N-Audio PP400 Phono Preamp Modifications

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N-Audio PP400 Phono Preamp Modifications

Рет қаралды 4,447

Күн бұрын

Improving the performance of the N-Audio/Behringer PP400 phono preamp with a few modifications.
You can purchase this phono preamp for around $20 on ebay, aliexpress, etc.

Пікірлер: 18

@EngineeringVignettes 5 жыл бұрын

Nice mods. I have always liked the idea of taking lower cost products and beefing them up to improve performance. A comment on the music though, it seems that the least risky play time for music is 6 seconds or less now a days, to prevent flagging from the dreaded youtube music algorithm. Cheers,

@TheStuffMade 5 жыл бұрын

Thanks, yeah agree, it's often possible to make a cheap product perform quite well with just a bit of engineering. Actually in my experience it's quite common to see high end products that are poorly designed in an attempt to differentiate themselves and claim unique "technology" :) I did get struck by the youtube music copyright claim even before I release the video, but it's not a problem because they don't delete the video anymore, they just let whoever claimed the copyright take all the ad revenue. That's fine with me, I just make these videos for fun.

@Elecifun Жыл бұрын

Even though we would never be able to hear the goodness of the record played back. I think YT sucks for making you remove the audio.

@TheStuffMade Жыл бұрын

Thanks, yeah this was a bit annoying because YT originally approved the video with the music sample, but then 2-3 weeks later I got a copyright strike. I even have some early videos that got a copyright strike years after they were published.

@jameswarren1831 5 жыл бұрын

If these company’s consulted with you for a couple of hours the products in this world would have far better performance.

@TheStuffMade 5 жыл бұрын

Thanks, yeah it's a bit strange they didn't put more effort into checking a product they've probably sold 10s of thousands of. First I thought maybe someone put in the wrong components, but nope, the component values are exactly what is written on the board.

@doctordorkmeister5330 5 жыл бұрын

nice work yo

@TheStuffMade 5 жыл бұрын

Thanks

@theadamtron 3 жыл бұрын

Hello! Very keen to make this modification. Being a novice when it comes to electronics is there a list of components and what type of components would be best for the best results? Thanking you.

@fabgry4546 2 жыл бұрын

is there maybe a list of components?

@user-zc6sv5he6q Жыл бұрын

Hello, thanks for the video. I'm a beginner. Therefore, I would like to know. 1. To begin with, I want to change the 2k resistor to 1k. How much power should the resistance be? 2. Then I want to change the capacitor C4 to C11. I have a question. Can I use a 22 mf capacitor or should I definitely do 14.7? What voltage of capacitors should I use? 3. I also have a 50Hz background. I reduced it when I connected the ground. but still heard. I used a separate battery - the result is the same. Could the capacitors be faulty? which of them can be replaced? what type should they be? Sincerely, thank you. I am just learning.

@misterhilario 3 жыл бұрын

Hi. I bought a preamp phono like this, but I had a ceramic pickup and the sound was too saturated. Now I know this pre amp is for magnetic pickup. Can I make a mod on this preamp to use on my pickup?

@TheStuffMade 3 жыл бұрын

Yeah, usually ceramic cartridges have much higher output and need an amplifier with input impedance up in the mega ohm range. I haven't tried it but doing the following modification should work for changing this preamp into one that will work with ceramic cartridges, no new components required: 1. Remove the two resistors marked 47K (see 4:45 for reference) 2. Move the 2 resistors marked 1M to where the 47K used to be. 3. Short the pads where the 1M resistors used to be. 4. Remove the two capacitors marked 4.7uF/25V (3:54 for reference) This will change the gain and increase the input impedance. Hope this helps, Cheers, Jake

@doobydub8363 5 жыл бұрын

Thanks for this! How can I further mod this preamp to make it flat (non-RIAA)? Many thanks in advance.

@TheStuffMade 5 жыл бұрын

You can just remove the 4 green capacitors (2 x 3.3nF and 2 x 820pF) but what would you use it for without the RIAA equalization?

@doobydub8363 5 жыл бұрын

Many thanks! I would rip CD-4 records to digital files (at half speed). They have very high frequency modulations that get attenuated with RIAA. Thanks again!

@TheStuffMade 5 жыл бұрын

Sounds like an interesting project. You might need to lower the gain, you can do that by replacing the 2 x 1 Meg resistors with a smaller value, perhaps something around 20-100k

@doobydub8363 5 жыл бұрын

Many thanks! I will eventually materialize this project, but it will take a while.