Topping LA90 - Class AB Power Amplifier

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

Specs

• 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

• TOPPING LA90
• AC to DC power adapter
• Jumper cable
• AC cable
• User manual
• Warranty card