is almost 30% bigger to float large speaker cabinets.
Now 4x12s, 15″ or 18″ speaker cabinets will benefit from the awesome GreatGRAMMA.
Only GreatGRAMMA v2 can handle the big rigs!
• A tighter, more focused low end
• Hear the true sound of your amp, loudspeaker or subwoofer
• Instantly improve your sound on-stage or in the studio