Hi all
I have question regards this gain - power - sinad topic.
After review here I've bought Behringer A800.
I'm using it with desktop monitors and usb sound card with analog volume control via balanced connection and I'm very happy with it. I don't need all that power and as at max positions of Behringer's controls I can hear hiss in quiet conditions through tweeters I've reduced gain to 10 o'clock. I adjust volume using sound card pot and it still can be more loud than enough, and hiss has gone.
Is it true that by reducing gain on Behringer(or every other amp) but losing max power, I also increased SINAD and other parameters?
Is is now similar situation like here with lower max gain amp like Sylph-D200? So lower amp gain need to be compensated by higher source voltage?
thx for confirmationyes that is the expected results, as long as the DAC can still push the speaker to the desired volumes (at the low gain settings) then lower gain will reduce noise.
Interface spec says +12dBV max for balanced output.
It's good to have options. As an easy example, the MOTU Ultralite which ASR recently reviewed gives best performance at ~7.5Vrms (+11dB versus 2Vrms). Best gain with a 100W amp would be ~12dB. A typical amp with 29dB gain must make >5kW to avoid clipping. Far from ideal.For me it's ok as long as it's within range of most DAC's output.
But hardly with this cooling... Just a few loose thoughts:300W is at higher distortion. You can easily have 200W per channel <1%.
But hardly with this cooling... Just a few loose thoughts:
Not being a fan of fans and their noise, the thing that bothers me a bit about many "chip amps" from several manufacturers, are the "miniature" radiators. A decent size radiator would eliminate the need for a fan, and provide lower operating temperatures, prolonging the life of the chip(s), wouldn't it? Having a small enclosure is fine, but it's not really difficult to place a radiator on the side, or top of an enclosure, with free airflow, so much better than inside the box. May need a heatpipe in some cases. I would pay the extra "20$".
An example of the principle i'm referring to, no amp, a PC, but just to demonstrate the idea:
https://www.goldfries.com/hardware-reviews/streacom-fc8-alpha-fanless-casing-review/2/
Chip. So can be very very very different.So just confirm, is the TPA3255 the chip or the whole module?
I am trying to understand if I see another module with a TPA 3255 does that mean it's the same module as the one above or its only one part of it and the module is a specific design around the TPA3255? Hence every module being different and measuring different.
We have an EU partner to provide the complete / cased amplifier but it may take some time to go into production..
Good job JLE for keeping with the EVM concept and trying to make it better. Hard to beat what TI did with that EVM.
Hi JohnYang,Hi. This doesn't make sense to me. Clipping voltage is bounded by the supply voltage of the opamps. If any, higher gain will bypass the input common mode range and give a bit higher output level for RRO opamps like opa1656.
Allo seems determined for its pending TPA3255 product to surpass rather than duplicate the TI EVM's performance -- not an easy goal, but their TPA3116 product certainly proved they can do things like that, so I'm looking forward to see what they can accomplish given a far more capable chip.
I've seen some measurements done by their engineer in DIYAudio and it looks impressive. They will be using ultra low noise main power supply if I'm not mistaken.
I am having a mind debate about this package and an "old" Hypex UCD400HG HxR Stereo kit. How much is this preassembled kit? My Hypex kit was for my surrounds and want to put my finger on whether this one here would be a better value or the UCD kit. Mainly because I noticed the specs look somehow close if you discard the lower gain of this reviewed amp. Hypex Kit was about 600 € (700$) btw.