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Cut lower frequency to help my bookshelf speakers

Dear All,

I try to open a new topic… which i did not find in the previous discussion so maybe is new to the most

 I have a 2 channels system which i want to improve with a minidsp or eq

the question in short is the following:

i love my dynaudio special 25 speakers but often i feel the need to have a better punch on the bass frequency

so i tried to add a couple of svs 1000 pro subs… with excellent results

point is that when i turn up the volume too much i feel the dynaudio midwoofer cone rattle when hit the lower frequency (actually the coil reaches the end of the air gap into the magnet)

so im thinking to add a dsp or eq to cut the lower frequencies before they reach the dynaudio

i have a pre audio research LS2 + amp mark levinson 23.5….. the idea is to add the dsp or eq in the middle and have the following configuration:


  1. connect the minidsp or eq. to the first rca out of the audio research (fortunately i have 2 rca and 2 din outputs) and then to the mark levinson …. in this way i could to cut all the bass frequency under 50 or 60 hz and have the levinson handle  the dynaudio 


  1. connect the 2 subs to the second rca out of the audio research and use the svs internal dsp with iphone app to calibrate them


Hope is clear… What do you think?


Better a miniDSP 2X4 or a Schiit loki mino+


Or anything else?



tks alot for any help or useful hint, best


Andrea


aurgolo

Showing 5 responses by fiesta75

fiesta75
1,378 posts
 
You can use an analog crossover or DSP to reduce the low frequencies to your Dynaudio speakers. High pass filter set to 80Hz. or higher. I personally like analog with a steep 24 dB/octave slope, but digital high pass is much cheaper. You won't be able to get the sound of larger speakers, so don't expect that, but should clear up the bass by reducing cone excursion of your 8" drivers at higher sound levels.
fiesta75
1,378 posts
 
Well based on the SVS1000's, I would say the OP is not really into high end, although the Dynaudio's are pretty good. If you don't want to spend a lot of $$, try the route of reducing the low frequencies to the Dyna's with some type of high pass filter, NOT an EQ. If you want big sound and volume, you will need bigger speakers.
fiesta75
1,378 posts
 
OP is you, original poster. Somehow reduce the bass below 80Hz. or a little higher to your Dyna's using some type of high pass filter. You're trying to reduce how much your 8" woofers need to move.
fiesta75
1,378 posts
 
1) The SVS 1000pro does not have a high pass filter. The app is only for the sub, no output to your main speaker amplifier.
2) A high pass 12dB/octave slope set at 80Hz. will yield 1/16th power to your Dyna’s at 40Hz., that’s 0.0625 times the power at 80Hz. which should yield much better sound from the Dyna’s bass region.
3) Node2 only has a 3.5 mm analog or optical inputs. This is only good for device like a smartphone or something with an optical input as a source. Not needed for what you’re trying to accomplish.
4) Maybe the Schiit loki mino, that if it has adjustable frequency bands. Didn't look like it has adjustable slopes. You want a high pass filter with an adjustable filter frequency (80-100Hz.) to connect between your Audio Research outputs and the Mark Levinson inputs. I believe XLR’s would be your preferred choice, but RCA’s would work too.
5) Insert the "chosen device in #4" between AR and ML. Set high pass filter for 80 or 100Hz.
6) Adjust the SVS 1000 low pass filter to 80 or 100Hz. depending on your frequency choice in #5. You can try different slopes, for the sub 12dB up to 24dB/octave, start with 12dB/octave.
Maybe someone else can give a good suggestion for a variable high pass filter with XLR's?
fiesta75
1,378 posts
 
I do like the sound of ML, but they DO need peak indicators. How do you know you're not into clipping? My thought is if you are bottoming woofers on large speakers, you ARE into clipping. Make some peak indicators with an LED, resistor and zener diode. 
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