Wiim Amp Ultra - Polk Audio XT20 & SVS SB 1000 Pro - Configuration

[Andrew78]

Hi everyone, I'm new to the Wiim world!
I recently purchased a Wiim Amp Ultra in combination with Polk XT20 speakers and I have to say I'm very happy!
To complete my system yesterday I purchased a SVS SB 1000 Pro Subwoofer. The Sub will be connected via the Sub Out output and LFE input.
Can you please give me some advice on how to best configure it? (Be patient i'm a beginner )
Does it make sense to use the SVS app to control the subwoofer or do you recommend I do everything from the Wiim Home app?
Thanks in advance everyone

 

[harkpabst]

Hi everyone, I'm new to the Wiim world!
I recently purchased a Wiim Amp Ultra in combination with Polk XT20 speakers and I have to say I'm very happy!
To complete my system yesterday I purchased a SVS SB 1000 Pro Subwoofer. The Sub will be connected via the Sub Out output and LFE input.
Can you please give me some advice on how to best configure it? (Be patient i'm a beginner )
Does it make sense to use the SVS app to control the subwoofer or do you recommend I do everything from the Wiim Home app?
Thanks in advance everyone

Such an easy question to ask ... and so may ways to answer it.

You will probably get differing advice from different people, so I'll try to be the first of them. My basic recommendation is to see the subwoofer setup as an iterative process. Don't expect a single magical "this is the right way" button anywhere. Start with what is good common practice and try out variations if you feel like it.

Obviously, I already posted about this topic too often, so, here is the very short version:

Post in thread 'Sub settings?'

Oct 23, 2024

Always a good idea to just start with the default settings. They are the default for a reason.

So, leave the crossover frequency at 80 Hz. Use the LFE input on the Gravis I (the crossover know has no effect on the LFE input). Set LFE level to roughly 50%. From this point there is now way around trying it out for yourself.

• If the sub is too loud, decrease the level within the WiiM Home App (much better and more convenient than changing it on the sub).
• Try the phase switch in both settings, 0° and 180°. Whatever results in louder bass is right. Re-adjust level if...

• harkpabst

• 

A bit more in detail:

Post in thread 'Help with subwoofer settings please'

Aug 6, 2024

Don't worry about whatever specs the speaker manufacturer may publish. It's (almost) irrelevant for subwoofer integration, as long as you don't try to cross noticeably lower than the lower limit.

• Set the volume on the sub to something around 50%.
• Set the phase on the sub to 0°.
• Use the LFE input on the sub, if present. If there is none, turn the crossover frequency dial all the way up to the highest possible value. You don't want and don't need the sub to apply it's own filtering.
• In the WiiM Home App, just start with a default between 80 and 90...

• harkpabst

• 

I have no first hand experience with the SVS software. From the top of my head I seem to remember that it supports one PEQ filter through its DSP and there's nothing wrong with using it.

I would start with a default setup as described above. Leave the filtering to the WiiM Amp Pro and disable the low pass filter (and DSP for now) on the 1000 Pro. Once your satisfied with the result, let the SVS app apply its DSP filtering (still avoid the built-in low pass filter). You might have to readjust the delay after this step. Finally, run the WiiM room correction algorithm RoomFit. Again, you can start with the defaults, but you will find a lot of advice on how to set it up according to your room and requirements.

Then just listen for some time. You can try out other options later, but you'll have to re-run RoomFit whenever you have changed your subwoofer settings in any way. Good luck and have some fun!

 

[Andrew78]

Hi, thank you for your help!

I found an interesting guide on the svs site to best match the SVS SB1000 pro with my Polk Monitor XT20 (I'll leave you the link below):

Merlin - Quick Start Guide

www2.svsound.com

1) LFE active on the Subwoofer and cut at 80 HZ (on wiim app) --> then run wiim room correction

2) On Wiim Amp Ultra:
- Subwoofer bypass mode: On
- Main Speakers output bass: On

On the SVS App:
Set the subwoofer amplifier's low pass filter frequency to 60 Hz. Set the subwoofer amplifier's low pass filter slope to 24 dB/octave.
(This is the optimal low pass filter setting for your SVS subwoofer when operating your Polk Audio Monitor XT20 Bookshelf Speaker loudspeakers full bandwidth.)
Finally run wiim room correction

As soon as I get the subwoofer I would start with these two configurations.
Let me know what you think!
thanks a lot

 

[harkpabst]

2) On Wiim Amp Ultra:
- Subwoofer bypass mode: On
- Main Speakers output bass: On

On the SVS App:
Set the subwoofer amplifier's low pass filter frequency to 60 Hz. Set the subwoofer amplifier's low pass filter slope to 24 dB/octave.
(This is the optimal low pass filter setting for your SVS subwoofer when operating your Polk Audio Monitor XT20 Bookshelf Speaker loudspeakers full bandwidth.)
Finally run wiim room correction

Yup, this is exactly how I would not do it.

All those setup guided do not take into account the bass management capabilities of the WiiM Amplifiers and the WiiM Ultra. You're bette off following roughly the procedure for AVRs. These tiny 5.25" woofers will benefit from high pass filtering at 80 Hz (less cone movement, less distortion).

As I said, this is my personal recommendation. You're free to try it either way and there's nothing wrong with spending some time fiddling.

 

[Andrew78]

Yup, this is exactly how I would not do it.

All those setup guided do not take into account the bass management capabilities of the WiiM Amplifiers and the WiiM Ultra. You're bette off following roughly the procedure for AVRs. These tiny 5.25" woofers will benefit from high pass filtering at 80 Hz (less cone movement, less distortion).

As I said, this is my personal recommendation. You're free to try it either way and there's nothing wrong with spending some time fiddling.

Okay then I'll go with option 1. LFE active and cut to 80hz. After that I will try to refine further from these settings.