Benchmark AHB2 design

[voodooless]

And amp clipping or not is just a matter of gain. If your lucky and you can’t let it clip, your probably not able to push it all the way.

 

[voodooless]

The difference is that people aren't universally saying all AB and A are great just because the Benchmark AHB2 is great. But it appears that some are misled to think all class D is great because Purifi and Hypex is great. And some posts on ASR almost reads class D = Purifi and Hypex.

Nobody says this. It’s just a giant straw man you built there.

All I am doing is pointing out that ONLY Purifi and Hypex's are considered objectively great amps in the world of class D. All other class are not great, many are shit (to borrow your term).

This not true either. There are plenty of great other Class D designs out there.

 

[jmdesignz2]

The difference is that people aren't universally saying all AB and A are great just because the Benchmark AHB2 is great. But it appears that some are misled to think all class D is great because Purifi and Hypex is great. And some posts on ASR almost reads class D = Purifi and Hypex.

All I am doing is pointing out that ONLY Purifi and Hypex's are considered objectively great amps in the world of class D. All other class are not great, many are shit (to borrow your term).

Here’s another fact

The AHB2 would be unsuitable for more speakers and use cases than Ncx500

Add in the price delta and the difference is even more stark

 

[mdunjic]

I also want to discuss this a bit here. Class D amplifiers has been around for decades but Hypex and Purifi perfected the class D topology for their products and their products only.

Sometimes reading some ASR posts, some people think class D is this almighty new topology and it almost appears as if some people now universally accept that all class D are great performing.

There is a different between Hypex and Purifi's class D and all other class D, where some of them, the switching noise are indeed audible.

We can make similar argument for THX-AAA - perfected feed-forward for their own products only ... but they, Like Purifi and Hypex, are more than happy to sell or license it to others ... not sure I understand the point

 

[PristineSound]

Nobody says this. It’s just a giant straw man you built there.

Maybe you haven't seen anyone who said or imply this and you know better to not to do so. But the casuals do and I have encountered many times. They talk about class D as if it's something new and talk about it as if class D is the second coming of Jesus.

This not true either. There are plenty of great other Class D designs out there.

Well, define "great" the only other one I can think of is Pascal, maybe some of the chip amps, like Infineon and TI, but those aren't objectively great, maybe good.

 

[PristineSound]

The AHB2 would be unsuitable for more speakers and use cases than Ncx500

? Explain. Provide examples.

My AHB2 can drive any reasonable speakers in a reasonable sized room to a reasonable SPL level.

 

[mdunjic]

Are you serious?

Or are you deliberately misrepresenting what I’m saying?

A clipping amp most definitely would damage speakers

I am also surprised by some of the statements and claims on this chat ... showing lack of understanding of basics ... it's very well known fact that underpowered amp can definitely damage speakers due to clipping ... the question is what 'underpowered' means ... depends on speaker sensitivity, room size / volume, etc, etc ... for many, benchmark AHB2 may be perfect amt of power, for others may not

So some of the posts make good sense to me and then I get surprised by complete nonsense ... at least I am entertained for now

 

[voodooless]

objectively great

What is that defined as then?

 

[PristineSound]

No sir. That’s not correct

Put two amps AHB2 in stereo stock configuration vs hypex ncx500 mono blocks head to head into 87db 4-6ohm speakers and listen to orchestral performances with peaks of 106db at 10ft

The AHB2 Would clip due to being underpowered and possibly damaging the speakers

Those are facts

First, I challenge this.

The AHB2 is capable of 256w into 2 ohms, and stable in 2 ohms. Depending on your speaker sensitivity and room size (volume), it is able to push up 106dB peaks at 10 ft.

Second, you are referring to pushing the amp to the limit such that it clips. All you said originally is underpowering it, you said nothing about pushing the amps to clipping.

 

[jmdesignz2]

? Explain. Provide examples.

My AHB2 can drive any reasonable speakers in a reasonable sized room to a reasonable SPL level.

I gave you a specific example

Are you a bot?

 

[pablolie]

...

