怎么了........?我无语.......
The foam for subwoofer is to do what ah? Must cover the area of the subwoofer? Or just the "legs"?
Currently I'm only using the default 4 rubber legs thingy that comes w my sub.
Any foam can right? Recently got some feedback from downstairs neighboUr say vibration or some noise.
legs is key area
foam is normally used to absorb sound.
behind the speaker like where the bass port is put foam on the wall is also good.
you're pretty much settled. otherwise swans m200mkiii+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.
Can try getting those multi opt in-1 opt out adaptors. But not sure if sound quality will be affected or not..
Did Z Reviews review the two? I do remember M200MkIII vs S2000 Pro
Not sure if it is appropriate for me to respond, since I am reviewing R2000DB. But for $250-300 range, if you need the inputs, then you don't have much choice apart from that.
Problem with R2000DB is that the digital input is much better than the analog inputs, because internally the amplifier chip is a digital-input chip so by going digital you skip the entire DAC portion of the audio chain, while any analog-in is converted into digital first. And R2000DB has only 1 digital input. So unless you're the type that doesn't care about DACs and sound cards, you would be wanting your main audio source to be connected via optical in. But then your PS4 has only optical out...
I suggest getting optical-out from your computer (via motherboard or USB-SPDIF converter), while finding some way to get audio out from your PS4. Can be HDMI audio extractor, can be monitor/TV, can be HDMI capture card...
Or of course you can just turn a blind eye and just connect it however way you like... LSR305 is also having only analog-only inputs feeding an ADC... and so far I haven't seen anybody complaining about it sounding bad.
But enough about R2000DB... if you need more digital inputs, there is M200MKIII+, S2000 Pro, perhaps even M200MKII (WiFi) but I'm not going to recommend the last one out of spite because their choice of tweeter makes the product naming borderlining on bait-and-switch.
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.
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.
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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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.
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.