EARLY POWER-AMP KICK.ARTICULATE AND SUSTAINED CLEAN TONE.HARMONICALLY RICH AND ROUNDED, SINGING OVERDRIVE. At the heart of Royaltone lies a clear, detailed, and harmonically rich sound, delivering a beautifully balanced tone. Royaltone's secret is that the power and preamp sections are always “in touch,” even at low volume settings. When your guitar signal hits the power section early, it results in greater sustain and harmonic richness, letting you enjoy every note you play. Because of this characteristic, Royaltone brings out every detail and nuance in the notes you play, resulting in a better listening experience for the audience as well. The overdrive channel organically engages with your playing and touch. Even at high gain, the response remains firmly under your control. It still follows your touch quickly and dynamically, without changing the tonal identity established in the preamp. VOLUME, OVERDRIVE, AND BOOST THREE CONTROLS. A COMPLETE GAIN STRUCTURE. The character of Royaltone’s overdrive channel is shaped by the interaction between the Volume, Overdrive, and Boost controls. CLEAN CHANNEL Royaltone’s clean channel combines American-style openness with the harmonic depth, piano-like note definition, sustain, and three-dimensional response associated with refined boutique amplifiers. Its sensitive input allows the clean tone to move naturally from clean headroom into an early power-amp kick and edge-of-breakup response. The transition is gradual and musical: lighter playing remains articulate, while a stronger attack introduces warmth, harmonic movement, and controlled tube compression. The result is a sustained clean voice that feels full without becoming static or losing sensitivity to your touch. It also provides a highly responsive foundation for pedals while preserving the individual character of different guitars and pickup types. OVERDRIVE CHANNEL A ROUNDED VOICE WITH ITS OWN HARMONIC SIGNATURE. Royaltone’s overdrive channel was developed around a carefully selected harmonic balance. The circuit was carefully voiced to suppress unwanted, abrasive overtones, leaving a warm, rounded overdrive voice that works equally well with single-coil and humbucking pickups. The harmonic structure remains complex without becoming harsh, congested, or excessively compressed. Even as the gain rises, pick definition, the ability to clean up from the guitar’s volume control, and the fundamental character of the instrument remain intact. The circuit layout was also optimized for exceptionally low noise and stable operation, helping Royaltone remain composed in real-world home, studio, and stage environments. WARM. ROUNDED. RESPONSIVE. VOLUME The Volume control sets the level of the clean channel while also determining how strongly the signal drives the overdrive section. Raising the Volume increases the signal level feeding the overdrive circuit, directly influencing its gain structure and response. OVERDRIVE Controls the amount of additional gain and saturation produced by the overdrive channel. Lower settings introduce light breakup and dynamic crunch, while higher settings create a denser, rounder voice with greater harmonic complexity and sustain. BOOST Sets the output level of the overdrive channel. Use it to balance the clean and overdrive levels, or to create a deliberate volume increase when switching to the overdrive channel for lead playing. Because the clean and overdrive sections are closely connected, the EQ and clean-channel foundation you establish continue to shape the character of the overdrive channel. ONE EQ FOR BOTH CHANNELS CHANGE THE GAIN. KEEP YOUR TONAL FOUNDATION. The clean and overdrive channels share the same Treble, Middle, Bass, Presence, and Mid-Range controls. Switching from clean to overdrive does not replace your EQ with an unrelated channel voice. The frequency balance established on the clean channel remains the tonal foundation of the overdrive sound. The EQ foundation remains unchanged, while the Overdrive and Boost controls determine the gain structure and output level of the overdrive channel. Channel switching is immediate, with no audible interruption or distracting switching noise. TONE CONTROLS SHAPE THE COMPLETE AMPLIFIER. TREBLE Controls the upper-frequency content while revealing pick detail, openness, and upper harmonics. A carefully selected silver mica capacitor helps the Treble response remain refined and musical. This helps avoid a raw or abrasive top end while producing a clear, defined treble range that sits naturally within the sound of the guitar. Its interaction with the Middle control also allows the upper-mid harmonic structure to be shaped with precision. MIDDLE Controls the core midrange voice of both channels. Lower settings help create broader, more American-style clean tones. Higher settings move the amplifier toward a more vocal, forward, and