When we develop a new product we take the carpenter's adage "measure twice, cut once" to the extreme. Each new model is tested, improved and re-tested under worst-case conditions. It comes to market only when it is a finished product that's ready to stand the test of time. In fact, we don't really know how long our amplifiers last because people write to thank us because the Parasound amp they purchased in the mid-'80s still works perfectly 30 years later. Everything we do is customer-centric. Parasound was founded not just on engineering expertise, but also 15 years of experience in retail audio. It shows in how we value our customers, from our product development process to our pre- and after- sale support. It may be a cliché, but we treat our customers the way we would like to be treated by the people we purchase from. If a product ever does need service, we're accessible. Our entire support team is located at our San Francisco headquarters. Call us — we'll pick up. When you are a Parasound customer, we will keep you a satisfied Parasound customer.

A 51 Amplifier Halo

a51 front silver


  • Circuitry designed by legendary John Curl
  • THX Ultra2 certified
  • High bias Class A/AB operation
  • Balanced inputs with discrete circuits and XLR connectors
  • Direct Coupled - no capacitors or inductors in signal path
  • Complementary MOSFET driver stage and JFET input stage
  • 40 beta-matched 15 amp, 60 MHz bipolar output transistors
  • 2.2 kVA encapsulated toroid power transformer with independent
  • secondary windings for each channel
  • 164,000 μF power supply filter capacitance
  • DC Servo and relay protection circuits
  • AC present, channel status, high temperature indicators
  • Heavy-duty 24k gold-plated 5-way speaker terminals
  • Gold-plated RCA input jacks; ground lift switch
  • Auto turn-on by 12v trigger or audio signal
  • 4u Chassis, carry handles, rack mounting adapter included

P 7 7.1 Channel Preamplifier Halo

p7 front black

  • Input/Outputs: 
    - 2 Multi-channel (7.1) inputs for surround sound movies and music 
    - 7 Stereo inputs (one balanced XLR input) 
    - 1 MM or MC phono input 
    - Front panel input jack for portable MP3 player 
    - Unbalanced RCA and balanced XLR 7.1 outputs 
    - Subwoofer output with analog bass management 
    - Serial port for RS-232 control 
    - Rear panel IR input jack 
    - 3 different 12v trigger outputs 
    - High quality headphone output
  • Software Features: 
    - Custom input naming for all inputs 
    - Theater bypass mode for connecting a digital surround receiver 
    - Source input level matching 
    - Headphone level offset 
    - Analog bass management for stereo inputs 
    - Links to Parasound Zhd HDMI selector (does not decode audio)
  • Other Features: 
    - Relay-switched input select, mute & tone control engage/bypass 
    - Full-featured remote control 
    - Bass and Treble adjustable by remote 
    - Tone controls engage/bypass by remote 
    - Left/Right balance adjust by remote 
    - Front/Rear balance adjust by remote 
    - Subwoofer output level trim by remote 
    - 20 dB partial mute and full mute by remote 
    - 5 brightness settings for front panel display 
    - Three 12V trigger outputs for 3 different functions 
    - 12V trigger can be activated by remote control 
    - Rack mount kit available, (2 rack spaces without feet)


Please feel free to contact us for any queries or price requests on our entire product range!!

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