Topping LA90

Sale price$899.00

Topping LA90 - Class AB Power Amplifier

topping LA90 header photo

topping la90 specifications

Topping LA90 linear amp description

topping la90 quick descriptions

topping LA case design

topping LA90 distortion figures

topping la90 inputs

topping la90 gain settings

topping la90 in mono or stereo mode

using pre amplifier to control la90 in mono mode

power specs in mono vs stereo mode for la90

diagram of cable connection in mono mode

showing power and inputs on la90 rear panel

picture with pre 90 and a90

pre90 stacked on top of a90 in mono configuration

picture with topping a90 discrete used as preamp for la90 in mono with speakers

la90 in different configurations of topping products

la90 specifications sheet

la90 package contents

The comeback of the linear amplifier

The TOPPING LA90 is breaking new ground. With near-perfect square wave performance and the lowest noise performance of existing power amplifiers, it reaches a new level of accuracy and performance that will leave you speechless.

Rock solid 

A high-precision CNC-machined all-aluminum housing provides the LA90 with extreme protection. A built-in heat sink provides reliable and fast heat dissipation for the amplifier circuit.

Low distortion, outstanding power

The LA90 has a THD+N of 0.00007% @8Ω10W–which is as low as a top-notch DAC. This spells more accurate reproduction of music. The LA90 has a very wide working range with low distortion under load. Even in the commonly used 4Ω load 1W-60W output and 8Ω load 1W-40W output, the LA90 keeps distortion around 0.0001%.

Mono and stereo modes

The LA90 can be configured in a common stereo two-channel mode or in a high-power mono mode.

Product highlights

  • 110W x 2 @4Ω 
  • 0.00007% THD+N
  • 140dB SNR
  • 2-step gain setting
  • 3 x XLR / TRS inputs


  • THD+N @1kHz (A-wt)
    • Stereo: 
      • <0.00009% @4Ω 5W
      • <0.00009% @8Ω 5W 
    • Mono: 
      • <0.0001% @8Ω 5W  
  • THD+N @No-wt (90kBw) 
    • Stereo:
      • <0.0017% @4Ω 5W 
      • <0.0009% @8Ω 5W 
    • Mono:
      • <0.0012% @8Ω 5W 
  • SNR @A-wt 
    • Stereo: 140dB
    • Mono: 142dB
  • Dynamic range @A-wt 
    • Stereo: 140dB
    • Mono: 142dB
  • Frequency response
    • Stereo
      • 20Hz - 40kHz (±0.2dB)
      • 10Hz - 100kHz (±1dB)
    • Mono
      • 20Hz - 40kHz (0.2dB±)
      • 10Hz - 100kHz (±1.0dB)
  • Output level
    • Stereo
      • 51Vpp @4Ω 
      • 58Vpp @4Ω 
    • Mono
      • 98Vpp @8Ω 
  • Noise @A-wt 
    • Stereo:
      • <2.0uVrms @G=L
      • <3.5Vrms @G=H 
    • Mono
      • <2.8uVrms @G=L 
      • <5.0uVrms @G=H 
  • Channel crosstalk: -138dB
  • Input sensitivity 
    • Stereo: 
      • 6.9Vrms @G=L 
      • 2.2Vrms @G=H
    • Mono
      • 15.5dB @G=L 
      • 25.2dB @G=H 
  • Gain
    • Stereo
      • 9.5dB @G=L 
      • 19.2dB @G=H
    • Mono
      • 15.5dB @G=L 
      • 25.2dB @G=H
  • Channel imbalance: 0.2dB
  • Output impedance
    • Stereo: <3mΩ
    • Mono: <5mΩ
  • Output power
    • Stereo
      • 110W x 2 @4Ω THD+N<10%
      • 90W x 2 @4Ω THD+N<1%
      • 65W x 2 @8Ω THD+N<10%
      • 50W x 2 @8Ω THD+N<1%
    • Mono
      • 220W x 1 @8Ω THD+N<10%
      • 180W x 1 @8Ω THD+N<1%
  • Load impedance
    • Stereo: ≥4Ω
    • Mono: ≥8Ω

What’s included

  • AC to DC power adapter
  • Jumper cable
  • AC cable
  • User manual
  • Warranty card