Do It Yourself

Not sure if this is the place, but I need knowleadgable people abou the subject so here we go: I study design and I'm thinking about building a hybrid headphone/computer speaker, and was thinking about the difficulties of this. I'm uncertain if it's at all possible, because I'd have to meet the sensitivity and dB output of both a regular speaker and a headphone speaker. And I can't actually design one (I'll only design the prototype around it), so I'd have to use something that's already out there. Sound quality is not really a concern, it just needs to be acceptable. One thing I considered was to have a regular driver (sort of those used in laptops) with some kin…

Check it out - it even has pics of the populated board at the end of the PDF, hehe! http://www.eserviceinfo.com/downloadsm/21578/Melos_Melos%20Sha%20Gold.html

Hi all, As part of my home theater build, have decided to go for 3 way actives for front LCR… so, need to build 9 power amps for fronts and 8 amps for surrounds… to pair up with my Sherbourn PT-7020A pre/pro. I needed something as easy, but more powerful. This is when I and my friend John found the datasheet of TDA7293. This IC can run up to 100V, low distortion, and can easily be paralleled. Having built single chip amp and extensive listening TDA7293 is my favorites for IC power amp applications. I have been looking for a source of PCBs using parallel TDA7293s… there are not many out there that you can buy. We then decided to do our own PCB. Our schematic is almost…

Can the popular replacement cables be reterminated to balanced, (i.e are they 4 condutor all the way to the plug)? Like Equinox, Blue/Silver Dragon, Zu mobius, Cardas etc? Cheers Pete

I have some of these Chinese "CMC" type RCA Jacks. They have a knurled ring that has indents for some type of PIN wrench. What do you guys have for these to keep them from getting scratched up via pliers? PIC

Hi forum, I've recently purchased a set of Sennheiser headphone with no microphone. As my intended use was for the pc, i've purchased a few cheap headphones with mic to try and mod a mic onto my headphone. Unfortunately everything was going great until I reached a point where i had to dismantle this metal part from the line of the microphone, which resulted in me cutting into the cord by accident, so now I've just decided to strip the cord completely trying to figure out how i can connect / solder it back together. (Will have to buy the soldering equipment) Below I've attached an imagine of it all, this microphone was originally attached to the turtle beach XC1 xbox he…

Anyone here built a Faraday cage? Strikes me as pretty easy. I've got some sort of RF source in my vicinity here at work, and am tempted to build one for my audio equipment. Basically, it needs to be (a) made of conducting metal, ( continuous (all conducting materials must touch each other) and © ventilated (so heat doesn't build up). Does it need to be grounded? I am not sure I understand why if it does.

Looking for some one to build me 3 pin XLR's To Rca , or 1/4"'s to RCA to hook my Begringer DEQ2496 to my headphone amp. Can anybody help me out?

I want to shoot the audio out of the USB port on my Apple Express instead of the optical out. You tell me how. And none of this "it can't be done" nonsense. Thank you for your assistance.

Anyone here have experience with one of these? Price is right, but likely too good to be true? https://volumio.org/product/allo-stepped-attenuator/

I have finished two stage CSG-ACLF-001 AC power filter for audio. I can send one for free to person which has audio experience and can test and write review. This filter decigned for DAC or Headphone AMP or other audio product with total power 150W. Voltage Rating 110-230V AC Dimensions W/L/H 30/60/27mm Earth leakage curent 0.8A Temperature Rating -25C +85C

I started to think about upgrading my HT and my new plan is to have an AV processor plus power amp. After searching for a while, I figured that Hypex might be a good choice as a power amp. What would be a good option here? A) 5 X UcD400HG with HxR Softstart module Exodus MCH Power Supply Transformer 115/230V x40V 1KVA 5 X UcD400HG with HxR SMPS1200 Plus of course heatsinks, case and other accessories. My current speakers (Infinity Cascade Model Nine, Three C & Three V) don't need that much power, but you never know when upgradetis hits you and UcD180HG with HxR costs only a bit less. So, what do you think? Should I look for something else or …

So the optical in on my north star broke. The little plastic piece that swings up when you plug in the optical cable snapped off at the NYC Meet and I can't find it. So now when I plug in an optical cable, there's a lot of play in the jack. It works, but the cable can come loose very easily. What a stupid design. Has anyone had this problem before? Any suggestions how to fix it? In the alternative, if I decide to use the Coax input on the north star, I'd need something like the M-Audio transit to convert the optical out from my iMac, correct?

