Audio amplifier! Non-ear amplifier, need to be used with passive speakers!

The latest audiophile small amplifier, an affordable light luxury HiFi desktop amplifier.

This small amplifier is based on the previous open source Class D amplifier product upgraded again, PCB using 2u sunken gold board, the core amplifier chip has also been upgraded. At the same time, the filter capacitor is upgraded to a special Japanese Nichicon fever capacitor, coupling capacitor for the Weimar MKS film capacitors, but also CNC custom-made special heat sink. The power supply is still with a large joint custom research and development of low-noise high-power audio power supply, is not a miscellaneous power supply can be compared.

Design concept.
Doing audio equipment is definitely not that with what high-end chips will definitely come out good sound, the design of the circuit, PCB layout, alignment and so on each link will affect the final effect. These years also designed a lot of audio equipment, ear amplifiers, amplifiers, sound cards, microphones and so on, but also gradually have some experience, repeatedly sculpted and constantly pushed to rebuild, in the experiment and good sound encounter, is definitely a very exciting thing.

The size of this amplifier can be said to be very small, 11cm * 7cm * 3cm, the class D small steel gun characteristics are well demonstrated. The shell, panel and internal heat sink are all made of aluminum alloy CNC precision carving process, basically regardless of the cost.

This amplifier has a good sound in addition to another, that is, headphones or audio automatic switching function. There is a 3.5mm audio output interface on the front panel, which is used to connect the headphones, when the user will insert their headphones immediately after the audio playback is muted, the sound is directly taken over by the headphones, to do a seamless switch between headphones and audio playback.

In order to ensure the musical expressiveness at the same time focus on the appearance of the design, so that the design of things to become an artifact has been my pursuit, so meticulous layout, repeatedly carved.
Specific parameters are
Operating voltage: 24V.
Static current: 40mA@24V.
Output impedance: 4~8 ohms.
Power: 33W for the left channel + 33W for the right channel; (50W + 50W using 100W power supply)
Gain: 30dB.
Frequency response: 10Hz-50KHz-3db.
Distortion: 0.01% THD
input interface: 3.5mm audio interface.
Output interface: 2EDG5.08 terminals (connected to the audio); 3.5mm audio interface (connected to headphones).
Dimensions: length 125mm (counting potentiometer knob), width 69mm, height 30mm.

Features.
Unique headphones, audio automatic switching circuit. After inserting headphones audio automatically mute, headphones directly connected to the audio source, without any amplifier, filtering, etc. in the middle.
Circuit design using a mature, stable and reliable Class D program, circuit wiring meticulous and careful, the advantages of Class D to the extreme. The sound is delicate and warm, smooth and burr-free, with strong bass and lush treble.
Product list.
1, one amplifier host.
2, a special audio power supply (input voltage AC220V, output voltage DC24V, maximum current 2.75A).
3, with a shielded 3.5mm audio pair of recording cable.