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Knucklehead® Reverb 55 and Knucklehead 100 Amp Tops • Rivera excels again!  With the development of a new 3 Channel Tri-Tone™ All-Tube circuit architecture, a player is given a range of incredible sounds.  From shimmering and rich clean tones, to screaming high gain leads; impeccable note definition along with massive bottom end crunch tones can be reached. 3 Preamp Channels, powered with 6 12AX7’s, work to establish each with distinctive voicing and levels.  Long Pan Hammond Spring Reverb containing dual reverb controls, allows adjustment of different reverb levels.  Footswitchable Boosts on all channels are featured, as well as an Effects Loop Bypass. Lead/Crunch Channels include 3 bands of interactive passive tone controls.

Rivera Knucklehead Reverb Pro User Prices :
KR-100 $2499.00 • KR-55 $2299.00
FS-4 Head Master included

 
More Features • A Pull Scoop switch exists to deepen the midrange notch, and a Pull Bottom works for adding gobs of fatness on the low strings.  For the Rhythm and Blues channel, 3 bands of equalization along with a Pull Bright Switch, and a Midrange Pull Notch switch, give a choice of British/Tweed or American Blackface tones.  6 footswitchable and distinct tones are easily accessible.  Footswitchable functions are actuated with soft-touch momentary contact switches (especially quiet for studio recordings).  Like all Rivera amps, the LED indicators on the front or rear panels correspond with the LED indicators on the Footswitch.  Focus and Presence controls for the final equalization of the EL-34 (55 Watt has 2 EL-34’s, and the 100 Watt has 4 EL-34’s) power amp section round out the variables.  6L6GC’s may be installed by just adjusting the bias (an internal adjustment).  Power and Standby switches are on the front panel as well.
Rear panel features include: Series/Parallel Effects Loop with Level and Blend controls, equalized Recording Output, subwoofer Output (for hooking up to powered Los Lobottom® Sub 1 or Sub 2 subwoofers), an Impedance Selector with two speaker jacks, High/Low Power Switch, and a Vintage/Triode switch (allows for 100/50/25/12 Watt Output Power selection).  A 6 function (FS-4) footswitch is included.
Cabinet Material: American Maple Solid Core Plywood.  Cabinet covering: Black Tolex® Vinyl.  Front Grille: Bright Aluminum.  Cabinet Hardware: Chrome plated metal corners, black reinforced strap handle. 
Dimensions: 26.75"x 11" x 10" 
Weight: 57 Pounds (KR-55), 62 Pounds (KR-100). 
 
     

Head Master™ MIDI Controller
The Rivera Head Master is a programmable, foot operated MIDI controller. Although it was designed to work with the Knucklehead Reverb, it is also a general purpose MIDI controller.
• 30 Stored Programs, arranged as 5 banks of 6 buttons
• Controls up to 16 MIDI devices
• Sends MIDI Program Change messages
• Non-Volatile Memory
• Programmable using onboard buttons
• Three digit High Brightness LED displays
• Three SPDT Relays for control of non-MIDI amps
• Powered directly from Knucklehead, or from external Power Supply
• Aux. 12VDC Regulated Output for powering stompboxes
• Included with Knucklehead Reverb, or available separately

 
" The Rivera Knucklehead Reverb blazes a new trail for high-gain heads with a remarkable clean channel, loads of features, an intelligent user interface
and MIDI control. You've got a massive
tone delivery system with an unmatched sonic footprint."

Guitar World - Feb. 2003

 
" A great-sounding professional amplifier that is loaded with enough sonic options to satisfy even the most inveterate tone-tweaker, the Knucklehead Reverb is also powerful enough to hold its own in nearly any performance situation. In addition, its MIDI capabilities will be welcomed by users with sophisticated rigs who want the convenience of having several preset sounds without sacrificing genuine tube tone."
GUITAR PLAYER • Feb. 2003
 
" Yes, it’s a very expensive purchase but the Knucklehead really delivers. By
comparison, some other amps in this price bracket are much harder to justify.
Every feature is onboard for a specific reason and adds something. What we’re really trying to say is the Knucklehead Reverb is one of the world’s ultimate guitar amplifiers; once you have one, chances are you will want to hang on to it for a very long time."

Guitarist UK • June 2003