Hi guys, I've recently been thinking about having a DIY DAC built, but the only one I know is the Alien USB DAC (or Guzzler's for that matter). What other DIY USB DACs are around? And secondly, how good is the Alien DAC? Cheers, Nanoha

Hi all, I purchased a KGSSHV recently, and whilst overall i'm very pleased with the sound, the pot installed is cheap and unfortunately has some balance issues at lower volumes. It looks to be a modular type pot, and bizarrely has 4 lugs per channel rather than 3. I've managed to get hold of what I'm told is a rather nice TKD 4CP 2500 pot, which has three lugs per channel. Can anyone offer some advice on the correct way to go about wiring it in? Looking at the old pot, there looks to be a set of bridged lugs on the far right which go directly to a piece of wire bridging the inputs at the back of the amp, as well as left/right input and output wires from t…

Could anyone who has succesfully built an issue free AlienDAC post your BOM? I will be placing my parts order through mouser or digikey on Friday and want to make sure I get it all in one fell swoop. I spent some time reading the long thread over at HF and it seems like to many people tried something different and it didn't work out. This will only be the second audio gizmo I've built (1st was a CMOY) so any other comments or advice would be appreciated.

hey, i wanted to build a kgsshv as a fun project but since i am a beginner i figured out i would be better off starting with something more simple. so, how do i start? also which tools i need for the measurements and building? (sorry if this post is redundent)

As some of you may know I've got a bit of history with the Millett Hybrid Amplifier. It all started about a year ago when I set out to build a headphone amp for each of the members of my wedding party (all music lovers who use headphones in some manner). Two of these came together rather quickly as they were pretty much bone stock Hybrids. The third of the bunch which was to be built for en480c4 got a bit more complicated. First was the addition of a STEPS power supply for his birthday, next up was a set of diamond buffers for no reason and finally it was finished off with a custom Walnut enclosure because I wanted it to be in a case that no one else had. This weekend wit…

Are the connectors Etymotic uses to attach the cables to the pods of the ER4 custom? I'm thinking of building a cable for them and would hate to splice the original connectors.

A friend asked me to come up with a phono stage that is of reasonable quality but not too over the top. Here's my first go. Basically, it is a hybrid cascode gain stage followed by a passive RIAA filter and a cathode follower. The idea is that the single gain stage should not only provide enough gain, but it should be reasonably quiet. The Zout is also governed by the plate resistor which keeps the filter stable even as tubes age. In a sense, it is much like Pete's pentode phono, other than that the cascode should be a bit quieter than a pentode. That's a lot of should's, so it remains to be seen whether it actually works. The only really tricky part I anticipate is se…

Recently a distant friend grabbed a few of this pot, called bi p260p, made by plastic，sounds like some common Brit stuff. seems nothing special at all. But lol, I gotta lol first, P&G is OEM by this company... Actually, P&G is the cherry-picked version of this pot, the tolerance of this pot is 10% (means channel unbalance), we could just pick 10 of these, and select them by ourselves. No need to pay the price of P&G. btw, made by plastic is actually the element is plastic. link http://www.bitechnologies.com/products/panel_pots_sg.htm http://www.bitechnologies.com/ProAudio/ProAudio/index.htm

Does anyone know a supplier that sells the square wood tube amp cases with the metal top for mounting the tube & transformers?

Is there a demand for another run of the classic kgss board? Show of hands please. I for one love to build it, with the new sockets coming from Justine soon. Maybe makinging fully ccs. Naming it Kgss+ ??

Anybody know the part number for the LEMO connector used in the stock Qualia 010 cable? Thanks.

For those who haven't been browsing HF: This is some amazing work! http://www.mundohi-fi.com/portal/index.php?module=pagesetter&func=viewpub&tid=8&pid=8&page=1