$30 amp upgraded - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 15th October 2004, 09:55 PM   #11
zobsky is online now zobsky  India
diyAudio Member
 
zobsky's Avatar
 
Join Date: Mar 2002
Location: Dallas, Tx, USA
Default Re: $30 amp upgraded

Quote:
Originally posted by amt
Well I moved this from the Digital section since this one didnt exist then. I finally upgraded the Sonic Impact and I must say Im shocked at the quality of sound. I replaced the plastic chassis with Al, used Cardas RCAs, decent binding posts, and hooked it up to a 9.5AH 12V battery. The original input was a mini-jack that routed the signal around the board until it got to some cheesy wires that attach to the pot. I removed the jack and ran the inputs directly to an RS pot (100k alps). I also removed the entire wiring mess that ran between the board and the pot/switch. And while I was at it, I replaced all the original wiring, except for the light.

All in all I must say this is a great sounding amp. Ive listened to it on my Stax headphones for hours at a time and never got fatigue that is often the case with SS amps. The sound is somewhat dry BUT extremely articulate. Crisp with zero sizzle. Metallic sounds are superb. Cymbels, cow bells, and percussion in general are great.

Im going to hook up the high efficiency speakers next and see how it fairs on them.

amt
nice chassis notwithstanding , .. how(if) did your mods change the sound?


__________________
"Any fool can know. The point is to understand" - Albert Einstein
  Reply With Quote
Old 15th October 2004, 11:24 PM   #12
matjans is offline matjans  Netherlands
diyAudio Member
 
matjans's Avatar
 
Join Date: Aug 2003
Location: Utrecht, NL
Send a message via MSN to matjans
does anybosy know where to get these in europe? or better still, in the netherlands?
__________________
Si fractum non sit, noli id reficere!
  Reply With Quote
Old 15th October 2004, 11:41 PM   #13
amt is offline amt  United States
diyAudio Member
 
Join Date: Feb 2003
Location: oregon
I think that the sound was improved in that it was "cleaned" up . I have another SI on the way so I can do a side by side comparison but for now, memory has to suffice. I feel that the soundstage widened and that the bass response is deeper. These may be due solely to the big battery and "clean" 12v. The overall clarity was increased as well and that I attribute to being able to use good quality interconnects/jacks rather than a crappy mini plug to rca adapter cable and a slight pot upgrade. The mini plug ran the signal around the board, to the pot via micro wire and then back to the board, along side the power wires that also ran to the pot. And shielding by metal vs. plastic must have some effect. Once I listen to both together, I can give a more accurate and concise answer.

amt
  Reply With Quote
Old 16th October 2004, 12:57 AM   #14
zobsky is online now zobsky  India
diyAudio Member
 
zobsky's Avatar
 
Join Date: Mar 2002
Location: Dallas, Tx, USA
Quote:
Originally posted by amt
I think that the sound was improved in that it was "cleaned" up . I have another SI on the way so I can do a side by side comparison but for now, memory has to suffice. I feel that the soundstage widened and that the bass response is deeper. These may be due solely to the big battery and "clean" 12v.
amt


thanks, ... my SI amp improved as you describe just by using a big battery power supply. let us know once you have a chance to compare the 2 units side by side.
__________________
"Any fool can know. The point is to understand" - Albert Einstein
  Reply With Quote
Old 18th October 2004, 09:35 PM   #15
niknik is offline niknik  Denmark
diyAudio Member
 
Join Date: Oct 2004
Excellent, excellent, excellent!

This thread was just was I was looking for!

Very nice job amt!

I have not done much modding myself -but after I read the review on this little sucker on 6moons -and noticed that some modding and a new cabinet would do wonders -I'm now looking forward to recieve this little amp so I can get started....

Thanks for the inspiration!

  Reply With Quote
Old 18th October 2004, 10:00 PM   #16
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Anyone know of a Canadian source for these?

I could always order from US but...

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 21st October 2004, 07:35 PM   #17
Bill F. is offline Bill F.  United States
diyAudio Member
 
Bill F.'s Avatar
 
Join Date: Nov 2001
Location: SW MI
Don't know about a Canadian source, but I just ordered a sixpack from AMR Mart. Cheapest price I've found, And each aditional amp is just another buck to ship. Shipping to Canada ain't much extra.

For some reason, they dropped an extra $1.60 from the price--something to do with "Group Purchase Discount" (??)

Total price /ea including shipping:$22.37
  Reply With Quote
Old 21st October 2004, 07:42 PM   #18
Bill F. is offline Bill F.  United States
diyAudio Member
 
Bill F.'s Avatar
 
Join Date: Nov 2001
Location: SW MI
Since I've got a balanced source, I plan to put an XLR on each of my units and run them as bridged 30W monoblocks. No futher mods necessary to do this, right?
  Reply With Quote
Old 21st October 2004, 07:50 PM   #19
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Yea...

Someone felt pity on me and is sending me up a unit

Now just need to figure a new box -- what are the board extents?

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 21st October 2004, 07:56 PM   #20
diyAudio Member
 
Join Date: Feb 2002
Quote:
Originally posted by Bill F.
Since I've got a balanced source, I plan to put an XLR on each of my units and run them as bridged 30W monoblocks. No futher mods necessary to do this, right?
I doubt this will work. The Tripath works off a single-ended supply, and I'm pretty sure it probably already uses a full-H-bridge output topology. In other words, each channel is effectively already bridged. Check the data sheet to be sure, though.
  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
Can this be Upgraded? normalicy Car Audio 13 24th January 2008 05:17 PM
Can this be Upgraded? normalicy Car Audio 0 23rd January 2008 05:20 AM
My upgraded T-Amp kiang Class D 40 1st October 2006 01:33 PM
WTB- PAS-3 Upgraded or Mod PC-5 and PC-6 Pyre Swap Meet 0 6th July 2006 05:20 PM


New To Site? Need Help?

All times are GMT. The time now is 05:33 AM.


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