So it most likely will break before reaching 134 dB? Can manufacturers determine breakdown SPL rating spec for headphones?Note: the continuous power rating of the HD 800 S is 0.5W, the AHB2 will be able to deliver 2.2W continuous.
So it most likely will break before reaching 134 dB? Can manufacturers determine breakdown SPL rating spec for headphones?Note: the continuous power rating of the HD 800 S is 0.5W, the AHB2 will be able to deliver 2.2W continuous.
If you mean SPL at rated maximum power that is easily calculated if sensitivity in dB SPL at 1V and impedance or SPL at 1 mW are known.So it most likely will break before reaching 134 dB? Can manufacturers determine breakdown SPL rating spec for headphones?
The output voltage limitation was due to the HE adapter. The adapter is a voltage divider. It attenuates the signal. The Topping was tested without the adapter, but the AHB2 was tested with the adapter. The AHB2 actually puts out quite a bit more voltage, but the HE adapter was attenuating the signal to a level that was lower than the output of the Topping.Did the AHB-2 trip its limiter when attempting to drive the headphones prior to reaching its rating of ~28V RMS? An intelligent protection system (such as what is built into the Benchmark) in a power amplifier will not only detect excess current, but also high voltage swing with low current such as a 65R load would present.
In other words, it was limiting drive so as to not swing a high voltage, unloaded (65R is no load in real terms) output.
Thanks for catching this error! The page has now been corrected to reflect Sennheiser's published specification (102.0 at 1 Vrms). This removes the HD 800 S from our list of headphones that could be driven somewhat "safely" by the AHB2. The AHB2 could easily let the smoke out of the HD 800 S. We all know they don't sound very good without the smoke.yep, HPA4 = 131dB (balanced) and 126dB in SE mode.
So it most likely will break before reaching 134 dB? Can manufacturers determine breakdown SPL rating spec for headphones?
The output voltage limitation was due to the HE adapter. The adapter is a voltage divider. It attenuates the signal. The Topping was tested without the adapter, but the AHB2 was tested with the adapter. The AHB2 actually puts out quite a bit more voltage, but the HE adapter was attenuating the signal to a level that was lower than the output of the Topping.
It was JIW who noticed it and saw an oopsy from me as well.Thanks for catching this error! The page has now been corrected to reflect Sennheiser's published specification (102.0 at 1 Vrms). This removes the HD 800 S from our list of headphones that could be driven somewhat "safely" by the AHB2. The AHB2 could easily let the smoke out of the HD 800 S. We all know they don't sound very good without the smoke.
Benchmark NL4-XLR4 Headphone Adapter Cable for AHB2 Power Amplifier
NL4 to XLR4 Headphone adapter cable for use with power amplifiers. This cable provides a connection from the NL4 SpeakOn outputs on an audio power amplifier to the XLR4 input of a balanced headphone cable. This should only be used with low-sensitivity headphones that require large drive voltages.benchmarkmedia.com
You had post #1000 and used it like that... How could I let that standIt was JIW who noticed it and saw an oopsy from me as well.
Let's say you have dreamed of this wonderful headphone for a long time, read all the raving reviews many times over and finally pulled the trigger and got them with two year payment plan. When you have them at your home you spend a couple of hours just sitting in front of them, admiring how they look like on different stands. You have already chosen the ONE amp that will do justice to this masterpiece and when you finally plug it in and play your favorite song you are going to hear something magnificent, regardless of what the headphones actually sound like.I don't get the reason behind 90% of what being discussed very very rigorously here, a very expensive headphone turned out to be technically mediocre compared to its cheapo sibling and the all hell breaks loose. But hey the plus side is that ASR got a lot of traffic and I get to enjoin popcorn.
buying headphones on plan is not really a good ideaLet's say you have dreamed of this wonderful headphone for a long time, read all the raving reviews many times over and finally pulled the trigger and got them with two year payment plan. When you have them at your home you spend a couple of hours just sitting in front of them, admiring how they look like on different stands. You have already chosen the ONE amp that will do justice to this masterpiece and when you finally plug it in and play your favorite song you are going to hear something magnificent, regardless of what the headphones actually sound like.
In the following months you share dozens of pictures of the headphones in different settings, with various cables, all which reveal the magic in different ways, in hobbyist forums. You got together in threads with other serious audiophiles (1st class) who have climbed the mountain and achieved the Susvara experience. You really feel you have arrived at the peak audiophile. It did hurt but it was worth it in the end.
...now, some dude measures the thing and concludes without much drama that "it looks and feels nice but kind sucks as a headphone, next one please".
If you are a human being, I think it would be very, very hard to just shrug this off with "oh boy, I really got bamboozled there, damn those loveable Hifiman rascals."
As for myself, I demoed these just couple of months back without much expectations on way or another. Only could be bothered for a few minutes with them because: nothing terrible, didn't hurt my ears, just plain old "not interested to hear these ever again" feeling. If I hadn't promised myself to stop buying more headphones for no reason I could buy a pair for something like 500€ just for the design and as a conversation piece.
MS Copilot says:How can I volume match Zero7 IEMs to Susvara? I'm outputting 210mV 1kHz sine test signal from amp to Susvara, it is around 82dB, what voltage I need to set to get the same SPL for 7Hz Salnotes Zero? Thank you.
Manufacturer sensitivity ratings are nowhere near accurate enough to do it this way. Not even close, you could be an order of magnitude off. You won't get an accurate volume match like this, worse if you try it and convince yourself you do have one because you followed a process.Therefore, you need to set the output voltage of your amp to 6.3 mV to get the same SPL for the 7Hz Salnotes Zero IEMs as the Hifiman Susvara headphones."
Is the "AKG K120" the correct model number? When looking it up, I found this: "AKG introduced its first headphone, the K120 DYN, in 1949." Did AKG reuse the old model number, or is it typed incorrectly in your post?Some HP's that might apply to the list:
AKG K1000 (86dBV, 155ohm)
MyST Izo-OS (89dBV, 28ohm)
AKG K120 (90dBV, 600ohm)
Beyerdynamic DT660 mk2 (93dBV, 600ohm)
HE-5LE (95dBV, 40ohm)
Is the "AKG K120" the correct model number? When looking it up, I found this: "AKG introduced its first headphone, the K120 DYN, in 1949." Did AKG reuse the old model number, or is it typed incorrectly in your post?