This guide details the controls and connections for operating your powered subwoofer, ensuring optimal sound quality and system integration.
Input and Output Connections:
1. INPUT L and INPUT R (Line-Level Inputs)
- Accepts mono/stereo XLR or ¼-inch Jack plugs via COMBO sockets.
- Balanced inputs for reduced noise and interference.
- Ideal for connecting to a mixer or audio source.
2. THRU L and THRU R Outputs:
- 3-pin XLR outputs for passing the incoming signal to other speakers or equipment.
- These outputs are unaffected by the subwoofer’s internal settings (LEVEL, FREQUENCY, or PHASE).
Control Panel Features:
3. LEVEL Control Knob:
- Adjusts the output level of the subwoofer.
- Recommended setting: Keep the signal below 0 dB on your mixer to prevent distortion.
- Does not affect the signal passed through THRU L and R outputs.
4. Indicator LEDs:
- Power: Lights up when the subwoofer is turned on.
- Signal: Illuminates when an audio signal is detected.
- Clip: Lights up if the input signal exceeds 0 dB. Brief flashes are acceptable; avoid constant clipping to maintain sound quality.
5. PHASE Switch:
- Inverts the phase of the subwoofer’s output signal.
- Use this feature when multiple subwoofers are positioned such that low-frequency cancellation occurs.
6. FREQUENCY Control Knob (Cutoff Frequency):
- Adjusts the cutoff frequency to match connected speakers.
- Recommended Settings:
- 75 Hz for SR12 and SR15A speakers.
- Slightly higher for smaller SR10A speakers to cover the full frequency range.
- Does not affect the THRU L and R outputs.
Power and Safety Features:
7. Fuse:
- Protects the amplifier’s power supply module.
- Replace only with a fuse of identical specifications to avoid damage.
8. Voltage Selector:
- Adjusts the subwoofer’s voltage setting to match the electrical outlet:
- 110–120V or 220–240V (ensure correct position before powering on).
9. Power Button and Power Input:
- Power Button: Activates the subwoofer. Ensure the LEVEL knob is set to 0 before turning it on.
- Power Input Socket: Connects the subwoofer to an electrical outlet using the provided IEC power cord.
Usage Tips for Optimal Performance:
- Signal Chain: Use balanced inputs for better sound quality, especially in long cable runs.
- Clip LED Monitoring: Ensure the Clip LED lights up only briefly during peak signals to avoid distortion.
- Phase Adjustment: Experiment with the PHASE switch if low frequencies sound weak or inconsistent.
- Cutoff Frequency: Adjust the FREQUENCY knob based on your main speakers for seamless frequency coverage.
- Safety Precautions: Always verify the voltage selector matches your outlet before powering the unit.
18" Powered Subwoofer with 600W RMS Output – Technical Specifications
The 18" Powered Subwoofer delivers robust low-end performance, advanced controls, and durable construction, making it ideal for live sound, installations, and mobile setups.
Technical Specifications:
Power and Amplification:
- Output Power:
- 600W RMS continuous power
- 1200W Max dynamic power
- Amplifier Class: Class D for high efficiency and low heat.
- Power Supply: Switched-Mode Power Supply (SMPS)
- Voltage: 115V/230V~50/60Hz (selectable)
Acoustic Characteristics:
- Frequency Response: 35 Hz – 150 kHz
- Maximum SPL: 127 dB
- Filter Cutoff Frequency: Adjustable between 60 Hz and 150 Hz
Driver:
- Woofer Size: 18-inch
- Voice Coil: 4-inch diameter
- Impedance: 8 Ohms
- Power Handling: 800W RMS
Inputs and Outputs:
- Inputs:
- 2 Line-Level Inputs (Left and Right) via COMBO XLR/Jack sockets
- Outputs:
- 2 Line-Level Outputs (Left and Right) via XLR connectors
Controls and Indicators:
- Controls:
- Main Volume Control
- Cutoff Frequency Adjustment Knob
- 180° Phase Inverter Switch
- LED Indicators:
- Power
- Signal Detection
- Clip (input overload)
Protection Features:
- Built-in protections for reliability and longevity:
- Short-circuit protection
- Thermal protection
- Limiter to prevent signal distortion
Housing and Construction:
- Material: Durable cubic plywood housing
- Mobility:
- 4 88mm self-braking wheels for easy transport and stability
- 4 rubber feet for secure stationary placement
- Mounting Plate: 35mm plate for coupling with a speaker pole
Physical Dimensions:
- Dimensions (HxWxD): 770 x 680 x 560 mm
- Net Weight: 39 kg
Applications:
This subwoofer is ideal for:
- Live performances and DJ setups
- Fixed installations in clubs and event venues
- Portable PA systems
With its powerful 18" driver, high SPL, and robust construction, this subwoofer guarantees exceptional bass reproduction for professional audio environments.
