I use LA90 as power amp, controlling volume by DAC. Even if I accidentally turn on the DAC at 00db (5V), there won’t be any clipping with low gain.according to the doc it is 2.2V in High Gain which is ridiculously low for balanced XLR no ?
I use LA90 as power amp, controlling volume by DAC. Even if I accidentally turn on the DAC at 00db (5V), there won’t be any clipping with low gain.according to the doc it is 2.2V in High Gain which is ridiculously low for balanced XLR no ?
Before the first firmware upgrade booting was unstable. The firmware upgrade must be done on windows only and with an usb A -> usb C cable (not documented). besides that it is working perfectly since 1 month...Is this amp supposed to be more reliable than a pa5? I didn't want to spend this much for amps for my secondary setups but I'm sick of dealing with pa5 failures.
Right now I've repurposed ahb2's from my home theater setup into my office and bedroom but want to move them back.
What do you mean by recent batches of Purifi ? Is that mean there been any problem with old batches ?I believe amps like the Neurochrome MODULUS series, the recent batches of Purifi and NCore modules, and the Benchmark AHB2 are endgame if you want fidelity. Numbers prove this. If someone wants color then it is another matter.
What do you mean by recent batches of Purifi ? Is that mean there been any problem with old batches ?
I have Audiophonics Purifi mono amps and that's why I'm asking. I bought them in the first half of 2021.
If such exists, I respectfully request a link referencing a coming Topping higher powered Class AB amp. TX!Waiting for the L12 series...
1200 US $
120 dB
120 W
I still find none yet to guide you onto, but engineers are happily earning their hard earned money and are always keen to realising their dreams, be it as AB, D or whatever, a fact to add to Christmas being again around the corner...If such exists, I respectfully request a link referencing a coming Topping higher powered Class AB amp. TX!
Some people should write to Santa. He really can save their hard earned money.I still find none yet to guide you onto, but engineers are happily earning their hard earned money and are always keen to realising their dreams, be it as AB, D or whatever, a fact to add to Christmas being again around the corner...
I was selling this amplifier made in a small-lot production in 2011 at $2500. You speak about arm chair engineers, may I humbly ask if you are a real engineer? In what field?
View attachment 202479
Description
Solid state, dual mono design, stereo power amplifier. Inputs: 1 pair balanced (XLR). Outputs: 2 pairs binding posts. Protection circuits: DC output, AC current overload, DC current overload.
Specifications
- Output power 2 x 300W/4 ohm, 2 x 150W/8 ohm
- Input impedance 94kohm balanced
- Frequency range 0.5Hz - 130kHz (-3dB)
- Harmonic distortion <0.03%/100W/8 ohm
- CCIF 19+20kHz intermodulation distortion <0.03%/40Vp/8 ohm
- Slew rate >80V/us
- Gain 27dB
- Dimensions 450 x 440 x 190mm
- Weight 30kg approx.
I find it incredible how religion also wants to take root in the world of science. And so we are faced with people who can swear on their loved ones to hear a difference day and night between two amps at -100 and -121db when they normally wouldn't be able to hear distortion at -50db (and I swear, it's really hard to recognize. ....)You are making an assumption that what you do not hear does not affect the music you are listening to.
If on your room calibration software you cut off all frequencies above 17K, It will sound different than if you let it go all the way to 20k. This is despite the fact that you can not hear anything above 17K. It is because those frequencies do affect the total sound. Hence noises at levels you do not hear do effect the frequencies and music you are listening to.
Waiting for the L12 series...
1200 US $
120 dB
120 W
I simply said I was to wait for the next Topping power amplifier, which is assumed to be better, more powerful and more expensive.Which L12 series are you talking about ? Which brand ? Unless we have to read back full pages of this thread, your post is somehow mysterious.
lm3886 can be this poweful? big negative feedback? some $50 amp using the same chip
The device used for LA90 is TI's LM3886.Are LA90 output transistors SMD's? Are the output transistors MOSFET or bipolar? TX!
How a 92db SNR chip can deliver 120db SINAD ?The device used for LA90 is TI's LM3886.
High performance is achieved with this chip and multiple NFBs.
The LM3886 case can be purchased for around $5~$10.
See datasheet for details.