated review for this amp.
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Rivera amps produces some great amps - this is the Knucklehead Reverb Combo that puts out impressive volume through it's Eminence Swamp Thang speaker.
55watts of luscious EL-34 Tube power Specifications:
• 2 Independent Channels powered by El-34's & 5 12AX7 Tubes
• 3 band passive interactive tone controls on each channel
• Most high gain lead channel they have ever offered, sustain for years, packed with thunderous bottom end-totally controllable with their new and patent pending Foundation control
• Clean Channel with massive headroom and dynamic range
• New totally adjustable serial effects loop with hard wire bypass and footswitchable
• New assignable and footswitchable 6 spring Reverb (head version features 3 spring)
• Rugged Rivera construction, with military and audiophile grade components, oversize transformers, and most of all, built to last
• 4 function footswitch included
![](https://i.ytimg.com/vi/EDE_0pcciso/maxresdefault.jpg)