Quadraspire SV Bronze 30 Upgrade (Pair)

The SV Bronze 30 Upgrade replaces the standard feet under a Quadraspire shelf with solid bronze ones. It sits under every level of the X-Reference, and it can also go under the top shelf of any Q4 Evo or SVT range rack or wall shelf. Bronze carries a broader tonal spectrum and greater sustain than the standard fitting, which opens up the soundstage without thinning out detail. Sold as a pair.

What changed for the 30th

For the Q4 Evo's 30th anniversary, Quadraspire reworked the original SV Bronze Upgrade. The new foot carries less mass and has a hole bored all the way through, which lets resonance dissipate more quickly and smoothly.

Why bronze

Bronze is a high-copper alloy, and it is the same family of material used for the bodies and bells of metal wind instruments and for the winding on acoustic guitar, mandolin and violin strings. Quadraspire chose it for those harmonic qualities: a broader response spectrum and longer sustain, arrived at through listening tests rather than simulation, in the way instruments themselves are voiced.

Avoiding parallel lines

The bronze upgrades are designed to avoid parallel surfaces, following the same principle used in most musical instruments to keep resonance from building up in one place. The assembly is spiked and adjustable, so you can level a shelf finely once it is fitted.

Fitting

These retrofit to an existing rack. Sold in pairs, so a full shelf on a four-column rack takes two. A shelf holds up to 80 kg (175 lb) with or without the upgrade. Made in Britain.

Quadraspire SV Bronze 30 Upgrade Specifications