NEW O-NOORUS D4 (TPA3255 PFFB / HDMI ARC / ES9023P)

[daniboun]

Hi amigos,

It seems that O-NOORUS has made the answer to the new Aiyima A80 ))
The O-Noorus D4 comes with some OPA1642 op amps and PFFB inside

Price : $119
At this price, I think it will be very promising. On the other hand, I have doubts about the announced performances given its PFFB implementation.

 

[TonyJZX]

this looks like amazing value yet again

a few points... no remote so you will need something upstream

but if you have something upstream then why do you need a dac inside this?

i think the dac and bt are essentially convenience features at this point - not really anything you would use day to day but maybe in an emergency

the ess9023 is a 24/192 part i beleive

obviously many of us are purists and we would happily lose the tone and digital section completely

ALSO I would note that $119 INCLUDES the 48v 5a psu so there's some value add there

$10 less for 36v 5a (why bother?)

$20 less for no psu (so do they value a 48v 5a at only $20????)

to me this looks like a battle between the D1 which has remote and display but you lose all the digital section and this one which is in the inverse

ALSO both have fixed 80hz sub cut i beleive? but no way to control the main speaker cut off?

 

[bolo_nz]

Been lurking for so long and it just seems like they're just going in circles purposely not giving people what they want. Every thread on Chinese amps has people telling companies what they want but they just continue to ignore it.

Why even have low pass when you don't amplify the sub channel?

Oh because some people use amps without low pass filter?

Then why have it fixed at 80Hz?

Mind boggling.

 

[Chr1]

I would take those specifications with a grain of salt. There is currently an ongoing thread about how they are often completely unrealistic.
Saying that it is cheap, so not a huge risk. My 2c.

 

[Alexander Lin]

Been lurking for so long and it just seems like they're just going in circles purposely not giving people what they want. Every thread on Chinese amps has people telling companies what they want but they just continue to ignore it.

Why even have low pass when you don't amplify the sub channel?

Oh because some people use amps without low pass filter?

Then why have it fixed at 80Hz?

Mind boggling.

What do you suggest?
Is the subchannel cutoff frequency adjustable, or is it full frequency?
Removing a capacitor on D4 can turn it into full-range.

This will help us design D3 PRO. It will be mass-produced soon.

 

[TonyJZX]

i'm ok with 80hz

this is a throwback to old AVRs where small and large where defined by greater or less than 80hz... its a compromise where it works for maybe 75% of people

i also think its hard to actually implement a variable cut off unless you do it as a menu function like on a D1

to do this with knobs is really a pain

but yeah a menu function where you can define variable cut off for the sub AND the main speakers would go very far

I mean not even the majors like smsl topping aiyima etc can do it

I tell you who can do it... Arylic... but they do it with an app.

I would also be suggesting a vol trim for the sub channel but again this isnt a feature than can be implement on the above device in a functional manner unless you have a screen and menus and a remote.

 

[Alexander Lin]

i'm ok with 80hz

this is a throwback to old AVRs where small and large where defined by greater or less than 80hz... its a compromise where it works for maybe 75% of people

i also think its hard to actually implement a variable cut off unless you do it as a menu function like on a D1

to do this with knobs is really a pain

but yeah a menu function where you can define variable cut off for the sub AND the main speakers would go very far

I mean not even the majors like smsl topping aiyima etc can do it

I tell you who can do it... Arylic... but they do it with an app.

I would also be suggesting a vol trim for the sub channel but again this isnt a feature than can be implement on the above device in a functional manner unless you have a screen and menus and a remote.

Yes, the sub-channel volume and cutoff frequency are adjustable, which can be achieved with the help of the display.

 

[ICIETDIYEUR]

Hello bolo_nz.

I'm trying to understand your expectations a little better because you're right when most people use an amplified SUB-WOOFER that itself has level and low-pass filter settings (e.g. from 40Hz to 80Hz) and sometimes even a phase reversal (while you're at it...).

But several cases can arise:
1> the SUB-WOOFER is as I just described, but most people don't own an amplifier with a built-in adjustable high-pass filter, right ?

2> As most of these people have a 'traditional' amplifier, they then equip themselves with a SUB-WOOFER to which the source(s) are connected and it has a device to send the signal back to the main amplifier with a built-in adjustable high-pass filter.

3> A SUB-WOOFER is used in addition to the main speakers because their characteristics do not allow them to 'go down' in the bass.
An amplifier such as the D4 O-NOORUS is then used to connect the SUB-WOOFER.

