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2.0 & 2.1 speaker discussion thread IV [consolidated]

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Old 30-03-2018, 11:32 PM   #211
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Hi bros can intro me some powered speakers for my desktop, only requirement is that it need to connect to my turntable (RCA), PS4(optical), and PC (3.5 or RCA via converter).

Budget is $500, looking at it Edifier R2000DB could be a good choice? looking for alternative suggestion as well.
Aego 3 soundbar/speaker, comes with optical, 1 3.5mm input.
If not Logitech Z625 which have all the connection you need.
However most here do not recommend Logitech, sub par
quality.
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Old 31-03-2018, 02:14 AM   #212
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R2000DB uses TAS5508(102db snr output to digital amp) digital processor, PCM9211(101db snr) ADC.

The analog and digital input appeared to be of negligible difference.
TAS5508 is already part of the amp (serial audio input, PWM output). PM9211 is both the ADC and the SPDIF receiver.
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Old 31-03-2018, 04:03 AM   #213
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TAS5508 is already part of the amp (serial audio input, PWM output). PM9211 is both the ADC and the SPDIF receiver.
TAS5508 is a PWM processor, it outputs PWM to H bridge/differential output power stage.
The PWM output is limited to 102dB SNR which is slightly higher than the ADC output to TAS5508.
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Old 31-03-2018, 04:17 AM   #214
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Hi I have a m200mkiii + for sale. Brand new, unopened and in box. Selling for $450.
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Old 31-03-2018, 09:33 AM   #215
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TAS5508 is a PWM processor, it outputs PWM to H bridge/differential output power stage.
The PWM output is limited to 102dB SNR which is slightly higher than the ADC output to TAS5508.
....................................................................



The typical class-D amplifier includes the PWM modulator as part of the amplifier. Because the typical amplifier needs to accept typical audio formats. It just happens that in this particular system the two chips are separated. Another example is Tripath's TK2050 which is TC2000 + TP2050. A functional amp needs to include both chips.

I mean, if you look at the schematic of a class-AB transistor amp, you don't say that only the 4 final push-pull output transistors are the power amp, while calling the entire front section in front of it a pre-processor. How to connect the feedback for example?

Similar things exist for linear amps too: for example LME49810 which is more precisely an Audio Power Amplifier Driver but for the most part is just an amp chip with the last output transistor(s) outside the chip.

Or how about IRS2092 for another well-known class-D amp? That thing is also just the driver, and the MOSFETs are whatever people want to use with it.

If you're saying that the quality of the input doesn't matter because the bottleneck is somewhere else in the chain, usually the amplifier or the speaker, then yes that school of thought exists.

However that school of thought also invalidates spending $2,000 on the DAC and amplifier and says onboard sound is good enough, and I'm not going to bring any discussion in that direction in an audio forum.
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Old 31-03-2018, 05:40 PM   #216
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....................................................................



The typical class-D amplifier includes the PWM modulator as part of the amplifier. Because the typical amplifier needs to accept typical audio formats. It just happens that in this particular system the two chips are separated. Another example is Tripath's TK2050 which is TC2000 + TP2050. A functional amp needs to include both chips.

I mean, if you look at the schematic of a class-AB transistor amp, you don't say that only the 4 final push-pull output transistors are the power amp, while calling the entire front section in front of it a pre-processor. How to connect the feedback for example?

Similar things exist for linear amps too: for example LME49810 which is more precisely an Audio Power Amplifier Driver but for the most part is just an amp chip with the last output transistor(s) outside the chip.

Or how about IRS2092 for another well-known class-D amp? That thing is also just the driver, and the MOSFETs are whatever people want to use with it.

If you're saying that the quality of the input doesn't matter because the bottleneck is somewhere else in the chain, usually the amplifier or the speaker, then yes that school of thought exists.

However that school of thought also invalidates spending $2,000 on the DAC and amplifier and says onboard sound is good enough, and I'm not going to bring any discussion in that direction in an audio forum.
http://www.ti.com/lit/ds/symlink/tas5508c.pdf
https://www.ti.com/lit/ds/symlink/tas5121i.pdf

I am using the term TI used themselves, PWM processor and power stage.
You could lodge a complain to TI about their documentation if you insist otherwise.

The audio chain is as good as the weakest link. For the most parts, the weakest link is the room itself. What I said was that when you insist that the digital input is much better than the analog input which is not true because specs wise they are rather similar. Digital is better in that implementation but not by much.

