Hi
I recently bought a XS and I want to hook up my minidsp to so I can use it as crossover/subEQ between my satellites and subwoofer. But when I tried to connect it between the pre amp in and power amp in, it died and doesent wake up. Only when i refit the link it works again.
I understand that the pre amp loses its power when the link is removed, but cannot I solder something together so it keeps its power and the signal is being filtered in the Minidsp?
So now I´ve bought a DIN to 4 RCA in the thought of solve this problem with a tape loop connection but the volume on the sub is constant and doesent follow the Nait volume?
When i connect the sub to the sub out, the volume follows on the sub, but then my satellites plays bass, which I dont want them to...
I´ve pushed the mute button till it starts flashing and I can select different input lights but it doesnt seem to make any difference.
Does anyone know if this is even possible with this amp?
I love the sound so I dont want to sell it. Got it tfor 600£!
Posted on: 02 November 2015 by Richard Dane
The NAIT xs pre-amp section is powered from the power amp section. When you remove the link, you remove not just signal connection but also power connection. To get around this you should use a dedicated PSU on the pre-amp - the Flatcap 2/x/xs. Do not even think about trying to "hotwire" the pre-amp - very unwise and anyway, such discussion is way outside forum AUP.
However, ideally you would use an integrated amp with an off-tape monitor loop, so you could switch the DSP in and out of circuit just through switching in the tape monitor. I have a pair of KEF R102s that need an offboard "KUBE" equaliser box and this is how the KUBE is integrated into the system, so I imagine your miniDSP is similar. Supernait...?
Posted on: 02 November 2015 by ChrisSU
Alternatively, maybe change your miniDSP for the digital or DAC version so that it's connected elsewhere in the system. (Although this is obviously no use if you have an analogue source.)
Posted on: 02 November 2015 by Bergggren
Alright, thanks for the answer!
A SN is not really a alternative for me right now.
Does the XS have a tape monitor?
When I press the mute button a while, the volyme wheel starts to flash and if I push mute I can toggle different input. What does is the function of that?
Moderated Post: Please note forum rules - no discussion of unauthorised modifications, including 3rd party power supplies on Naim kit.
Posted on: 02 November 2015 by Bergggren
If I could get a dedicated PSU, would I be able to connect the dsp on the way back to power amp in? (4 pin only includes signal, no power)
Posted on: 02 November 2015 by Richard Dane
In theory yes; Pre-amp to Flatcap via SNAIC5, signal out from the flatcap (4pin DIN) to the DSP via DIN4-RCA i/c, and from there via RCA-DIN4 i/c to the Power amp in (4 pin DIN).
Whether it'll sound any good, I have no idea. Question is, are the miniDSP, sub and satellites worth the trouble and expense here?
Posted on: 02 November 2015 by Bergggren
It sure is! I have the Guru Audio Junior, and they have good bass extension.
But not enough for movies in my opinion, and I don´t want a HT just yet. Maybe in the future when the space is not a shortage. Plus, I get to try a PSU with the XS and see what the fuzz is about 
I will try to get a hold on that PSU and i´ll come back with the results for future wonderers.
Thanks for your help!
Posted on: 02 November 2015 by Huge
Why do you need the miniDSP to do the crossover? Most subs have a low pass filter that's adjustable from above 100Hz to below 40Hz and that more than covers the true bass extension of the Gurus. If you want to reduce the bass extension from the Gurus just block the reflex ports.
With the ports blocked the Gurus will then have second order bass alignment (rather than the fourth order bass alignment from a reflex enclosure). This will ease the timing issue; the only remaining problem integrating a sub will be the bass resonance modes of your room (assuming you use a microphone to set it up).
Posted on: 02 November 2015 by Bergggren
Good suggestion.
But I have built my own sub and im using a t.amp ta2400 which doesnt have any crossover whatsoever, so a minidsp is crucial in my case. And to defeat the biggest modes. And to do a Linkwitz. Its amazing!
Posted on: 02 November 2015 by Huge
Originally Posted by Bergggren:
Good suggestion.
But I have built my own sub and im using a t.amp ta2400 which doesnt have any crossover whatsoever, so a minidsp is crucial in my case. And to defeat the biggest modes. And to do a Linkwitz. Its amazing!
Hmm, yes, using a general purpose power amp to drive the sub does present problems unless you build your own low pass filter.
Please note however, that as the sub is going to be operating clearly below the Schroeder frequency band of the room and not location coincident with the main speakers, then a Linkwitz aligned crossover may not be ideal, particularly immediately above or below the sub's crossover point.
There are also distinct limitations to use of DSP to correct room effects - better to use acoustic treatment to fix the worst problems first, then use the DSP to sort the remaining bits that acoustic treatment won't fix.
Posted on: 02 November 2015 by Huge
Suggestion...
Block the ports on the Gurus to limit the extension (and tighten the mid bass).
Connect the DSP input to the sub out of the XS, connect it's output to the ta2400.
Programme the DSP to do the crossover and reduce the sub output at the main room modes. The only thing missing will be using the DSP to correct the higher room modes and early reflections, but these are better fixed using acoustic treatments anyway.
Posted on: 03 November 2015 by Bergggren
I will only EQ 10-80hz with the DSP. I also lack the knowledge and the space for fixing the acoustics with big bass traps and etc. The DSP i great when using a subwoofer, in any other case it´s better without.
The LT begins at 35hz were my sealed subwoofer starts to roll off.
I am going to hunt down a PSU 
Otherwise, great suggestion!
