PMA980R Denon amp, subsonic filter function advice.

[zen]

Hi all

Subsonic filter doesn't seem to have any effect, whether on or off.

Can anyone help?

Manual might shed some light.

[spiros.p]

Re: PMA980R Denon amp, subsonic filter function advice.

what filter is this? 20-30-40 hz?under 40hz you don't listen nothing.only in heavy bass track and volume up you can see the bass woofer lose some movement when you careffuly looking.subsonic filter is allways good thing speakers and amps work more acurate and relaxing.other way if the amp + sub is designed for very low frequencies or you heard music in low comfortable level you left the filter in the off position.

[zen]

Re: PMA980R Denon amp, subsonic filter function advice.

Thanks Spiros

Not sure on frequency.

Will need to check user manual.

[zen]

Re: PMA980R Denon amp, subsonic filter function advice.

Discovered a very useful low frequency test on You Tube, from around 4HZ TO 20HZ.

Subsonic filter definitely makes a difference, taking the edge off the bass response, but to be honest with most music you wouldn't even notice it.

https://www.youtube.com/watch?v=n5visUIa2MY

[petehall347]

Re: PMA980R Denon amp, subsonic filter function advice.

its for when you are using a turntable

[zen]

Re: PMA980R Denon amp, subsonic filter function advice.

Hi Peter, can you give more detail please.

[petehall347]

Re: PMA980R Denon amp, subsonic filter function advice.

its to stop any rumble .or so i was led to believe

[diif]

Re: PMA980R Denon amp, subsonic filter function advice.

Vinyl can warp and this can cause woofer pumping where the warps cause undesirable sub 20Hz frequencies.
https://support.arendalsound.com/hc/...ubsonic-Filter

[zen]

Re: PMA980R Denon amp, subsonic filter function advice.

Ah that makes sense, cheers guys, therefore function seems to be working then.