Anyone ever DIY the amp section? - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 9 Old 10-16-10, 05:02 PM Thread Starter
Elite Shackster
 
GranteedEV's Avatar
Kick logic 2 da curb
 
Join Date: Aug 2010
Location: Calgary
Posts: 1,747
Anyone ever DIY the amp section?

Any of the subwoofer guys here, that is. :P

Plate amps are nice but have their limitations, and class H type pro amps are great except they're huge, loud and heavy, and esoteric audiophile amps are often overpriced, underpowered and unecessary for this purpose. Actually, for their own purpose too, which is why I was looking at the hypex Ucd400 to make a pair of monoblocks for stereo listening when I noticed their more powerful offerings... the Hypex Ucd700 and UcD2k modules look just right for most of our purposes.... seems like an interesting alternative; if possibly more expensive than an EP4000. I'm sure there's other class D type modules out there with the same type of output ability, and in these lower frequencies even traditional class D designs work well... so I just got a bit curious if anyone here's done anything of the sort...

Last edited by GranteedEV; 10-16-10 at 05:21 PM.
GranteedEV is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 10-16-10, 05:47 PM
Senior Shackster
7
 
Join Date: Jan 2008
Posts: 790
Re: Anyone ever DIY the amp section?

I used to build a lot of amplifiers, and still do occasionally. I just don't find it good value in terms of cost, time and performance on the whole; second hand is better. However, for someone who hasn't done it before, it can be a great learning experience and well worth the effort even if the cost is higher. Plus you can build it to a higher spec than a commercial manufacturer can.

Oddly, I didn't find it listed at the Hypex shop, but in another site for €379 or ~ $US529 + postage, duties etc if applicable. To make this into a complete plate amp, you'll need at least a PSU (transformer, rectifiers, caps or SMPS), a case, heatsinking, connectors, low pas filter (and most likely high pass filter) and some EQ. These last couple you can get from a MIC2200 or similar. Then there will be a myriad of little parts you'll find you need as you go along; usually at 2am or Sunday afternoon when the stores are closed.

For DIYers, unless you can make your own, the case is often the hardest part. Plate amp chassis are not common and a decent 2RU chassis will be $50 or likely more. Experience has made me reluctant to mount electronics anywhere that vibrates if I have another choice.

PSU transformer will be >$100, for example the Antek AN10450, and maybe $60-100 for the rest of the parts. Note the Tx is rated for 1kVA and this is the absolute minimum I would use; ideally it would be better to use two of these.

You'll need to read the application notes and determine how much heatsinking is required, but if you intend to use it very hard, assume you'll need to dissipate 200W or so. Better to overdo this for a few extra $ than have the amp fail.

Add another $50-100 in misc parts and you should be just about there.

Note, I'm in Australia, so I just did some quick googling to look for parts. What you can come up with and for what cost via local or other sources, you'll need to find for yourself.
Lucky7! is offline  
post #3 of 9 Old 10-16-10, 06:19 PM Thread Starter
Elite Shackster
 
GranteedEV's Avatar
Kick logic 2 da curb
 
Join Date: Aug 2010
Location: Calgary
Posts: 1,747
Re: Anyone ever DIY the amp section?

Well it is a bit cheaper at the hypex shop..


Which would come out to roughly ~450 us or cdn
GranteedEV is offline  
 
post #4 of 9 Old 10-16-10, 06:30 PM
Senior Shackster
7
 
Join Date: Jan 2008
Posts: 790
Re: Anyone ever DIY the amp section?

That's a better price and I'm surprised I missed it as I did look. You'll still need all the other bits though.
Lucky7! is offline  
post #5 of 9 Old 10-16-10, 06:39 PM
Senior Shackster
7
 
Join Date: Jan 2008
Posts: 790
Re: Anyone ever DIY the amp section?

Forgot to mention that I've had some of the smaller Hypex modules, LC Audio and Tripath units (41Hz). The Hypex seemed he best and generated the least RF hash. Bruno Putzys knows his stuff.
Lucky7! is offline  
post #6 of 9 Old 10-16-10, 06:39 PM Thread Starter
Elite Shackster
 
GranteedEV's Avatar
Kick logic 2 da curb
 
Join Date: Aug 2010
Location: Calgary
Posts: 1,747
Re: Anyone ever DIY the amp section?

Quote:
A9X wrote: View Post
That's a better price and I'm surprised I missed it as I did look. You'll still need all the other bits though.
Oh I'm not building it, I've already got a tapco J2500. What I'm maybe next year thinkin of building is a pair (or trio) of UcD400 monoblocks. It's either that or emotiva/outlaw's 200w monoblock offerings, and I really want to go class D plus it doesn't seem too convoluted

It's just that the UcD2k piqued my interest and I figured I'd see if anyone's done it over here for a sub. I may have considered it if I didn't already have the tapco.

Last edited by GranteedEV; 10-16-10 at 06:49 PM.
GranteedEV is offline  
post #7 of 9 Old 10-16-10, 06:45 PM
Senior Shackster
7
 
Join Date: Jan 2008
Posts: 790
Re: Anyone ever DIY the amp section?

Quote:
GranteedEV wrote: View Post
What I'm maybe next year thinkin of building is a pair of UcD400 monoblocks.


It's just that the UcD2k piqued my interest and I figured I'd see if anyone's done it over here.
Plenty of builds and more tech details on diyaudio including posts from Bruno and Mathis (sp?) from Hypex.
Lucky7! is offline  
post #8 of 9 Old 12-04-10, 07:37 PM
New Member
 
Join Date: Dec 2010
Posts: 4
Re: Anyone ever DIY the amp section?

Currently doing a build will post when done!
mark_87 is offline  
post #9 of 9 Old 12-11-10, 11:42 AM
Shackster
Steve
 
Join Date: Jan 2009
Location: St Paul, MN
Posts: 35
Re: Anyone ever DIY the amp section?

I was trying to post a website which has several amp projects including a sub amp. Unfortunately I don't have enough posts yet to have that privilege. I have built the P3A and P101 and found them to be very good amps (google Ellliott Sound Products). There is a subwoofer amp project with PCB's available as well.
Steve
SteveMA is offline  
Reply

Bookmarks

Tags
section?

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome