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Dec 22, 2008

Bass over excursion or port noise - Turn Down For What?

I have had the S1 Pros for some time now and feel that this is very important to bring up. I have done many tests with the S1 Pros as well as a few gigs and have noticed something that I touched in my S1 Pro Review post, but now I would like to talk directly about my findings. 

I feel this data is very important since this unit is being advertised as a PA system and also includes Bluetooth. 

For those of you who are live performers this issue probably will never affect you. 

The S1 Pro has great bass response for rock, county and most pop music... but when it comes to really low frequencies the S1 bottoms out and sounds rather bad. 

Case and point... play the popular dance track “Turn Down For What?” and you will exactly what I mean (I had this song requested at the last gig I did). In this test you will hear what I am talking about way before you see the red signal lights flicker.... the bass sounds distorted. I am not sure if the sound I am hearing is the woofer distorting or really bad port noise. 

BTW I have three S1 Pros and they all behave like this, so I am pretty sure it is not a defect in the units.

I really think this needs to be addressed. 

The S1 Pros do this with other songs as well as when we watch certain movies with a lot of this low end information in the audio. 

If this new system wasn’t made for prerecorded music playback I wouldn’t really this issue is that critical, but it is. None of the other speakers in the Bose Portable PA line up have a real issue with these low frequencies... if they can’t reproduce the frequencies well they just don’t try too hard. I am sure this is due to some internal circuitry... 

Perhalps this could be fixed with a simple firmware update. 

Again, this will not affect most of you... just those who plan to use it as a PA for a small dance (especially if you play curtain tunes). 

BTW at the gig I was referring to above I ran my mixer through a F1 sub... how I got around the bad sound from the S1 Pros while playing “Turn Down For What?” was I engaged the HPF on the F1 sub... I tried just turning down the bass on the eq on the S1 Pros but the rumbling sound was still there... 

I do realize these are small speakers, but you should’t have to tiptoe around on the playlist of the night. 

 

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Feb 20, 2018

Re: Bass over excursion or port noise - Turn Down For What?

Good Info thanks

im planing to get 2 S1 Pro for small Dj gigs

now you make me worry 

 

do do you have any videos of you’re gigs

using the Bose S1 Pro? I would like to see

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May 11, 2020

Re: Bass over excursion or port noise - Turn Down For What?

Hi JD,

I ran the through my SoundCraft Ui16 so I could take a look at the track you mentioned (Turn Down For What?). Most of the time it looked like this.

A closer look.

That's just information.

I just ran the track via Bluetooth to the S1 Pro and ran the volume up to point of seeing red flickers.  The S1 Pro handled it gracefully; no earth shattering lows, but nothing objectionable.

jdbassentertainment.com posted:
? - ? - ? - ? - ? - ? - ? - ? - ?

BTW at the gig I was referring to above I ran my mixer through a F1 sub... how I got around the bad sound from the S1 Pros while playing “Turn Down For What?” was I engaged the HPF on the F1 sub... I tried just turning down the bass on the eq on the S1 Pros but the rumbling sound was still there... 

Double checking your signal path:

  1. Mixer to F1 Subwoofer
  2. F1 Subwoofer was set to HPF (High Pass Filter)
  3. F1 Sub LINE OUT to S1 Pro

Is this the setup where you were getting bad sound from the S1 Pro?

There should have been very little below 100 Hz going to the S1 Pro

ST

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May 11, 2020

Re: Bass over excursion or port noise - Turn Down For What?

Hi JD,

I just set this up using https://www.youtube.com/watch?v=HMUDVMiITOU (the same track from which I got the screen shots in my post above)

Here's the signal path.

  1. Computer via USB to PreSonus AudioBox 22VSL (USB interface)
  2. PreSonus AudioBox 22VSL to Soundcraft Ui16 (Mixer)
  3. Soundcraft Ui16 to F1 Subwoofer
  4. F1 Subwoofer was set to HPF (High Pass Filter)
  5. F1 Sub LINE OUT to S1 Pro

I turned everything up to clipping, and I couldn't get anything that sounded like what you said below.

jdbassentertainment.com posted:
? - ? - ? - ? - ? - ? - ? - ? - ?

The S1 Pro has great bass response for rock, county and most pop music... but when it comes to really low frequencies the S1 bottoms out and sounds rather bad. 

Case and point... play the popular dance track “Turn Down For What?” and you will exactly what I mean (I had this song requested at the last gig I did). In this test you will hear what I am talking about way before you see the red signal lights flicker.... the bass sounds distorted. I am not sure if the sound I am hearing is the woofer distorting or really bad port noise

? - ? - ? - ? - ? - ? - ? - ? - ?
Then I tried it with the F1 Subwoofer EQ set to THRU. Even then, it didn't sound bad.

Please post a recording. Let's get to the bottom of this. Sorry, the pun was irresistible.
Thanks,
ST
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Re: Bass over excursion or port noise - Turn Down For What?

BTW the signal chain I am using is just Bluetooth...

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May 11, 2020

Re: Bass over excursion or port noise - Turn Down For What?

Hi JD,

Thanks for the video. You're right, that sounds bad. And it's not what I hear from my S1 Pros.

What's your Bluetooth source? Have you tried using the same source and same track with a different receiving device?

ST

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May 11, 2020

Re: Bass over excursion or port noise - Turn Down For What?

Hi again JD,

jdbassentertainment.com posted:

BTW the signal chain I am using is just Bluetooth...

OK - I was thrown by the following in your original post.

jdbassentertainment.com posted:
? - ? - ? - ? - ? - ? - ? - ? -

BTW at the gig I was referring to above I ran my mixer through a F1 sub... how I got around the bad sound from the S1 Pros while playing “Turn Down For What?” was I engaged the HPF on the F1 sub... I tried just turning down the bass on the eq on the S1 Pros but the rumbling sound was still there...

That's why I did my second round of tests using the F1 Subwoofer.

In my first round, I ran the track

https://www.youtube.com/watch?v=HMUDVMiITOU 

on my computer and connected via Bluetooth to the S1 Pro.

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May 11, 2020

Re: Bass over excursion or port noise - Turn Down For What?

Hi JD,

Here are some videos I just took using this

https://www.youtube.com/watch?v=HMUDVMiITOU 

as the source.

Have you tried this video played from your computer via Bluetooth?

https://www.youtube.com/watch?v=HMUDVMiITOU 



ST

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Dec 22, 2008

Re: Bass over excursion or port noise - Turn Down For What?

The S1 Pros acts the same way on tracks with that type of those type of low frequencies when used with  with F1 sub/DJ mixer and straight Bluetooth on my IPhone. 

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May 11, 2020

Re: Bass over excursion or port noise - Turn Down For What?

Hi JD,

Are you getting the same distortion even when you route the signal through the F1 Subwoofer exactly like this?

  1. Source to F1 Subwoofer - Input 1 - LINE INPUT
  2. F1 Subwoofer set to HPF (High Pass Filter)
  3. F1 Subwoofer - Input 1 - LINE OUT to S1 Pro


Also, please try your set up with this video

https://www.youtube.com/watch?v=HMUDVMiITOU

Let's eliminate as many variables as possible.

Thanks,

ST