iBasso AMP7 Discrete Single Ended Amplifier Card
Features and technical details
iBasso AMP7 Discrete Single Ended Amplifier Card iBasso AMP7 is a single ended amp with a 3.5mm TRS output especially designed for the DX200 and DX150 music players. AMP7 is a complete new discrete circuit design that based on our four-channel architecture 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. +/-8V high voltage swing. This significantly improves dynamics and headroom resulting in a more accurate sound that is true to the recording. The transistors used on the buffer stage have a up to 2700mA output current rating which allows the AMP7 to drive IEMs and headphones that require high current with ease. When using OPAMPs to develop an amplifier it is almost impossible to achieve high voltage output and high current output especially on a portable device. Some engineers have used the TPA6120 in the buffer stage to achieve 750mA output current. However the TPA6120 has a 10ohm output impedance which isnt ideal for low impedance IEMs or headphones. So we decided to use discrete components which are usually used in desktop amplifiers to develop the AMP7 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 AMP7 card that has both high voltage and high current output and at the same time maintains low output impedance with extremely good measurements. AMP7 complements the premium performance of the DX150 and the DX200 giving you even more choices when playing the music you enjoy. Features AMP7 Single ended amp for the DX200 DX150 and the new DX220 Complete new discrete circuit design that based on iBassos four channel architecture and features both a high voltage and current output. +/-8V high voltage swing. 3.5mm TRS with line out
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