4> Most SUB-WOOFERs on the market have at least one level control, so what might be missing would indeed be a possible low frequency setting (the 'range' of which would be determined) on O-NOORUS amplifiers that have the possibility to connect a SUB-WOOFER.

Did I understand your expectations correctly ?

Maybe I forgot things too ?

NB: Let's not forget that we are talking about amplifiers that are very accessible although also very 'complete' for the general public ($119 INCLUDES the 48v 5a psu) and not a TRINNOV

 

[bolo_nz]

What do you suggest?
Is the subchannel cutoff frequency adjustable, or is it full frequency?

This will help us design D3 PRO. It will be mass-produced soon.

Like what many have asked in the D1, D3 and D4 threads:

Adjustable high pass filter for mains with usable range (40Hz to 120Hz for example)

Adjustable low pass filter for sub with usable range (40Hz to 120Hz for example)

If we can't have both then high pass filter for mains is preferred for the majority since we assume people buying the "PRO" already have an active sub or dedicated sub amp with crossover control.

We (the consumers) do appreciate when the designer/manufacturers are trying to listen to feedback by the way!

 

[TonyJZX]

above is fine

i would say 5hz or even 10hz granularity is ok

doing it like this at in the digital domain where its applied across all input is the preferred way

you can do it - you just need to spend money on an 7.2 atmos receiver like i have in my theater room

but if you can do this on a low priced device then its a major step forward

again arylic have done it on their b50/bp50 but its not independent and for me, the app is kind of weird but the kids love apps these days

 

[Alexander Lin]

Like what many have asked in the D1, D3 and D4 threads:

Adjustable high pass filter for mains with usable range (40Hz to 120Hz for example)

Adjustable low pass filter for sub with usable range (40Hz to 120Hz for example)

If we can't have both then high pass filter for mains is preferred for the majority since we assume people buying the "PRO" already have an active sub or dedicated sub amp with crossover control.

We (the consumers) do appreciate when the designer/manufacturers are trying to listen to feedback by the way!

Thank you for your suggestion. You mentioned that D3 PRO cannot be added, but we will add it to future models.
However
----Adjustable high pass filter for mains with usable range (40Hz to 120Hz for example)
This will add some components, and we are worried that some noise will be introduced or the sound quality will be affected.
We will try to develop it and see the final effect.

 

[bolo_nz]

Hello bolo_nz.

I'm trying to understand your expectations a little better because you're right when most people use an amplified SUB-WOOFER that itself has level and low-pass filter settings (e.g. from 40Hz to 80Hz) and sometimes even a phase reversal (while you're at it...).

But several cases can arise:
1> the SUB-WOOFER is as I just described, but most people don't own an amplifier with a built-in adjustable high-pass filter, right ?

2> As most of these people have a 'traditional' amplifier, they then equip themselves with a SUB-WOOFER to which the source(s) are connected and it has a device to send the signal back to the main amplifier with a built-in adjustable high-pass filter.

3> A SUB-WOOFER is used in addition to the main speakers because their characteristics do not allow them to 'go down' in the bass.
An amplifier such as the D4 O-NOORUS is then used to connect the SUB-WOOFER.

4> Most SUB-WOOFERs on the market have at least one level control, so what might be missing would indeed be a possible low frequency setting (the 'range' of which would be determined) on O-NOORUS amplifiers that have the possibility to connect a SUB-WOOFER.

Did I understand your expectations correctly ?

Maybe I forgot things too ?

NB: Let's not forget that we are talking about amplifiers that are very accessible although also very 'complete' for the general public ($119 INCLUDES the 48v 5a psu) and not a TRINNOV

I think I didn't word my first post correctly!

I was meaning to say that having a high pass filter on the mains is much more preferable especially on a "PRO" model, most traditional amps still allow you to connect a sub or sub amp with crossover and phase control anyway.

What is the buyer is looking in something like the D4 or the upcoming D3 PRO?

After lurking for so long it comes down to a cut down WiiM AMP with high pass/low pass features and none of the fluff.

I don't think pricing being higher due to implementing high pass is an issue if its the feature people actually want! I'm still strongly considering the WiiM AMP PRO but it has many features I don't care for!

 

[harkpabst]

After lurking for so long it comes down to a cut down WiiM AMP with high pass/low pass features and none of the fluff.

