dsnyder0cnn
Addicted to Fun and Learning
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Sure, but I don't understand the 3.8 and 12.6 numbers. What are the units? Or is this a ratio?Av? Gain by any other name
Sure, but I don't understand the 3.8 and 12.6 numbers. What are the units? Or is this a ratio?Av? Gain by any other name
It's the gain expressed as voltage ratio.Sure, but I don't understand the 3.8 and 12.6 numbers. What are the units? Or is this a ratio?
First, try DX9 Low gain and B200 Low gain.what do you guys think is the best setting high or low gain
Yes i found that to be the best option thanks for your response wasn't sure how to properly set gain i tried both in low gain but was to low and high gain on amps was ok but did'nt seem to work as well have'nt tried both dx9 and amps in high gain but don't think that would be the best i had a pre90 which would have been just plug in and play but i sold these with the original d90First, try DX9 Low gain and B200 Low gain.
If it's too quiet even with the DX9 set to max volume, set the DX9 to High gain.
DX9 in High gain has enough output voltage to max out the B200 in Low gain.
Ye well it aint Audiophonics confirmed that both units were broken.Sure that's not just because it's a Focal headphone? Many report driver clipping with them. Assuming that is what that is.
Man does this thing get toasty...kind of scary.
Hi,Received my 2 B200s today. First one on bench putting about 40W into 4 ohms. Man does this thing get toasty...kind of scary. Also on the DC plug on power supply that goes into back of amp the outer ring was smashed and would not thread on at first. I had to reform it with a pair of pliers.
@TOPPING
@TOPPING-Service
Made me think I got a unit returned by another customer...hopefully not. I got 2 and have not even unboxed the second. I will test it also.Regarding the smashed DC socket. We would investigate the cause and try to prevent it in the future.
Hello Mr Topping and welcome to the forum,Hi,
40w into 4ohm continuous is not small amount of power. So the thing getting hot is normal. It's difficult to say without measured temperature. There's over temperature protection implemented and tested, so nothing really to worry about. LA90D and B200 have gone through 50C test.
It's class AB/B at the end of the day so they are quite inefficient.
Due to the crest factor, when playing music the average power is much lower.(it should be lower than 40W even running at maximum peak output) So B200 will not get hot in regular use. Even when they get hot as long they aren't shut down, they are fine.
Regarding the smashed DC socket. We would investigate the cause and try to prevent it in the future.
B200 is the basically an LA90 Discrete that's optimized for bridged configuration only. Gain structure and values are re-tuned for lower noise. PCB layout was tweaked a little to reduce magnetic field coupling in the chassis slightly for lower THD.Hello Mr Topping and welcome to the forum,
Iam an extremely happy owner of the la90 of some 18 months now and have no desire to go back to my other amplifier costing ten times more!
Could you tell us more about the sound differences with these B200 v la90, obviously more headroom, is the chip a newer generation then? Thank you.
We tested it by tapping the ring on the plug with an adapter chassis and we were able to replicate the situation. This should be the case, the plan is to probably add a sleeve to future packaged plugs if the box space allows it.Made me think I got a unit returned by another customer...hopefully not. I got 2 and have not even unboxed the second. I will test it also.
One question that keeps popping up ever since the LA90 was launched is why the horizontal cooling fins?B200 is the basically an LA90 Discrete that's optimized for bridged configuration only. Gain structure and values are re-tuned for lower noise. PCB layout was tweaked a little to reduce magnetic field coupling in the chassis slightly for lower THD.
LA90 was using integrated Op-amp and Chip-amp in NFCA circuit. LA90 Discrete takes the idea and implemented in discrete fashion plus some extra goodness. The result is a bit more power and a bit lower noise and a bit less high frequency distortion than LA90.
TLDR LA90 was last gen. LA90D is slightly better and B200 is slightly better still.
Hi! How it s sound, comparing to pa7 plus?Hi am new to the forum bought 2 from Aoshida hifi uk took 6 days for delivery hooked it up to my DX9 what do you guys think is the best setting high or low gain also had a PA7 Plus which was also a fantastic amp