Top Signal 2X HiBoost 20K Pro Cell Phone Signal Booster with 2 Antennas TS545021 (50 Ohm): Kit

Top Signal 2X HiBoost 20K Pro Cell Signal Booster 2 Antennas TS545021

Discontinued by the manufacturer
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  • Commercial/professional grade system
  • Covers up to 40,000 square feet
  • Supports up to 200 cell phone users simultaneously
  • 2 inside ultra‑thin or dome antennas
  • ½-inch carrier-grade coax cable
  • Boosts voice, text & 4G/3G data
  • Works on Verizon, AT&T, T-Mobile, Sprint & other networks


Free lifetime support
SKU: TS545021-O2TC

Product Description

This product has been discontinued. Please see HiBoost SLT.

Features of the Top Signal 2X HiBoost 20K Pro

  • Upgraded half‑inch carrier-grade coax cable and two ceiling-mounted antennas deliver double the square foot coverage of the regular Top Signal HiBoost 20K Pro system.
  • Most powerful booster for medium-sized businesses and public buildings.
  • Heavy-duty metal case with heat sink.
  • Easy-to-read backlit LCD display, with uplink/downlink/power status on one screen and optional manual settings.
  • Boosts signal for up to 200 simultaneous cellular devices.
  • Choice of inside antennas at no additional charge. (Get help picking the right antennas.)
  • Includes commercial-grade antennas and components.
  • Carrier agnostic: Works with all major U.S. and Canadian carriers.
  • Improves 4G LTE and 3G service for voice, text, and data.

The Top Signal 2X HiBoost 20K Pro is a two-antenna system designed for medium-to-large sized offices or building areas that need improved cell signal reception and have high user demands. The 20K Pro improves both voice and data to reduce dropped calls and missed emails and texts, keeping your business and employees connected with a stronger cell signal.

This kit includes two inside ultra-thin dome or regular dome antennas that send amplified signal to the phones in your building.

HiBoost LCD display and controls The Top Signal 2X HiBoost 20K Pro features a backlit LCD display and controls for gain and power.

This system doubles your coverage!

The Top Signal 2X HiBoost 20K Pro system uses the same booster as the standard kit, but includes half‑inch carrier-grade coax cable with half the signal loss of the standard 400 coax. With two ceiling-mounted ultra-thin or dome antennas, this 2X system will double the coverage area provided by your system.

Double the coverage area The ultra-low loss coax cable and two antennas in this system double your amplified cell signal coverage area.

Who is the Top Signal 2X HiBoost 20K Pro for?

  • Medium-to-large sized offices and buildings with heavy cellular user and data loads.
  • Remote locations with weak cell service.
  • Urban locations with building materials that block outside cell signal (steel, glass, concrete, plaster, etc.).
  • Areas below ground level, and other places where cell reception is poor.

Best practices: a custom-designed Top Signal 2X HiBoost 20K Pro solution

In a large building, office, or warehouse, you’ll get the best results and performance from a Top Signal 2X HiBoost 20K Pro with a custom design and professional installation.

Working with your floor plans, Powerful Signal’s design engineers will create design specifications that will allow you to use the fewest number of components to get the maximum amount of cellular coverage inside your building.

Powerful Signal’s professional installer will have knowledge of local building codes and the proper tools and experience to make sure your system is set up and configured correctly.

Call Powerful Signal at 866-912-3444 or request a free custom quote online. We’ll design a custom system that will solve your cellular reception and connectivity problems at the best possible price point. We’ve designed thousands of cell signal amplifier systems—let us create one for you!

Office floor with a Top Signal HiBoost cellular DAS system and dome antenna An office floor flooded with cellular signal from a Top Signal HiBoost amplifier and one dome antenna.

Purchasing a Top Signal 2X HiBoost 20K Pro system

Properly installing and configuring a Top Signal 2X HiBoost 20K Pro is complex task, and we strongly advise a custom solution (see Best Practices, above). If you prefer to purchase this system as a standalone product, without design and installation, the kit comes with the following components:

Top Signal HighBoost 20K Pro cell signal booster TS545011 icon Top Signal HiBoost 20K Pro cell signal amplifier Pro20‑5S‑LCD
HiBoost 12V/3A AC/DC power supply icon AC/DC adapter GM50‑120300‑F
Top Signal omnidirectional building antenna TS210471 icon Wideband outdoor omni antenna TS210471
Top Signal dome antenna TS250374 icon Choice of… Wideband indoor ultra-thin dome antenna TS250376 (×2)
Top Signal dome antenna TS250374 icon …or Wideband indoor dome antenna TS250374 (×2)
Top Signal half-inch carrier-grade coax cable 75 feet TS360075 icon 75′ half-inch carrier-grade coax cable TS360075 (×2)
Top Signal half-inch carrier-grade coax cable 50 feet TS360050 icon 50′ half-inch carrier-grade coax cable TS360050
Top Signal half-inch carrier-grade coax cable 30 feet TS360030 icon 30′ half-inch carrier-grade coax cable TS360030
Top Signal 2-way splitter TS412001 icon 2‑way splitter TS412001
Top Signal adjustable rooftop antenna mount TS430001 icon Adjustable rooftop antenna mount TS430001
Top Signal 50-ohm lightning surge protector TS450001 icon 50‑ohm lightning surge protector TS450001
HiBoost Commercial 20K Pro user manual icon HiBoost Commercial 20K Pro user manual

How the Top Signal 2X HiBoost 20K Pro works

The Top Signal 2X HiBoost 20K Pro receives the outside cell signal, amplifies it, and rebroadcasts it inside your office through two ceiling-mounted ultra-thin or dome antennas. This allows you to stay connected in areas where cell service is poor or where your office’s building materials interfere with signals from the local cell tower.

Works with all major cellular carriers

The Top Signal 2X HiBoost 20K Pro works with all major wireless carriers:

  • U.S. carriers, including Verizon, AT&T, T‑Mobile, Sprint, U.S. Cellular, and most others.
  • Canadian carriers, including Rogers, Bell Canada, Telus, Wind, and most others.

It operates on common 4G/3G cellular frequencies.

  • 700 MHz (SMH) bands 12, 13, 17.
  • 850 MHz (Cellular 850) band 5.
  • 1700/2100 MHz (AWS) band 4.
  • 1900 MHz (PCS) bands 2, 25.
Carrier logos for Verizon, AT&T, Sprint, T‑Mobile, U.S. Cellular

Which outdoor antenna should I choose?

This kit gives you the choice of a two indoor ultra-thin dome or regular dome antennas. Here are some general guidelines for selecting the right antennas.

  • A ceiling-mounted ultra-thin dome antenna works best in most circumstances. It broadcasts downward in a spherical shape (similar to the shape of a light bulb) and also has some upward signal broadcast; this makes it ideal for use between floors. The ultra-thin dome also mounts nearly flush with the ceiling, making it the least-noticeable inside antenna choice. This antenna does require access above the ceiling to pull cable and attach it to the antenna.
  • A ceiling-mounted regular dome antenna also broadcasts downward in a spherical shape. It has less upward broadcast, which makes it better for single-story buildings and top-floor installations. It also requires above-ceiling access to install.

If you’re still not certain which antenna will work best for you, please call us at 866‑912‑3444. Our technical support representatives will be happy to discuss your specific requirements and give you a recommendation based on years of professional experience.

How much area will the Top Signal 2X HiBoost 20K Pro cover?

This system comes with two ultra-thin or regular dome antennas that broadcast improved cellular signal in a spherical pattern. With strong outside cell signal (−80 dBm or greater), you can typically cover 40,000 square feet of indoor building space with 800 MHz signal. The size of the coverage area depends on many factors, including:

  • Outside cell signal strength received by the donor antenna.
  • Inside building materials. (Cellular frequencies pass through wood framing and drywall more easily than through steel and concrete.)
  • Cellular frequencies used by the carrier and the device. (Lower-frequency LTE and 800 MHz signals travel farther than higher-frequency AWS and PCS signals.)

Substandard or inadequate conditions in any of these factors will reduce your coverage area.

Powerful Signal has over a decade of experience designing and installing cellular amplification systems. Please call us at 866‐912‐3444 or contact us online, and we’ll be happy to calculate the coverage area this system will provide in your building and answer any other questions about this amplifier.

FCC Notice

For information on federal rules governing the use of consumer cell signal boosters, please see our FCC notice page.

Product Specifications

Small Office
−80 dBm (4–5 bars) outside signal:
Up to 40,000 ft² indoor coverage @ 700 MHz
−90 dBm (2–3 bars) outside signal:
Up to 24,000 ft² indoor coverage @ 700 MHz
−100 dBm (1 bar) outside signal:
Up to 5,000 ft² indoor coverage @ 700 MHz
Outside antenna:
Omnidirectional cylinder
Inside antenna:
Omnidirectional ultra-thin dome (×2) or regular dome (×2)
Cable Type:
½-inch foam polyethylene
Connector Type:
50 Ω
+70 dB max
Max Output Power (Uplink):
17–24 dBm
Max Output Power (Downlink):
12 dBm
Booster Case Material:
Signal Readout:
Backlit LCD display with adjustable uplink, downlink, & power by channel

Warranty Information

For warranty information on this product, please see our Top Signal warranty information page.

Questions & Answers