With the A50s, Topping offers a high quality headphone amplifier and sedentary preamplifier combo, integrating both balanced and unbalanced connections.
Conversely, if headphones are connected to the 6.35mm or 4.4mm jack outputs, the unit instantly switches to headphone amplifier function.1ON/OFF SwitchGain selector2Gain indicator3Jack 6.35mm single-ended headphone output4Jack 4.4mm balanced headphone output 5Volume button6Right channel RCA analog input7Left channel RCA analog input8Right channel RCA preamp output9Left channel RCA preamp output10Power connector.
In preamplification mode, the output impedance is only 20, ensuring compatibility with many devices.
Automatic switchingWhen the A50s is not connected to headphones or earphones, it automatically switches to preamplifier mode, with the amplified signal outputting through the RCA output on the rear panel.
Once again, this setting, coupled with an ultra-low noise of 0.3Vrms, allows the A50s to adapt to both sensitive EMIs and headphones requiring a high energy input.
An excellent preamplifierIf the main function of the A50s is headphone amplification, it is also a very good preamplifier with excellent performance.
It can therefore be used with unbalanced headphones on its 6.35mm jack output, or with balanced headphones on its 4.4mm jack output.
Adjustable gainThe Topping amplifier offers a gain setting of 0dB or 6dB in unbalanced mode, or 6dB and 12dB in balanced mode.
Extremely robust, it also provides excellent heat dissipation to effectively remove heat from the power supply and AOPs of the unit.
BalancedSingle-endedAlthough the A50s has only an unbalanced input, it has a balanced amplifier circuit.
An ultra-low noise level of 0.3V, a dynamic range of 144dB and the absence of background noise also allow the A50s to easily power the most sensitive EMIs.
Robust aluminium housingThe components of the A50s are integrated in a solid Aluminium frame, CNC machined with high precision.
A high output current allows the amplifier to accompany all types of headphones.
Its hybrid current/voltage architecture associated with UHGF (Ultra High Gain Feedback) technology offers excellent DC and AC performance.
The A50s is also designed to be versatile, capable of adapting to the vast majority of headphones and earphones on the market, including demanding models.
Ultra high performance NFCA moduleAt the heart of the A50s is an NFCA (Nested Feedback Composite Amplifier) module, identical to the one used in the brand\'s flagship, the A90.
Its optimized circuits, based on very good audio components, allow a precise, detailed and musical restitution.
With the A50s, Topping offers a high quality headphone amplifier and sedentary preamplifier combo, integrating both balanced and unbalanced connections
