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Direct-Connect In-Line Amplifier w/AC, +20dB - 811200

Product subtitle:

Dual-band M2M / In-Line amplifier for use as direct-connection amplifier or as extra pre-amp booster





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Friendly Wilson Amplifiers Message: This model has been discontinued and no longer for sale.

Wilson 811200 Direct-Connect In-Line Amplifier w/ AC Power Supply is a dual band (850/1900 Mhz) Direct-Connect amplifier. Also known as Pre-Amps, Wilson 811200 amplify incoming signal to the signal booster. Direct Connection amplifiers require that your cell phone or data card be directly wired to the amplifier, via a phone specific adapter (sold separately), providing maximum signal performance in low-signal areas, particularly rural and remote locations.  It can be used as a pre-amplifier (pre-amp) in-line booster in complete stand-alone systems to add +20dB gain to the existing system. As pre-amp it will be installed just before the main amplifier (between the outdoor antenna and the amplifier unit).

Direct connect amplifiers can be used both in fixed and mobile applications - including buildings, cars, boats, trucks, RV's etc. and need to be connected to an external antenna (not included).  In addition to phones and data cards, this type of amplifier makes it the ideal choice for M2M applications, where the amplifier can be directly hooked up to a modem.  Includes A/C power adapter.

This product replaces Wilson 812201 Direct Connection Amplifier.  If you are looking for a field-proven ready-to-install kit, check out the Wilson 811200-K.


  • Multiple use signal boosters can be used for building, mobile, marine or M2M applications


  • Supports all carriers that transmit at 824-894 and 1850-1990 MHz frequency bands only and works on all generations of CDMA, TDMA, GSM, and 3G
  • Works with 50 Ohm antennas and accessories
  • Does not support Nextel/iDen, Verizon 4G LTE, and AT&T 4G LTE/AWS
  • Contact us before you purchase this item if you are unsure

Package Includes:

  • Wilson 811200 Direct Connection +20dB gain Dual Band Amplifier
  • 12V AC power supply
  • 6ft inside antenna extension cable

Product Features:

  • Connects directly to device
  • For Building, Mobile, Marine or M2M applications
  • Requires phone-specific adapter (not included)
  • Requires Outside Antenna (not included)
  • Greatly reduces dropped calls
  • Extends signal range
  • Increases data rates
  • Direct-Connect Amp: NO Oscillation
  • Overload protection circuit
  • Protects cell towers from being overloaded
  • Amplifies signal both to and from cell towers
  • Maximum gain within cellular standards
  • Extends battery life
  • Maximum 3000 milliwatts output power
  • FCC and IC approved


Technical Specifications

Frequency  824-894 MHz / 1850-1990 MHz    
Gain  10 dB / 14 dB 
Max Uplink Power  2240 mw / 930 mw
Max Downlink Power     0 dBm / 0 dBm 
Noise Figure  3.5 dB nominal 
Flatness  ±2 dB
Isolation  >90 dB
Power Requirements     12 V, 0.5-1.5 A max 
Connectors  FME Male 50 ohm   
Dimensions  5.4 x 4.3 x 1.4 inches / 14.0 x 10.8 x 3.5 cm   
Weight  1.32 lbs / 0.6 kg
Documentation  Installation Guide












This Direct-Connect amplifier can be used for M2M installations or as a Pre-Amp in-line booster. A Pre-Amp Booster is added into a complete, stand-alone building amplifier system, between outdoor antenna and the amplifier unit (close to the amplifier).

Please follow included installation instructions.

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