Hello, I am new to Naim and the forum. I just purchased a nas 152xs, Flatcap xs and the Nap 155 xs. I have a few questions. Do I need to connect both the upgrade 1 and upgrade 2 to the Flatcap? Also the sub out rca’s are not working and the remote I have Naim Remote Control Uniti & Streamer IR only controls the volume, is that correct?
Thanks
Stephen
Yes you definitely want to connect both, upgrade 1 is for digital controls and lights and upgrade 2 is for the analog signal and filters.
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Thank you
Will it change the sound?
Thanks
It will sound better, yes. I’m not sure which remote you have, but if it has a pre button, press that and you’ll get full control of the preamp. It’s all in the manual.
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To give you an idea when I ran a 152XS with a 200DR it was clearly superior with the FlatCap XS in Upgrade 2.
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Yes, Stephen. You will need a second Snaic5.
A warm welcome to possibly Naim’s most recherché amplifier club 
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