Sigma Acoustics · Orchestra
Orchestra 2.8
The low end is reproduced by a dual 25 cm lightweight, fast woofer.
Sonic characteristics
The marvellous soundof temporal coherence.
Dynamic, tonal delicacy, detail: the characteristics one notices at first listen. Dual fast, lightweight 25 cm woofers ensure an authoritative yet nimble bass response.
The drivers
The synergy of drivers.
The Heil tweeter — Air Motion Transformer — is recognised as one of the finest high-frequency drivers of any era: the speed with which it creates sound and returns to silence gives a sense of tangible presence.
The cabinet
Form serves only the sound.
A perfect fusion of aesthetic form in pure service of sound, with diagonal routing and curves that distribute the energy emitted by the drivers. Multi-layer hardwood veneers and high-density MDF, each calibrated to absorb or resonate at critical frequencies.
Technical specifications
Data sheet
All relevant parameters for the integration and technical evaluation of the Orchestra 2.8 model.
Complete technical documentation, CAD files and frequency response curves are available on request.
| Type | 3-way bass-reflex |
| Tweeter | Heil Air Motion Transformer |
| Midrange | Accuton ceramic series |
| Woofer | Dual 9" (25 cm) artisan · neodymium magnet |
| Sensitivity | 93 dB |
| Impedance | 8 Ω |
| Max power | 180 W |
| Recommended amplification | 40 W to 180 W |
| Frequency response | 22 – 24,000 Hz ± 3 dB |
| Crossover | 6 dB/octave · crossover 150 – 1,900 Hz |
| Dimensions | 30 × 76 × h143 cm |
| Weight | 75 kg each |
| Warranty | 10 years on cabinet · 5 years on components |