Description
Ernie Ball’s Extra Slinky Flatwound bass strings rethink what a flat set can do. Instead of relying on older alloy formulas, they’re built with Cobalt u2013 a magnetically responsive metal that reads more strongly off your pickups’ magnets than standard wrap materials. The payoff is a set that hits harder, translates more clearly, and holds its tone over a longer playing life.
Construction is where the magic happens. A SuperBright Cobalt ribbon forms the outer wrap, layered over a Cobalt under-wrap, all wound around a precisely tuned hex core. Ernie Ball dialed in the wrap-to-core ratio specifically to let this set walk the line between two worlds: the glassy, low-friction feel of vintage flatwounds under your fingers, and the forward growl and harmonic snap normally reserved for roundwounds.
The result is a bass string that feels broken-in from the first note but still cuts through a mix with articulation and edge. Whether you’re chasing a warm, upright-adjacent tone or need flats that can still growl in a rock or funk context, this Extra Slinky gauge set (.040u2013.095) delivers flexibility without sacrificing the smoothness flatwound players come back for.
- Cobalt alloy wrap for stronger magnetic response and higher output
- SuperBright Cobalt ribbon outer wrap over a Cobalt under-wrap
- Optimized hex-core to wrap ratio
- Extra Slinky gauge: .040u2013.095
- Smooth flatwound feel with roundwound-like brightness and growl
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