Overview
Feature List
- Dual heavy-duty long-throw 8-inch woofers
- Solid, resonance-free MDF baffle
- Built-in, defeatable low-pass filter
- IR knockout
- Uses GFR-626 Grille/frame assembly (sold separately)
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Product Specs
Specifications IWTS-28 SUB
| Model |
IWTS-28 SUB |
| Type |
In-Wall Subwoofer |
| Drivers |
|
| Woofer |
(2) 8" (203mm) heavy-duty, long-throw |
| Tweeter |
N/A |
| Frequency Response |
38-200 Hz +/-3d |
| Nominal Impedance |
Each driver 8 ohms; paralleled together, system is 4 ohms |
| Crossover Frequency |
200 Hz w/built-in low-pass filter |
| Sensitivity |
89dB |
| Recommended Amplifier Power |
30-200 watts RMS |
| Magnetic Shielding |
No |
| Dimensions w/ grilles (W x H x D) |
12 5/16 x 21 5/8 x 3 7/8" (312 x 547 x 100mm) |
| Cutout Dimensions (W x H) |
11 1/2 x 20 3/8" (283 x 518mm) |
| New Construction Bracket (Optional) |
IN-NC-626 |
| Weight (ea) |
14 lbs (6.36 kg) |
SA-180 Monoblock Subwoofer Amplifier Specifications
| Model |
SA-180 Monoblock |
| RMS Power |
180 watts, 4 ohms |
| Signal to Noise Ratio |
<97dB full power |
| Total Harmonic Distortion |
0.05% @ full output |
| Low Level Input Sensitivity |
250mw full output, 100Hz |
| High Level Input Impedance |
15K Ohms |
| Power Supply Storage |
9,400 mfd |
| Toroid Transformer(s) |
400 VA |
| Peak Output Stage Current |
30 amps |
| Net Weight |
14 lbs. |
| Height |
2“ 1.5-U (50mm) |
| Width |
8.5” (215mm) |
| Depth |
12.5" (320mm) including knobs and rear terminals |
Atlantic Technology reserves the right to change specifications or appearance at any time without notice.
Details
Flexibility
The IWTS-28 SUB is an in-wall subwoofer that uses dual 8” woofers to deliver rich, vibrant bass to custom-installed audio systems. It is easily retro-fitted to existing construction using Atlantic’s GFR-626 grille/frame assembly, the same grille frame assembly used for several other Atlantic speaker systems: the IWCB-626, The IWCB-727 THX Select 2, and the IWTS-30 LCR THX Ultra 2.
The 28 SUB has several features that maximize its flexibility:
As can be expected, the IWTS-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 front-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.
Manuals 
Video
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