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Digital Antenna PowerMax DA4000SBR, 3 Watt 60dB Gain Dual Band WIreless Cellular Amplifier / Repeater
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Digital Antenna PowerMax DA4000SBR, 3 Watt 60dB Gain Dual Band WIreless Cellular Amplifier / Repeater

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Currently Out of Stock
Manufacturer # 4KSBR-50U
Our Stock # MP63509218

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FeaturesSpecificationsDigital Antenna PowerMax DA4000SBR, 3 Watt 60dB Gain Dual Band WIreless Cellular Amplifier / Repeater Reviews  
PowerMax™ DA4000SBR
3 Watt 60dB Gain Dual Band Wireless Cellular Amplifier / Repeater

For use in large yachts, RVs 40' length or greater, homes and offices

You can now speak and be heard clearly on a cell phone inside marine vessels, RVs, homes and offices without feeling tied down. Digital Antennas PowerMax DA4000SBR increases signal strength and improves cellular communication without a physical connection to cell phone. This amplifier/repeater also boosts the performance and range of your cell phone up to 50 miles.

  • Wireless no connections to cell phone
  • Increases cell phone range up to 50+ miles
  • Amplifies 800 and 1900 MHz bands
  • Use multiple cell phones and carriers at the same time
  • Reduces dropped calls
  • Up to 5,000 sq. ft. coverage area¹
  • Extends the life of your cell phone battery

Stay Connected ... Wirelessly!
The DA4000SBR requires no physical connection to your phone. How does this work? An outside antenna receives the signal from the cell tower, the signal is amplified by the DA4000SBR unit and repeated to your cell phone through the inside antenna. No physical connection to your phone means you now have the freedom to walk around while talking on your phone. This technology even allows clean and clear wireless functioning of multiple cell phones operating on 800 and 1900MHz bands simultaneously, with a coverage area up to 5,000 square feet.¹

¹Coverage area is based upon an outside signal strength of -70dB. As outside signal strength decreases, coverage area decreases. For poor outside signal areas or for increased interior coverage, use a yagi (directional) antenna.

Complete Systems are Easy to Install
The DA4000SBR is sold as a complete system with everything you need for no hassle installation on your yacht, or inside your RV, home or office. This innovative design offers patent pending Dynamic Variable Gain control and amplification of transmit and receive signals. A minimum separation of 40 is required between the inside and outside antennas*. The DA4000SBR is the only FCC approved amplifier/repeater for use with all cell carriers in the USA and Canada.

DA4000SBR can be used with all 800 and 1900 MHz digital cell phones and tri-mode phones operating on CDMA, TDMA, PCS, GSM850/1900, GPRS and AMPS.

DA4KSBR-50U - For Large Yachts and RVs, Home, Office
System Includes:
  • DA4000SBR 3W dual band 60dB gain wireless amplifier/repeater unit
  • 12VDC power converter
  • 110VAC power supply
  • Inside omni-directional antenna with 6' cable²
  • Outside 9dB gain omni-directional dual band cell antenna and mounting bracket*
  • 50' PowerMax DA340 ULTRA low loss coaxial cable and factory attached connectors

²Requires a minimum separation distance of 40' or more, and wall/roof/bulkhead structures between inside and outside antennas (see model DA4000MR which requires less antenna separation).


The DA4KSBR-50U system is not for use in cars, open console boats, RVs less than 40' length or in open air without a roof/wall structure. For answers on installation questions, visit our Product Frequently Asked Questions page.

Optional: May also be used with Digital Antenna's 500, 800 or 900 Series 9dB gain premium quality cellular antenna line (antenna separation requirements must always be met).

To mount the amplifier/repeater's outside antenna on a standard 1"x14 marine mount, use model F114 1"x14 double female ferrule.

General Specifications:
  • FCC approved, FCC ID: PZODA4000
    Exclusive Online Only products are products with a catalog number beginning with the letters MP or EP. Example: MP0021. We are committed to shipping your order as quickly as possible. In the event that you wish to cancel this order, the cancellation must take place within 2 hours from the time the order was placed. We are unable to cancel your order after this time period because your order is already in the fulfillment process. Online Only products require a Return Merchandise Authorization (RMA) from customer service department. Click Here for Complete Return and Exchange Policies for Exclusive Online Products

    This item is a Limited Special/Online Exclusive Consumer Electronics Product or Heavy / Oversized product and incurs a shipping charge:

    Some lighter weight items such as antennas or fishing rods may incur shipping charges due to their irregular or oversized dimensions.

    Ground, 3 - 7 Business Days2nd Business DayNext Business Day
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  • Manufacturer: Kershaw Knives
  • Manufacturer Part Number: 9500-7
  • Manufacturer Website Address: KERSHAWKNIVES
  • Dimensions: " Height x " Width x " Depth
  • Standard Warranty: 0Year(s)
  • Digital Antenna PowerMax DA4000SBR, 3 Watt 60dB Gain Dual Band WIreless Cellular Amplifier / Repeater Reviews


    by PowerReviews
    Digital Antenna PowerMax DA4000SBR, 3 Watt 60dB Gain Dual Band WIreless Cellular Amplifier / Repeater

    (based on 1 review)

    Reviewed by 1 customer

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    I would buy this product again.

    By Chief

    from Central City, AR 72941

    About Me Power User

    Verified Buyer


    • Easy To Set Up
    • Easy To Use
    • Quality Construction


    • None

    Best Uses

    • Solved our problem

    Comments about Digital Antenna PowerMax DA4000SBR, 3 Watt 60dB Gain Dual Band WIreless Cellular Amplifier / Repeater:

    We are a police department and our facility is a metal building. Our cell phones could hardly get out and hardly receive calls. So, now we can operate our cell phones in a normal manner. Before, we had to go outside the building to get a good signal. The only regret I have is that I did not see your advertisement sooner.

    Thank you,

    Chief Paul Rivaldo

    • Primary use:
    • Business

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