Hi Need help to build 5.1 Channel Power AMP - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 23rd May 2016, 11:37 AM   #1
veeds16 is offline veeds16  India
diyAudio Member
 
Join Date: Apr 2016
Location: Pune, India
Exclamation Hi Need help to build 5.1 Channel Power AMP

Hi DIy experts

I need help to build 2.1 channel Amp.
i have zero knowledge of electronic. just started after i found lots of Newbie got success in it.

I have already purchased
1>Wintek - 200W Mono (2SA1943 / 2SC5200) W/o Heat Sink
2>Wintek - 68W Mono (LM3886) W/o Heat Sink

for 1 Wintek-200W Sub AMP (Power supply: 2 x 30-42VDC / 520-720VA)
and for 1 Wintek-68W-Mono-(LM3886) AMP(Power supply: +/- 20 - 35VDC / 190-230VA) (68W cont. avg. output power into 4 ohms at VCC = +/-28V)

-->The above details are only for single AMP
For Wintek 200 watt i am confuse should i go with 30vdc or 42 vdc or 36VDC will be good to produce 200watt @ 8 Ohm ? and transformer power ?

For 2 Wintek-68W-Mono-(LM3886) Transformer power ?

Currently i have 24-0-24 @5A can i use it to feed 2 LM3886



Br
Ved

Last edited by veeds16; 23rd May 2016 at 08:19 PM. Reason: requirement changed
  Reply With Quote
Old 23rd May 2016, 03:35 PM   #2
DUG is offline DUG  Canada
diyAudio Member
 
Join Date: Jan 2003
Location: mississauga ontario canada
A 24-0-24 @5A is a 240 W transformer.

When rectified and filtered to DC you will have less than 240W of power (continuous)

Take a look at page 11 of this: https://www.hammfg.com/files/literature/5c.pdf

The 200W and 5 x 68W modules are not 100% efficient. Find the data sheets for the devices used in the modules. i.e.LM3886 ( http://www.ti.com/lit/ds/symlink/lm3886.pdf )

Now despite all of that music is not 100% output all of the time.

There are peaks and average power requirement levels.

I can't recall the exact values because it varies with the type of music you listen to.

IMHO the 24-0-24 @5A should be able to run two LM3886 modules with 8R speakers.

Hope that helps.
__________________
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  Reply With Quote
Old 23rd May 2016, 07:26 PM   #3
veeds16 is offline veeds16  India
diyAudio Member
 
Join Date: Apr 2016
Location: Pune, India
Hi DUG

Thanks for your reply
Currently i have planned to go for 2.1 first with two different transformer one for Sub and one for Stereo.
Transformer 24-0-24 5A will be now okay for 2 LM3886 ? or i need to contact Vendor to customize a new one?
I need best output from these two LM3886 because sub i am going to using is 12 inch 4 Ohm 300watt and as per vendor Wintek 200 amp is best choice for it.

As per datasheet for one LM3886 amp
68W cont. avg. output power into 4 ohms at VCC = +/-28V
38W cont. avg. output power into 8 ohms at VCC = +/-28V
50W cont. avg. output power into 8 ohms at VCC = +/-35V

one more thing i found that using Tran. 24-0-24 5A My DC output is +34 0 -34 VCC
is that sufficient for two LM3886 ?

Br
Ved
  Reply With Quote
Old 24th May 2016, 07:38 AM   #4
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
two 50W amplifiers fed from one transformer require a VA from 100VA to 200VA.
But will also work with transformers outside this range.
Two 68W amplifiers will work with a 136VA to 272VA transformer.

Just multiple the TOTAL maximum output power by 1 or 2 to arrive at the range of suitable transformers.
__________________
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 24th May 2016, 08:01 AM   #5
veeds16 is offline veeds16  India
diyAudio Member
 
Join Date: Apr 2016
Location: Pune, India
Hi Andrew

Thanks

Now need help for wintek AMP

1 Wintek-200W Sub AMP (Power supply: 2 x 30-42VDC / 520-720VA)
Wintek - 200W Mono (2SA1943 / 2SC5200) W/o Heat Sink

Please correct me if i am wrong with Transfo. for SUB
30-0-30 12 A
30*2*12=720VA

Vendor whom i got this wintek suggested me Toroidal Transformer from his own website
DAC - 32-0-32V X 1, 18-0-18V X 1 - Toroidal Transformer - 548VA

But price listed is very high, i will get same in local market with less price and i will have option to customize it.

Please advice for Wintek Sub Transformer.

Br
Ved
  Reply With Quote
Old 24th May 2016, 08:05 AM   #6
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
What are the sensitivties of your main speakers and your bass only speaker?
__________________
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 24th May 2016, 08:29 AM   #7
veeds16 is offline veeds16  India
diyAudio Member
 
Join Date: Apr 2016
Location: Pune, India
Hi Andrew

On Vendor recommendation i have purchased

Peerless Fabrikkerne (I) Ltd - 12" Sub-Woofer 4Ω (Local Maker) for SUB which i have planned to drive using (Wintek 200 8Ohm Mono AMP).
Peerless Fabrikkerne (I) Ltd - 12" Sub-Woofer

for Two LM3886 stereo output yet to decide drivers.
Please advice if above combination is okay or i need to change ?

Br
Ved

Last edited by veeds16; 24th May 2016 at 08:38 AM.
  Reply With Quote
Old 24th May 2016, 10:51 AM   #8
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally Posted by AndrewT View Post
What are the sensitivties of your main speakers and your bass only speaker?
Quote:
Originally Posted by veeds16 View Post
Hi Andrew

On Vendor recommendation i have purchased

Peerless Fabrikkerne (I) Ltd - 12" Sub-Woofer 4Ω (Local Maker) for SUB which i have planned to drive using (Wintek 200 8Ohm Mono AMP).
Peerless Fabrikkerne (I) Ltd - 12" Sub-Woofer

for Two LM3886 stereo output yet to decide drivers.
Please advice if above combination is okay or i need to change ?

Br
Ved
Any chance you will read my question? And maybe give an answer?
__________________
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 24th May 2016, 11:20 AM   #9
veeds16 is offline veeds16  India
diyAudio Member
 
Join Date: Apr 2016
Location: Pune, India
HI Andrew

Sorry i am not much technically strong in electronics.
for Sub its 94.7 db

BR
Ved
  Reply With Quote
Old 24th May 2016, 03:53 PM   #10
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
If your bass only speaker is 94.7dB/W @ 1m
and your satellites are 91.7dB/W @ 1m, then when you supply all three speakers with the same power you get the same SPL from the three.

If your satellites were 94.7dB/W @ 1m (to match the bass) you would need twice as much power to get the same SPL from the bass only speaker.

If your satelites are 8ohms and your equal sensitivty bass is 4ohms you get that doubling in bass power from the same voltage of the amplifiers. that means you use the same supply voltage for all three anplifiers.

Until you know how sensitive your satellites are going to be, you can't set a target maximum power for any of your amplifiers.
__________________
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Multi-channel power amp build thread tfboy Chip Amps 15 23rd December 2016 04:42 PM
Newbie looking to build a multi channel amp AnimeAi Chip Amps 8 7th September 2015 07:41 PM
Any plans to build a 100W per channel power amp? 355F1 Tubes / Valves 67 11th August 2015 07:10 PM
Pre Build questions: 6 channel Avondale Voyager build fred sonnen Solid State 0 20th December 2014 11:16 AM
Newbie wants to build a "GainClone-Like" 5.1 Channel Battery Powered Amplifier captain Chip Amps 7 15th October 2004 12:35 PM


New To Site? Need Help?

All times are GMT. The time now is 04:47 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki