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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
aurgolo OP
16 posts
 
Tks everybody for the suggestions

@gregm ... i also thought about the rca out of the svs... but the manual says that those are to connect several svs in line... so im not sure that it is a high-pass output
Even if i can mamange to use the rca out as a high-pass filter im not sure the quality is aligned with the rest of the system

@diones51... the 2x4 HD has a DAC which i dont need, so why not buy just the 2x4... i think thay are the same 

Also why use the 2x4 to pilot the 2 SVS?.... they have a good DSP and iphone app which is very flexible (6,12,18, or 24dB slope, volume, phase 0\180, and several presets in memory)

Im just concerned that the minidsp could somehow degrade the overall quality (im old school... the less you put in the music path the best you get)


@imhififan ... yes im sure it will help, im just worried about the potential degrade of the sound (see above)
djones51
4,947 posts
 
Both the 2x4 and 2x4HD use the same DAC the difference is the better DSP engine. 
aurgolo OP
16 posts
 

"Both the 2x4 and 2x4HD use the same DAC the difference is the better DSP engine"

got it!
aurgolo OP
16 posts
 
I found another solution:

the node2 on the rear panel has the analog output L\R and a single sub rca out with high pass filter (which means that when i enable the sub out i can cut the main rca L/R out from 40 to 200 hz)

i can use that ... in this way no minidsp in the between pre and amp and no double conversion AD/DA
(even if the node2 onboard filter is not the best of the best i avoid the double conversion with the external minidsp)

then i will connect the sub rca out of the node2 to the first sub and daisy-chain the second sub (or split the cable)... at the very end calibrate them with the iphone app and their dsp

I should only check if the node2 output level controls both rca and sub out... but i think yes, why not




 
mapman's avatar
mapman
22,199 posts
 
No. Lower frequencies require exponentially more power. Its where most of the work is done, especially if we are talking full range down to 20hz. Smaller drivers will have to work much harder to produce those lows than larger all else remaining the same, just like a smaller engine in a larger car.   Smaller drivers will tend to heat up more and compress.   So it’s always advantageous to have the transducer best suited to handle the frequency deliver the frequency. Even more important is we are generally talking about powered subs which also typically provide a beefy amplifier specifically designed to deliver the power needed for that flat extended bass. Most main amp/speaker combos will never be able to keep up with a good powered sub in terms of delivering clean, undistorted, extended bass. It’s also more cost effective and practical to buy a powered sub for that purpose. Full range speakers capable of doing it will tend to be be large, heavy and pricey if also built well. But of course as always, there are many ways to slay the beast.
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