TPA3251/55 High Power Class D Amplifiers

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Studio19atx

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Re: TPA3251/55 High Power Class D Amplifiers
« Reply #80 on: 12 Jul 2018, 04:34 pm »
Just as a curiosity, I wonder how do 3255 sound in comparison with the Hypex modules (NC252P). From my experience the hypex smps play a big role in the sound of their amps. I have tried NC500 with other non Hypex SMPS and there is a noticeable difference in sound.

gregfisk

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Re: TPA3251/55 High Power Class D Amplifiers
« Reply #81 on: 12 Jul 2018, 05:03 pm »
David, could you point me to the FX audio 3255 amp? I only see the FX amp using the TPA 3250.

Thanks,

Greg

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davidldl

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Re: TPA3251/55 High Power Class D Amplifiers
« Reply #83 on: 13 Jul 2018, 12:51 am »
>David, could you point me to the FX audio 3255 amp? I only see the FX amp using the TPA 3250.

>Thanks,

>Greg

Sorry Greg, I was talking about two different chips.   I did not state this in my comparison.  For FXAudio, I only saw the TPA3250 model.   I'm unaware of any FXAudio TPA3255 amps.


David

davidldl

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Re: TPA3251/55 High Power Class D Amplifiers
« Reply #84 on: 16 Jul 2018, 04:54 pm »
The YJhifi Audio amp is very strange.   I don't know if it has a design flaw or I just got a bad unit.   
If I turn it on without it paired with my cell phone it would make continual popping sounds when it tries to lock in on either blue tooth or the line input.   

If it is paired and then turned on it will pop once and lock and the blue indicator light would come one, then I can unpair it and use the line input.   

If anyone has this amp please let me know if yours behaves the same way or not.   If this is in the design, this amp should probably be avoided unless you are definitely only using blue tooth.


David

wushuliu

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Re: TPA3251/55 High Power Class D Amplifiers
« Reply #85 on: 16 Jul 2018, 05:20 pm »
I would avoid any cheap chinese amp with blue tooth unless that's the feature you need or sound quality is secondary. The more chips/features are added the more noise there will be to the system and any software programming involved will likely be subpar.

davidldl

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Re: TPA3251/55 High Power Class D Amplifiers
« Reply #86 on: 17 Jul 2018, 10:27 am »
It is behaving better now,  I had 'ended my connection', It looks like I just had to 'Forget' the bluetooth connection on my phone.   

David