As mentioned above my amplifier( harman/kardon AVR255) doesn't have a crossover setting for subwoofer (klipsch r-115sw). I have put the subwoofer crossover on the lowest setting because it doesn't cut all the frequencies above 20hz (which is the lowest). Is there any ideas on how to cut the unessesary frequencies from my sub? I have thought of something like the pasted link below. I dont know if it's a good idea since I want to keep the amplifier. If you have another idea on how to do it will be highly appreciated.
https://dbmelectronics.gr/ihos-auto...tis-entasis-proenishusis-low-pass-filtro.html
I know it's a Greek website since I come from Greece. But I guess you will be able to look at this part. I appreciate everybody's help!
https://dbmelectronics.gr/ihos-auto...tis-entasis-proenishusis-low-pass-filtro.html
I know it's a Greek website since I come from Greece. But I guess you will be able to look at this part. I appreciate everybody's help!
I appreciate as your first language is Greek, you may not have expressed yourself in English, exactly how you wanted to - however:
I would've thought you would set your sub's roll-off frequ to 50 - 70Hz?
And if you really want to integrate your sub well ... you need to install REW on your PC, get a microphone ... and start measuring!
- if your HK AVR255 "doesn't have a 'crossover setting' for subwoofer" ... that's fine - as your sub surely has a control which sets its roll-off frequency?
- in which case ... find out what your main spkrs' "-3dB point" is - and set the sub's roll-off frequ to this.
I would've thought you would set your sub's roll-off frequ to 50 - 70Hz?
And if you really want to integrate your sub well ... you need to install REW on your PC, get a microphone ... and start measuring!
I have currently set my subwoofer to 20hz on the subwoofer crossover but the subwoofer plays up to 60hz despite the fact the crossover is set at 20hz. That's why I'm looking to cut the frequencies over 40hz so that the subwoofer plays 40hz and lower.
Aah, OK ... it would seem the LP filter used by your sub is not steep - perhaps only 12dB?
If so, given the sub's 'XO setting' is the -3dB point (ie. the frequ where the signal voltage has dropped to 0.7 of the input) ... it will certainly be producing some sound at 60Hz.
You can get round this problem by:
- turning up the sub's LP frequ to max
- and then using an external sub-management box (like a miniDSP 2x4HD) to manage the XO between sub and mains. You will be able to use 48dB slopes. 😱