BPA300 Round 2 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 27th January 2009, 04:35 PM   #1
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Default BPA300 Round 2

All information can be found in the wiki.

http://www.diyaudio.com/wiki/index.p...up+Buy+Round+2

Click the image to open in full size.
(Original BPA board)

Boards will be $10 each. That is $20 for one monoblock (2 boards) and $40 for a stereo set (4 boards)

The same boards are used as the last group buy. BOM can be found in the wiki.

All BPA300 round one participents please refer to the WIKI.

Feel free to post your names down in the thread if you wish, but adding your name to the wiki is necessary.
  Reply With Quote
Old 28th January 2009, 08:16 PM   #2
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
12 for myself..
  Reply With Quote
Old 29th January 2009, 11:52 AM   #3
tnargs is offline tnargs  Australia
diyAudio Member
 
Join Date: Sep 2006
I haven't been able to view the shine7 site on my browser. Tried a few times this week. Is it just me?

Without seeing that site I can't see what the GB is actually supplying...
  Reply With Quote
Old 29th January 2009, 12:20 PM   #4
diyAudio Member
 
mikesnowdon's Avatar
 
Join Date: Aug 2007
What is the measured power output of these things?

Do they only work from balanced input?

Whats the DRV for?

Sorry for the Q's but there are many many pages on the original thread.

Quite interested in these though.

Thanks,
Mike.
__________________
www.drugfreeworld.org
  Reply With Quote
Old 29th January 2009, 07:09 PM   #5
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Quote:
Originally posted by tnargs
I haven't been able to view the shine7 site on my browser. Tried a few times this week. Is it just me?

Without seeing that site I can't see what the GB is actually supplying...

The shine7 site works fine for me. It seems to be just you. The group buy is supplying the boards for the BPA300 amplifier, as pictured above. Maybe you should take a look at the original thread?
  Reply With Quote
Old 29th January 2009, 07:11 PM   #6
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Quote:
Originally posted by mikesnowdon
What is the measured power output of these things?

Do they only work from balanced input?

Whats the DRV for?

Sorry for the Q's but there are many many pages on the original thread.

Quite interested in these though.

Thanks,
Mike.

The power output is 300w @ 4ohms per monoblock.

They work in a balanced config, if you do not have a balanced source you will need,

The DRV - The DRV is to convert a single ended source into balanced output to drive the amplifier boards.
  Reply With Quote
Old 29th January 2009, 07:14 PM   #7
diyAudio Member
 
mikesnowdon's Avatar
 
Join Date: Aug 2007
What if I wanted to use just a single board per channel?

What kind of power should I expect into an 8 ohm load and would I be OK without balanced input? If not is there any way to get these working off single ended?
__________________
www.drugfreeworld.org
  Reply With Quote
Old 29th January 2009, 07:18 PM   #8
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
Quote:
Originally posted by mikesnowdon
What if I wanted to use just a single board per channel?
The amplifier is not really designed for this purpose, i have not actually reviewed this very much, but i would not reccomend it, especially into 8ohms.

Quote:
Originally posted by mikesnowdon
What kind of power should I expect into an 8 ohm load and would I be OK without balanced input? If not is there any way to get these working off single ended?
You are taking about 150w per channel into 8ohms. You are fine without balanced input, you just have to use the DRV134 opamp on the inputs or equivalent.
  Reply With Quote
Old 29th January 2009, 07:18 PM   #9
HaLo6 is offline HaLo6  United States
diyAudio Member
 
HaLo6's Avatar
 
Join Date: Dec 2008
Since I am really noob ... (like I just started this hobby about 4 months ago, I am reading "The art of electronics" to "catch-up" with the lingo of the boards here...
Is it possible somone post a better schematic of what wires go where... I can get a 70% solution looking at the posted Jpegs, but I need like a 110% solution. This may be a little ambitious on my part to undertake a project with my small level of knowledge but i figure with everyones help I can get though it and you gotta get your feet wet somehow.
  Reply With Quote
Old 29th January 2009, 07:23 PM   #10
rhysh is offline rhysh  United Kingdom
diyAudio Member
 
rhysh's Avatar
 
Join Date: Sep 2008
Location: Southampton
Send a message via MSN to rhysh
It is really simple to wire up. The balanced input goes to the input + on each board. The speaker output is + on each boards, eg one speaker is connected between two + outputs.

+OUT --- SPEAKER --- +OUT

A bit confusing, but becuase of the balanced config this is how it works.
  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



New To Site? Need Help?

All times are GMT. The time now is 06:26 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2