FRFR speaker/cab solution that can keep up with 100w valve heads? in Helix Posted December 20, 2016 Just fired up a pair of Yamaha DXR10s today in stereo with the Helix and they're really impressive! They can get plenty loud while not being quite as large nor heavy as the DXR12s. Plus, they're covered with a 7 year warranty. I preferred the Yamaha's sound to the JBL EONs (and I've always been a fan of JBLs and have several of their monitors).