British-leaning response. BASS Provides a broad and useful low-frequency range. Raise it for greater depth and body, or reduce it to keep the response tight and controlled at higher gain settings. Its wide adjustment range allows Royaltone to adapt to different guitars, pickups, rooms, and playing styles. PRESENCE Shapes the upper-frequency response of the power amplifier. Higher settings produce a more open and immediate response with a distinct British chime. Lower settings soften the power-stage attack without reducing the usefulness of the main Treble control. MID-RANGE Provides the final adjustment to the amplifier’s upper-mid response and becomes particularly effective when the power stage is being driven at higher levels. Turn it counterclockwise to reduce high-mid content and create a more scooped response. At its fully clockwise position, the control becomes effectively neutral, leaving the natural midrange established by the Treble, Middle, and Bass network essentially unaffected. This makes Mid-Range a highly effective final adjustment for matching the amplifier to a musical style, guitar, stage, or recording environment. TREBLE & MID RESPONSE FAT Engage the Fat switch to add fullness, weight, and body. It is particularly useful when a guitar, pickup, or playing situation calls for a broader and more substantial response. BRIGHT / NONE / TIGHT The three-position voicing switch adjusts the amplifier’s treble response to suit different playing styles and pickup types. Tight is brighter than None, while Bright provides the strongest treble emphasis. BRIGHT Provides the greatest increase in treble response for maximum brightness, openness, and upper-frequency detail. NONE Leaves the voicing neutral, allowing Royaltone’s natural frequency balance to come through unchanged. TIGHT Increases the treble response for greater clarity, definition, and presence without reaching the stronger emphasis of the Bright setting. MASTER VOLUME Royaltone uses a Lar-Mar Post Phase Inverter Master Volume design. With the Master control fully open, it has minimal influence on the circuit, allowing the amplifier to operate with its natural full-power response. Turning it down reduces the signal reaching the power tubes and controls the final volume of both the clean and overdrive channels. This allows the overall level to be reduced while preserving much of the amplifier’s frequency balance, harmonic character, and touch-sensitive response. HALF WATT MODE DRIVE THE POWER STAGE. CONTROL THE ROOM. The front-panel Half Watt switch reduces the power delivered to the speaker, allowing the power stage to be driven harder at a lower overall output level. With 6V6 power tubes, output is reduced from 22 watts to approximately 11 watts. With EL34 tubes, output is reduced from approximately 30–35 watts to approximately 15–17.5 watts. The Half Watt circuit is designed to remain highly transparent. Because it lowers the available headroom, stronger power-stage compression and saturation may become more noticeable when the amplifier is driven. Used together, Half Watt mode and the Master Volume provide a wide and practical range of volume control for recording, rehearsals, smaller stages, and home use. CHOOSE YOUR POWER TUBES TWO POWER-TUBE VOICES. ONE ROYALTONE IDENTITY. Royaltone can be ordered with a matched pair of JJ 6V6 or JJ EL34 power tubes. The amplifier is delivered fully tested and correctly biased for the selected tube type. 6V6 — 22 WATTS Lower headroom, earlier power-stage compression, and a softer transition into breakup. The response leans toward an American-style character, with a rounded attack and a more relaxed feel when the power section is pushed. EL34 — APPROXIMATELY 30–35 WATTS Greater headroom, a firmer low-frequency response, and a more immediate, open presentation. Its slightly more forward upper-mid character gives the amplifier a subtle British emphasis and a broader, more expansive sense of scale. Whichever power-tube configuration you choose, Royaltone’s essential clean and overdrive identity remains intact. ALL-JJ TUBE COMPLEMENT CONSISTENCY FROM THE FIRST GAIN STAGE TO THE POWER SECTION. Royaltone is equipped exclusively with JJ Electronic tubes. PREAMP AND PHASE INVERTER 4 × JJ 12AX7 POWER TUBES Matched pair of JJ 6V6 or JJ EL34 The output section uses a push-pull Class AB architecture with fixed bias and solid-state rectification. This architecture contributes to a fast, controlled response, firm low-frequency handling, and stable operation, while supporting the wide dynamic range of both the clean and overdrive channels. BUFFERED FX LOOP MIX YOUR EFFECTS. KEEP YOUR CORE TONE. Royaltone features a highly transparent buffered FX loop developed specifically for the amplifier. Its Send and Return connections support standard guitar pedals as well as line-level rack effects. Delays, chorus