SEAS Excel W22NX001-GRAPH (E0077) 8" Graphene Cone Woofer

SEAS Excel W22NX001-GRAPH (E0077) 8" Graphene Cone Woofer- 220mm- 8 ohm

Spec Sheet PDF

Graphene coating for improved micro-detail! Read Seas Graphene White Paper PDF

Smooth midrange for 8" with good control from phase plug. Excellent bass potential as low as mid-30 Hz region in large vented box.

• Precision cast, machined and Graphene treated magnesium cone acts as a piston throughout the audible frequency band without showing any sign of midrange resonances.
• Titanium voice coil former with a long copper coil winding for excellent force transfer, transient sound reproduction and large linear excursion. 
• FEA optimised magnet system with precisely fitted copper parts for excellent linearity, high power handling and low distortion. 
• The extremely stiff and stable injection moulded metal basket keeps the critical components in perfect alignment. Large windows in the basket both above and below the spider reduce sound reflection, air flow noise and cavity resonance to a minimum. 
• Gold plated terminals mounted on a glassfibre reinforced plate to reduce contact resistance and improve reliability.

As with other designs in the Excel Graphene range, the precision cast, machined, and Graphene treated magnesium cone acts as a piston through the working frequency band without showing any sign of midrange resonance. High purity Graphene, which is a nano-material with special properties, is added to the surface treatment. The SEAS Excel magnesium cone itself is known for its low moving mass and its high stiffness and damping, unrivaled in the industry, and therefore capable of transmitting even the finest details from mechanical motion into the air, resulting in the cleanest and purest sound.

High damping magnesium is a superior material for woofer cones because of its damping properties and light weight, combined with the good sound speed which stems from the stiffness-to-weight ratio. For woofer cones, the damping is of highest priority, even if it compromises stiffness a bit, because the woofer cones have their early break-up modes inside the audible frequency range. The Graphene-coating technology used by SEAS was developed in cooperation with CIC nanoGUNE in Spain: www.nanogune.eu/ and Dr. Perez-Jimenez.

According to SEAS, the W22NX001 woofer is optimized in several ways over its predecessor, the W22EX001, both regarding the cone technology, with the graphene treatment, but also in the motor system, with a new (and in this case longer) voice coil. A titanium voice coil former with a long copper voice coil winding gives a very stiff connection to the cone and provides excellent force transfer, to achieve large linear excursion and the non-conductive former also doesn’t add any damping to the excursion to allow for a very precise and transient sound reproduction, without electromagnetic damping.

An FEA optimized magnet system with precisely fitted copper parts for excellent linearity and symmetry is designed for high power handling and low transient distortion. A heavy copper ring below the T-shaped pole piece reduces nonlinear and modulation distortion and an additional copper cap in the air gap of the magnet system reduces distortion and voice coil inductance, resulting in a sound without coloration. The exact geometry of the pole piece is optimized for completely linear inductance, independent on input power.

Suggested Box Alignments

• Sealed box of 0.6 cubic feet for F3 of 53 Hz. 50% filling
• Vented box of 0.8 cubic feet for F3 of 43 Hz. 2" diameter vent by 7.7" long
• Vented box of 1.5 cubic feet for F3 of 33 Hz. 2" diameter vent by 5.4" long