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Rivera Hundred Duo Twelve Combo Amplifier  From Rivera

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Rivera Amps

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Manufacturer's Description from Rivera


Heavy in tone, light in weight, easy to use, and very portable, our R Series of all-tube combo amplifiers evolved from our M/S Pro Series combo amp. They are available in two sizes, with a 1-12" or 2-12" custom Celestion speaker configuration, in 30-watt and 55-watt (1-12" only) or 100-watt power (2-12" only). R Series amps feature our legendary pair of independent and differently voiced channels, with footswitchable boost on each, delivering four sounds at the tap of your toe. 

From British amp tones on Channel One, for those sultry crunch rhythms and leads, to the warm tweed or blackface American tones on channel two, the versatility to bring out the best in any style is there. Built-in Hammond 3-spring reverb provides a smooth and sweet fill, and a super-quiet active effects loop with level controls lets you utilize external effects quietly and allows you to mix in that extra spice you need for your individual style.

Rivera Amps

About Manufacturer

In August of 1976, Paul Rivera founded Rivera R&D in Southern California to provide for musicians and the music industry leading-edge design, development, and manufacturing of products based on the philosophy that you, our client, are the center of our attention. It has been our driving force, from our early work in the 1970s with the who's who of the studio world, to our consulting work for many of the leading amplifier manufacturers, to today's extensive line of professional products that we proudly hand-build in the USA. Rivera is a privately owned company. We do not have to answer to shareholders. We answer only to you. Thankfully, in these times when other makers have taken their production offshore, closed, or allowed their products to deteriorate in quality and tone, we have prospered. This again is because of you, our loyal clients. Our continuing dedication to using only the finest of components in robust designs stands the test of time. Purchasing one of our amplifiers is a long-term investment in quality. You will still be enjoying your Rivera product long after our competitors' products are no longer serviceable and have been discarded. Only Rivera builds an all-tube stereo combo amp, the S120 series. Only Rivera builds an all-tube acoustic guitar amp, the Sedona. Only Rivera had the foresight and innovation to launch our powered subwoofer systems over six years ago. Every product in our line is dedicated to serving players and is designed to meet their needs. Years ago Rivera R&D was famous for complete effects racks and systems for bands and solo artists like Toto, Van Halen, Lee Ritenour, and many others. We are proud to launch our new Routmeister effects switcher, distilled from our years of signal-processing experience. This one product solves the frustration that many players have faced for years in organizing and controlling their stage systems. As we have grown, we have expanded our capacity to manufacture absolute top-quality amplifiers. We are now unleashing our new entry-level Pubster and Clubster series of amplifiers, compact beauties that sport all the quality of our more expensive models, with enough features and stunning tone to please the pickiest of players. For those of you purchasing a Rivera for the first time, welcome to our family. For those of you already in the family, hello again, and we are happy to be of service to you once more.



High-gain input impedance: 1 Megohm
Low-gain input impedance: 33k ohms
Output impedance: 8 ohms
Line output impedance: 330 ohms minimum
Total harmonic distortion: 5% at rated power
Bandwidth: 50 Hz to 20kHz
Preamp tubes: Five 12AX7A
Output tubes: Four EL-34
Tube voltage: 430 volts DC
Output power: 100 watts RMS into 4 ohms
Operating voltage: 115 volts AC or 230 volts AC (export model), or 100 volts AC (Japan only)
Speakers: Two 12" Celestion G12T-85
Speaker impedance: 8 ohms
Speaker power handling: 85 watts
Reverb type: Accutronics 3-spring
Footswitch functions: Channel switching, boost for Channel 1, Ninja Boost
Height: 18"
Width: 26-1/2"
Depth: 9-3/4"
Weight: 80 lbs.
Cabinet material: Solid lumber-core plywood
Cabinet thickness: 3/4"
Baffleboard: 3/4"-thick medium-density fiberboard
Construction: Dadoed joints
Covering: 30-oz. vinyl
Cleaning of vinyl covering: Moist cloth, dishwashing liquid
Grillecloth: Fiberglass, fire-retardant cloth