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I purchased two Dayton DTA-2 (#300-385) cream gloss kitchen ideas amps to turn into dedicated headphone amplifiers for work. (one for me, one for a friend). I soldered them as instructed (using the capacitors across the terminals), wrapped the speaker output wires one time around the ferrite core, and then into a 3.5mm headphone jack, combining the L- and R-. I also purchased the 2amp 12v power supply recommended by Parts-Express. On the first one I built, there was an incredible amount of noise, at a slight but very noticable audible level. So I have this white noise hissing that does not change with the amplifier or the sources volume. It is there whether I have my source equipment plugged into the unit or not. On the second one I built, I chose to wire L+, L-, and R+ to see if combining the two -'s was a bad idea and would make a difference. It did not. I attached the R- and the imaging cream gloss kitchen ideas got much better, but the noise was still very prominent, and very much identical to the first build. Has anyone else had a similar issue, and if so, what did you do to resolve it? Thanks in advance!
The T-amps you have utilized are dual-bridged type amplifiers, and you should not allow the - connections to see each other, or the amp will be noisy and likely die at a young age. Not a good idea! Wolf
"Wolf, you shall now be known as "King of the Zip ties." -Pete00t "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith "We don't just make a crossover, we make a statement!" - Lawrence cream gloss kitchen ideas Fishburne for Cadillac *InDIYana 2015 event* cream gloss kitchen ideas Photobucket pages: http://photobucket.com/Wolf-Speakers_and_more My blog/writeups/thoughts here at PE: http://techtalk.parts-express.com/blog.php?u=4102
I don't know what price point you want to pay and how good a headphone amp you need, (if your headphones don't cost $150 ignore this). Bottlehead Labs.coms has a great little one tube headphone amp kit that's would be outstanding at 5 times the price.
Those DTA-2 amps are NOT meant to be used for headphones. No Class-D (or class-T) cream gloss kitchen ideas amplifier should ever be used for this purpose. Additionally, the DTA-2 amps require cream gloss kitchen ideas a differential speaker load, as versus the single-ended load that headphones present. Basically, this a very wrong amplifier for the intended purpose. cream gloss kitchen ideas If you want to know the nitty-gritty technical details as to why this won't work, I can go into, but trust me - you're much better off returning those amps and purchasing a headphone specific amplifier. Do a search for "headphone amp" in the PE search engine and enjoy.
Thank you very much for your replies. I thought an amp was an amp. I never knew a unique situation existed like this, so that is why I performed no research before buying them. I saw the price, and I saw the approval ratings and went nuts. For the record I run Grado SR225 and AudioTechnica ATH-M50s. I cannot return the amps because cream gloss kitchen ideas they have been all soldered on and generally molested. My goal was to have a cheaaaaap cream gloss kitchen ideas amp that someone can steal from work and I not cry if I left over night. Sadly, I still get to cry. Thanks again!
I would be interested in buying one maybe both from you if your trying to recoup some $. PM me if your interested.
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