KSA5-mini Class A Headphone Amplifier Power Amplifier Small Headphone Amp (Main Unit + Power Adapter)

KSA5-mini Class A Headphone Amplifier Power Amplifier Small Headphone Amp (Main Unit + Power Adapter)

Read before Purchasing:
It is a DIY product, so there may be traces of assembly on the product. Users who have strict requirements for appearance should think twice before purchasing.

Description:
KSA5-mini is a DC servo headphone amplifier debugged with instrumentation design ideas. Based on the excellent design of the original KSA5, we replaced the bulky in-line components with chip components and re-optimized the circuit. Not only have we reduced the size of the headphone amplifier to 1/10 the size of the original, but we have also significantly reduced the cost.

The dimensions of the amplifier are 120mm x 160mm x 40mm/4.7" x 6.3" x 1.6".

Introduction to KSA5 Circuit:
Designed by analog circuit guru Kelvin Gilmore, the Krell KSA5 headphone amplification circuit uses a class A DC servo architecture. There is no coupling capacitor used from audio input to audio output, and a very wide frequency response of high and low frequencies can be achieved. At the same time, it directly eliminates the effects of coupling condenser coloration on traditional headphone amplifiers, allowing listeners to feel the most authentic sound.

The output stage features two transistors connected in parallel, and the push stage with four transistors connected in parallel, ensuring a continuous flow of power. The input stage uses JFET transistors, which have extremely high input impedance and sensitivity, and can accurately amplify every trace of sound.

The classic master circuit and modern design optimization makes Hi-end headphone amplifier within reach.




Effective frequency response is 55Hz-400KHz, and the response is smooth in the audible frequency range of the human ear.


The maximum output amplitude is 14Vpp. With a large dynamic output and a large swing, it can handle high-impedance headphones with ease.


Output current amplitude is 1260mA at 20Hz and 8 ohm load. It can also be used with headphones with low impedance and relatively low sensitivity. In measurements, no floor noise is present when the volume is set to its highest level.


Other Features:
* You can use any power adapter with a 12-15V output and greater than 2A to power it.
* On-board high-performance microcontroller, real-time voltage monitoring and control RGB LED display status.
* The whole amplifier comes with an integrated heat dissipation design of PCB and shell. Heat is conducted along the bottom of the PCB to the housing.

Package Included:
* 1 x Headphone amp
* 1 x Power adapter

Packaging Details:
* Weight: 2kg

Note:
* There is no difference between the circuit of the new version and the old version, only the shell has been changed and the control single-chip microcomputer has been replaced.