May 14, 2022 at 7:53 pm #5027jamesjBRONZE Member
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I’m sure this has been answered (at least in part), so sorry for any potential repetition, but the site is a bit difficult to navigate at the moment.
I have recently bought a pair of Beolab 18’s and a beosound core. I’m using the core, as I also have a Stage and A9 and I prefer the B&O app to Chromecast or Airplay for multiroom.
While I was waiting for the core to be delivered, I tested the speakers by connecting my laptop via headphone to RCA. Sounded great, Though cracked a little on connection.
Source: Apple Music; 24-bit, 48Hz output selected via my MacBook’s ‘Audio Midi setup’.
I now have the core connected via Powerlink (daisy chained); 2.5mm B&O Powerlink cable.
Listening now with Deezer HiFi doesn’t sound quite as good. I know Deezer Hifi is lower quality than Apple Music (16-bit, 1.411 Kbps), though they claim on their site this is CD Quality. Would I be hearing the difference, or is it more likely the cables?
According to the Tech Specs the core supports:
“Standard sample rates up to 192 kHz, stereo and up to 24 bit”
It is not at all clear to me how you would get this to the core, or from the core to the speakers.
So my questions are as follows, for the best quality source at the speakers:
- Should I upgrade the Powerlink to some expensive Audioquest ethernet cables (a recommendation from the HiFi shop)?
- Should I use optical? Will the core control the volume if I do?
- Should I use a Transmitter 1?
- Is this more likely a Deezer/source issue? If so, any advice on how to get a better quality source to the core, can I keep multiroom if I combine something with the optical in?
Any advice, answers to the questions above, or more logical setup welcome!
Sorry if these are dumb questions, I did quite a bit of googling, but couldn’t find a definitive answer to what happens to the sample rates via the different cable options (except with transmitter 1, though that seems to come with its own problems).
I’m also not 100% on what the DAC in the 18’s is doing.
Under ‘Inputs and outputs’ on the B&O site tech specs it states:
In: Sample rate 32k, 44.1k, 48k, 96k/PCM16-24 bit
Out: Sample rate 48k/PCM 24 bit
Though it looks like that could just be for Toslink/Optical. Does this mean that anything above 24/48 will be downsampled anyway, or have I misunderstood this completely?May 15, 2022 at 8:53 am #5035Steve at Sounds HeavenlyModerator
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Please don’t worry, these are very sensible questions!
- Never use “audiophile” Ethernet cables for Beolab speakers, as this is not an Ethernet connection (even though the plugs are the same). Beolab speakers require fully shielded cable, which rules out Ethernet (even high-end cables). I can help with shielded RJ45 Powerlink cables if required, but there is no audible improvement to be made here if everything is working well at the moment.
- Yes, the Core gives out a volume controlled optical signal, so this can be used to connect directly to the Beolab 18 speakers. Some users do report improvements from using the optical connection, but opinions vary. Well worth a try…
- Yes, Transmitter 1 is a good option if you need a wireless link to the speakers, whilst the sound quality won’t suffer, it won’t improve the sound. If cables are OK for your room, then leave the cables in place.
- There are various digital sources that can be linked to the optical input of the Core for Deezer, without losing multi-room capabilities. One cheap and simple option is Bluesound Node 2i, but there are plenty of other products that can be used instead.
I can help with cables for any of these options via my sponsor link below!
Kind regards, Steve.May 15, 2022 at 9:19 am #5038MillemissenBRONZE Member
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To your numbered questions…….
Definitely not the 1.
I’d – in that case – probably go for 2………although I am not so sure that it always will be significantly better.
As for controlling the volume via the Core – yes, you can do that – there is a setting just for that.
3. would be an extra not necessary step…..unless you’d like to run the BL18 wireless.
When you used your Mac/Music, your source material probably was regular 44.1/16, that then was upsampled to 48/24 in the settings there, right?
When you compare stuff from two different music services, you can not be sure that the mastering is identical (Apple has their own rules there).
This means that – if you want to do a comparison between an analog connection and a digital – there are many variables. First of all the source material has to be exact the same and also the SPL (the volume you listen at) must be identical. In real life this can be very complicated and can easily lead to ‘quick conclusions’.
The ‘DAC’ in the BL18 is not just a regular DAC like you often see as a device in setups with a digital source and an analog input. It is much more an integrated part of the sound processing in the speaker….I am sure ‘someone else’ can explain this better.
All processing there is based on a conversion to 24/48 in order to keep the sound consistent with all inputs.
IMHO you should not worry that much about sample rates and bitdepth. Even source material in 44.1/16 can sound excellent depending on the actual recording, the mixing and the mastering – a higher bitrate/bitdepth is by no means a guaranty for ‘better sound’.
I recomment that you try listening to what you normally listen to with an analog connection (PL/good shielded PL cables) and with an optical connection from the BS Core for a while……in order to see what suits you best.
Remember that…..when it comes to audio gear, cables, sample/bit rates etc – it is not about ‘good or bad’, it is much more about ‘different’……..unless you – of course – have really bad stuff.
After all it is about you liking what you hear and not about which sample rates/bitdepths and cables you use.
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