RoomFit and external Subwoofer

[NickC9]

Hi,
I am using a Wiim Ultra with external DAC (Chord Qutest) and external AV Receiver (HK AVR230). I can switch between stereo audio and surround sound quite easily, except currently have the sub attached to the Wiim and have to plug it in to the receiver. If I connect the subwoofer direct to the external receiver can I still use Roomfit to correct lower frequencies?

Googling seems to suggest "low-frequency correction is effective only if the Ultra output drives the sub directly", but the front speakers are not connected to the Wiim either but these can be calibrated ok.

I realize I may have to have different sub settings for either hifi or cinema mode and I can adjust the sub using its own controls - but what would be best to allow Roomfit to correct below the Schroeder frequency marker. Thanks in advance

 

[dominikz]

If I connect the subwoofer direct to the external receiver can I still use Roomfit to correct lower frequencies?

Yes - assuming you connect one of the Ultra outputs to one of the inputs of your receiver, and you disable the Ultra subwoofer output in the WiiM Home app.
In that case RoomFit will work as if full-range speakers were connected to its output.

 

[NickC9]

@dominikz Thank you, so as my Wiim is connected via usb to the DAC and then DAC via rca to the receiver it should calibrate the full frequency range. I will give this ago, realising I may have to change settings for cinema then back for hifi - perhaps.

Thank you for your reply and information

 

[dominikz]

it should calibrate the full frequency range

Of course you can still select the frequency range where RoomFit will actually perform correction, e.g. 20Hz to 300Hz.
Note that I've personally never tested USB output on my WiiM devices, but I suspect it works like any other output.

 

[NickC9]

@dominikz thanks again, I will do this

 

[m_sherzod]

Hi guys! I am planning to introduce a second sub into my system and integrate it with a mini DSP device. The chain I guess should be as follows:

For the mains: Ultra->External DAC->Preamp->Power Amp->Speakers

For the subs: Ultra->External DAC->Preamp->Mini DSP->Subs

This allows for the main speakers to receive a quality signal from the external DAC and also will allow to control the volume from one place.

I want an even and quality bass, because I mainly listen to tech house style music where bass is really important.

Based on the YouTube videos I am very impressed about what mini DSP can do, but I have a question that I am struggling to get an answer to - as I understand, the mini DSP makes analog to digital and digital to analog conversion and in between digital processing is involved as well, so that should introduce a delay compared to the mains, so how does one realign the mains with the subs? The mains can’t be delayed, whereas the subs can’t make up the delay since mini DSP is itself is the reason for a delay…

Am I missing something? Is mini DSP an audiophile grade solution or is just good enough for home theater enthusiasts and no more?

 

[Goodnews]

I have a similar problem.


The woofers (2x18") are positioned so that they do not need any delay to the main speakers.

However, this is of little use to me, as the gain of the Wiim Pre is set to +10 dB and that of the sub output to +15 dB.
My main speakers have 98 dB.

When the Wiim volume level is set to 13, I have 80 dB at the listening position, but I actually wanted 65 dB.

What about exact channel equality of the pre-output when volume 13 is already almost at the maximum acoustically?

Now to the woofer cabinet.

I'm not entirely sure how deep the recordings <60 Hz still are in stereo.

Basically, I believe that without an HPF for the main speakers, integrating the woofers doesn't really work. My woofers go up to 64 Hz and the main speakers down to 69 Hz.

There is a constant volume fluctuation; depending on the album, the bass performance varies, and the sub output is often too quiet, causing the mono amp to switch off.


I use a DSP up to a maximum of 100-150 Hz.

I also listen to dance/techno/hip hop/dub music, and I still believe that clean 40 Hz in normal listening rooms is quite a statement, so the necessary headroom of the bass cabinet must be larger and good at the lower end.

P.S.
I'm still patient, but I'm starting to doubt whether the Wiim device can do the job. I have the Wiim Amp Ultra and so far I haven't enjoyed using it and have no idea whether the USB output can be used in such a way that the Wiim Amp Ultra only functions as a streamer, which has also caused problems so far.
Compared to

Mac Mini / Audirvana Studio/ external DAC / external bass DSP.