Topic: High pass filter for REL subwoofer integration ?

Hello,
I'm not sure and therefore ask question before :-)
Looking to integrate my REL 7I subwoofer with speakers around 50hz.
Will this work?

Under the I/O menu, scroll the knob (2) to enter the parametric EQ settings for LINE OUT.
Enable EQ, set to ON
Under Band 1 type, set it to "highpass"
Then under Band 1 Frequency set it to whatever frequency that you want to highpass.

Thanks

2 (edited by KaiS 2020-06-03 16:51:09)

Re: High pass filter for REL subwoofer integration ?

You don't tell anything about your configuration.
Not even which ADI-2 you have.

The subwoofer should be feed with an unfiltered signal.
So the simple answer is "No", if the sub is connected to the same output it would not get the bass signal if you run through a highpass filter.



I've read through your other postings and found you've got the ADI-2 DAC.
ADI-2 DAC has ONE DAC or digital output path only.
You cannot apply a filter just for the Line-Out only.

So it stays with what I've written above.


Connect the sub in parallel to the satellites, rely on the satellites built-in highpass filters.

If you got an iPhone download AudioTools free version, the best little Real Time Spectrum Analyser around to get visual help setting sub's room position, x-over frequency, phase and level.

Re: High pass filter for REL subwoofer integration ?

Sorry,
I have ADI-2fs connected to my tube integrated.REL sub is connected to integrated speakers output.
Thanks

4 (edited by KaiS 2020-06-03 16:45:02)

Re: High pass filter for REL subwoofer integration ?

If you highpass no bass comes out of ADI-2 DAC FS (the one you have, yes?! )

There are 3 ADI-2s:

ADI-2 FS: no display, no DSP like EQ
ADI-2 DAC FS: display, DSP, no analog input / ADC
ADI-2 Pro FS: display, DSP, analog input

Re: High pass filter for REL subwoofer integration ?

Yes I have ADI-2 DAC FS and when you said no bass coming out......you're referring to dac outputs where no subwoofer is connected. My REL subwoofer is connected to speaker level output and I adjust the crossover integrated within the sub.
I cut at 50Hz and to my ears mids are cleaner with dac high-pass filter in place.
Still I am wrong? :-)

6 (edited by KaiS 2020-06-03 17:53:37)

Re: High pass filter for REL subwoofer integration ?

Your ADI-2 DAC FS is the source your music is comming from, right?
The speaker level output gets the sound from ADI-2 DAC too, yes?

Now, if you highpass in ADI-2 DAC FS you filter away the bass from your music.


As a test, set the High Pass Filter Frequency to 2kHz, bass is ALL gone, even the sub is silent, right?



If 50Hz highpass sounds better to you, your sub is not setup well.

This is what counts:
• position in the room (little moves of 20cm can make a difference)
• x-over frequency
• x-over phase (if available)
• sub level.
Each influences each other.


No chance to set this even close to good without analyzer if you're out for a natural sound.
If one wants just some "boom, boom ..." it doesn't matter, but you don't seem to be alike.

Get the mentioned App.
I'll explain how to use it.

7 (edited by tcb_38 2020-06-03 19:24:06)

Re: High pass filter for REL subwoofer integration ?

"Connect the sub in parallel to the satellites, rely on the satellites built-in highpass filters."
REL sub comes with a connection cable to high level speaker connection.This being REL recommendation to best way to connect sub to a system.
Second, my main speakers are single 5' driver (OMEGA SUPER 3XRS)

Re: High pass filter for REL subwoofer integration ?

just bought Audio Tools Pro version.I would appreciate your input on how to use all 3 apps: RevMeter Pro, dBMeter Pro and RTA Pro
Thanks again. :-)


KaiS wrote:

Your ADI-2 DAC FS is the source your music is comming from, right?
The speaker level output gets the sound from ADI-2 DAC too, yes?

Now, if you highpass in ADI-2 DAC FS you filter away the bass from your music.


As a test, set the High Pass Filter Frequency to 2kHz, bass is ALL gone, even the sub is silent, right?



If 50Hz highpass sounds better to you, your sub is not setup well.

This is what counts:
• position in the room (little moves of 20cm can make a difference)
• x-over frequency
• x-over phase (if available)
• sub level.
Each influences each other.


No chance to set this even close to good without analyzer if you're out for a natural sound.
If one wants just some "boom, boom ..." it doesn't matter, but you don't seem to be alike.

Get the mentioned App.
I'll explain how to use it.

9 (edited by KaiS 2020-06-04 14:36:45)

Re: High pass filter for REL subwoofer integration ?

tcb_38 wrote:

just bought Audio Tools Pro version.I would appreciate your input on how to use all 3 apps: RevMeter Pro, dBMeter Pro and RTA Pro
Thanks again. :-)

Unfortunately you loaded the wrong App that doesn't do the job, too shaky display.
I didn't know there is another one with almost similar name:

What I meant is RTA from AudioTools by Andrew Smith / Studio Six Digital, a real pro measurement system.

It has all necessary pro settings and can use the iDevice's microphone as calibrated measurement mic!


