| This is the first 3D tour and the sound system is quadrophonic, so the quality should be fantastic. |
| Yet the Floyd's masterful quadrophonic pension plan has retained an amazing capacity to knock people sideways. |
| We had to rig a quadrophonic PA system at the back of the stalls, although it was only used for the opening of the show. |
| But the echo of the clicking of the turnstile was quadrophonic and the general acceptance of the 7s financial success became a given. |
| Once the West Stand start waving the tartan blankets and flasks the Riverside will have an awesome quadrophonic suround-sound effect. |
| Sound in the home itself has progressed from high fidelity to stereophonic and to quadrophonic sound. |