pedals, modulation effects, and other processors can therefore be integrated while preserving the amplifier’s core tone and gain character. SERIAL MODE Places the connected effect directly in the signal path for conventional FX-loop operation. PARALLEL MODE Preserves the amplifier’s dry signal while blending in the processed signal. In Parallel mode, the Return control adjusts the level of the processed signal blended with the dry signal. The loop uses internally normalled jacks, so no patch cable is required when nothing is connected. With no external effect attached, the Send and Return controls can also be used to create a footswitchable increase in overall volume. FX-loop switching is designed to operate with no audible interruption or distracting switching noise. FOOTSWITCHABLE CONTROL TWO SWITCHES. COMPLETE FOOT CONTROL. The supplied two-button footswitch controls: CLEAN / OVERDRIVE — Channel selection FX LOOP ON / OFF — FX Loop switching Both functions are designed to switch with no audible interruption or distracting switching noise. The footswitch is included with the amplifier. The connection cable is not included. A standard 6.35 mm TRS-to-TRS stereo cable is required. BIAS AND POWER-TUBE SERVICE DESIGNED FOR PROFESSIONAL SERVICING. Rear-panel bias test points and an externally accessible bias-adjustment shaft allow the amplifier to be measured and adjusted without opening the chassis. These facilities are intended exclusively for qualified technicians. Tube amplifiers contain potentially lethal voltages, even after they have been switched off. Changing between 6V6 and EL34 power tubes requires the bias to be checked and correctly adjusted. Power-tube replacement, measurement, and bias adjustment must therefore be performed by an experienced and qualified amplifier technician. Merlin Musical Electronics provides bias and tube-service support for Merlin amplifiers. Damage or malfunction resulting from incorrect tube installation, improper bias adjustment, or unauthorized servicing is not covered by the warranty. MERLIN SPECIAL VOICED SPEAKER VOICED FOR ROYALTONE. CHOSEN FOR THE COMPLETE SOUND. The standard Royaltone configuration includes a 12-inch, 8-ohm Merlin Special Voiced Speaker selected to complement the amplifier’s clean headroom, rounded overdrive character, and dynamic power-stage response. SPEAKER SPECIFICATIONS Size: 12 inch Impedance: 8 ohms Nominal power handling: 100 W Maximum power handling: 200 W Sensitivity: 98 dB Frequency range: 48.6 Hz–6,000 Hz Magnet type: Ferrite CABINET DESIGN FOR THE ROOM. FOR THE STAGE. Royaltone’s semi-open-back cabinet allows the amplifier to project naturally into the room while maintaining a full and dimensional response. Its carefully finished cabinet, selected colors, distinctive controls, and refined visual balance give Royaltone a presence that belongs equally well in a studio, on a stage, or in a carefully designed living space. It is not merely equipment placed in a room. It becomes part of the room. DIMENSIONS 47 × 49 × 26.5 cm — W × H × D Height includes the rubber feet and carrying handle. WEIGHT Approximately 20 kg INCLUDED IN THE BOX Royaltone Amplifier Two-button footswitch Power cable Footswitch connection cable is not included. ORDERING INFORMATION CONFIGURED FOR YOUR REGION. BUILT FOR YOUR SOUND. Configure your Royaltone when ordering: POWER TUBES JJ 6V6 JJ EL34 SPEAKER Merlin Special Voiced Speaker — Standard Celestion G12-65 — Add $205 USD MAINS VOLTAGE 120 V 220–240 V HEAR ROYALTONE FROM DETAILED CLEANS TO SINGING OVERDRIVE. Explore Royaltone’s clean tones, overdrive character, dynamics, and response through performance videos and sound demonstrations. WATCH THE ROYALTONE PLAYLIST LIFETIME SERVICE PROGRAM Royaltone includes a one-year limited warranty covering manufacturing and material defects, including parts and labor. Vacuum tubes are covered separately for three months. After the warranty period, the original owner continues to receive lifetime service support from Merlin Musical Electronics at a preferential service rate. Replacement parts and shipping costs are charged separately when required. Proof of purchase and an intact, readable serial number are required for warranty and lifetime service support. Normal wear, cosmetic damage, accidental damage, misuse, neglect, liquid damage, operation at an incorrect mains voltage, unauthorized modification or servicing, altered or removed serial numbers, incorrect tube installation, and improper bias adjustment are not covered by the warranty. 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VOLUME The Volume control sets the level of the clean channel while also determining how strongly the signal drives the overdrive section. Raising the Volume increases the signal level feeding the overdrive circuit, directly influencing its gain structure and response.
