Ernie Ball 2730 7-String Cobalt Skinny Top Heavy Bottom

1. HEADING Ernie Ball 2730 Cobalt Skinny Top Heavy Bottom 7-string – higher output and a tight low B

2. SELLING DESCRIPTION Ernie Ball 2730 Cobalt “Skinny Top Heavy Bottom” is a 7-string set for players who want more punch, more definition and a more immediate attack from their pickups. The cobalt-wound construction is designed for strong magnetic response, giving you a “hotter” feel under the pick, clearer separation in complex chords and a tighter low end that stays together for high-gain riffs and modern rhythm work.

The wound strings feature a cobalt alloy wrap on a steel core, while the treble strings are plain steel, delivering a clear, articulate top end with pronounced harmonic overtones. The tension profile is designed to feel like the best of both worlds: light top strings for bends and lead, and a heavier bottom end that feels stable, controlled and “firm” under hard picking. At the same time, many find that the set retains its “snap” and clarity longer than more traditional nickel-wound sets, although lifespan always depends on hand sweat and how much you play.

This set is especially suited to 7-string guitars in standard B–E–A–D–G–B–E and closely related or slightly down-tuned setups, where you want to keep the low B tight and precise. Gauges range from 0.25 mm to 1.57 mm, giving you a distinct heavy-bottom feel without making the top end stiff. Please note that switching to a heavy-bottom set can change pull/tension enough that some guitars may benefit from a small setup (intonation and/or truss rod) so the guitar feels right and stays in tune optimally.

3. SPECIFICATIONS (Markdown Table)

• Type: Elguitarstrengesæt (7-streng)
• Materiale: Wound: cobaltlegering (cobalt-plated steel wrap) på stålkerne; Plain: plain steel
• Dimensioner: Gauges: 0,25 / 0,33 / 0,43 / 0,76 / 1,07 / 1,32 / 1,57 mm
• Vægt (kg): 0,06
• Model/varenr.: 2730
• Serie/type: Cobalt “Skinny Top Heavy Bottom”