External DSP Using Pioneer KEH-P9750

The Pioneer KEH-P9750 is a hi-end car cassette player built around 90's. The audio features in this head unit is beyond of it's era. It has built-in sound processor, 6 channel time alignment, 13 band equalizer and auto EQ by using the mic for the sound adjustment. It also included internal power amplifier rated 4 x 45 watt which enough for simple car audio setup.

I will not using the cassette player on this Pioneer KEH-P9750. It is outdated for today media standard. I also never play music from the cassette anymore.

This head unit is great. I don't want to waste this head unit consider so many advance audio features on it. That is why I will using this Pioneer KEH-P9750 on my car as an external DSP to adjust and tailored the overall sound.

Tripath TK2050 Amplifier Updates

It is been a while since I built this Tripath TK2050 amplifier and I using this amplifier ever since.  As usual, I still curious with my own built and sometimes I need to open it up again. It is sometimes relaxing for me to see my own built, but others than that, I always try to find any parts need to be upgrade.

 

Audio Technica ATH-M50x Limited Edition With The CMOY Headphone Amplifier

Audio Technica is the most well known brand for their headphones. Most of their headphones are also use by professional application related to audio. This is very iconic brand and especially for the ATH-M50x, this good looking headphone is really catch my attention.

In this weekend, I have a chance to test the ATH-M50x Limited Edition version. I will connect it with my new build LME49720NA CMOY headphone amplifier.

DIY LME49720NA Portable CMOY Headphone Amplifier

It was on Friday and heavy rain outside.

As usual in that condition, the traffic jam from my office to home will be very high. So I decided to go to my favorite electronic parts shop nearby instead directly went home.

Firstly, I don't have any plan to buy anything. I just came there to have a little chat with the owner. But things changes when I saw this high quality PCB of the headphones amplifier. I certainly want to make one for myself.