Is it necessary to add more than 2000 amps to AKG K545?

This is a direct push earphone. Although IPC is fully driven, it is similar. I think putting the money you put in the player is king. Binding doesn't mean much.

The amplifier plays the role of amplifying the analog signal power. Not all headphones will be improved, but many headphones with low resistance and high sensitivity will reduce the sound quality. This is because most power amplifiers are designed for high-resistance headphones, and the impedance of low-resistance headphones does not match, and the sound is louder at most, which will also lead to small volume deviation and increased distortion. In addition, if the low-resistance earphone must be worn on the ear, what is needed at this time is a large current drive. This is also the reason why the power amplifier price of K70 1 (only 32 Euros) is basically several times that of 70 1.

When your existing equipment is enough to drive headphones, replacing the power amplifier can play a positive role, one is to reduce distortion, and the other is to change the timbre. But this kind of distortion is low, and the tuned amplifier is not cheap. Moreover, IPC has no line output (imod is just a joke), and the amplifier will only amplify and worsen the analog signal output by the existing amplifier circuit. With this investment, it is better to replace IPC with lossless bricks, such as DX 100, 90 1, C4 and so on.