My AHB2 can drive any reasonable speakers in a reasonable sized room to a reasonable SPL level.

I would also think the same. All these amps seem to have power to spare for most audio shrines, IMO. In fact, I have no use for the power levels they produce, personally, but I have no doubt others may.

 

[PristineSound]

Are you a bot?

Listen, if you are going to get confrontational, the report button is just one click away.

 

[PristineSound]

What is that defined as then?

At least on ASR, Amir categorized 95dB SINAD at 1kHz, as flaw as this metric may or maybe be.

 

[pablolie]

At least on ASR, Amir categorized 95dB SINAD at 1kHz, as flaw as this metric may or maybe be.

It's not in any way the only measurement he provides. There are always sweeps there for THDN as well.

 

[jmdesignz2]

Listen, if you are going to get confrontational, the report button is just one click away.

Then why are you ignoring specific examples?

 

[PristineSound]

I would also think the same. All these amps seem to have power to spare for most audio shrines, IMO. In fact, I have no use for the power levels they produce, personally, but I have no doubt others may.

I listen to an average of 73dB to 78dB from about 7/8 feet away. My speaker sensitivity is a about 92dB, anechoic. My room volume is fairly large (about half of my basement) and it's well treated, so in room sensitivity is relatively low.

At the SPL I listen to, the SPL is more than enough, I can't imagine anyone wanting to listen at a higher SPL than that. Anything more than that hurts my ears.

I remember you saying something like you still have up to 17kHz hearing? Well, maybe that's the reason why you can still hear 17kHz.

Anyway, my Benchmark is more than enough with significant amount of headroom for my needs, I have been able to push it to 90dB average from the same parameters above, with plenty of headroom left; I only did 90 for few seconds to test how loud my system is capable of.

 

[mdunjic]

I listen to an average of 73dB to 78dB from about 7/8 feet away. My speaker sensitivity is a about 92dB, anechoic. My room volume is fairly large (about half of my basement) and it's well treated, so in room sensitivity is relatively low.

At the SPL I listen to, the SPL is more than enough, I can't imagine anyone wanting to listen at a higher SPL than that. Anything more than that hurts my ears.

I remember you saying something like you still have up to 17kHz hearing? Well, maybe that's the reason why you can still hear 17kHz.

Anyway, my Benchmark is more than enough with significant amount of headroom for my needs, I have been able to push it to 90dB average from the same parameters above, with plenty of headroom left; I only did 90 for few seconds to test how loud my system is capable of.

Well, with your speaker high sensitivity, you are then probably 'pushing' max 5w / ch out of your AHB2 even at 90+ db spl

 

[mdunjic]

Even more exact, for speakers of 92db sensitivity at 3m away listening position ... with 5w, you shall be able to get 95 db spl

 

[PristineSound]

Even more exact, for speakers of 92db sensitivity at 3m away listening position ... with 5w, you shall be able to get 95 db spl

View attachment 479637

I have a big room, and it's well damped. Floor to floor carpet, 6 inch think absorbers. So I would even reduce the gain from room.

But anyway, as one can seen, the AHB2 at 100 Watts per channel into 8 Ohms, both channels driven is more than sufficient for my needs and most use cases.

Now Amir had once mentioned how his monoblocks would run out of juice on him, he also mentioned that he has a loft that is huge, his loft must be huge. Erin also gloats about his McIntosh monoblocks, but from his videos, that guy seems to listen at very high SPL, I wonder how long his hearing can last him.

 

[mdunjic]

I have a big room, and it's well damped. Floor to floor carpet, 6 inch think absorbers. So I would even reduce the gain from room.

But anyway, as one can seen, the AHB2 at 100 Watts per channel into 8 Ohms, both channels driven is more than sufficient for my needs and most use cases.

Now Amir had once mentioned how his monoblocks would run out of juice on him, he also mentioned that he has a loft that is huge, his loft must be huge. Erin also gloats about his McIntosh monoblocks, but from his videos, that guy seems to listen at very high SPL, I wonder how long his hearing can last him.

Agree