eBay class D board for car audio

[Dudster]

Hello.

My little Toyota Aygo is in for an audio upgrade.
The front system will consist of a three way system with tweeters in the a pillars, 3,5" midranges in the dashboard and 6,5" woofers in the doors.
In addition there is a 10" Inifinty basslink active subwoofer in the boot.

I recently came across a Alpine PXE650 DSP module. It has 2x3 way crossovers as well as a subwoofer output, perfect for making a fully active system in my Aygo.

I really don't want huge amps in the trunk in this little car and I am actually quite happy with the SPL provided by the original headunit which is fitted with a TA8266HQ chip.

I am really tempted to try the numerous boards that I find on eBay as they can be hidden in the dashboard or under the glovebox compartment as there is enough space under there to make a stealthy install while still having the heatsinks getting free air.

So, which boards are any good? I have read so much about poorly designed output filters etc that I am totally confused and must rely on other's experiences.

I was thinking about three of these boards:

TDA7498 100W New 100W Class D High Power Amplifier Board DC20V to DC36V Hot | eBay

Since the run on 20V I need some sorts of DCDC converter. Will this fit the bill or is it not usable for audio? Perhaps adding some larger filter caps would make it usable for audio?

Buy 150W DC 10~32V to DC 12~35V Adjustable Step-Up Mobile Power Supply Module for Laptop

Any input would be appreciated.

 

[mosfet54]

You dont need 100W and you dont need the booster.
Use this -> TDA7492 2 x 50W D Class High Power Digital Amplifier Board AMP Board+ Radiator-in Other Electronic Components from Electronic Components & Supplies on Aliexpress.com | Alibaba Group

Its same but its 2x50W and works with car voltage.
Look at the feedback its good

 

[theAnonymous1]

You dont need 100W and you dont need the booster.
Use this -> TDA7492 2 x 50W D Class High Power Digital Amplifier Board AMP Board+ Radiator-in Other Electronic Components from Electronic Components & Supplies on Aliexpress.com | Alibaba Group

Its same but its 2x50W and works with car voltage.
Look at the feedback its good

Yeah, it will "work" at 12V, but it requires 26V for full power with 8-Ohm speakers and 18V for 4-Ohm.

 

[Dudster]

Thanks for the replies guys.
I got three of these from this thread.

TDA7498 100W 100W High Power Digital Amplifier Board Amp Board with Radiator | eBay

http://www.diyaudio.com/forums/class-d/265387-ebay-cheap-tda7498-boards-6.html

The work on 12V appearantly. And comes with a standby input so I can connect them to the remote lead on the headunit.

Will post a followup thread once I get the boards in the post and hooked up.

 

[theAnonymous1]

The work on 12V appearantly. And comes with a standby input so I can connect them to the remote lead on the headunit.

The minimum recommended voltage for the TDA7498 is 14V. It will not work at 12V. Keep in mind that at 14V you will not get any more power than you would out of a typical head unit.

Also, you can't just hook the remote wire up to the standby pins; they don't work like that. You would have to use a relay.

 

[mosfet54]

yes, yes, you are right, you can get 6.5/4*6.5 = 10.6W.
i was thinked i am going to make power VAC inverter 50hz with this
i need to boost some voltage..

 

[Dudster]

The minimum recommended voltage for the TDA7498 is 14V. It will not work at 12V. Keep in mind that at 14V you will not get any more power than you would out of a typical head unit.

Also, you can't just hook the remote wire up to the standby pins; they don't work like that. You would have to use a relay.

Yeah, but I'm not searching for more SPL than what I currently have now, just less distortion.

If the amp works on 12V, the thread I linked to says that it does (even if the datasheet says it's not the recommended minimum voltage), I expect better sound quality compared to the headunit as I'd go all active three way and use 4th order active crossovers.

If 12V does not suffice, would the DCDC converter be a good way to boost the voltage while still maintaining sound quality?

I do know I need some relay arrangement to use the standby function. The remote cable from the headunit could power a relay that in turn have a potential free contact set to enable standby, right?

 

[Jerms]

Won't be 12V with the engine on, more like 13.5-14.5..

 

[mosfet54]

yes use boost converter

this is absolutely same as yours and its cheaper here ->

6A 150W Power Step Up Voltage Charger Module DC DC adjustable transfer 10 32V to 12 35V Boost Converter DIY Car Power For Laptop-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group

Won't be 12V with the engine on, more like 13.5-14.5..

this is 14.5/4*14.5 = 53W peak not 200W peak.
with the 150W booster its better

 

[Jerms]

+/- signal splits/differences and any additional capacitance....

Reason to use the booster would be if the amps won't work on 12V-sh with the engine not running.

J.

 

[korpberget]

Have you checked Bilxtra, Thorshov or Biltema for 12 to 24 V adapters?