Velodyne Acoustics SPL-X 18 Subwoofers

Velodyne Acoustics SPL‑X 18 Subwoofer — The Ultimate Low‑Frequency Powerhouse

The SPL‑X 18 sits at the pinnacle of Velodyne’s SPL‑X series, bringing uncompromising sub‑bass performance to large rooms, pro theaters, or serious audio installations. With a massive 18″ driver, flexible DSP tuning, and high output capability, it’s engineered to deliver earth‑shaking bass with control and precision.

Key Features & Specifications

• Driver / Woofer
   18″ high‑performance carbon fiber cone driver, dual‑spider suspension, in a basket with triple ventilation channels 

• Voice Coil
   Four-layer 4″ (102 mm) voice coil 

• Magnet System
   Triple ferrite magnet motor structure 

• Amplifier
   Class D, 1,800 W RMS / 2,500 W peak 

• Enclosure Type
   Sealed (closed-box) HDF cabinet with reinforced construction to resist resonance and coloration 

• Frequency Response
   • ±10 dB: ~13 Hz to 220 Hz 
   • ±3 dB: ~20 Hz to 180 Hz 

• Low‑Pass Filter / Crossover
   Adjustable from 30 Hz to 200 Hz, with selectable slopes: 12, 24, 36, or 48 dB/octave 

• Delay / Time Alignment
   Adjustable delay from 0 to 500 ms to align with other speakers in your system 

• Inputs & Outputs
   • RCA Stereo / LFE & XLR Stereo / LFE
   • High-level (speaker) inputs
   • Matching RCA / XLR outputs for chaining or system expansion 

• DSP & Calibration
   Onboard DSP management, including AutoEQ with included mic, 6-band parametric EQ, subsonic / high-pass filtering, user presets, and app control of volume, crossover, EQ, and phase 

• Power Modes / Auto Power-On
   Selectable modes (On / Auto / Trigger). Auto power-on with sensitivity control. Compatible with 115 V – 230 V operation 

• Physical Dimensions & Weight
   • Dimensions: ~ 550 × 560 × 620 mm (W × H × D) 
   • Net Weight: ~ 55 kg 
   • Shipping Weight: ~ 62 kg 

• Finish & Design Highlights
   Black fabric grille over MDF frame, rounded cabinet edges inspired by the “Digital Drive Plus” aesthetic, 38 mm wall thickness with internal braces for structural integrity 

Use‑Case & Strengths

• Deep, Room‑Shaking Bass: With a lower bound near 13 Hz (±10 dB), the SPL‑X 18 can reproduce extremely low frequencies that you can feel in large spaces.

• High Output, Clean Control: Its 1,800 W RMS amplifier gives plenty of headroom, reducing the risk of distortion even at demanding levels.

• Precision Integration: The DSP, parametric EQ, adjustable crossover slopes, and delay controls allow seamless blending with main speakers in complex setups.

• AutoEQ Calibration: Even in acoustically challenging rooms, the included mic and AutoEQ mode help flatten and optimize the bass response for the room.

• Flexible Connectivity: Multiple input options (balanced, unbalanced, speaker-level) make it adaptable to a variety of audio systems.