0 Members and 1 Guest are viewing this topic. Read 376574 times.
The one I posted a pic of has some hiss and on my new/used Omega speakers there is so much treble that I can't even play a record because it accentuates the surface noise and what used to be barely audible pops to the front. Even setting the needle down sounds different. All my digital media is detailed, bright and unlistenable right now. Like an amazing tweeter/mid with the woofer removed and the treble turned up to boot. The speakers should settle down (and are), but sadly I had no idea an amp/speaker combo could be so far off. I even switched this am to an old integrated Yamaha DSP amp. It helped a bit. Man I wanted to use the 3116 with these Omegas.I'll add some 47kohm resistors when I get home from vacation on several of my chip amps and see if there is any chance of finding a happy marriage with these Omegas.
lacro,Very beautiful work there. Thanks for sharing your photos. Which caps did you put on the power supply? They look like they might be 2,200uF caps or something else significantly higher in value than the stock 220uF power supply caps.I'm considering the Pioneer speakers for my office, and it's good to know that the TPA3110 has enough power to drive them.
What capacitance value do you recommend? The lead spacing for the power supply caps is 3.5mm. The largest radial-leaded electrolytic cap size with a 3.5mm lead is 680uF / 25V if I get Panasonic FR caps. The Nichicon Muse KZ and Elna Silmic II caps in larger values are only available with 5mm lead spacing. Are you bending the leads to fit the thru-hole spacing, or are you using the SMD pads to mount the Nichicon caps? With having to bend the capacitor leads to fit either the smaller thru-hole spacing or the SMD pads, it seems like there would be some parts of the leads that are susceptible to picking up RFI from the chip.
That's unfortunate. I really like Omega speakers for their huge sound and high efficiency. I met Louis Chochos at a Rocky Mountain Audio Fest in 2007, and he was one of the nicest people I met at the show. All the tweaking I've done still hasn't completely eliminated the hiss noise. On the other hand, my TDA7297 Class A/B chip amp is dead silent. My SMSL SA-S1 Tripath TA2020 T-amp is not dead silent, but significantly less noisy than the TPA3110D2. Still, with the little bit of noise I hear, the sound quality of the TPA3110 amp is more pleasing to my ears than either of the other two amps.
wushuliu suggested a cap swap from stock which was quickly noticeable in SQ The 5MM lead spacing was not a problem as the difference between 3.5MM and 5MM is only about 1/16" total. That's not difficult to bend, and make the leads almost as short as the stock caps. Remember this is my very first soldering job on a board However, it was much easier than I thought.
What happens if you get something like Nichicon UHW1V222MHD (2200uf, 35V) with 5mm spacing work? Just trying to understand what happens when you change stuff around. I am going to get some 2200uf like lacro mention also.http://www.digikey.com/product-detail/en/UHW1V222MHD/493-6871-ND/3664337
Page created in 0.041 seconds with 27 queries.