Description
Solid foundation for everyday systems—the CELTO C2.6 provides a genuine 2× 400W 8Ω / 2x 600W 4Ω With smooth, musical delivery in a classic 2U design. This 2-step Class H amplifier excels in small to medium installations and portable setups with consistent performance. Low-noise preamp with PeakStop Opto-Limiter ensures clean signal path and speaker protection without coloration. Comprehensive safeguards including soft-start, short-circuit, and thermal protection keep operations worry-free. Front-to-back cooling with temperature-regulated fans maintains stability even under heavy load. NEUTRIK XLR inputs/links, NEUTRIK SpeakON outputs, plus binding posts offer flexible connectivity. At 14 kg, it's built like a tank yet remains manageable for mobile use. The C2.6 proves that sometimes the quiet, dependable option is the smartest choice in the rack.
Key Features
- 2x 400W 8Ω / 2x 600W 4Ω With bridge mode 1x 1200W 8Ω
- 2-step Class H topology for efficient, reliable performance (70% efficiency)
- Full protection suite and PeakStop Opto-Limiter for worry-free operation
- Robust linear toroidal PSU and efficient heatsink cooling for sustained performance
Applications
Installation
Sound Architecture
Portable
Professional sound, on demand
Technical specifications
| Channels | 2 |
| RMS Power 8Ω (per ch., EIA 1 kHz 1% THD) | 400W |
| RMS Power 4Ω (per ch.) | 600W |
| RMS Power 2Ω (per ch.) | Not recommended |
| Bridge 8Ω | 1x 1200W |
| Bridge 4Ω | Not recommended |
| Frequency Response (-1 dB) | 20 – 20 000 Hz |
| Typical THD | < 0.1 % |
| Signal to Noise Ratio (A-weighted) | 108 dB |
| Crosstalk (1 kHz) | > 65 dB |
| Slew Rate | > 15 V/µs |
| Damping Factor (8Ω) | > 500 (internal) |
| Voltage Gain | 37.3 dB (58 times voltage) |
| Input Impedance | 20 kΩ balanced |
| Preamp | Low noise and low distortion circuit with PeakStop Opto-Limiter |
| Output Stage / Class | 2-step Class H (70% efficiency) |
| Power Supply | Linear topology with toroidal transforner |
| Cooling | Temperature regulated long life brush-less fans, front to back airflow |
| Power Connector | SEETRONIC PowerCon |
| Input Connectors | 2x NEUTRIK XLR + 2x NEUTRIK XLR Link |
| Output Connectors | 2x NEUTRIK Speakon NL4 + 2x speaker Binding post terminals |
| Dimensions (W×H×D) mm | 483×88×378 (2U) |
| Weight Net | 14 kg |
| series shortname | cseries |
We talk about it
See C2.6 in action
Queensland
St Joachim's Catholic
C2.6
iFIX13S G2
CELTO speakers deliver extraordinary speech intelligibility in a welcoming family-focused Catholic parish – turning years of sound system struggles into outstanding praise from the entire congregation.
March 12, 2026
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Queensland
Annandale Christian School
C2.6
CMP10
CSW221
ISORAY10+
P4.14
Annandale Christian College's multipurpose hall transforms from acoustically challenging to crystal-clear perfection – thanks to a full CELTO audio upgrade combined with strategic acoustic treatment, leaving the Principal stunned by the unbelievable results.
March 12, 2026
Read article