big mattress reduce bass？

[senuc]

Hi guys，in pic is my bed room，I put a 150cmX 200cm ， 18cm thick mattress just on the floor，the bass sound reduced on the listening position

 

[DVDdoug]

That's believable...

You probably aren't absorbing the deepest bass but a mattress might absorb some bass and some higher frequencies.

...Bass traps are normally designed to absorb most of the reflected bass. This reduces standing waves, smoothing out both the bumps and the dips for overall smoother-flatter bass. The bumps can be pushed-down with EQ but the dips can't be fixed with EQ because you have wave cancellation and it takes tremendous power and huge woofers to overcome the cancellation.

 

[McFly]

The listening position didn't change? Yeah i'd say possible. But if listening position changed then all bets are off, bass will certainly be different.

 

[senuc]

I can change the big mattress to a small bed like this，and put a thin matress on bed，is that help？

 

[senuc]

The listening position didn't change? Yeah i'd say possible. But if listening position changed then all bets are off, bass will certainly be different.

in corner the bass is much better

 

[Chrispy]

Or perhaps could compensate with eq and keep the thicker mattress for comfort Using a sub or ? If a sub, you could try moving it around....

 

[senuc]

Or perhaps could compensate with eq and keep the thicker mattress for comfort Using a sub or ? If a sub, you could try moving it around....

as the @DVDdoug said , maybe the upper bass is reduced much, when I shutdown the sub , the speaker has no bass which they should have in other room

 

[Chrispy]

as the @DVDdoug said , maybe the upper bass is reduced much, when I shutdown the sub , the speaker has no bass which they should have in other room

I didn't see you mention a sub vs speakers at all. We're all guessing without details. What are the speakers/sub involved and how are they integrated?

 

[senuc]

I didn't see you mention a sub vs speakers at all. We're all guessing without details. What are the speakers/sub involved and how are they integrat

roon eq High pass , Low pass -> topping dm7 8 channels dac -> speakers and sub(pascal powered sub)

 

[Chrispy]

roon eq High pass , Low pass -> topping dm7 8 channels dac -> speakers and sub(pascal powered sub)

Interesting, didn't know roon could handle high pass/low pass like that. Tried moving the sub around, tho? Concerned only about your position in bed?

 

[senuc]

Interesting, didn't know roon could handle high pass/low pass like that. Tried moving the sub around, tho? Concerned only about your position in bed?

yes roon eq can control high/low pass for every channel , dm7 can adjust gain for every channel ,they work perfect to my ear in other room,but now my life changed , I can only put these stuffs in my bed room

 

[droid2000]

yes roon eq can control high/low pass for every channel , dm7 can adjust gain for every channel ,they work perfect to my ear in other room,but now my life changed , I can only put these stuffs in my bed room

Roon can control more than two channels?

 

[johnhopfensperger]

A mattress can definitely help in a bare room. After hearing how boomy my room got when I took the mattress out, I decided to build a pair of 24x16 inch floor-to-ceiling absorbers. They reduce the reverb time somewhat better than a single mattress, but they don’t seem to do much below 100hz.

…I’m assuming your post means you like it better with the mattress than without? Small rooms already tend to have way too much low end without eq, I can’t see how more would be better.

 

[Chrispy]

yes roon eq can control high/low pass for every channel , dm7 can adjust gain for every channel ,they work perfect to my ear in other room,but now my life changed , I can only put these stuffs in my bed room

Well a high pass/low pass on one channel isn't very meaningful, so Roon can output how many channels? I thought it was just 2ch.

 

[senuc]

Roon 可以控制两个以上View attachment 293639View attachment 293639View attachment 293640

那么一个通道上的高通/低通意义不大，那么 Roon 可以输出多少个通道？我以为只有2ch

as the pics show, mix the left 、right to any channel u want ,then EQ them separately

 

[Chrispy]

as the pics show, mix the left 、right to any channel u want ,then EQ them separately

As long as you have supporting hardware I assume? The screenshots don't do a lot for me.

 

[Andysu]

mattress just changes alters the frequencies , wonder if i should buy some for bass traps , after all they are cheaper than actual bass traps and if they don't work i can always just add them to the bed for extra comfy sleep

i think the other is making a platform that has opening at the back it gives the impression the bass is bigger or something like that ? learnt that a music technology collage , i think a coke bottle is also mentioned , something do with filling it and blowing air around the opening that changes the resonate frequency

 

[wwenze]

Mattress vs no mattress

UMIK-1 in listening position pointing up using 90-degree cal

 

[CapMan]

Well a high pass/low pass on one channel isn't very meaningful, so Roon can output how many channels? I thought it was just 2ch.

2 channel only as far as I am aware - certainly is for all the Roon endpoints I have. You EQ the whole lot

 

[voodooless]

I can change the big mattress to a small bed like this，and put a thin matress on bed，is that help？

This may possibly make it worse. The air-gap and a thinner absorber will also be quite effective at trapping bass.