D
Deleted member 148505
Yes correct, the ATS heatsink will not hinder other parts selection.
That's why it's difficult to retrofit other heatsink because the height of those caps are higher than the TPA3255 chip itself.
As I saw in other class-d threads, other TPA3255 amps uses 100nf caps instead of 1uf in that area (cost considerations for heatsinking) because they are lower in height, so that they can just place the heatsink on top without using spacers or copper shim.
Hello
My dac comes out 2v max, I use it as a preamp, I have temporarily attenuated the input of 3E and JLE in order to use the dac as much as possible in domestic use, a volume control is planned, but blocked for 1 month in a Chinese warehouse.
Thank for your work
regards
Bobo
D
Deleted member 148505
D
Deleted member 148505
The best one in stock !
Equivalent to KZN, and exist in 2700µF/63V 18x40mm, but not in stock yet...
D
Deleted member 148505
Some SMPS will not tolerate high capacitance, low ESR caps as stated on DCAN-58 app note. 1800uF to 2200uF I think is enough.
Also make sure that the SMPS can handle large load capacitance, otherwise it may not start up properly or may oscillate.
D
Deleted member 148505
Nice, that's a gem, I wonder if there's a difference in sound for DIP vs SOIC versions..
D
Deleted member 148505
D
Deleted member 148505
Thanks for the trust!
Possible immediate upgrade is the input electro caps because Alexscan said that Nichicon muse is 'aggressive sounding'. Elna Silmic II is 'smooth' sounding.
Even though I have many stock of Nichicon muse right now. I will change input caps to Elna Silmic II after my next mouser order arrives.
D
Deleted member 148505
For those who have a balanced line driver, you can remove the opamps and tap pin 1 for +in, pin 4 for gnd, and pin 7 for -in.
Do not use IC socket because it has a thick rounded pins, it will make the holes of the IC socket larger, if you put opamp afterwards it will feel loose. Use thinner rounded pins instead (picture 2).
Do not use IC socket because it has a thick rounded pins, it will make the holes of the IC socket larger, if you put opamp afterwards it will feel loose. Use thinner rounded pins instead (picture 2).
Attachments
I am using the LME49860. Yes, I will need to tidy things up once I place them in a proper chassis. They are not housed in a chassis now. The Connex SMPS and amp board is fired up and hooked up to 2 tiny computer speakers for testing and burning in while waiting for the chassis to reach me. I am not actually listening to it in my actual set up yet. I believe the amp will sound good, given the nice layout of your board.
Hello
Nichicon BP / Silmic change made 2 days ago as well as the 2 100uF, also in Silmic
Best regards
Bobo
Sometimes the Silmic IIs dampen down the airiness at the upper end while "warming" the signal. People sometimes says they provide a "tube-like" sound but I don’t own a tube amp so I can’t vouch for that. The bi-polar MUSEs do create a bit of a aggressive upper end while neutralizing any emphasis in mods and lows (not bad if your speaker system needs that). One should also consider the "plain Jane” Nichicon KA series in the signal path. I like them for their airiness. All of them take a bit of playing to break them in.
My guess is that the op-amp picked as "your best sounding" will be affected by the choice of signal path caps as well as the overall amp design. For instance I bought a newer version of the 3e-Audio amp which came with "silmic II" caps (supposedly; one of the three cap versions that were sent out). The color of those Elna caps made them look like Cerafines than Silmic IIs. But the amp sounded really good. I changed the 8 caps out with Silmic IIs from Mouser and the sound completely changed (muted the upper end a bit ) and didn’t get any better after a week or two of playing. I changed out the 4 caps post-op amps with the KA caps which instantly improved the sound which only got better over time. Obviously Op-amp choice will still play a role in what one hears.
Cheers, Pete
- Status
- Not open for further replies.