OVERDRIVE Controls the amount of additional gain and saturation produced by the overdrive channel. Lower settings introduce light breakup and dynamic crunch, while higher settings create a denser, rounder voice with greater harmonic complexity and sustain.
BOOST Sets the output level of the overdrive channel. Use it to balance the clean and overdrive levels, or to create a deliberate volume increase when switching to the overdrive channel for lead playing.
TREBLE Controls the upper-frequency content while revealing pick detail, openness, and upper harmonics. A carefully selected silver mica capacitor helps the Treble response remain refined and musical. This helps avoid a raw or abrasive top end while producing a clear, defined treble range that sits naturally within the sound of the guitar. Its interaction with the Middle control also allows the upper-mid harmonic structure to be shaped with precision.
MIDDLE Controls the core midrange voice of both channels. Lower settings help create broader, more American-style clean tones. Higher settings move the amplifier toward a more vocal, forward, and British-leaning response.
BASS Provides a broad and useful low-frequency range. Raise it for greater depth and body, or reduce it to keep the response tight and controlled at higher gain settings. Its wide adjustment range allows Royaltone to adapt to different guitars, pickups, rooms, and playing styles.
PRESENCE Shapes the upper-frequency response of the power amplifier. Higher settings produce a more open and immediate response with a distinct British chime. Lower settings soften the power-stage attack without reducing the usefulness of the main Treble control.
MID-RANGE Provides the final adjustment to the amplifier’s upper-mid response and becomes particularly effective when the power stage is being driven at higher levels. Turn it counterclockwise to reduce high-mid content and create a more scooped response. At its fully clockwise position, the control becomes effectively neutral, leaving the natural midrange established by the Treble, Middle, and Bass network essentially unaffected. This makes Mid-Range a highly effective final adjustment for matching the amplifier to a musical style, guitar, stage, or recording environment.
BRIGHT Provides the greatest increase in treble response for maximum brightness, openness, and upper-frequency detail.
NONE Leaves the voicing neutral, allowing Royaltone’s natural frequency balance to come through unchanged.
TIGHT Increases the treble response for greater clarity, definition, and presence without reaching the stronger emphasis of the Bright setting.
6V6 — 22 WATTS Lower headroom, earlier power-stage compression, and a softer transition into breakup. The response leans toward an American-style character, with a rounded attack and a more relaxed feel when the power section is pushed.
EL34 — APPROXIMATELY 30–35 WATTS Greater headroom, a firmer low-frequency response, and a more immediate, open presentation. Its slightly more forward upper-mid character gives the amplifier a subtle British emphasis and a broader, more expansive sense of scale.
SERIAL MODE Places the connected effect directly in the signal path for conventional FX-loop operation.
PARALLEL MODE Preserves the amplifier’s dry signal while blending in the processed signal. In Parallel mode, the Return control adjusts the level of the processed signal blended with the dry signal.