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-   -   Need to boost output of MP3 player.... (http://www.diyaudio.com/forums/digital-source/202954-need-boost-output-mp3-player.html)

JoeDJ 21st December 2011 08:30 PM

Need to boost output of MP3 player....
 
I have a "Sandisk Sansa Clip +" which I frequently connect to my stereo sys.
The output, even though low, was adequate for the most part with my old speakers.
However, my new speakers are acoustic suspension and of course, less efficient. So, some songs are a bit low in volume with the player and amp both turned up to the max.

What it the best inexpensive thing to use to raise the output of the player?

I was thinking about a "Fiio E5" as it's simple, cheap, and battery
(rechargable) powered. Would that work?

I tried my headphone amp but it did not seem to raise the volume level even when turned up all the way.

Anway, I do not what to spend to much on something.
Any suggestions?

JoeDJ 22nd December 2011 02:19 PM

I just ordered a "FIio E6"
If it does not work adequately for this purpose, I will still have a use for it.:)

Mooly 22nd December 2011 05:57 PM

Maybe you could have altered the input sensitivity of one of the amp inputs to use with an MP3 player.

JoeDJ 22nd December 2011 11:20 PM

^ ^ ^
It's not an option as the amp only has 1 input. I'm using a seperate source switch to switch sources.

What I really need is a higher watttage amp. I'm currently runninng only 50w RMS pc. High power stereo amps seem to be a dying breed and now, high wattage seems to mean anything over 10 watts.

ChrisA 22nd December 2011 11:54 PM

Quote:

Originally Posted by JoeDJ (Post 2831110)
^ ^ ^
It's not an option as the amp only has 1 input. I'm using a seperate source switch to switch sources.

What I really need is a higher watttage amp. I'm currently runninng only 50w RMS pc. High power stereo amps seem to be a dying breed and now, high wattage seems to mean anything over 10 watts.

What you need is a preamp. This is a DIY forum so I'd suggest just a cheap op-amp set up for a gain of about 4. Power by a pair of 9V battery.

Do you have a meter that can measure RMS volts? Checks the AC volts in the input jack to see what the input level is.

Even very insensitive speakers, say 80dB/W at 1M will make a bit of noise with a 50W amp. The problem has to be the input level to the amp

KrankKall 22nd December 2011 11:59 PM

I use an inexpensive, 9 volt battery Cmoy amp with my MP3 player....works fine.

Steve

JoeDJ 23rd December 2011 12:56 AM

Quote:

Originally Posted by ChrisA (Post 2831131)
What you need is a preamp. This is a DIY forum so I'd suggest just a cheap op-amp set up for a gain of about 4. Power by a pair of 9V battery.

Do you have a meter that can measure RMS volts? Checks the AC volts in the input jack to see what the input level is.

Even very insensitive speakers, say 80dB/W at 1M will make a bit of noise with a 50W amp. The problem has to be the input level to the amp

Yeah, but I want to do more than just make noise.

Actually, all other sources are fine and I only have to turn the amp's volume up about to about 11:00 on the rotary dial.

After doing a bit of research, I found out that the Sandisk Sasna clip" does indeed have a somewhat low ouput.

Anway, for just MP3s the Fiio E6 should be adequate. Most of them were aquired during the early days of Napster and the qualty varies. :)

JoeDJ 23rd December 2011 05:42 PM

Quote:

Originally Posted by KrankKall (Post 2831136)
I use an inexpensive, 9 volt battery Cmoy amp with my MP3 player....works fine.

Steve

Actually, I forgot about the Cmoy amps. Perhaps I may stiil get or assemble one. :)

Mooly 23rd December 2011 06:00 PM

Just to wander a bit... a simple 1 transistor FET amp could actually work wonders for this. The distortion it generates would be even harmonic and may well make the MP3 files sound better to the ear.

ChrisA 24th December 2011 06:18 AM

Quote:

Originally Posted by JoeDJ (Post 2831187)
Yeah, but I want to do more than just make noise.

Actually, all other sources are fine and I only have to turn the amp's volume up about to about 11:00 on the rotary dial.

After doing a bit of research, I found out that the Sandisk Sasna clip" does indeed have a somewhat low ouput.

Like I said a preamp is required. Someone suggested a cmoy headphone amp. I think that is about the same thing I suggested.

I wonder if something as simple as a 1:2 audio transformer would work. If the amp has a high input impedance a transformer would be simple and noiseless.


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