Modifying input sensitivity on a TK2050

[scream681]

Hello,

First of all I must state that I'm not really an expert when it comes to sound and amplification. I have basic soldering skills though. The reason I got into it is because I'm building portable BoomBoxes for Streetdancing. I been on this forum quite a lot of times and got a lot of useful information from different posts. You all have my thanks for that. 🙂

I built a couple of boomboex before using car stereos, but those were power hungry and had only decent sound.

My first try at building a decent portable Boombox wit ha T-Amp includes a SMSL TA2021 amp, a couple of Kenwood car speakers, and a 4.5AH lead- acid battery. It turned out much better than I expected, the sound quality is more than you need when you are outdoors and the volume is pretty loud. Plus the battery life is ridiculously long, I run the amp at full volume for 5 hours and the battery barely gets discharged.

Here is a pic for anyone who is interested:

An externally hosted image should be here but it was not working when we last tested it.

I got really excited about the T-Amps, so I decided to make something louder. So I ordered the T2 amp from Hifimediy.
Hifimediy T2

The amp arrived and I got everything to work, the only problem was that using the same input source and same speakers, it was producing the same volume of sound as the TA2021 amp.

After contacting Hifimediy they replied with this:

Our amps are configured for 1.5V inputs (normal line level, ipod etc will output lower levels)
The T2 will be able to product more power than the ta2021 if you match it with its input.
You might need a preamp, or to modify the input sensitivity (requires changing SMD resistors - not for beginners) on the T2, in case your source does not output 1.5V rms level signal.

I'm usually using mp3 players or a Netbook as a playback device, so I guess its not enough to make the amp produce its full volume. The problem is, if I cant make it play quite louder than the TA2021, there is no point using is as an amp since it already requires twice the battery load, and will probably last less.

Is modifying the input sensitivity going to solve the problem? If yes, which resistors should I replace and with what?

Thanks in advance, Nick.

 

[gychang]

Hello,

First of all I must state that I'm not really an expert when it comes to sound and amplification. I have basic soldering skills though. The reason I got into it is because I'm building portable BoomBoxes for Streetdancing. I been on this forum quite a lot of times and got a lot of useful information from different posts. You all have my thanks for that. 🙂

I built a couple of boomboex before using car stereos, but those were power hungry and had only decent sound.

My first try at building a decent portable Boombox wit ha T-Amp includes a SMSL TA2021 amp, a couple of Kenwood car speakers, and a 4.5AH lead- acid battery. It turned out much better than I expected, the sound quality is more than you need when you are outdoors and the volume is pretty loud. Plus the battery life is ridiculously long, I run the amp at full volume for 5 hours and the battery barely gets discharged.

Here is a pic for anyone who is interested:

An externally hosted image should be here but it was not working when we last tested it.

I got really excited about the T-Amps, so I decided to make something louder. So I ordered the T2 amp from Hifimediy.
Hifimediy T2

The amp arrived and I got everything to work, the only problem was that using the same input source and same speakers, it was producing the same volume of sound as the TA2021 amp.

After contacting Hifimediy they replied with this:


I'm usually using mp3 players or a Netbook as a playback device, so I guess its not enough to make the amp produce its full volume. The problem is, if I cant make it play quite louder than the TA2021, there is no point using is as an amp since it already requires twice the battery load, and will probably last less.

Is modifying the input sensitivity going to solve the problem? If yes, which resistors should I replace and with what?

Thanks in advance, Nick.

I know this is OLD thread but I have the same problem, anyone know how resistors (SMD) R3, R5 40K ohms are ordered digikey?