Jump to content

Escher

Regulars
 View Profile  See their activity

  • Posts

    176

  • Joined

  • Last visited

 Content Type 

Posts posted by Escher

    Selling my Klipsch RC3 and RS3's

    in Garage Sale

    Posted

    I'm going back to two channel and no longer need these beauties. All are in excellent condition with grilles.

    Lets say $150 on the Center and $150 on the Surround set.

    Local Preferred - I'm in Fenton, MI

    I also have the Matching RF3's and would consider a trade for Heritage series speakers... full 5.1 set for your heritage speakers..

    let me know..

    - Chris

    chip amps: Almost everything you ever wanted to know

    in 2-Channel Home Audio

    Posted

    Ok... Here are the mods with some pics..

    First, The power mods:

    One thing I dont have a pic of is bypassing the power switch... simply run a heavy gauge wire from the in to the out where the current power switch attaches...

    Posted Image

    Lepai mods by Christopher Purdy, on Flickr

    Replace C1 with a much higher value cap - I used a 63V 10,000uF

    Replace L1 with a toriodal high amp inductor - See my vids for which I used - I cant remember...

    Next - The Input Cap / Tone / Volume circuit / Power-on Thump Fix

    Posted Image

    Lepai mods by Christopher Purdy, on Flickr

    Bypass C20 and C21 as shown using 2.2uF (double check this on the existing caps) audio quality caps

    Re-Connect to Surface mount locations below:

    Posted Image

    Lepai mods by Christopher Purdy, on Flickr

    Attach to rear most side of C30 and C31 (Side nearest the back of the amp).

    Your lead from C20 should go to one side of a 2.2uF cap. The other end of the cap connects to C31. They are both on the left.

    Correspondingly, the lead from C21 then goes to the other 2.2uF cap, which then goes to C30. They both are on the right

    I used jumper wire to give myself more room.

    Next, Remove the tone controls, the bypass, and the volume control:

    Posted Image

    Lepai mods by Christopher Purdy, on Flickr

    Now remove Op-Amps U1 and U2 as they have been bypassed and are needlessly drawing operating current.

    Posted Image

    Lepai mods by Christopher Purdy, on Flickr

    Now for your Output Inductors:

    Posted Image

    Lepai mods by Christopher Purdy, on Flickr

    Replace L2, L3, L4 and L5 with the same value toroidal inductor as used in the PSU mod. Once again - I cant remember the value so check my other videos.

    And thats it - All this info came from a forum post on DIYAudio.com here:

    http://www.diyaudio.com/forums/class-d/90500-lepai-t-amp-ta2020-91.html

    That should put you at page 91 or so, its a huge thread that goes into every aspect of the Tripath chips and their design... Its where I got all my info... I dont claim to have the knowledge - those folks are awesome..

    Ohh and one final thing - I didnt use a 1A power brick, I used a 5A brick.. 1A wasnt enough juice... So - make sure you get a 5A brick... sorry for the confusion.

    And - I have to say it - If you dont have the soldering skills, dont try this... you can easily kill your amp. Perform the mods at your own risk, no warranties, blah blah.... you get the picture... Go slow and do a little at a time and its a great project - I've done two now..

    - Chris

    chip amps: Almost everything you ever wanted to know

    in 2-Channel Home Audio

    Posted

    I wish I would have seen this sooner...

    I did a pretty involved project with these amps a couple of years ago..

    Basically here is the skinny:

    1) You need at least a 1amp capable power supply

    2) The power supply cap is a joke... I replaced it with a 10,000uf cap (had to wire outside the case). This dramatically improved the available power for bass... prior to this there was hardly any.

    3) Change the input coupling caps - I went with vintage PIO military caps.

    4) Change the output inductors to quality toroidal models...

    5) Bypass the internal trebel and bass controls - which also bypass the input stage op-amps, which also stops the power-on thump..

    6) Pull all associated, no-longer needed, componentry.

    I did a couple of youtube vids on mine... I'll see if I can find the posts that discuss all the required values for the caps and inductors.

    Here are my youtube vids... Sorry they are old and dark, I'll see about taking some pics...

