The SUBline 115SA has been completely redesigned with a bass-reflex configuration, built in birch plywood and aimed to extend the low frequency response to a wide range of FBT speaker systems. Created with the aim to maximize SPL/SIZE ratio, they have Class D amplifiers, switch mode power supply and Digital Signal Processor with presets to match any other FBT speaker. With IN/OUT stereo connectors, it is possible to use only one subwoofer with Left and Right speakers. The Neutrik TRUE1 Power connection negates the need for a power switch while offering a solid locking connection. Optional wheels,, ergonomic integrated carrying handles and tour-grade plywood cabinets allow an easy transport Features: Bass-reflex design with high SPL and punch 380mm (15") high excursion magnet woofer with 75mm (3") voice coil Frequency response from 40Hz to 140Hz New amplifier engineered and manufactured by FBT, 700W RMS LF in Class D Digital Signal processor with 8 presets, 2 equalization with 2 LPF Crossover settings, cardioid configuration Control panel with Stereo XLR in/outs, Volume, EQ presets, 8 steps Delay from 0.25m to 3.5m, Phase Reversal Switch0-180, 3 status LED indicators 15 mm (0.59") birch plywood scratch resistant enclosure with internal bracing M20 (20mm) top mount speaker stand socket and two aluminum ergonomic FBT handles Echotone Music LLC is an experienced E-commerce Audio Visual Equipment dealer since 1998. We take pride in selling Pro Audio gear for musicians, sound engineers, production companies and broadcast applications. Shipping -Pro packed shipped USPS, UPS or Freight Service. Contact us pay for 2 day air upgrade on any unit. We are working hard to get your product ( built if needed), processed shipped. Processing times vary, 2-30 days Returns/Refunds- Customer pays for return shipping. Returned items must be sealed/unopened to qualify for a full refund. Refunds are for the Item cost only. Gear returned with out all its original packaging, accessories or shows signs of wear, is subject to an additional service fee. This item is now used and it would be unfair to resell to another customer as new. What products can not be returned? - International Sales Clearance items, Custom Builds, Road Cases, DT12 items, items identified as non-returnable, discontinued items, used or NOS items, electronic software downloads, demo gear, computer Cards, vacuum tubes, earbuds, harmonicas raw-frame speakers, turntable cartridges, fog fluid