The IW-28 SUB is an in-wall subwoofer that uses dual 8” woofers to deliver rich, vibrant bass to custom-installed audio systems.
The 28 SUB has several features that maximize its flexibility:
As can be expected, the IW-28 SUB can be used as the speaker portion of a separately-powered LFE subwoofer in a true 5.1/7.1 system. When used this way, the convenient IW-28-SUB-front-grille-cut_thm.jpgfront-panel switch for the SUB’s crossover would be set to ‘off,’ and the jumpers connecting the two sets of input terminals are left in place. An RCA cable goes from the receiver’s Sub Out jack into a monoblock amplifier (such as Atlantic’s SA-180), and then from the monoblock amp into the 28 SUB. All low-pass/high-pass crossover functions are then handled by the receiver’s bass management system, as when using any powered subwoofer.
However, the 28 SUB has two sets of input terminals (one set for each 8” driver) and an on-board passive low-pass crossover so that it can be driven directly off the front left/right speaker outputs of the system’s receiver—without the need for a separate amplifier. When used this way, the jumpers would be removed and the receiver’s L/R outputs simply connect to the individual terminals of each of the 28 SUB’s woofers. The 28 SUB’s on-board low-pass crossover—switched ‘on’—ensures that the sub receives only the lower bass frequencies
SA-180 Mono-Block amplifier
The SA-180 Mono-Block amplifier delivers a prodigious 180 watts RMS to the IW-28SUB. It is equalized to provide in room bass response that achieves a remarkable -3dBat 35Hz without a back box. The SA-180 also features a signal sensing auto on/off or a 12 volt trigger, easy access Phase control, RCA Thru jack for daisy chaining additional amplifiers all in a compact 2" high chassis.
- Dual heavy-duty long-throw 8-inch woofers
- Thin Bezel & Magnetic Grille design disappears into the wall
- Solid, resonance-free MDF baffle
- Built-in, defeatable low-pass filter
- Easy to install in new and existing construction