lovetomod

very interesting....those pics look nothing like my 4.1 ... but i am not surprised that the power supply is what failed. your amplifier board looks like mine , but the heat sink is different. my power supply is completely different than yours , when was your unit built? indigo must have made a drastic engineering revision at some point in time. the power supply board in yours is one unit, mine is 2 boards. interesting ! sorry i cant tell you what those parts were, our systems are different.

sounds like your power supply is dead. i agree with craftsman to check the resistors. if possible post some pics so i can take a look at it. the fact that you have no power at all makes me think power supply because that one board feeds the whole enchilada. if you are not any good with electronics , i am willing to fix it for you. ( or anyone elses that is amp related ) the total cost in parts to fix mine was $10 Dollars. i doubt it would be much if any more to fix yours. you handle shipping and buy the bottle of jack daniels SHOUT OUT::: hi craftsman !!! my few weeks of hell are over , i am back to my regular schedule and damn happy about it !!!! and i bought another car to polish it off

hey guys , sorry i've been lax in my responses, work can be hell ya know. anyways , i wonder if it was misundrestood what i said about the port tuning being off a bit. what i was trying to convey was that after removing the amp , the enclosure gained volume. throwing the port tuning off. i am not inclined to change the port size to fix the added volume - quite the opposite, i would rather return the enclosure volume to what it was before. if i wanted to play with port tunings i would design a new enclosure. it would be interesting though to see how these speakers would work in a sealed box of the correct volume. i know there would be about a 3 DB drop in output, but a more linear,and deeper bass extension. lets not forget the crossover settings for the sats though....too much headache for the moment. richard , you have me wanting more details on the decoupling caps. please, do tell ! also i think your idea on bigger power supply caps is a viable one .i am looking at the boards pretty close.... what benefit do you see from increasing the regulators caps ? i thought they were mainly providing juice to the opamps ? i dont know - just asking as far as the stuffing in the enclosures goes...i think there will be little effect on the sats- they already have some and they are not playing alot of bass. the sub on the other hand will show a marked difference with stuffing. heres something i remember from my days of building isobaric and other types of enclosures with 15 and 18" woofers. when i added stuffing i heard less resonance in the boxes, and the box SOUNDED bigger.but they were ported boxes and the sound was alot less tight. i believe (dont quote me on this ) that when adding stuffing , you effectively add 1/2 cubic foot of volume to the box. you guys can try it , but i think you will be happier with the sound quality WITHOUT the stuffing.(you are limited by the crossover points-unless you want to change them , and the sats ability to play lower-stronger midbass with authority.) back when i built stuff i built it for maximum SPL output. sound musicality was a second consideration in car stereo competition at the time. i think to play around with the crossover points and sub enclosure dynamics may detract from the EXCELLENT work KLIPSCH has done designing the promedias. ( it just so happens that the company that builds their amps missed on some high stress components ) did i just say that ? HEHEHE - dont blame klipsch 100% my experience on ports..........as far as round ports not having enough flare , if you do not hear any port noise the flare is sufficient. the difference between slotted enclosures and round ported enclosures is nill. i have built both , including transmission lines .the tuning is what matters not the style of vent. ( though there are packaging benefits to both designs ) IMHO i really love the promedia 4.1's , i wouldn't have any other speakers for my pc. ( we will not go into what high end home audio gear i own at this time) but i spend about 80% of my leisure time listening to music and viewing dvd's with my 4.1's. and i love them. alot ! ( the only exception i have to klipsch is their GMX stuff - thats their punishment for our heresy ) LOL !! i hope this post doesn't come off as snotty , i am very tired. i am just trying to relay my thoughts. there are a few more minor mods i have done to my amp - i will have pics tomorrow night for yall. god willing and the creek don't rise support klipsch or we will all have logitech crap , or altec lansing's crap ,or that other piece of crap.....or $2000 5.1 setups that do the same thing .....i digress. G'NIGHT !

you can also use non-chlorinated automotive brake cleaner. (about $2.00 a can) I have been using this stuff since they took away my beloved 1,1,1 trichloroethane. just spray on the pots ,let dry a few minutes and give it a try. hope it helps ya !

my friend , i think you need new capacitors - pm me for details

well , on my 4.1 sub the connectors to the sub speakers only go one way - red is larger than black. on the other end where they plug into the amp , they CAN be installed backwards - look on the board , one is labeled SUB-SPK - the other SUB-SPK + . if you got those backwards your sub will play 180 degrees out of phase with the sat's , which will make your bass output sound weak. hope this helps ! maybe i am not too sharp today but , are the connectors on your speakers the same size ? if so i can suggest a way to determine the proper phasing.

can you give us more information?

i do not have a sub for sale , but i will be willing to buy your fried sub. patrick

are you experiencing that hiss only through that one speaker ?

