The boards are definitely different. Even the amp configuration is. AFAIR, the 260-2-29A uses a single TPA3255, whereas the A5 uses dual 3251Are these ready made amps using the same DIY boards like 480-1-29A or 260-2-29A?
The boards are definitely different. Even the amp configuration is. AFAIR, the 260-2-29A uses a single TPA3255, whereas the A5 uses dual 3251Are these ready made amps using the same DIY boards like 480-1-29A or 260-2-29A?
Yep. Completely different layout. Different and supposedly superior output filter coils, too.The boards are definitely different. Even the amp configuration is. AFAIR, the 260-2-29A uses a single TPA3255, whereas the A5 uses dual 3251
If I remember correctly from the top of my head the original TI paper on PFFB shows the comparison of different coil types and the conclusion is: You can get the same performance out of cheaper coils or improved performance using the better coils. I would expect there to be further room for improvement over the reference design parts.The coils are an interesting story. The PFFB should render differences insignificant, but it does not because there is not that much loop gain.
OMG hallelujah! Finally! Haven't seen such in decades. I know the exact performance of the indicators (persistency and illumination etc) can be a rabbit hole but it's nice to be able to see if you are for instance into significant clipping. I kinda want to say if your amp never clips your speakers will 99.999% be fine...Clipping indicators are provided for each channel.
Did not work well for me. During gaming, it would auto-off on me, and when action happens it takes 2 seconds to turn on, completely ruining horror games. Rain and footsteps in games isn't enough to keep it on.
After some testing, I found that it will not auto-on with any frequencies above 4Khz.
Since there's no way to force the device on (unplugging and plugging power doesn't even work), it's unusable for me and I returned the device.
30 minute auto-off would have worked in this situation.
If you can clarify , is this with the A5 or the A7 ?Did not work well for me. During gaming, it would auto-off on me, and when action happens it takes 2 seconds to turn on, completely ruining horror games. Rain and footsteps in games isn't enough to keep it on.
After some testing, I found that it will not auto-on with any frequencies above 4Khz.
Since there's no way to force the device on (unplugging and plugging power doesn't even work), it's unusable for me and I returned the device.
30 minute auto-off would have worked in this situation.
Faulty?Does having 12v trigger connected bypass the faulty auto on-off on the a5/a7 that I’ve been hearing about
Whatever you want to call it.Faulty?
It’s not faulty, it’s just to a lower level than some of the users need.
There is no trigger input.Does having 12v trigger connected bypass the faulty auto on-off on the a5/a7 that I’ve been hearing about
If anything, I would expect the removal of the trigger input to improve the measurements.When amirm had the Prototype A5 with a 12v Trigger to review, i am question now if this autotrigger could influence the thd, sinad and so on from the produktion model negative?
You can see here (scroll down):
(the outside pictures are already without trigger, but the picture showing the PCB still has the trigger in the upper right corner)
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3E AUDIO A7SE Amplifier
3E Audio, a recognized player in the DIY world, now offers a Class D Stereo amplifier incorporating audiophile Hi-Fi components. The A7se amplifier is based on a TI TPA3255 chips in BTL configuration, and two dual OPA1612A OPAs.www.audiophonics.fr
Agreed. And if they make it more sensitive they will have complaints from other people about them never turning off, or turning on unexpectedly. There is no sensitivity that is correct for all situations unfortunately, which many other companies have run into when trying to implement automatic power on/off. An adjustable sensitivity should work for most people, but even then some with interference issues may have trouble finding an acceptable sensitivity. Some people need something like the trigger to override the automatic power control.It's really unfortunate TBH that 3e removed the 12V trigger... other amp companies have gone back to having a trigger in addition to auto on/off. For the same reasons a few have mentioned here... gaming and movies, where in quiet passages the unit is turning off.
3e should put it back for the next round of models... I think most would be happy to pay another $10 - $20 for this feature.
JSmith
Honestly, not me.I think most would be happy to pay another $10 - $20 for this feature.
Not Fosi with their V3 Mono. I didn't follow what kind of problems people had with the sensitivity of these being to high, they just work as intended I both setups I tried them with.... other amp companies have gone back to having a trigger in addition to auto on/off.