SYNTHESIS ROMA 510AC

Pre owned. In excellent condition. Only one very minor sign of wear, as shown in the photos. Supplied with remote control and original packaging.

The Roma 510AC is a tube integrated amplifier that embodies high-fidelity audio through a perfect balance of aesthetics, build quality, and sonic performance. From the very first glance, it conveys a strong visual presence that reflects the exceptional engineering behind its design. Created for listeners seeking an authentic and emotionally engaging musical experience, it is the result of a passion for music reproduced at the highest level.

The amplifier delivers 80 watts per channel in a push-pull pentode configuration, an impressive output for a tube integrated amplifier that allows it to drive even demanding loudspeakers with confidence. The input stage is built around a 12AX7 dual-triode tube, complemented by a 12BH7 phase splitter, while the output stage employs a pair of KT88 power tubes renowned for their ability to produce detailed, smooth, and dynamic sound.

DC filament supplies are used for all tubes except the output valves, significantly reducing background noise to virtually inaudible levels and greatly improving clarity and transparency. The custom-designed output transformer, manufactured using high-quality silicon steel laminations, ensures wide frequency extension and faithful signal reproduction with outstanding accuracy and natural tonal balance.

The chassis is engineered with exceptional rigidity to provide stable support for both the power and output transformers while isolating them from external vibrations that could affect sound quality. This meticulous mechanical construction plays a key role in the amplifier's remarkably low noise floor and consistent tonal character.

During listening, the Roma 510AC delivers a spacious and three-dimensional soundstage, a rich and textured midrange, and authoritative dynamics while preserving the musicality and harmonic warmth that distinguish the finest tube amplifiers. Every instrument is reproduced with convincing realism and naturally occupies its own place within the soundstage, creating a deeply engaging and emotionally rewarding listening experience.

Daily operation is made simple and elegant by the dedicated ROMA-series remote control, which provides convenient access to volume adjustment, mute, and input selection. Aluminum feet with integrated rubber inserts help minimize the transmission of unwanted vibrations, while gold-plated professional-grade connectors and ceramic tube sockets ensure secure, reliable, and corrosion-resistant electrical connections over time.

Hand-assembled in Italy, the Roma 510AC represents the meeting point between traditional craftsmanship and Synthesis' advanced engineering expertise. Within its class, it stands out for its exceptional combination of power, tonal refinement, and musical involvement, offering performance capable of competing with significantly more expensive amplifiers while maintaining the delicacy and musicality that define a truly high-end tube listening experience.

Technical Specifications

• Output stage (per channel): 2 × KT88
• Input stage (per channel): 1 × 12AX7 / ECC83
• Driver stage (per channel): 1 × 12BH7
• Input impedance: 50 kΩ
• Input sensitivity: 400 mV RMS
• Speaker outputs: 4–8 Ω
• Circuit configuration: Push-pull pentode
• Output power (single channel, THD <1%): 80 W RMS @ 6 Ω
• Frequency response: 20 Hz – 20 kHz ±0.5 dB
• Total harmonic distortion: 1% @ 1 kHz (maximum power)
• Signal-to-noise ratio: >90 dB (A-weighted)
• Inputs: 5 line-level inputs
• Outputs: Variable-level pre-out
• Bias adjustment: Manual, independent for each output tube
• Maximum power consumption: 300 W
• Remote control: Black anodized aluminum body; infrared transmission; RC5 protocol; volume, mute, input selection, and standby functions; 2 × CR2032 batteries; weight 200 g
• Dimensions (W × D × H): 410 × 420 × 210 mm
• Weight: 25 kg