The SoundTube SM400i is a premium 4" surface-mount speaker engineered for clear, high-output audio in retail spaces, restaurants, corporate buildings, hospitality venues, and anywhere professional sound reinforcement is needed. With SoundTube’s trusted engineering and high-efficiency design, the SM400i delivers detailed music reproduction, smooth vocal clarity, and wide dispersion—all in a compact, architecturally friendly enclosure.

SoundTube SM400i Key Features

  • 4" Polypropylene Woofer + 0.75" Silk-Dome Tweeter
    Provides balanced, full-range performance with excellent speech intelligibility.

  • BroadBeam® Waveguide Technology
    Ensures even sound coverage across wide listening areas, reducing hot spots and dead zones.

  • High-Efficiency Transformer
    Supports 25 V / 70.7 V / 100 V distributed audio systems with multiple tap settings, plus an 8-ohm bypass for low-impedance applications.

  • Weather-Resistant Construction
    UV-rated, sealed enclosure ideal for indoor or covered outdoor installations.

  • Easy Install Mounting System
    Includes a low-profile Stealth™ bracket for fast, secure mounts while maintaining a clean aesthetic.

  • Multiple Color Options
    Available in black or white, with paintable grille to match any décor.

Soundtube SM400i Specifications

Acoustic

  • Frequency Response: 85 Hz – 22 kHz

  • Sensitivity: ~90 dB (1W/1m)

  • Maximum SPL: ~102 dB

  • Coverage Pattern: 120° (with BroadBeam®)

Drivers

  • LF: 4" polypropylene woofer

  • HF: 0.75" silk-dome tweeter

Power / Impedance

  • Transformer Taps: 25 V, 70.7 V, 100 V

  • Tap Settings (typical): 1.5W / 3W / 6W / 12W / 25W

  • Low-Z Mode: 8 ohm bypass

Physical

  • Mounting: Stealth™ bracket

  • Enclosure Material: ABS, UV-resistant

  • Grille: Powder-coated steel (paintable)

  • Colors: Black or White

Dimensions / Weight

  • Typical for category (exact numbers vary by revision—can add if needed)

Included Accessories

  • Stealth mounting bracket

  • Safety cable

  • Euroblock connector

  • Grille

Applications

  • Retail and grocery stores

  • Restaurants, cafés, lounges

  • Corporate meeting spaces

  • Lobbies and hallways

  • Hospitality venues

  • Educational facilities

  • Fitness centers

  • Background music and paging systems

The SoundTube SM400i is a professional 4" surface-mount loudspeaker offering wide coverage, rich sound, and reliable performance for commercial audio installations. With BroadBeam® technology, transformer versatility, and a modern low-profile design, it delivers exceptional audio quality for background music and paging in any environment.

 

List price: $292.00
Price: $292.00
SKU: SM400I
Catalog: 
Surface, Box & Hanging Speakers
Brand: 
Soundtube
Dimensions: 10 in × 12 in × 10 in
Weight: 8 lb