    I was powering a pair of La Scala's with them and could blow you out of the room with little effort.

    This second video goes through the majority of the mods:

    http://www.youtube.com/watch?v=QTZJeVKlh3w

    And this was the first video when I had only modified the input caps and power supply cap I believe:

    • Like 1

    Serious question - Heresy's V.S. RF3's for fronts

    in 2-Channel Home Audio

    Posted

    Are your RF-3's part of a multichannel system or just 2-channel? Do you have a subwoofer? Do you have room for a second rig, either in same room or seperate room?

    Bill

    6.1 setup.... See sig... Infinity sub, unfortuately... but its doing its job for the moment...

    I can fit a second channel up front as a B-Set, which is the plan... My Marantz 5006 will do that quite happily...

    I have some of the funds, but they were earmarked for another project... but you know how it is, this vintage girls turn your head and you just cant look away!

    I'd likley side by side them with the RF3's for a while.... I'm just curious as to what to expect...

    I had La-Scala's previously - would you say they are more like them, or closer to the RF3's?

    LaScala empty cabinets in Hamtramck, MI - essentially free

    in Alerts!

    Posted

    I was going to pick these up, but any way I run it, I just cant afford the refurb.

    I have been in contact with the seller - and he was willing to give them to me for free since I'm so into Klipsch. I told him that I would help him find someone to take them.

    He has them listed on CL for $50, but I think he will give them away if you are planning a refurb and not trying to make money... he just needs space.

    They were DJ speakers, and the components were moved into another set. They are currently covered on the top and both sides with carpet... they are from the early 80's. He also has the crossovers - AL version he believes.

    If you are interested drop me a PM and I will get you his contact info.. Nice guy...

    Midrange horns for La-Scalas

    in Technical/Restorations

    Posted

    Yuk Bruce - sorry your dealing with that - I know I'd be miserable if the wife had to be half way around the world!!!

    The eliptrac looks sweet - I was checking that out as well.. but out of my price range atm..

    Good news on a couple of other fronts though - Bob got back with me lickety split... and he said to call klipsch again and find someone else who knows there stuff... so I'll call again...

    I also got a response from another gentleman who has a set of K400's and K55's at a decent price...

    Now I just have to get the cabinets and make sure they are solid enough to start this process..

    Midrange horns for La-Scalas

    in Technical/Restorations

    Posted

    Escher, have you checked with Bob Crites on a K-401 horn?

    Have to say I'm astonished that Klipsch no longer stocks the K-401 horn since they are still using them in the LaScala and Khorn. Don't know whether that's ominous or good news for LaScala and Khorn.

    I'll send him an email... I already started send emails to folks who make aftermarket horns..

    Thanks for the idea!

    Midrange horns for La-Scalas

    in Technical/Restorations

    Posted

    Ok.. Lets try this a different way.

    Assuming you had empty cabinets and could go any way with horns / drivers... all while trying to keep it as cheap as possible..

    What would you do?

    I'm open to a two way system as well... look at Selenium 2" Horns, I may be able to do a two way with crossover at 500hz... but not sure if the

    bass bin goes that high... from what I have read, the stock crossover is 400hz...

    Midrange horns for La-Scalas

    in Technical/Restorations

    Posted

    Sweeet!!!!

    Now I'm starting to get excited - I just spoke to the seller - his company has always owned these and they were used for DJing..

    He has a set of Type AL crossovers he will throw in - saves me a couple hundred bucks... I'll just rebuild them.

    Its fun to learn some of the history on these old beasts - they are early 80's vintage.. pretty nice guy - He may buy our Churches old EV Sentry's that we arent using as well..

    Anyone in the Detroit / Flint area have LaScala drivers they want to trade?

    in Garage Sale

    Posted

    I'm going to be doing a rebuild on some emtpy cabs and need parts...

    I have some other speakers that I can offer in trade.

    Polk RTA 12b's that I rebuilt the crossovers on - good condition and sound great.

    Sony SS-TL5 transmission line speakers - in very good shape - natural oak veneer. Very nice as well..

    I'd be willing to give you both sets for some working parts... let me know what you have.

×
×
  • Create New...