Kicker 51HS8

Product Highlights:

• Featured in our article: Best Car Powered Subwoofers for 2024
• Compact powered subwoofer with 8″ woofer
• Built-in amplifier delivering 150 watts RMS
• Frequency response: 25-120 Hz for deep, clear bass
• Adjustable low-pass crossover (50-120 Hz) to match your system
• High-pass crossover set at 25 Hz for cleaner sound
• Variable phase control (0 or 180) to fine-tune sound timing
• Bass boost control (0dB to +6dB) to enhance low-end performance
• Speaker-level inputs (preamp-level input available with optional adapter, item 20646KiSL, sold separately)
• Auto turn-on switch for convenience
• Includes wired remote for easy bass level control
• Dimensions: 15.13″ W x 3.13″ H x 9.25″ D
• 1-year warranty
• 60-day return policy
• MFR # 51HS8
• Item # 20651HS8
• California customers: Please click here for your Proposition 65 WARNING

Features & Specs

General:

• Enclosure Type: Sealed
• Finish Material: Aluminum
• Grille: Metal mesh
• Connector Type: Harness
• Quick-Disconnect Plug: Yes
• Woofer Size: 8″
• Woofer Material: Not provided
• Passive Radiator: None
• Dimensions: 15-3/16″ (W) x 3-3/16″ (H) x 9-1/4″ (D)
• Parts Warranty: 1 year
• Labor Warranty: 1 year

Specifications:

• Frequency Response: 25-120 Hz
• Amplifier Power (RMS): 150 watts
• Maximum Wattage: Not provided
• Sensitivity: Not provided
• Impedance: Not provided
• Second Voice Coil Impedance: Not applicable
• Crossover Point: 50-120 Hz

The Kicker 51HS8 replaces the Kicker 11HS8.

Product Research & Features

Overview:
The Kicker Hideaway HS8 (51HS8) is a compact powered subwoofer featuring an 8″ sub and a built-in 150W RMS amplifier. Its compact size makes it ideal for installation in tight spaces, such as under seats in many vehicles.

Remote Control:
A wired remote provides convenient access to output level control. It includes an integrated mounting bracket for easy installation under the dash. The remote connects to the amplifier using the included 19.5′ cable with 3.5mm TRS plugs on both ends.

Note: The Remote Bass Control dimensions are approximately 1.65″ (W) x 1.03″ (H) x 1.27″ (D), with a depth of 3.20″ when considering the knob and cable.

Subsonic Filter:
The subwoofer comes with a built-in subsonic filter, which enhances performance by eliminating very low frequencies that the subwoofer cannot reproduce. The filter is set at 25 Hz with a 24 dB/octave slope and cannot be turned off.

Mounting:
With its slim 3-1/8″ height, the subwoofer is designed for applications with limited space, such as fitting under seats.

Controls:

• Auto Turn-on: A two-position switch for turn-on options:
  • +12V: The amplifier turns on when 12V is applied to the remote turn-on wire.
  • DC: The amplifier turns on when it detects a signal on the speaker-level input.
• Input Level: Two-position switch to select input signal strength:
  • Hi: Accepts input signals ranging from 250mV to 10V.
  • Lo: Accepts input signals from 125mV to 5V.
• Phase: Two-position switch for phase adjustment (0 or 180).
• Bass Boost: Adjustable rotary dial providing up to +6 dB boost centered at 40 Hz.
• Crossover Frequency: Rotary dial to control the low-pass filter between 50 and 120 Hz, with a 12 dB/octave slope.
• Gain: Rotary dial to adjust amplifier gain:
  • 250mV to 10V for speaker-level inputs
  • 125mV to 5V for line-level inputs

Connections:

• Harness: The Quick-Connect harness includes wires for:
  • Power: 17 feet
  • Ground: 2 feet
  • Remote turn-on: 2 feet
  • Signal input: 8 feet
  • Note: For speaker-level input, splice directly into the harness wires. For line-level input, an adapter (sold separately) is needed. The provided in-line fuse holder should be added to the power wire near the battery.
• Remote Bass: A 3.5mm mini-jack for the included wired remote control.
• Fuse: One 10-amp ATO fuse installed in the chassis.

• UPC: 713034045441
• Weight: 15
• Authorized Internet Dealer