Specifications of the Ravenscroft Model 220
| #1 bass string length | 1,677 mm (66") | |
| Weight | 385 kg (849 lbs) | |
| Length | 220 cm (7' 3") | |
| Height | 104 cm (3' 5") | |
| Width | 154 cm (5' 1") | |
| Rim | 65mm thick, 37ply alternating beech mahogany cross laminated construction | |
| Bracing | 3ply solid beech beams with horizontally laminated beech belly rail | |
| Action | RENNER -CAD optimized, with ± .1 grams accuracy in weigh-off | |
| Keys/Keyframe | Kluge keys and keyframe | |
| Keytop material |
Naturals: Tharan from Kluge - Ivory and multiple options available
Sharps: Solid ebony standard - multiple options available |
|
| Soundboard | Italian Fiemme Spruce or AAA select Sitka Spruce - other options available | |
| Ribbing | Hand-selected eastern Canadian spruce | |
| Pinblock | Bolduc 5ply quarter-sawn maple | |
| Tuning pins | Diamond pins from Klinke of Germany | |
| Bass Strings | Ravenscroft specific design | |
| Plain wire | Mapes International Gold | |
| Bridges | Ravenscroft specific design - vertically laminated body of ebony, hard rock maple and mahogany with select hardwood cap | |
| Bridge Pins | Titanium | |
| Hitch Pins | Titanium | |
| Duplex scaling | Multiple rear duplex scaling from note 49 to 88 | |
| Lyre | Patented box/frame construction for maximum structural integrity | |
| Trapwork | All steel construction for maximum performance and structural integrity | |
| Keybed | 40mm thick, 3ply solid select white spruce with steel reinforcement bar | |
| Music desk | Patented 4-position music desk | |
| Lid prop | 3-position | |
| Casters | German manufactured, solid brass, locking concert casters with hard rubber outer layer - numerous options available | |
| Pedals | Sustain, full sostenuto, soft (una corda) | |
| Finish | German hand finished polyester or numerous options available | |
| Fallboard | Soft fall, hydraulic controlled closure system |