As for spending tons on DAC and amps, while, like I said earlier, weakest link dominates. The only good thing about using higher end components along the chain is to prevent gradual accumulation of errors, which for the most cases, mostly dependent on the weakest part of the system.

There is nothing wrong about discussing anything here since this is not Headfi forum where audio science is not allowed to be discussed except in a specific sub forum due the massive presence of vendor sponsorships.
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Old 31-03-2018, 07:39 PM   #217
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What I said was that when you insist that the digital input is much better than the analog input which is not true because specs wise they are rather similar.
End result is similar you mean.

Doesn't change the fact that it avoids a digital -> analog -> digital conversion which is better than having the best DAC available on the planet, and that it only has to eat one 102dB from the PCM -> PWM conversion instead of eating one 101dB + a 102dB from the analog -> PCM -> PWM conversion.

P.S. Common mode noise.

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Old 02-04-2018, 10:23 PM   #218
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End result is similar you mean.

Doesn't change the fact that it avoids a digital -> analog -> digital conversion which is better than having the best DAC available on the planet, and that it only has to eat one 102dB from the PCM -> PWM conversion instead of eating one 101dB + a 102dB from the analog -> PCM -> PWM conversion.

P.S. Common mode noise.
Do you use sound card or onboard realtek sound.
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Old 08-04-2018, 09:48 PM   #219
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currently using t40 II speakers as well(2 oclock), has anyone use xm7? wondering if i should change from t40 to xm7..
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Old 08-04-2018, 10:05 PM   #220
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XM7 now forever @ $149 is not too bad a deal...

https://sg.creative.com/sale/#

But what are you going to use to drive it?

Before you think China TPA3116 amps, note that XM7 is designed for use with X7 - In fact in X7 control panel, XM7 is a selectable option under speaker model. Which makes me wonder - how actually is XM7 supposed to sound like, and how much different would it be with a standard amp?



Hence this sums up what I feel about XM7's situation


https://www.youtube.com/watch?gl=SG&...kLCUtU&t=9m55s
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Old 08-04-2018, 10:26 PM   #221
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im not using any amps. same goes for my t40 II. just direct from mobo to speaker. (did tot about getting a internal sound card)
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Old 08-04-2018, 10:49 PM   #222
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XM7 now forever @ $149 is not too bad a deal...

https://sg.creative.com/sale/#

But what are you going to use to drive it?

Before you think China TPA3116 amps, note that XM7 is designed for use with X7 - In fact in X7 control panel, XM7 is a selectable option under speaker model. Which makes me wonder - how actually is XM7 supposed to sound like, and how much different would it be with a standard amp?



Hence this sums up what I feel about XM7's situation


https://www.youtube.com/watch?gl=SG&...kLCUtU&t=9m55s
https://www.head-fi.org/threads/crea...ssions.756102/

Review from Headfi about X7 and XM7.

Don't think there is any issue with any special settings built into X7 for the XM7, they were sold as companion products anyway. Even in GFX cards drivers, you would often see game specific optimisations and profiles, nobody seemed to complain about that.

I don't use those modes though, I EQ it to my own liking.
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Old 09-04-2018, 10:20 AM   #223
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any recommendation for sound cards for t40?

also considering to upg to either audioengine 2+/5+

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Old 09-04-2018, 06:34 PM   #224
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Anybody has the Yamaha NX-N500?

How is it for you guys? I'm intending to use it with my desktop and ps4 connection.

I personally have tried at the yamaha showroom, i really love the treble highs, the mids, vocals just not so on the lows.

Couldnt find an excuse to pull the trigger on it yet. Hope anyone would have any other recommendations that has something like the Yamaha NX N500 has to offer?

Tia.
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Old 10-04-2018, 06:46 AM   #225
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Anybody has the Yamaha NX-N500?

How is it for you guys? I'm intending to use it with my desktop and ps4 connection.

I personally have tried at the yamaha showroom, i really love the treble highs, the mids, vocals just not so on the lows.

Couldnt find an excuse to pull the trigger on it yet. Hope anyone would have any other recommendations that has something like the Yamaha NX N500 has to offer?

Tia.
It's designed more for music than gaming.
For gaming get either 2.1 speaker or soundbar like Aego 3 soundbar.
The sub will help to produce those low frequency like rumble
and etc. in games/movies.
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