iQ18B - Speaker Turbosound - Free user manual and instructions
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| Product Type | Powered Subwoofer |
| Brand | Turbosound |
| Model | iQ18B |
| Woofer Size | 18 inches |
| Amplifier Type | Class-D |
| Power Output | 1500 W (peak) |
| Frequency Response | 28 Hz – 150 Hz (±3 dB) |
| Maximum SPL | 135 dB (peak) |
| Input Connections | XLR, 1/4" TRS, RCA |
| Output Connections | XLR Link Out |
| Controls | Volume, Polarity, Crossover, Presets |
| Enclosure Material | Birch Plywood |
| Grille | Powder-coated perforated steel |
| Dimensions (H x W x D) | 24.4 x 20.5 x 22.8 inches (620 x 520 x 580 mm) |
| Weight | 79.4 lbs (36 kg) |
| Power Supply | 100-240 V AC, 50/60 Hz |
| Power Consumption | 1000 W (continuous) |
| Protection Features | Thermal, Overload, Limiter |
| Cooling | Fan-cooled |
| Mounting Options | Pole mount, floor placement |
| Included Accessories | Power cord, User manual |
| Maintenance | Wipe with dry cloth; avoid moisture |
| Safety Certifications | CE, ETL, FCC |
| Warranty | 3 years (limited) |
Frequently Asked Questions - iQ18B Turbosound
How do I connect the iQ18B to my mixer?
Use a balanced XLR cable from your mixer's output to the iQ18B's XLR input. You can also use 1/4" TRS or RCA cables if needed. Set the input gain appropriately to avoid distortion.
What is the recommended crossover frequency?
The crossover frequency can be adjusted via the control panel. For typical full-range speakers, start at 80-100 Hz and adjust based on your system and room acoustics.
How do I set the polarity switch?
The polarity switch (0° or 180°) helps correct phase alignment between the subwoofer and your main speakers. Play a low-frequency tone and listen for maximum bass output with the sub in phase.
Can I use the iQ18B outdoors?
Yes, but the enclosure is not weatherproof. Keep it protected from rain and direct sunlight. Use a cover when not in use and avoid prolonged exposure to moisture.
What does the limiter indicator mean?
The limiter indicator lights up when the internal protection circuitry is activated to prevent damage. Reduce the input signal or lower the volume to avoid clipping.
How do I clean the iQ18B?
Unplug the unit. Wipe the cabinet with a soft, dry cloth. Use a damp cloth for stubborn dirt, but ensure no moisture enters the ports. Never use abrasive cleaners.
What are the presets for?
The presets are optimized EQ and crossover settings for specific applications (e.g., music, speech, DJ). Select the preset that matches your content for best performance.
Can I daisy-chain multiple iQ18B subwoofers?
Yes, use the XLR Link Out to connect to the next subwoofer's input. Ensure the total load does not exceed the amplifier's capacity.
Is the iQ18B compatible with a 100V line system?
No, the iQ18B is a low-impedance powered subwoofer (8 ohms) and is not designed for 100V line distribution. Use it with standard audio amplifiers.
What should I do if the subwoofer shuts off unexpectedly?
Check for overheating (allow to cool), power supply issues, or a short circuit. The thermal protection will reset once the unit cools. Reduce the volume if this occurs frequently.
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USER MANUAL iQ18B Turbosound
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Product information
Brand : Turbosound
Model : iQ18B
Category : Speaker