Built to Perform, Built to Last

• Inputs: Stereo RCA (Single Ended)

• Outputs: Stereo RCA (Single Ended)

• Dimensions: 300 × 200 × 55 mm (same footprint as our flagship Cassius)

• Construction: Solid steel enclosure, designed for mechanical stability and electromagnetic shielding

• Hand-built in small batches for consistency and quality

Technology & Innovations

Capless Master Repro Topology: No capacitors. No compromise.

At the heart of ROLLO SE lies our “Capless Master Repro” circuit — a topology that removes every single coupling capacitor from the signal path. Capacitors, even the finest, inevitably smear transients, soften textures, and introduce coloration. By eliminating them entirely, ROLLO SE delivers music with unmatched speed and transparency. You hear what is on the tape — nothing added, nothing subtracted.

Proprietary Servo Stability

To achieve a capacitor-free signal path, we developed NERENEAS proprietary servo loops. These intelligent control systems ensure the correct static operating point of the circuit, locking it in place with rock-solid precision and preventing drift over time. The result is a design that remains perfectly stable, even under demanding conditions — so the sound you hear today is the sound you’ll hear tomorrow, unchanged.

Ultra Low Noise Design

The signal from a tape head is vanishingly small — often in the microvolt range. Amplifying it without burying the music under hiss or interference requires an uncompromising approach. ROLLO SE uses a discrete JFET input stage with a carefully optimized 100 kΩ input impedance, offering an exceptionally low noise floor that preserves the finest musical nuances.

On the output, a discrete JFET buffer with 2 kΩ output impedance ensures effortless drive capability and seamless integration with any downstream equipment. This dual-JFET architecture guarantees that your music remains intact — powerful, stable, and pure.

Ultra Wide Bandwidth for Exceptional Sound

A tape head preamplifier doesn’t just amplify the signal — it shapes the entire musical experience, determining how natural, spacious, and lifelike the playback feels. One critical factor is phase integrity: if phase shifts occur, instruments and voices lose their precise placement in the stereo field.

ROLLO SE is engineered to preserve absolute phase accuracy:

• The “Capless Master Repro” topology delivers an ultra-wide bandwidth, ensuring the delicate tape head signal is amplified without introducing phase shift. The result is a soundstage that remains clear, deep, and natural, with instruments locked in place as if you were there.

• The equalization curve is integrated directly into the input stage, avoiding additional gain blocks in the path. This keeps the bandwidth wide open and ensures that only the EQ circuit defines the tonal balance — nothing else interferes.

• With no capacitors in the signal path, transient response is lightning-fast, textures are unblurred, and dynamics remain explosive.

With ROLLO SE, you experience a clean, full-bodied presentation that allows your tapes to reveal their true depth, clarity, and life.

Your settings, your sound — remembered forever.

Most Reel-to-Reel tape machines rely on low-cost transistor switches placed directly in the signal path. These introduce leakage, distortion, and noise — subtle at first, but enough to veil detail and reduce clarity over time.

ROLLO SE avoids these compromises by employing high-quality latching relays, controlled by a dedicated microcontroller. Both the EQ curve and the two selectable gain steps are switched using these relays, ensuring precise, repeatable, and noise-free control.

Importantly, the relays themselves are never placed in the direct audio path. This guarantees that no distortion or artifacts are added to the signal.

To make the experience seamless, your chosen EQ curve and gain setting are stored in non-volatile EEPROM memory. Even after powering off, ROLLO SE remembers your preferences — so every listening session starts exactly where you left it.

“Precision relay control and memory retention ensure your signal stays untouched — and your music always plays your way.”

Silentio inside: ultra-low noise power for absolute purity

Power is the foundation of great audio. A tape head preamplifier is only as good as the supply that feeds it. That’s why ROLLO SE integrates our SILENTIO ultra low-noise power supply directly inside its chassis.

SILENTIO is built around the renowned LT3045 and LT3094 regulators, delivering exceptionally clean, stable, and ripple-free rails. This dual-stage design ensures the audio circuitry operates in absolute silence, free from interference and contamination.

By eliminating power-related artifacts at the source, ROLLO SE allows the most delicate tape signals to emerge unmasked — with blacker backgrounds, greater dynamic range, and breathtaking clarity.