The Orchestra displays stainless steel chassis with tubes mounted on ceramic sockets with golden pins. It has 4 EL34 tubes mounted in push-pull which are driven by 2 ECC83. 
This is the result of a very thorough study undertaken by Jadis with one main objective: to make a product with all the essential qualities of a high-end device at a reasonable price. 
The JADIS REFERENCE version provides a golden finish for front and top plates also, tone controls can be added.

This is one of those amplifiers that offer fantastic sound no matter what you play. […] It gives you a perfect sense of space, openness and airiness and a very dynamic sound. You will hear every single note as clearly as possible. When listening to your favorite music with this amp, you truly experience it as if you were witnessing a live performance...

"NoiseAddicts" : Jadis Amplifiers: Delicate Warmth of France

Web reviews: 

Orchestra review on Stereophile
http://www.stereophile.com/content/jadis-orchestra-reference-mkii-integrated-amplifier#84KrpyB3BZJzlFlb.97

http://www.hifilive.es/2014/09/23/jadis-orchestra-reference-se-2

SPECIFICATIONS