Revolutionary COBRA KING F9 SPEEDBACK irons deliver the ultimate combination of distance and forgiveness

According to COBRA, their new KING F9 SPEEDBACK irons successfully combine a low center of gravity (CG) and high moment of inertia (MOI) to deliver the perfect blend of ball speed and forgiveness, for the first time, in one iron. 
 
Available in a traditional, variable length set as well as a ONE Length configuration, these irons are packed with an array of cutting-edge technologies. Traditionally in game improvement irons, golfers had to choose between distance or forgiveness. SPEEDBACK Technology is a design concept that utilizes innovative shaping elements to optimize low CG and high MOI to create the company’s longest, fastest and most forgiving iron.

COBRA KING F9

“It cannot be overstated just how technologically advanced the KING F9 SPEEDBACK irons are,” said Tom Olsavsky, vice president of R&D for COBRA Golf.  “Golfers have been forced to choose between distance or forgiveness in their game improvement irons. If you wanted more distance, then you sacrificed forgiveness, and vice versa. With the new SPEEDBACK irons, golfers can have their cake and eat it too.  Never has a game improvement iron set had the perfect blend of distance and forgiveness, until now.”
 
SPEEDBACK is focused on certain key technologies. Primarily, a low CG sole is implemented, a result of mass added low and back using a belt of steel that wraps around the back of the iron. This creates a lower and deeper CG to maximize ball speed, launch and carry distance. SPEEDBACK shaping strategically positions the weight belt just above the contact area on the sole to maintain the width of a conventional game-improvement iron.  To maximize performance, SPEEDBACK shaping allows more mass to also be added low and wide (out to the heel and toe) compared to a traditional iron. Up to 33 grams of tungsten were added to the heel and toe in the 4-7 irons. These shaping improvements increase MOI by up to 10% in the long irons, creating more stability through higher inertia, delivering improvements in ball speed, distance, forgiveness and accuracy. 
 
Other important technologies include its variable thickness face, which is 3 grams lighter and features thin, 1.8 mm pockets in the upper heel and toe that expand the sweet spot. The insert features a deep undercut sole and a 1.2 mm internal Speed Channel that absorbs and returns more energy to the ball. A 3-piece multi-material medallion combines aluminum, a soft Thermoplastic Polyurethane (TPU) and acrylic foam to improve sound and feel by damping vibrations at impact. 
 
The long irons, mid irons and wedges are each designed with different groove shapes to deliver specific performance characteristics. CNC milled V-grooves in the 4-7 irons improve distance by reducing spin, while U-grooves in the 8-PW optimize spin for improved control and accuracy. Tighter-spaced wedge grooves in the GW and SW maximize spin and improve trajectory control for enhanced greenside precision. 

Finally, precision milling delivers more accurate lofts and allows for tighter tolerances on face roughness and groove shaping to optimize spin and trajectory control. Unlike cast grooves, which can vary in shape, CNC milling reduces the variability to ensure consistent performance in every iron.   
 
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