iBasso Audio AMP changing video
The team at earphonia.com are very happy with the DX200 – Silver award winner of our 2018 Best Dap/Dac awards
This versatile digital audio player, has the option for replaceable Amplifier sections.
So we thought we would provide a quick video guide for our followers to show how easy and quick it is to change the Amps.
earphonia.com iBasso Audio AMP Change Video :
The AMP8 is a Discrete Balanced Amplifier Card and is the earphonia.com preferred set up for the DX200
Specifications:
AMP – Output Voltage: 6.2Vrms
Frequency Response: 15Hz-45KH2 +/- 0.3dB
S/N: 125dB
THD+N= 0.0002396, -113dB (no [email protected])
0.0002391, —1l3dB ([email protected])
Output Impedance: 0.380hm
DNR: 125dB
Crosstalk: —120dB
Overview:
When using OPAMPs to develop an amplifier, it is almost impossible to achieve high voltage output and high current output, especially, on a portable devices. Some engineers
have used the TPA6120 on the buffer stage to achieve 750mA output current. However, it has 10ohm output impedance, which isn’t ideal for low impedance IEMs or headphones.
So, we decided to use discrete components which are usually used on desktop amplifiers to develop the AMP8 but the development process is much more difficult when
using discrete components. After a long development period and with our final design, we present the AM P8 card that has both high voltage and high current output and at
the same time maintains low output impedance with extremely good measurements. AMP8 complements the premium performance of the DX150 and the DX200, giving
you even more choices when playing the music you enjoy.
Features
+/-8V high voltage swing. This significantly improves dynamics and headroom, resulting in a more accurate sound that is true to the recording.
AMP8 is a complete new discrete circuit design that is dedicated to the DX150/DX200 and features both a high voltage and current output. High current output is very useful for
low impedance multi drivers in-ear monitors.
Low VCE transistors are utilized and are manually sorted and paired, providing better consistency and linearity. The low VCE also expands the linearity range.
The transistors used on the buffer stage have a 2700mAh output current rating, which allows the AMP8 to drive IEMs and headphones that require high current with ease.
A Pentaconn 4.4mm balanced output port is used. The large double contact area of this socket contact lowers resistance and allows better current transmission.
