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The Continuum Studio 20 takes the core essence of the Continuum platform and introduces a fresh approach in the power section. Featuring a set of 6V6 tubes, balanced with the right amount of preamp gain and global negative feedback, the Studio 20 offers a distinctly vintage feel, while retaining a modern take on the West Coast sound. It brings a refined tonal character—free from the harshness often found in older designs—making it a smooth, dynamic experience for any player.

Designed for effortless playability, the Continuum Studio 20 provides a responsive and dynamic touch. The combo cabinet is voiced to project with clarity, delivering a well-rounded low end that feels full without becoming boomy. It’s the perfect blend of vintage warmth and modern precision, giving musicians a versatile, inspiring platform to shape their sound.

20 Watt 6V6 x 2 $4350

FEATURES


Close-up of amplifier controls with gain, treble, and mid knobs, signal structure switch, and sparkle switch.

Signal Structure

The Signal Structure circuit is engineered to optimize the level and tonal balance of the preamp’s input stage. By integrating into the preamp’s mixing stage, it offers two distinct gain and voicing modes:

  • HIGH: This mode increases gain while applying a traditional blackface-style low-frequency curve to the bass response. It provides a more “vintage” tonal character, offering higher gain and volume levels, but with reduced headroom on the preamp side.

  • LOW: This mode offers a more contemporary tonal profile, reducing the harmonic distortion common in vintage circuits. It also smooths the signal path, particularly when driven by external pedals, and improves note separation. The lower gain in this mode results in higher preamp headroom.

Close-up of an amplifier control panel with knobs labeled Treble, Middle, Bass, and switches labeled Sparkle, Mid/Boost, Deep.

EQ Toggles

  • SPARKLE: This toggle enhances the high frequencies by providing a boost to the top end of the signal after the tone stack, adding clarity and definition without becoming harsh.

  • MID/BOOST: Engaged before the tone stack, this toggle increases the gain in the midrange frequencies of the preamp stage, accentuating the natural character of the tube saturation and enhancing tonal presence.

  • DEEP: This toggle adds a subtle boost to the low-end frequencies, resulting in a fuller, rounder bass response, enhancing overall warmth without muddiness.

Close-up of a guitar amplifier control panel with knobs labeled Contour, Send, Return, and Reverb, featuring the Sinewave Amplification logo and a reverb EQ switch.

Reverb

The reverb circuit features a highly versatile and musical 3-tube design, utilizing a long decay, 3-spring large tank for rich, immersive reverb effects. The SEND and RETURN controls offer full manipulation of the tail delay and the depth of the reverb mix, providing complete control over the effect’s character.

Reverb EQ Switch

  • BRIGHT: Engages a high-frequency boost in the wet signal, accentuating the treble and creating a more splashy, vibrant reverb effect.

  • NEUTRAL: This is the default mode, providing a balanced reverb response with no added coloration, offering a neutral voicing and feel.

  • DARK: Reduces high frequencies in the wet signal, resulting in a smoother, more subdued reverb with a mellow tonal character.

Close-up of amplifier control knobs labeled "MASTER," "CONTOUR," and "SENSOR."

Power Section Input

The MASTER control serves as the final level adjustment before the signal enters the effects loop and phase inverter. By adjusting the balance between the input gain and the master level, musicians can achieve varying levels of preamp headroom, allowing for a wide range of tonal dynamics and responsiveness.

The CONTOUR control is a post-master volume tone-shaping circuit that manipulates the higher frequency ranges of the signal before it reaches the power section. This provides a useful tool for on-the-fly tonal adjustments, especially in live performance situations. It functions as a mix control for bright or dark pickups, helping to tailor the overall tone. When fully rotated clockwise, the CONTOUR control has no effect on the signal. As it’s turned counterclockwise, the circuit engages, softening the treble frequencies for a smoother, more rounded sound.

BACK PANEL FEATURES


Back view of a guitar amplifier with a visible speaker and control panel, featuring various input/output jacks and power switches.
Close-up of amplifier control panel showing 'Bias Adjustment,' 'Bias Test-Point,' and 'Ground' labeled connections.

Bias Adjustment

The Bias Adjustment feature includes an external potentiometer and a multimeter probe point for precisely setting the idle operating range of the output tubes. This system simplifies and streamlines the process of replacing output tubes, allowing for quick, safe, and accurate bias adjustments. By providing direct access to the bias voltage, it ensures optimal performance and longevity of the output tubes, without the need for complicated internal adjustments

Close-up of speaker output jacks on an amplifier with impedance labels for 4 Ohm and 8 Ohm connections.

Speaker Output

Always connect amplifier to correct speaker load before powering up. By not doing so can lead to the output transformer having an extremely bad day.

Close-up of an effects loop panel with 'Send' and 'Return' jacks, labeled 'Passive Insertion Point Post Master Volume.'

Effects Loop

The Effects Loop is a passive, series interface designed primarily for time-based effects. The MASTER volume functions as a level control for the SEND signal, allowing precise control over the amount of signal sent to external effects. The RETURN stage is optimized for use with balanced, buffered pedals or interfaces, ensuring optimal signal integrity.

Incorporating a RETURN level control can be particularly beneficial, as it allows for fine-tuning of the signal level when reintroduced to the amp’s phase inverter, ensuring a seamless integration of the effects loop with the amplifier’s overall tonal balance.

Tube Compliment:

  • 20 Watt 6V6 x 2

  • 12AX7 x 4

  • 12AT7 x 1

Specs:

  • Combo Dimensions - 20.5”W x 22”H x 11”D

  • Weight 40lbs