P 284 Mistral kuyruklu konser piyanosu konser salonlarında kullanılmak için ustalıkla yapılmış bir enstrumandır. Sonsuz ses potansiyeli ile müzikal anlamda yorum isteyen parçalar için son derce uyumludur. Karekteristik PETROF tınısına ve muhteşem bir dış görünüşe sahiptir
a – 1580 mm
b – 2830 mm
Yükseklik – 1014 mm
Ağırlık – 560 kg
| Length (mm) | 2840 |
| Width (mm) | 1580 |
| Height (mm) | 1025 |
| Weight (kg) | 576 |
| Sound board material | Resonance spruce wood |
| Active area (m²) | 2,029 |
| Ribs (number, shape) | 16, asymetric |
| Soundboard construction | diaphragmatic tapered by CNC shaper 9,5 - 7,5mm |
| Cast iron plate | Wet sand casting |
| Surfacing of iron plate | light gold metallic paint, diamond effect |
| Pin block - material | Multiplex beech plywood, density 800 - 850 kg/m3 |
| Inner rim material | 12 laminas - beech, birch |
| Inner rim thickness | 50 mm |
| Wooden frame posts | 5 longitudinal + 2 cross |
| Descant post material | spruce |
| Cut off bar (corner cross rib) | round shaped, multiple birch or beech |
| Outer rim - material | birch plywood sandwich, inner veneer Ebony Makassar |
| Bridge - treble | solid maple wood |
| Bridge - bass | solid maple wood |
| Bridge pins | steel - ground tips |
| Agraffes material - number | brass, 1-53 |
| Duplexes - front | d2 - c5 |
| Duplexes - rear | ais - c5 |
| Strings - material | steel wire Röslau Germany, copper winding Degen Germany |
| Hitching of plain strings | single |
| Dampers - number | 1 - 69 |
| Action | standard - RENNER ORIGINAL |
| Hammer heads | RENNER original |
| Keyboard | Tangential sawn spruce wood, individually balanced with lead |
| Black keys | Ebony wood |
| Pedals | left - Unacorda (Piano) pedal, middle - Sostenuto (Prolongement) pedal, right - Sustein pedal |
| Legs and castors | thick legs, big braked castors |
| PETROF sign on right side wall | PETROF |
| Felts colour | red + black |
| Hydraulic slow close fallboard mech. | yes |