I don't think pricing being higher due to implementing high pass is an issue if its the feature people actually want! I'm still strongly considering the WiiM AMP PRO but it has many features I don't care for!

The WiiM Amp and WiiM Amp Pro are - as you already know - all-in-one boxes, not traditional amplifiers. And they are applying the high pass and low pass filter in the digital domain, which is preferable, as mentioned by @TonyJZX: No additional components, no additional noise, very precise and gain independent filter slopes, applied to all inputs.

However, this approach requires the presence of some sort of DSP (the A53 SoC used by WiiM is easily powerful enough) and app control. By adding all that and factoring in the costs for software maintenance you will end up with a different price point than e.g. the D4.

Wishing for the option to enable a high pass filter with few parameter options still sounds legit to me. If low pass filtering is left to the active sub there is still the challenge of matching the slopes (usually not adjustable on most subs).

 

[bolo_nz]

The WiiM Amp and WiiM Amp Pro are - as you already know - all-in-one boxes, not traditional amplifiers. And they are applying the high pass and low pass filter in the digital domain, which is preferable, as mentioned by @TonyJZX: No additional components, no additional noise, very precise and gain independent filter slopes, applied to all inputs.

However, this approach requires the presence of some sort of DSP (the A53 SoC used by WiiM is easily powerful enough) and app control. By adding all that and factoring in the costs for software maintenance you will end up with a different price point than e.g. the D4.

Wishing for the option to enable a high pass filter with few parameter options still sounds legit to me. If low pass filtering is left to the active sub there is still the challenge of matching the slopes (usually not adjustable on most subs).

Agree with everything, will there be any manufacturers that can implement proper crossover/slope controls (high and/or low pass) with or without a DSP while keeping it at a certain price point?

 

[TonyJZX]

i feel like this is a example of perhaps asking McDonalds to make you the best fried chicken ever.

I dont go to McDonalds for their chicken... that's the wheelhouse of some other folks... from Kentucky.

To me they have made a decent product for $120 and its does a lot right but I wouldnt buy it as it does not 'push the envelope' in the way that suits my needs.

I was very happy to spend a mere $80 on the Arylic BP50 as I think its an interesting enough device that is trying to do things that I want 'stuff' to do.

I'm not sure that this company (or any of its competitors) are capable of satisfying the needs of people here.

A product like the BP50 is cheap because they leverage technologies from other Arylic products in their lineup that goes up to $400.

The other companies here do not have that experience. Now dont get me wrong... these products do not bench well at all.

So I do not hold this company into account for not providing stuff that suits my needs for even $250 or more.

Because no one else is.

To me I hope that more companies just make stuff like the D1 which is just analog PFFB stereo TPA3255 devices. I'm not expecting companies to cater directly to my needs. That's just reality.

 

[zeluxao]

I have a sabaj a30 pro and it has selectable crossover (hpf+lpf) without an app. It's expected that this will be the next incremental upgrade in these types of amps. It's just a matter of who will get to it first.

 

[ICIETDIYEUR]

Hi all

In fact you ask O-NOORUS with its D4 amplifier at 100 euros to perform the same functions as a SABAJ A30 pro at 600 euros ?

It's quite a 'challenge'

 

[harkpabst]

Hi all

In fact you ask O-NOORUS with its D4 amplifier at 100 euros to perform the same functions as a SABAJ A30 pro at 600 euros ?

It's quite a 'challenge'

It's even more of a challenge since there is no product named "Sabaj A30 pro" ...

I do know something like the Sabaj A30 a, selling for $500. Still a completely different price point.

I don't see such features in a $100 desktop amp for minimalistic systems. However, companies like WiiM have demonstrated how ancvanced DSP features and proper sub and mains filtering can be had at a price point somewhere in the middle.

 

[ICIETDIYEUR]

Hello

I think that Mr LIN, who is very 'PRO-ACTIVE' and attentive to the expectations of the customers, will be able to find an affordable solution that meets the expectations expressed here and elsewhere

 

[zeluxao]

Hi all

In fact you ask O-NOORUS with its D4 amplifier at 100 euros to perform the same functions as a SABAJ A30 pro at 600 euros ?

It's quite a 'challenge'

Did I say that? I'm just answering to several posts stating crossover implementation is only possible through an app. btw you have several cheap amps with hpf/ crossover implementation from the likes of rsl, dayton audio or smsl so it shouldn't be that hard/ expensive.