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The DS18 EQX7 is a 7-band graphic equalizer / crossover made for car audio systems. It supports high-level speaker input (hi-level), has an Auto Turn-On feature, and outputs up to 8 V, allowing you to integrate it cleanly with factory radios or aftermarket setups. 

Key Benefits

• Precise tone control: 7 frequency bands (50 Hz, 125 Hz, 320 Hz, 750 Hz, 2.2 kHz, 6 kHz, 16 kHz) give detailed adjustment. 
• High-level input with auto-on: Can turn on automatically when connected to speaker-level outputs, perfect for aftermarket integration. 
• Subwoofer crossover: Built-in LPF at selectable 60/120 Hz to send sub-friendly signal. 
• Master and sub volume, fade control: Includes controls for master level, subwoofer level, and front/rear fade. 
• Durable design: Metal/aluminum housing with gold-plated RCA connectors ensures signal integrity. 

Technical Specifications

• Type of Equalizer: Graphic, 7-band 
• Frequency Bands: 50, 125, 320, 750, 2.2k, 6k, 16k Hz 
• Boost / Cut: ±12 dB (±15 dB on sub band) 
• Crossover: 1-way LPF (for sub), selectable 60/120 Hz, slope 12 dB/octave 
• Signal-to-Noise Ratio: 100 dB 
• THD: 0.005% 
• Input Sensitivity: 50 mV – 3 V 
• Input Impedance: 20 kΩ 
• Output (Preamp): 8 V, 2 kΩ output impedance 
• Headroom: 20 dB 
• Stereo Separation: 82 dB @ 1 kHz 
• Frequency Response: 10 Hz – 30 kHz 
• Operating Voltage: 11–15 V DC (negative ground) 
• Subwoofer Output: Yes, 9 V (per specs listed) 
• Controls: Master volume, sub level, fade, aux gain 
• Inputs: Main RCA, Aux RCA, Hi-level speaker input 
• Housing: Metal / Aluminum, satin black finish 
• Extra Features: Blue / red backlit selectable illumination 

Installation & Compatibility

Mountable in ½ DIN slot or under dash using included brackets. 
Sweetheart Deals

Auto Turn-On makes it ideal for use with factory radios: just connect the hi-level speaker input, and the equalizer powers on when the radio does. 

Use the subwoofer crossover to send a filtered sub signal to a dedicated sub amplifier, while other outputs can feed front and rear amps.

Because of the 8 V output, it's compatible with powerful signal chains and amplifiers, helping maintain a strong signal without clipping.

FAQS

• What does a DS18 equalizer help with in my audio system?
  It allows you to fine-tune frequencies, improving clarity, bass tightness, and overall sound balance across your entire setup.
• Do I need an equalizer if I already have a DSP?
  You may not need both, but many users pair them for extra fine control over midrange and sub-bass frequencies.
• Is the DS18 equalizer easy to install?
  Yes, it typically installs between your head unit and amplifier using RCA cables, making it a quick upgrade for better sound tuning.
• Can a DS18 equalizer fix distortion issues?
  It won’t fix bad wiring or clipping, but it can help reduce harsh highs or muddy mids by giving you precise frequency control.