Does HT Bypass disable Sub-Out?

[Adeotec]

My Naim 152XS preamp has a unity gain HT bypass option. I’ve never used it before.

If you use the Naim HT bypass does it disable the sub-out signal on the preamp?

Thanks

[robert_h]

I would think there would be no preamp output; the sub out is driven by the preamp stage.

[Richard.Dane]

That would make sense. If you’re using the AV bypass then you’d most likely be using the LFE sub channel from the AV processor.

[Adeotec]

That’s too bad but I figured it might be the case.

I’m considering adding a HT element to my second system. Although I don’t own a sub(s) currently, I would have them integrated for music since music is the primary use of the system.

I was hoping to use the HT bypass and still keep the subs online. Anyone have any ideas about how to achieve this goal? I guess I could use a sub with HL signal like Rel?

[Richard.Dane]

If you’re running an AV processor and using the AV bypass then you’ll be using the LFE output on the processors and LFE input on your sub, so you won’t want the 2 channel sub output. You’ll have the LFE connected and enabled between AV processor and subwoofer. Most good subs should allow you to easily switch between 2 channel and LFE inputs, with their respective settings.

[Adeotec]

Thank you. Are you saying most quality subs can accept a connection from the AV and a separate connection from the pre-amp. I can then switch the sub input via remote or from the subs themselves? Similar to a preamp? That would solve my issue if I add subs in the future.

[Richard.Dane]

They should do. The Naim n-Sub could take 3 different inputs (2 channel high level, 2 channel pre level, AV .1 LFE) and could switch between them, by the front panel, remote, or RS232.

[Slug]

Here’s how I do it.
Whether its right or not, is another matter, but it works for me.

Everything is connected via low level.

My AV receiver/amplifier has two sub pre-outs and I have two subs. Each sub has one cable running from the Av receiver/amplifier to it.

The SN3 has two outputs for subs, labelled L and R. I run those cables to each sub also.

I fiddled with the phase, gain and frequency until they sounded right with 2 channel music listening, then adjusted the sub output level on the AV receiver to suit TV/Films.

Other than switching them on and off, I never have to touch them.