STK series amp modules- any good? - Page 4 - 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
Thread Tools Search this Thread
Old 19th December 2013, 11:29 PM   #31
diyAudio Member
Join Date: Dec 2013
I like the absolute silence when it's on and therefore the ability to play at very low levels without drowning in noise. The amp I'm now building with it will be a cool running, underpowered and very small workspace amp. Nothing fancy. I suspect it will do nicely with a pair of jbl control 1.
  Reply With Quote
Old 25th December 2013, 10:18 AM   #32
Apex Jr is offline Apex Jr  United States
diyAudio Member
Join Date: Jun 2002
Location: Torrance, Calif
I have an amplifier already built and has been modified for other uses
using the STK 4141v HERE...HTP 25/25 Full Range Amp
Dual 25 Watt
FOR $19.95..
Also the STK 4038 and STK 4041 both listed on my website
  Reply With Quote
Old 2nd January 2014, 10:27 AM   #33
diyAudio Member
Join Date: Dec 2013
My first tryout for a cpu cooler based stk amplifier. I think the stk modules are perfect for being cooled by cpu heatsinks as they are very similar to cpu's in both form and heat dissipation requirements. This is an intel stock cooler, the fan is just for mounting the heatsink and is not operational. It is not needed because it's a low power amp and the heatsink barely gets warm when playing at neighbour-friendly sound levels.Click the image to open in full size.
Attached Images
File Type: jpg 1522453_672374356116647_1202904450_o.jpg (176.0 KB, 151 views)
  Reply With Quote
Old 2nd January 2014, 12:19 PM   #34
Moviola is offline Moviola  Brazil
diyAudio Member
Join Date: Aug 2012
Location: Brazil
Almost all STK were discontinued in 1995. Please see attachment. Those currently on sale are fake.
Attached Files
File Type: pdf Sanyo discontinued STK moduleI.pdf (30.9 KB, 129 views)
  Reply With Quote
Old 3rd January 2014, 02:09 AM   #35
diyAudio Member
Join Date: Dec 2013
According to my local, respected electronics shop the 402-070 can be ordered. I did. He also confirmed they are genuine Sanyo. They should arrive tomorrow, I'm confident it will be the real deal. Might be old stock or service parts.
Also, Sanyo semi was acquired by ON-semi and they have some stk's in their current catalog:¶mName=paramString¶mVal=A udio%20Amplifiers%3aClass%20AB%3a2502766
  Reply With Quote
Old 7th January 2014, 11:03 AM   #36
diyAudio Member
Join Date: Dec 2013
Got it! I can confirm this is a 100% genuine Sanyo stk chip, not a fake. They have lots and lots of them in stock and by the looks of it On-Semiconductor is planning to release more STK series. Maybe they can bring some order in the chaos that is the STK family? My main focus will be on the 402-xxx series as they are symmetrical, small and powerfull. I'm designing a custom pcb for it with short-as-possible routing and optimal component placement for use in a series of amplifiers I'm planning to build. New life for the unique hybrid amplifier that is the STK chip.
  Reply With Quote
Old 16th January 2014, 08:57 AM   #37
diyAudio Member
Join Date: Nov 2006
Default STK Hybrid amp modules.

The STK chips (the newer ones) are used by many AV receiver manufacturers like Yamaha in their entry to mid range models. The audio quality of these chips is really good in well executed designs and should not be underestimated.
  Reply With Quote
Old 24th January 2014, 02:47 PM   #38
diyAudio Member
Join Date: Dec 2013
Correct. The bad reputation these hybrids have is largely because of terrible design of these entry and midlevel consumer electronics. The kenwood unit I pulled a 402-040 out of suffered from horrible pcb design, lots of wirebridges, flatcables and too small heatsink. Also it had numerous opamps, dsp's and unnecessary filtering caps all across the board. No way that can produce good clean sound. Must have sounded dull, bland and wooly. Now that it's freed of that surrounding and built on a gainclone like pcb with ultra short signal paths and no additional filtering or long cables it is a most revealing little amp. Very accurate reproduction, no hiss or hum and excellent clarity. Everything you would expect from a well designed class AB amp. Also, by cooling it properly with a cpu cooler it barely gets warm so there's no risk of frying it when put under stress. I suspect a lot of the premature failures are due to bad cooling designs and mismatched speakers. These hybrids really don't like low impedance loads, 6 ohms is the lowest they can do without burning up but they are at their best with 8 ohm high eff speakers. I really can advocate experimentation with them, for instance: most brands like sony, kenwood, yamaha etc simply use the application note schematic. I'm sure that with some experimentation the results could be much better. My research into STK's is ongoing and so far I like what I'm seeing (and hearing) so expect more updates from me on this topic.
  Reply With Quote
Old 13th January 2017, 08:03 PM   #39
diyAudio Member
ChopperCharles's Avatar
Join Date: Jan 2008
I know this thread is ancient, but that little amp is very cool and I'm wondering if you did any more research and development on STK-based amps?

  Reply With Quote
Old 1st February 2017, 12:50 AM   #40
stoneku is offline stoneku  Taiwan
diyAudio Member
Join Date: Apr 2004
Location: Taipei
Send a message via MSN to stoneku
Hi, about the STK power chip ,
I know the STK-084 50w chips are used in Electro-Voice (EV) Sentry 100EL powered monitor speaker system. (not active speaker, it use passive crossover)
These speaker are made for recording studio , and in that year I know some studio are quite like it's sound quality!
  Reply With Quote


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
Are these Velleman speaker protection modules any good? Spasticteapot Parts 4 17th December 2014 07:21 PM
Quality of Hammond 300 series power transformers compared to 200 series? G Tubes / Valves 10 3rd August 2012 07:32 AM
Nad 1300/2600 Monitor Series Amps - any good? trirod Solid State 2 26th November 2008 03:40 PM
UcD modules - can the modules work without the input op-amp? beppe61 Class D 8 11th October 2006 07:35 AM
How good are the Dayton Reference Series woofers? tcpip Multi-Way 12 23rd March 2006 06:58 PM

New To Site? Need Help?

All times are GMT. The time now is 04:45 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