SKU: 80716716068

SoundTube Entertainment RS400i 4" Coaxial Open-Ceiling Speaker (Black)

$27013.50 $30015.00
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Description

SoundTube Entertainment RS400i 4" Coaxial Open-Ceiling Speaker (Black)The black RS400i 4? Coaxial Open Ceiling Speaker from SoundTube Entertainment is a two way ported speaker with an open ceiling enclosure design that delivers effective low end response (from 76 Hz to 22 kHz @ 10 dB). The BroadBeam technology in this speaker incorporates a high frequency waveguide mated to a 1" convex titanium tweeter. The BroadBeam high frequency waveguide delivers a consistent dispersion pattern across the operating bandwidth that

The black RS400i 4? Coaxial Open-Ceiling Speaker from SoundTube Entertainment is a two-way ported speaker with an open-ceiling enclosure design that delivers effective low-end response (from 76 Hz to 22 kHz @ -10 dB). The BroadBeam technology in this speaker incorporates a high-frequency waveguide mated to a 1" convex titanium tweeter. The BroadBeam high-frequency waveguide delivers a consistent dispersion pattern across the operating bandwidth that offers optimum edge-to-edge coverage and reduced power needs.

The RS400i Speaker incorporates a low-profile grille and a five-position tap switch with transformer bypass position. It features a SpeedClamp self-locking cable grip for fast, easy, and secure installation. Designed for indoor and outdoor background to foreground SPL applications, the RS400i Speaker includes a single-point mounting system for rapid open-ceiling installations. The broad dispersion pattern of 125� and high sensitivity of 82.5 dB 1W/1m makes this speaker suitable for retail, restaurants, grocery stores, hotels, casinos, fitness centers, conference rooms, big box stores, museums, trade shows, airports, and other open-ceiling applications.

BroadBeam waveguide technology delivers a consistent dispersion pattern for maximum intelligibility and edge-to-edge coverage (up to 10 kHz, independently verified)
Features a 4" (102mm) polypropylene woofer and 1" (25mm) convex titanium tweeter with FerroFluid cooling
Weatherized components for indoor and outdoor applications
Includes UL-listed hanging hardware with adjustable galvanized steel cables and integrated SpeedClamp self-locking cable grip
Features an Euroblock connector and terminal weather boot
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
Steel grille with protective powder-coated finish for durability
Can also be surface-mounted with the AC-RS-SM5 mount bracket (not included)
UL 1480 (UEAY) approved
Black paint finish
In the Box
SoundTube Entertainment RS400i 4" Coaxial Open-Ceiling Speaker (Black)
  • Hanging Hardware
  • Euroblock Connector
  • Terminal Weather Boot
  • Limited 5-Year Warranty
System Type 4" (102 mm), coaxial, open-ceiling, ported
20 W transformer for 25/70.7/100 V or transformer bypass applications
Impedance Nominal: 4 ?

Impedance listed per IEC 60268-5 with a minimum less than 80% the nominal impedance.
Sensitivity 85.5 dB @ 2.83 V/1 m
82.5 dB @ 1 W/1 m

1 W/1 m sensitivity determined using nominal impedance.
Frequency Response 95 Hz to 20 kHz @ -3 dB
76 Hz to 22 kHz @ -10 dB

Frequency response measured in half or full space as dictated by speaker mounting configuration.
Max. Program Power 40 W

Maximum program power is 3 dB above maximum continuous power.
Max. Continuous Power RMS 20 W

Continuous power rating, EIA-426-B test.
Max. Power SPL 95.5 dB @ 1 m

Maximum output based on maximum continuous power.
Coverage Angle 125� (-6 dB @ 2 kHz)
80� (-6 dB @ 10 kHz)
125� (Averaged 2 to 10 kHz)
Directivity Factor 3.5 (Averaged 100 Hz to 10 kHz); 4.6 (2 kHz)
Directivity Index 4.2 (Averaged 100 Hz to 10 kHz); 6.6 dB (2 kHz)
Tap Selector Five-position rotary switch with transformer bypass
Transformer Taps Output at 70.7 V:
95.5 dB @ 20 W
92.5 dB @ 10 W
89.5 dB @ 5 W
86.5 dB @ 2.5 W

Output at 100 V:
95.5 dB @ 20 W
92.5 dB @ 10 W
89.5 dB @ 5 W

Output at 25 V:
86.5 dB @ 2.5 W
83.5 dB @ 1 W
80.5 dB @ 0.63 W
77.5 dB @ 0.31 W
Transducer Low-Frequency Driver: 4" (102 mm) polypropylene cone, butyl rubber surround
High-Frequency Driver: 1" (25 mm) convex titanium tweeter with waveguide
Voice Coil Low-Frequency: 1" (25 mm)
Crossover Frequency 2.3 kHz
Network Type Low & High Pass: 12 dB per octave, 2nd order
Enclosure Material Injection molded ABS, glass fiber reinforced
Grille Steel with powder-coat finish
Inputs 4-pin, 5.08 mm Euroblock for individual or daisy chain connection
Approvals UL 1480 (UEAY) and 2239
CE
RoHS
Dimensions (� x H) 7.7 x 8.8" (195.6 x 223.5 mm)
Weight 5.0 lb (2.3 kg)
Packaging Info
Package Weight 7.0 lb
Box Dimensions (LxWxH) 11.0 x 10.0 x 10.0"
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 80716716068

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4.8 ★★★★★
Based on 21 reviews
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Product Reviews
P
Verified Purchase
PPeter
Waukegan, US
★★★★★ 1
Too large. Correct size not depicted.
SIZE 10-14... Too large. Product details says "Regular" size. Returning.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
S
Verified Purchase
Stacey Lovejoy
Phoenix, US
★★★★★ 2
Too big
The one size fits all was too big for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2026
G
Verified Purchase
Glass
Fort Morgan, US
★★★★★ 5
I stay on your foot they don’t slip in your shoe
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
This is the only socks I wear Under Armour because they stay in place I wear a size 8, but they’re more comfortable with a large instead of a medium, but I wear both because I have them already and you can pull them to stretch them out a little bit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
L
Verified Purchase
Lauren
Whiting, US
★★★★★ 5
Great fit, truly doesn’t slide off heel
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium, Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
I’ve scoured all the lands looking for a no-show sock that was 1) thin, 2) quality, soft, breathable material, 3) didn’t dig into my feet/heels, 4) doesn’t shrink, and most importantly 5) stays on the back of my heel without a bulky non-slip rubber piece and these check all the boxes! Perfect for low profile women’s work shoes like Keds, etc. Not low enough for most flats though. I wear a women’s size 9.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2025
E
Verified Purchase
Elliz
Carnegie, US
★★★★★ 5
So good - I’m buying MORE.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I’m gonna give you more detail than you need about why I’m buying these socks again. I’ve been the mom of girl athletes. I’ve been a model and a fashion director. I’ve worn every brand of shoe on the planet and never found a shoe that did NOT find a vulnerable spot on my foot to rub raw. Even my beloved white Jack Purcell sneakers. With that said - I don’t like socks. I’ve bought a TON of them in 35+ years.....all major brands. They shift. They lose their shape. They get holes in them and wear out too fast. Not these. I retired this year, and knowing I’d be in sneakers a lot, traveling, sightseeing ...... I bought these 6 months ago and have worn them constantly. I’ve traveled with them. I’ve washed them in hot water and bleach. The socks are like brand new. They are exactly the right cut so as not to be seen in a basic sneaker. The little silicone patch on the heel stays put. Not once have I had to dig down into my shoe and pull the sock back up. The socks have stayed soft and EXACTLY the same as the day they were new. Like I said - I am back to buy them again. Great quality!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2021

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