I'm using AudioTools for years now in the expensive full version.

Give back the other App (you get your money back).

Buy: "RTA“ by Andrew Smith, 5.49€ in the Appstore:
https://apps.apple.com/de/app/rta/id298839433

RTA from Studio Six Digital, Andrew Smith homepage:
https://studiosixdigital.com/audiotools … dules/rta/


RTA is the only App needed to setup your system.



I had a look at your speakers, very special and interesting ones.
Now I know why are you hear better midrange when you reduce the lower frequencies.

We will do that but go a little different way, preserving the OMEGA SUPER 3XRS fullrange/no crossover advantage.

We use the shelving filter to not cut, but reduce the bass, and fill the missing with the subwoofer.
This way you avoid a crossover transition, and loss in the very low frequency range that the highpass does cause.
Resullts in more transparent sound due to largely reduced load on the speaker on a frequncy range that needs lots of driver's excursion.


Advice in the next posting, have to write it.

10 (edited by KaiS 2023-11-18 11:54:48)

Re: High pass filter for REL subwoofer integration ?

How to setup ADI-2 DAC or ADI-2 Pro in a setup with
main speaker+subwoofer.

The following sounds a bit lengthy and complicated, but is in fact quite straigth forward and can be fun.


What we need:

• iPhone/iPad with "FFT“ by Andrew Smith, $12 in the Appstore:
https://apps.apple.com/de/app/fft/id298840058
Or, if you like a more coarse view, RTA:
https://apps.apple.com/de/app/rta/id298839433


• Something to place the iDevice in free air at the listener's position, e.g. a photo tripod, a selfiestick, or any stick+tape, or any mount.
Don't lay the iDevice on something big, this would disturb the soundfield around it’s mic.

• Pink noise from any source.
The AudioTools' FFT and RTA have a generator built in.
You can either connect this iDevice, or a 2nd one with the same app (that's what I usually do), or use PinkNoise from a CD or from Youtube:
https://m.youtube.com/watch?v=ZXtimhT-ff4


• In AudioTools FFT / RTA's Setup "Mic Compensation Filter", and "Measurement Mode" should be Enabled.
Set "Output Mode" to "Mono", not "Balanced"!


• Switch OFF the subwoofer.
• Set FFT to Equal Points/Octave, 1/3 Octave smoothing, Average — or RTA to 1/3 Okt., 30s Decay.
• Look at the room noise.
• Play the Pink Noise.
• Dial in a Pink Noise level 15-20dB above room noise.
The average from 100Hz to 1kHz should meet a scale line, as reference line.
• Switch OFF the main speakers, ON the sub.
• On the sub's controls, set the level at:
(case 1): One output - main/sub on the same ADI-2 DAC / PRO output: 10dB,
(case 2): Two outputs - main/sub on separate ADI-2 PRO outputs: 3dB,
- above the the FFT’s / RTA's reference line, with sub's x-over frequency try to find a range between 60-110Hz that looks the most linear. Make a pencil mark.
(case 1):
On ADI-2 DAC, use the lowest EQ band: Shelving, Level -8dB, f=like sub, Q=0,7, as a startpoint.
(case 2):
On ADI-2 Pro, use the lowest EQ band: HighPassFilter, f=like sub, Q=0,7, as a startpoint.

• Now, switch the main speakers ON too, linearize the response by playing with:
- the sub's phase switch,
- the EQ settings, but only the low band.
- the sub's frequency control around the pencil mark,
- and a bit with the sub's room placement if possible.

These are all interactive.

Goal is a slightly, 3dB, elevated bass and a relatively linear bass response.
With a good setting you can counteract room resonances too.
Don't care about higher frequencies at this point.


Take notes when you found a good setting before trying another.
Listen to music inbetween if you found a good setting.

Re: High pass filter for REL subwoofer integration ?

This look bad for 25 Hz ?
My sub is  -6dB at 30 Hz

https://drive.google.com/file/d/19jqjTz … sp=sharing

12 (edited by KaiS 2020-06-05 18:40:52)

Re: High pass filter for REL subwoofer integration ?

This looks simply perfect, well done, gratulations!

How does it sound?

Re: High pass filter for REL subwoofer integration ?

TCB...

Exciting to see your progress with this endeavor!   Well Done!

Maaaaannnnn!!  ..there is nothing that is more of an "upgrade" than getting your Speakers, and Room to play nicely together!  That's Big!

Good for You! 

Enjoy!

Curt

Vintage 2018 ADI-2 DAC. "Classic AKM4490 Edition"
Cables:  Red, and White Ones.
Speakers:  Yes

Re: High pass filter for REL subwoofer integration ?

Thanks,still learning and reading :-)
I love this dac !

15 (edited by Curt962 2020-06-05 19:22:46)

Re: High pass filter for REL subwoofer integration ?

Cool!

We all love our RMEs.   It's an amazing piece of gear! 

Enjoy your newfound dimension in listening!

Best in Good Sound,

Curt

Vintage 2018 ADI-2 DAC. "Classic AKM4490 Edition"
Cables:  Red, and White Ones.
Speakers:  Yes