SoundTube SM400I 4" Surface Mount Speaker, 20W RMS, White, Single

SKU: SOSM400IWH MFR: SM400I-WH
Earn VIP Reward Points

Key Features

  • Enjoy crisp audio with this SoundTube surface mount speaker, perfect for background music.
  • This white speaker's broad sound coverage ensures excellent sound quality in any setting.
  • Its weather-resistant design and durable build make it ideal for indoor or outdoor use.
  • Achieve optimal sound with adjustable angles, directing audio where you need it most.
  • The theft-resistant bracket ensures secure installation of your new surface mount speaker.
  • Experience powerful sound from a compact 4" speaker, enhancing your audio setup today.
See More Product Details
Special Order?Estimated to Ship: 09/11/2025
Free Shipping

See Options

1

Protect your gear with Adorama Protect.* Learn more

1 Year

$11.99

2 Year

$19.99

3 Year

$34.99

Available to U.S. customers only.

Need help? Ask our experts.

Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Reviews about this item

Review Summary

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

SoundTube SM400i Specifications

  • System Type

    4", coaxial, surface-mount, ported (20W transformer for 25/70.7/100V or transformer bypass)

  • Impedance

    4 Ohms (Nominal)

  • Sensitivity

    At 2.83V/1m: 85.5 dB
    At 1W/1m: 82.5 dB

  • Frequency Response

    97 Hz - 22 kHz (-3 dB)
    76 Hz - 22 kHz (-10 dB)

  • Max. Program Power

    35W

  • Max. Continuous Power RMS

    20W

  • Max. SPL

    At 1m: 95.5 dB

  • Coverage Angle

    125 deg. horizontal / 165 deg. vertical (-6 dB at 2 kHz)
    75 deg. horizontal / 70 deg. vertical (-6 dB at 10 kHz)
    125 deg. horizontal / 125 deg. vertical (Ave from 2 to 10 kHz)

  • Angle of Pointability

    0 to 90 deg. horizontal

  • Directivity Factor (Q)

    3.7dB (Averaged 100 Hz - 10 kHz); 3.9dB at 2 kHz

  • Directivity Index (DI)

    4.9 dB (Averaged 100 Hz - 10 kHz); 5.9 dB at 2 kHz

  • Tap Selector

    Weather-proof, five-position tap switch with transformer bypass position

  • Frequency Driver

    Low-Frequency Driver: 102mm (4") polypropylene cone, butyl rubber surround
    High-Frequency Driver: 25mm (1") convex titanium tweeter with waveguide

  • Low Frequency Voice Coil

    25mm (1")

  • Crossover Frequency

    2.27 kHz

  • Network Type

    Low-Pass: 12 dB per octave, 2nd order
    High-Pass12 dB per octave, 2nd order

  • Enclosure Material

    Injection-molded ABS, glass fiber reinforced

  • Grille Material

    Powder-coated aluminum

  • Inputs

    Four-pin, 5.08mm Euroblock for individual or daisy chain connection

  • Regulatory

    1480 (UEAY) Approved; CE Approved

  • RoHS

    Approved

  • Dimensions (HxWxD)

    Including Bracket: 246 x 177 x 190mm (9.69 x 6.97 x 7.48")

  • Weight

    2.4kg (5.3 lbs)

  • UPC Code

    644216203307

About SoundTube SM400i

Why settle for anything less than crystal-clear audio in your professional or commercial space The SM400i 4" Surface Mount Speaker is a meticulously designed, coaxial, ported speaker that seamlessly integrates into both indoor and outdoor environments. Its low-profile surface-mount enclosure ensures a discreet presence that won't disrupt your space's aesthetic, making it an ideal choice for a variety of applications.

Crafted for consistent audio delivery, the SM400i boasts a dispersion pattern that remains uniform from 2 to 10 kHz, a feature independently verified to guarantee the best sound coverage. The included mounting hardware is not just robust but also designed with security in mind. The corrosion-resistant Stealth U-bracket ensures easy installation while providing a safeguard against theft, thanks to its innovative one-way fasteners that offer tool-free, theft-resistant security.

SoundTube's commitment to quality is evident in the custom-engineered driver and electro-acoustic network that come together to produce high-performance sound. This cost-effective surface-mount speaker design does not compromise on audio quality, offering a rich and dynamic listening experience.

The SM400i speaker is further enhanced with a five-position tap switch, including a transformer bypass position, streamlining the ordering and stocking process. For environments exposed to the elements, the included port plugs can be utilized to bolster weather resistance, ensuring your audio experience remains uninterrupted.

Engineered with professional-grade components, the SM400i is adept at delivering high-quality music and messaging. Whether it's providing background tunes or ensuring clear announcements, this speaker is well-suited for a range of venues, from retail and grocery stores to restaurants, hotels, casinos, museums, trade shows, and conference rooms.

For those seeking to enrich their audio experience with deeper bass, SoundTube offers compatible subwoofers, such as the RS1001i-II-T and SM1001p, which extend the bass response down to 41 Hz. With the SM400i 4" Surface Mount Speaker, you're choosing a blend of discreet design, robust security features, and superior sound quality that can elevate any audio setup to professional standards.

SoundTube SM400i Features

  • BroadBeam waveguide technology delivers a consistent dispersion pattern up to 10 kHz for maximum coverage area per speaker (independently verified)
  • One 4" (102mm) polypropylene woofer and one 1" (25mm) convex titanium tweeter with FerroFluid cooling
  • Includes port plugs and weatherized components for indoor and outdoor applications
  • Patented ZeroReflection enclosure technology for optimal sound reproduction and cabinet rigidity
  • Easy access, five-position selectable tap switch for 25-, 70.7- and 100V applications with transformer bypass position
  • Iridite-plated aluminum grille with protective powder-coated finish for lasting durability
  • Includes a tool-free Stealth U-bracket mounting system for fast and secure installation
  • Vertical and horizontal mounting offer precision aiming for indoor and outdoor applications
  • High quality white paint finish

Warranty Information

This product has a limited warranty of 60 months.

Key Features

  • Enjoy crisp audio with this SoundTube surface mount speaker, perfect for background music.
  • This white speaker's broad sound coverage ensures excellent sound quality in any setting.
  • Its weather-resistant design and durable build make it ideal for indoor or outdoor use.
  • Achieve optimal sound with adjustable angles, directing audio where you need it most.
  • The theft-resistant bracket ensures secure installation of your new surface mount speaker.
  • Experience powerful sound from a compact 4" speaker, enhancing your audio setup today.

What's in the box:

  • SoundTube SM400I 4 " Surface Mount Speaker
  • Corrosion and Theft-Resistant U-Bracket Mount with Safety Cable
  • Euroblock Connector
  • Paint Mask
  • Terminal Weather Boot
  • Port Plugs
  • SoundTube 5 Year Limited Warranty