help in building my portable boombox (here in philippines)

[NoobSaibot]

good day sir, im a noob about making this audio stuff but im trying my best to learn.

i recently bought some speakers here in our country with these specs:

one 6" JBL subwoofer 650w max, two 4" konzert midrange 120w max and a two small tweeters.

i already made a box same as this one in the picture. http://cdn.instructables.com/FB0/EMML/GQBCIZ1Y/FB0EMMLGQBCIZ1Y.RECTANGLE1.jpg

my question now is what amplifier will i use to power this speakers?

i've seen in the internet some lepai amplifiers but i guess its not available here in our country. but on the other side, i've come up with this amplifier called kinter ma-700 F276B Kinter MA 700 2 Channel 500W USB AUX FM MP3 Car Audio Amplifier-in Stereo Amplifiers from Automobiles & Motorcycles on Aliexpress.com which is available here at a low price. but the downside is its not true about what it states that it delivers a 500w power as i read in the internet.

i've also come up with this amplifier Yuan Jing Audio - TPA3116 Class-D 2.1 Stereo Amplifier [50W x 2]+ Sub-Woofer Board [100W] [Delux] - $40.80
i like it because it has an rca cable jack to insert my mp3 player or whatever i have.

i also like this one TDA2030A 2 1 Stereo Amp Amplifier DIY Board Kit | eBay becasue it has a separate subwoofer connection (because im noob also at wiring the speakers) for me to easily insert the mids and subwoofer. but one thing is that i dont know where to insert the line in or RCA cable i think in this amp.

the two amplifiers i've mentioned above is available i think here in our country. not the same specs but i think its close enough.

my build in my boombox is a DC 12v power supply because the battery here in our country is expensive but im also planning to renovate my work later if i can afford to buy one.

im begging to please explain to me your knowledge about this in a simple way for me to understand.

thanks for your help..

 

[NoobSaibot]

I hope someone will see my thread. Tnx

 

[gmphadte]

Go for the Kinter. There is nothing difficult in the kit for you. Everything is straight forward. Only see that you provide a good power supply and the higher voltage specified for it.

This amp will give you more output per volt as it is Class D.

Gajanan Phadte

 

[picowallspeaker]

two 4" konzert midrange 120w max and a two small tweeters

And, sorry, where's the mid-bass ?
As there'll be very scarce filtering -eg. No highpass, I hope those mids are in reality
midwoofers.
Keeping all the drivers very close, eg. in the same box and having the Jbl playing low-mid
(Freq.band) might sound good 😕

 

[NoobSaibot]

Go for the Kinter. There is nothing difficult in the kit for you. Everything is straight forward. Only see that you provide a good power supply and the higher voltage specified for it.

This amp will give you more output per volt as it is Class D.

Gajanan Phadte

Tnx for your suggestion sir. . I saw a sample about the kinter and as I observed, the sound will distort at high levels. Any suggestion sir on how to deal with it? Or it is caused by the crappy speakers that he use to make the test?

 

[NoobSaibot]

And, sorry, where's the mid-bass ?
As there'll be very scarce filtering -eg. No highpass, I hope those mids are in reality
midwoofers.
Keeping all the drivers very close, eg. in the same box and having the Jbl playing low-mid
(Freq.band) might sound good 😕

6" JBL subwoofer 650w max, two 4" konzert midrange 120w max and a two small tweeters

sorry sir but im confused. what do you mean about the mid-bass? is it the subwoofer? if it is, i have the 6 inch JBL subwoofer 650w max. are my drivers written above is not enough? thanks for your concern sir.

 

[gmphadte]

I don't know how far/good these class D amps have reached towards good audio but they are good for their efficient power output. If you want more power per volt, it is the choice. But audio goodness comes from class A amps and are the most power hungry. So it is a balance and you have to decide for yourself.

Remember, when you play a song of your liking, you cannot hear the amp electronics.

I would suggest go for an active setup if it is the one for a lifetime, but you will have to DIY/construct from the schematics as buying these will be too costly.

Also, you have to decide according to what you can purchase from your place.

Gajanan Phadte

 

[NoobSaibot]

I don't know how far/good these class D amps have reached towards good audio but they are good for their efficient power output. If you want more power per volt, it is the choice. But audio goodness comes from class A amps and are the most power hungry. So it is a balance and you have to decide for yourself.

Remember, when you play a song of your liking, you cannot hear the amp electronics.

I would suggest go for an active setup if it is the one for a lifetime, but you will have to DIY/construct from the schematics as buying these will be too costly.

Also, you have to decide according to what you can purchase from your place.

Gajanan Phadte

sir, i have purchased a kinter and i noticed that when i turn on the volume close in the middle, it suddenly turns off. i have a dc adapter 12v 1000mAh

 

[gmphadte]

Your adaptor will be 1000mA (and not 1000mAH)

The amp is 500Watts

W=VxA
12Vx1000mA=12 Watts

This is too small for the power amp you are connecting. If you listen to it at low volume, it will be fine, but at high output, your voltage sags and the amp shuts itself.

You have to connect a 12 volts car battery and check if things improve. Mostly it will.

Gajanan Phadte

 

[gmphadte]

Go for the Kinter. There is nothing difficult in the kit for you. Everything is straight forward. Only see that you provide a good power supply and the higher voltage specified for it.

This amp will give you more output per volt as it is Class D.

Gajanan Phadte

I have mixed up two links and the Kinter is not a clas D amp.
From the power output(2x26W), the kinter must be a BTL amp.

The power required for the Kinter is
Power input - DC12V-14.4V 5A

Gajanan Phadte

 

[NoobSaibot]

Your adaptor will be 1000mA (and not 1000mAH)

The amp is 500Watts

W=VxA
12Vx1000mA=12 Watts

This is too small for the power amp you are connecting. If you listen to it at low volume, it will be fine, but at high output, your voltage sags and the amp shuts itself.

You have to connect a 12 volts car battery and check if things improve. Mostly it will.

Gajanan Phadte

sorry typo error.. i will be using a PSU in a PC as a power supply for it has more amperage than these adaptors. and also cheaper. Im just waiting for it to arrive and buy some other equipments to convert it into a lab power supply. will this works?

 

[NoobSaibot]

i also have a problem because when i hook up my jbl subwoofer, i think the amp cant take to power it. its a 650w max. and when i changed it to my old kenwood speaker box which has a 70w max and 12 ohms subwoofer and still 6 inch, it sound better. whats the problem with this? is it the power supply or the wattage of the amp?

 

[gmphadte]

U have to remember that the Kinter is JUST 26 Watts per channel. Don't expect it to drive your 650 Watt subwoofer.

The 500Watt specified on the body is PMPO and has nothing to do with the power(called RMS, remember there is nothing called RMS power)

Gajanan Phadte