Outstanding sir !!! thank you for telling me the placement of the regulators !!! i was 80% sure that was the order but didnt want to damage this awesome system! I was getting alot of static on all 4 channels . i was familiar with the heating of a couple resistors , but they were not open so i chose not to replace them at this time. however i noticed a kind of hardened black goo around 5 capacitors , the guru at my local electronics warehouse suggested that it could be leakage , or some adhesive they used to stabilize the caps - i figured what the heck , i will replace them. guess what.....PERFECT !!! absolutely PERFECT ! no static ! these things sound brand new - and these are about 3 years old . total cost was $9.00 for the 5 caps. the two caps on the power supply i upgraded to 125 volt from 63 volt, figuring they were taking alot of abuse from being the main reservoir caps . (or are they covering the demand the switch places on the supply ?) i dont know. anyway they wouldnt fit on the board, so i made some extensions for them. the whole enchilada WAS mounted on a 12"x8"x1/4" plexiglass board (i will explain later ). the regulators are now mated to a cpu heatsink - i haven't finished the enclosure yet but it will have a small 12V dc fan running off an add on 12V regulator , i had one problem though . after i replaced the caps ,to test the amp i had it spread out on my workbench , worked great - no static . so i mounted it on the plexiglass board , only to discover it had a transient static ( when the music program got stronger the static did as well- i was using unaccompanied cello to test with as well as a tone generator.) after removing the ground straps i placed between all boards except the amp itself , and removing those 1 by 1. there was no change .i went back to the drawing board. it turns out that the switch and power supply CANNOT be too close to the amp , i had them within less than a 1/4" I have since rearranged things a bit , and everything is PERFECT ! i wish i had a few pics to post right now , but i will have a few in the next couple of days. the other mods required to do what i have done are : removed the regulators from the output board and remotely mounted them .replaced the speaker output cable to something longer and larger ( 18 gauge ) the ribbon cable had to be extended , i chopped a floppy drive cable - and reused the connectors. the 5 pin cable from the power supply to the output board needed to be replaced as well as the 5 pin to the board with the large yellow coil - i removed the connectors , prefering to hardwire things. i also added a connector near the surround outputs to head to the sub box which i sealed with 1/4" plexiglass(i will replace this with 3/4 particle board soon ) as a side note - without the amp in the sub box i noticed that the port tuning is off a bit - i realised slightly deeper bass extension , but it was boomy. i placed a vinyl disney movie case from a vhs tape inside - just stuck it in to replace the lost volume and to hear the difference - it got the port tuning pretty darn close . all in all this has worked out great ! i still have static on the surround knob only if i turn it too fast but i will remedy that next. i am interested to hear what you are doing !!! also the data sheet for the 7915 says that if it is more than 3 inches away from source it needs a support cap , it does not. again thank you for your help !!!!! there are more details to this project , but thats the gist of it off the top of my head. again THANK YOU for your help , you rock ! patrick.

hello all ! I have done a stupid thing - while modding my amp from my 4.1 set , i forgot to note the order of the voltage regulators . they are the ones on the speaker terminal board . on the board they are, U2 U3 U4 .( near the red coil ) problem is one of the three is a negative regulator , not a positive - if anyone could look at theirs i would be grateful ! the three reg's are : 7815CT - :7915CT is the negative one . they are held on to the back cover of the sub with screw clips , if someone could please look and tell me which location , U2 U3 U4 the negative one goes to i would be very grateful for the assistance and if possible will help them in the future ! you guys are going to like what i have done to this thing ,you will see the end results soon , I just made a careless mistake removing the reg's . CHEERS ! patrick