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8330 digital setup and benefits

jaripa, modified 6 Years ago.

8330 digital setup and benefits

Youngling Posts: 4 Join Date: 9/19/15 Recent Posts
I have a pair of 8330 monitors and GLM 2.0. In my current setup, I have a Sonos Connect connected to the 8330 monitors using an RCA - XLR cable and I'm using the Sonos app / Logitech Harmony universal remote for volume control. However, Sonos Connect also has a Coaxial S/PDIF output and recently I've been thinking of connecting Sonos Connect to the 8330 monitors digitally. Is there any noticeable difference in sound quality when using digital vs analog connections with the 8330s? If not, are there any other benefits from using digital connections with the 8330s?

I've been researching the Genelec and other forums for the best setup for Sonos Connect and 8330s in case I'd switch from analog to digital. I've read that the S/PDIF cable should preferably be less than 2 meters and that an impedance transformer is recommended. Does the below setup look correct?

Sonos Connect -> S/PDIF cable (1m) -> Neutrik NADITBNC-MX -> AES/EBU cable (3m) -> Monitor 1 -> AES/EBU cable (3m) -> Monitor 2

S/PDIF cable - http://www.thomann.de/fi/cordial_cpds1_cc_digitalkabel.htm
Impedance transformer - http://www.thomann.de/fi/neutrik_naditbncmx.htm
AES/EBU cables - http://www.thomann.de/fi/cordial_cpd_3_fm.htm

I've also been pondering about what's the best way to control the volume in a digital setup. On the Genelec forums, it's been recommended to use GLM to control the volume. Apparently it's possible to use GLM without a computer when powering GLM with a USB power supply and there's also the 9101A wireless volume controller. However, I wouldn't want to buy an extra volume controller since I already have a Logitech Harmony universal remote. But unfortunately, GLM and 9101A use radio frequency communication which is not supported by Logitech Harmony remotes so I can't use my Harmony remote for controlling the volume through GLM.

I read that Sonos Connect also allows to control the volume of it's digital outputs (https://en.community.sonos.com/components-228996/volume-control-through-coax-spdif-output-6330316) without any increase in distortion to -48dB (https://en.community.sonos.com/troubleshooting-228999/zp80-output-specifications-4362). Using Sonos to control the volume would then be my preferred option since I can use my Harmony remote with Sonos. From the 8330 monitor point of view, is there any difference in controlling the volume through Sonos Connect rather than GLM in a digital setup?

Thanks!
ilkka-rissanen, modified 6 Years ago.

Re: 8330 digital setup and benefits

Yoda Posts: 2564 Join Date: 3/23/09 Recent Posts
Hi there,

For sure it won't be a night and day difference but some people claim they can hear the lack (in positive meaning) of extra DA/AD conversions. But it's always best test with your own ears to be sure.

Cabling looks correct but you need impedance transformer with female connector: http://www.thomann.de/fi/neutrik_naditbncm.htm

Also I would recommend using this kind of cable between the Sonos and the Neutrik (it has BNC input connector): http://www.thomann.de/fi/the_sssnake_1855_bncchinch.htm

Volume can be adjusted from the Sonos without any problems.
jaripa, modified 6 Years ago.

Re: 8330 digital setup and benefits

Youngling Posts: 4 Join Date: 9/19/15 Recent Posts
Thanks for the quick reply!

It's such a small upgrade that I'll test it out and see if I can notice any difference although I doubt it.

Also, thanks for pointing out the wrong impedance transformer and cable. I didn't check the input connector carefully enough and the 1 meter long cable would have been unnecessarily long anyway.

I have to say that I'm very pleased with Genelec's products and service. Keep up the good work!
simo-l, modified 6 Years ago.

Re: 8330 digital setup and benefits

Youngling Posts: 2 Join Date: 11/27/15 Recent Posts
I'm using Sonos Connect as digital audio source with the parts Ilkka Rissanen recommended in his reply. AES/Ebu signal is connected to 7350A subwoofer with a 3 m long cable. Digital audio signal is working with no issues.

Parts used in my setup:
Cordial CFDM 3 FM - professional AES/EBU digital cable
(110 Ohms) with male XLR to female XLR connectors.
-----------------------------------------------------------------------
the sssnake 1854 BNC-Cinch, cable, BNC-male to RCA male,
26 cm, length of cable 17 cm, 75 Ohm, RG-59
-----------------------------------------------------------------------
Neutrík NADITBNC-M - AES/EBU BNC adapter, Female BNC 75
Ohms input - male chassis XLR 110 Ohms output.