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Interconnects needed for 8240?

dumbo, modified 12 Years ago.

Interconnects needed for 8240?

Padawan Posts: 78 Join Date: 12/20/09 Recent Posts
I just purchased a pair of 8240s but havn't got them yet (nor have I seen a pair in person). I'm trying to figure out what cables I need to wire these to a digital source. I'm going to be using the GLM software in a stereo configuration and it looks like I need an digital AES/EBU cable runningfrom the source to one speaker and then another AES/EBU cable running from that speaker (outputting from the digital passthrough) into the other speaker.
Is that right?

Ps I believe Dynaudio Airs use a CAT5 cable to connect master and slave which would certainly be easier and cheaper form me.
christophe-anet, modified 12 Years ago.

Re: Interconnects needed for 8240?

Jedi Knight Posts: 188 Join Date: 3/23/09 Recent Posts
Hello,

Thanks again for your purchase. While waiting for your DSP loudspeakers you could consult our DSP System Manual which will provide a lot of useful information about the system functionality, connections, features, etc.

Our DSP systems feature separate network and audio signal wiring. This means that you will have to connect first the GLM network and network interface device to all loudspeaker of the system via CAT5 cables and then the audio between your source and the loudspeakers. Depending on your source, analog or digital, various connection configurations will have to be applied.

For digital source and stereo mode, you will need to connect one AES/EBU cable carrying the two audio channels to one DSP loudspeaker and then connect the second loudspeaker via the AES Thru connector. This is right (Stereo pair - Page 24).

More details about the system setup and connections can be found in page 15 of the manual under - Getting Started. http://www.genelec.com/documents/opmans ... Manual.pdf

Best regards,
dumbo, modified 12 Years ago.

Re: Interconnects needed for 8240?

Padawan Posts: 78 Join Date: 12/20/09 Recent Posts
I just realized that I have 2 stereo or L/R AES/EBU outputs on my Big Ben. I would assume that I could use that instead of daisy chaining. Is that correct and should I use L/R or duplicate stereo?
christophe-anet, modified 12 Years ago.

Re: Interconnects needed for 8240?

Jedi Knight Posts: 188 Join Date: 3/23/09 Recent Posts
Hello,

This is up to you to decide. If you use the GLM Rapid Cabling scheme, then the system expects to see both L and R channels in the same cable, meaning one AES/EBU cable. This implies using the Thru connector on the first speaker to send the second channel to the second speaker.

However, you can also build your own setup - we call it Manual Cabling - and assign the L channel to one AES/EBU cable and then the other channel to another AES/EBU cable. Most people do not do that as a single AES cable carries two channels.

Best regards,
dumbo, modified 12 Years ago.

Re: Interconnects needed for 8240?

Padawan Posts: 78 Join Date: 12/20/09 Recent Posts
It sounds like sending a stereo signal to each speaker from my big ben would be what the speakers expect to see in a standard configuration. The advantage is that I don't need a ridiculously long run of XLR/EBU between the speakers and the signal isn't being jittered in the pass through. Do I need to do anything unusual in the settings if I go this route (it doesn't look like it to me)?
christophe-anet, modified 12 Years ago.

Re: Interconnects needed for 8240?

Jedi Knight Posts: 188 Join Date: 3/23/09 Recent Posts
Hello,

Each speaker needs to receive one channel to reproduce it. As the AES/EBU cable carries conveniently 2 channels, it is standard to send one channel to the first speaker and the remaining channel to another speaker. Now, I am not sure I understand your thinking when you say you will have a long run between the speakers (?). If you connect an AES cable to, say, the Left speaker from your source and then another AES cable from the Left to the Right speaker, it seems you will have about the same total cable length as if you send one AES cable from your source to each speaker.

Now, note that our AES Thru connectors are free from jitter and signal degradation of any kind. This would be a serious compromise in the system design.

To connect your system with 2 separate AES cables going to each speaker, the Manual Cabling section of the GLM sotware will guide you very easily through that process. Nothing difficult at all.

Best regards,
dumbo, modified 12 Years ago.

Re: Interconnects needed for 8240?

Padawan Posts: 78 Join Date: 12/20/09 Recent Posts
I didn't really explain but to daisy chain requires a 3 meter run of AES/EBU between speakers. If I place my Big Ben between them I can use the pair of 2 meter Wyde Eye AES/EBU I have on hand. Also I thought you said the standard setup sends a stereo signal to one speaker which passed it through to the next (stereo right). The only reason I would send stereo to both would be to simplify the setup and keep it as close to the "standard" setup as possible. Of course a stereo signal to both is silly but isn't that what happens in the pass through?
christophe-anet, modified 12 Years ago.

Re: Interconnects needed for 8240?

Jedi Knight Posts: 188 Join Date: 3/23/09 Recent Posts
Hello,

Your setup with the existing pair of 2 m Wyde Eye AES/EBU cable is fine as well - it is really up to you to decide. It will work fine.

The connection scheme with AES/EBU cables is that 2 channels are carried by the cable. Each channel is labelled as A or B (subframe). When an AES/EBU cable is connect to a speaker, one needs to select (either on the speaker (via DIP switch) or via the GLM software) which subframe A or B the speaker should reproduce. Then, both channels are sent forward - via the Thru connection - to the next speaker and there the other subframe A or B has to be selected. So, you can have two speakers reproducing both the A (or B) channel, or you can have one speaker reproducing A and the other B ( L and R in stereo mode).

Best regards,