Negatron ii HT

[NBPK402]

My path is for my avp left and right channels go from the preout to the remote switcher (a balanced xlr switcher that has my Athena as the default for output going to my Xilica crossover and when I turn on my AVP it switches the input to the AVP. When the AVP is turned off it switches to my Athena for the output.

Now when I run REW, I have been using my windows 11 laptop and the audio and video is sent via the HDMI on the laptop to the AVP.
I just ordered a 1/8" male to dual male rca cable so I can plug into the laptop headphone jack and plug the RCA splitter cable into the Denafrips Athena. We will see if I get different/better results.

 

[ddude003]

Another option is to use the Generator function to save a sweep tone with start refs as a .wav file and play it through your entire signal chain, Roon or put on a jump drive, connect to your Lumin and play thru the Lumin player... Then just use the lappy usb with the mic to acquire the sample sweep tone...

As for your previous comment about the Xillica FIR filters... How are you creating the FIR filters? And doesn't theose FIR filters deal with magnitude and phase?

 

[NBPK402]

Thank you for the suggestions... I should have a HDMI breakout box in the next 2 weeks and also a 1/8" splitter to dual RCAs next week. I have decided to sell the Lumin U1 mini as I think the Nucleus 1 is all I need.. Selling the Lumin will get me some cash to pay off all these mods and be one less item in the rack and 1 less item to ship when we move to Europe....sometime in the next 2 years.

It looks like I was mistaken on the Fir filters.... I have 31 GEQ filters per input and 8 PEQ filters per output.

I found this about the filters "
FIR filters and GEQ filters are different types of filters used in signal processing and audio mixing:

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• FIR filters
  Finite impulse response (FIR) filters produce an output that's limited to a finite amount of time, while GEQ filters are used for broad tonal shaping and quick adjustments to fixed frequency bands.
  
  
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• Features
  FIR filters are also known as non-recursive filters, convolution filters, or moving-average filters. They're inherently stable because they have no feedback in their equation. FIR filters can be easier to design than other types of filters, and they can produce linear phases. However, they often require a higher filter order than IIR filters to achieve the same level of performance.
  
  
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• Applications
  GEQ filters are commonly used for feedback control in live sound situations. They can be easier to use for broad tonal shaping or when you want to make quick adjustments to fixed frequency bands.

 

[ddude003]

No worries @NBPK402... I use FIR filters in a convolution engine (HangLoose Convolver) for DSP Room Correction... It is like having 32768 eq sliders embedded in the FIR filter... It is all done in software via a VST plugin hosted in the Audirvana player...

I am pretty sure you can upload FIR filters to the Roon player as well as managing additional EQ and speaker distances...

As far as your above graphics goes I would probably flatten your lows to match the rest of the frequency range and then add a -6db tilt... Easier said than done in hardware... Notice that many newer EQ emulations (plugins) actually have a tilt knob... Lol...

 

[NBPK402]

No worries @NBPK402... I use FIR filters in a convolution engine (HangLoose Convolver) for DSP Room Correction... It is like having 32768 eq sliders embedded in the FIR filter... It is all done in software via a VST plugin hosted in the Audirvana player...

I am pretty sure you can upload FIR filters to the Roon player as well as managing additional EQ and speaker distances...

As far as your above graphics goes I would probably flatten your lows to match the rest of the frequency range and then add a -6db tilt... Easier said than done in hardware... Notice that many newer EQ emulations (plugins) actually have a tilt knob... Lol...

I am going to retune because...even though it sounds great, I am hitting 90 db on peaks at 10 on the volume control (60 is max), and I am maxed at about 35 on the volume. It sounds very loud even though it is just over 100db @14'.... I have had problems with getting REW setup since we moved to Mexico. I can set it up and it is fine then later in the day it says signal to noise is to low or distortion is to high. I change the levels and it gives another error that something in the chain is to high. I am hoping that if I use either a hdmi breakout box or a 1/8" RCA splitter that I can get the levels right.

I am also curious as to what it will sound like going through the Pontus 2 via optical...so I am going to try a little experiment.

 

[NBPK402]

Coming Friday...my new horn setup. I chose this new setup because I have always like the look of the Onkyo, but my version will be a teenie bit larger and be possibly completely OB, or half OB and half with a cabinet. Size is about the size of a Jubilee with similarities to the Onkyo.

 

[Sonnie Parker]

Wow... those look awesome.

 

[Todd Anderson]

I agree… those look amazing!!

 

[NBPK402]

Both horns are assembled to the frame and have the bottom woofers installed. Tomorrow I will get the top compression driver and woofers Installed. I hope I have enough wire for the bottom woofers. I know I have another XLR cable.

 

[Sonnie Parker]

Beautimous!

 

[NBPK402]

Front channels in place for wiring, and finish attaching the top woofers.

 

[ddude003]

Front channels in place for wiring, and finish attaching the top woofers.


View attachment 77206

Beautiful!!!

 

[Sonnie Parker]

You've been busy... and you got it looking really nice... beautiful work indeed.

 

[NBPK402]

I am trying my best.

 

[NBPK402]

My wife came home today and I asked her what she thought and she was not really pleased due to the size. I told her the footprint is exactly the same as when the f20 horn was laying down and the same height as when the f20 is standing up. Then she took a closer look and really likes the way the horns look now vs the ratty old black horns.

When I set up everything with the minidsp ddrc88a, I discovered a buzz from both compression drivers (cables and amps are the exact same ones I used prior to swapping in the minidsp. I tried inverting the wall wart power supply connector since it is the "0 0" connector and can be inverted...no difference. I then swapped out the power cable...no difference. Then I removed the xlr input to the power amp and it went away. So now I am down to swapping the xlr cable from the minidsp to the amp. If that does not solve it...next is to check the green wiring block to XLR connector adapters (from minidsp). Last possibility is that the wall brick is bad (I already tried swapping the power cable for the brick).

Now each channel is plugged into its own wall socket on the same wall and never induced a buzz, so I am assuming that is not the problem...plus the buzz is on both compression drivers too.

 

[NBPK402]

TRoubleshooted by removing and swapping cables and have come to the conclusion that either it is a problem with the Minidsp itself or the power brick. I ordered a new power brick today...we will find out in a week.. If it is internal... I will see if minidsp can sell me a replacement board.