Uh huh.
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Hegel H95 Review (Streaming Amplifier)
- Thread starter amirm
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Uh huh.
xiaojinglf
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Hegel made at least two mistakes in cable handling:
1/ The two speaker output cables are bundled together, resulting in crosstalk between the two channels (especially with high power outputs).
2/ The DAC output signal line, which is not shielded, and the in-unit power supply system may interfere with the DAC output signal (which may be one of the reasons for the poor signal-to-noise ratio of the DAC output), and this signal line also spans the speaker output lines and terminals (which may result in serious interference with high power output).
In response to these two problems, I decided to take measures myself to adjust and improve it:
1/ I will measure and classify the signal types of each of the 5 DAC output wiring harness cables. And increased shielding for them.
2/ Separate the two speaker wires.
1/ The two speaker output cables are bundled together, resulting in crosstalk between the two channels (especially with high power outputs).
2/ The DAC output signal line, which is not shielded, and the in-unit power supply system may interfere with the DAC output signal (which may be one of the reasons for the poor signal-to-noise ratio of the DAC output), and this signal line also spans the speaker output lines and terminals (which may result in serious interference with high power output).
In response to these two problems, I decided to take measures myself to adjust and improve it:
1/ I will measure and classify the signal types of each of the 5 DAC output wiring harness cables. And increased shielding for them.
2/ Separate the two speaker wires.
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I don’t think the DF is this products biggest problem. In practice the output transistors are not bolted to one driver in our speakers.
DF is just an arbitrary definition of the inverse of the output impedance is it 8ohm/output impedance ?
Once you have a practical setup. With speaker cables and passive crossover components they will dominate the impedance seen by the speaker once the DF gets around 100 or better probably less in most cases. So 400 or 2000 is practically the same with real world passive speakers
Hegel seems to have numerous other issues, most obviously the designers believers in mysticism and hifi folklore at the core of most of thier designs like negative feedback is bad etc . With that unscientific aproach all products are going to get compromised and or much more expensive than needed. So there is no need to delve into details , ofcourse they will miss some wiring mistakes or other obvious issues if they are pre occupied with nonsense ?
Drivel. https://www.hegel.com/en/technology/
DF is just an arbitrary definition of the inverse of the output impedance is it 8ohm/output impedance ?
Once you have a practical setup. With speaker cables and passive crossover components they will dominate the impedance seen by the speaker once the DF gets around 100 or better probably less in most cases. So 400 or 2000 is practically the same with real world passive speakers
Hegel seems to have numerous other issues, most obviously the designers believers in mysticism and hifi folklore at the core of most of thier designs like negative feedback is bad etc . With that unscientific aproach all products are going to get compromised and or much more expensive than needed. So there is no need to delve into details , ofcourse they will miss some wiring mistakes or other obvious issues if they are pre occupied with nonsense ?
Drivel. https://www.hegel.com/en/technology/
xiaojinglf
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- Because I just found this post recently, I am more interested, because I happen to have this machine, I disassembly the H95, I found that the variable line output terminal signal from the electronic volume control chip njw1159 buffer output terminal, that is, the variable output terminal has a buffer measure. However, the volume is turned up to the maximum, whether the input is digital or analog input (no input signal), the ear is close to the speaker treble unit within a few centimeters, you can hear a slight thermal noise. Therefore, it is suspected that the influence of the signal-to-noise ratio may be the electronic volume control chip.
OP
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Very good news: it is almost guaranteed that it is your evaluation method for fidelity is broken. Use controlled testing against another amplifier to calibrate yourself.
xiaojinglf
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- It was a surprise reply. I bought and used this machine a long time ago. I have taken it apart and carefully examined the quality of its wiring and components. If the nad 326bee data test is any good (I'll be looking to see if there's any evaluation data, and if there is, I'll take a closer look), I think it's now clear to me that the data measurement is not directly related to the actual sound quality.
killdozzer
Major Contributor
I think this thread is an excellent showcase for the old Twain's 'it's easier to fool someone than to convince him he's been fooled'.
Turbidity is a new audio term for me. Like cloudy water.
Because you can read the manual and determine that for yourself and reasonable people can come to polar opposite conclusions. I'm not here for whether amir likes how the volume knob feels.
I'm not forced to make a decision that matches whether he recommends it or not - that's why the measurements are provided, not just a conclusion.
Guys please suggest me for a new Integrated AMP, I just sold my Hegel H95, and I am in the big big trouble. I am staying without any. Which one to buy now? I live in EU. Price range shpuld be similar to H95, but if is sound like it, I would definitely pay some extra cash for a better one!!! I was thinking to try Musical Fidelity M6si, but a lot people says it has clipping problems.
Be adventurous, save much and try one of the PFFB amplifiers from Fosi or Aiyima, or even a pair if you want to bi-amp. That should leave you with money in the bank for a matching pre-amp, such as the Fosi P4 or ZP3 - the latter if you prefer XLR to RCA. In today's market there is no need to spend vast sums on an amplifier to get great sound - see the reviews on ASR.
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Audiophonics HPA-INT450ET
2x Purifi 1ET6525SA
2x230W @ 8Ω, 1% THD
2x450W @ 4Ω, 1% THD
1790 €
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That is (sold as) a power amplifier.
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It can be if connecting line 4 bypass input, but it's an integrated amp.
AUDIOPHONICS HPA-INT450ET Integrated Amplifier
Audiophonics is proud to present the HPA-INT450ET. This Class D integrated amplifier relies on a pair of Purifi 1ET6525SA amplifier modules.
www.audiophonics.fr
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If there are no tone controls or other EQ capability, it's a power amp with a volume knob IMO. Also, that Hegel could stream, so there's that too...It can be if connecting line 4 bypass input, but it's an integrated amp.
AUDIOPHONICS HPA-INT450ET Integrated Amplifier
Audiophonics is proud to present the HPA-INT450ET. This Class D integrated amplifier relies on a pair of Purifi 1ET6525SA amplifier modules.
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Well neither can the mentioned Musical Fidelity...maybe it's not a must.
Feel free to ignore my suggestion if tone controls are needed.
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...or if streaming is needed.
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yeah, no way to add a streamer...
Cheers Bruce
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Right back atcha.
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Not knowing which speakers you have will make a difference on suggestions, FWIW. Personally I'd go with Langdorf for the room correction.
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