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Dynaudio Monitor, crossover freq.
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Juanma
Started Topics :
6
Posts :
16
Posted : Nov 5, 2008 10:35:22
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Hello!! I have a question about the crossover frequencies on the Dynaudio bm6a and the bm6a mkII
in the review it says:
Probably the most significant change would be the redesign of the crossover: the BM 6A has the crossover frequency at 2.2 kHz with a 24 dB/octave slope, while the new mkII has the crossover frequency set at 1.5 kHz with a 6 dB/octave slope.
I see the difference is big, but WHAT SHOULD SOUND BETTER ACCORDING TO THE CROSSOVER FREQ?
thanks!!!!
Juanma
www.myspace.com/juanma83 |
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Upavas
Upavas
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150
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3315
Posted : Nov 5, 2008 11:46
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That depends on the accuracy level of the individual speakers of each speaker. Depending on what frequencies they transduce most accurately a crossover is dividing the signal and sending each of the divided signals to one speaker.
If a crossover frequency of 1.5 hz with a slope of -6db per octave is set that means that the low end speaker will receive everything below and the high end speaker everything above it. I guess they found the sweetspot for the new model to be different...
It would suggest that the tweeter transduces frequencies around the 1.5 hz range and some below (note the -6db per octave cutoff) more precise than the low end speaker and on the other system vica versa.
Also since it is only a 1 pole filter it would suggest that the overall signal is probably more accurate, since both speakers give a part of everything below 1.5 khz, at least if it is given that both components of the speaker transduce the signal (at the given hz frequencies and everything that is not cut off below 1.5khz) with that level of precision. Upavas - Here And Now (Sangoma Rec.) new EP out Oct.29th, get it here:
http://timecode.bandcamp.com
http://upavas.com
http://soundcloud.com/upavas-1/ |
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Trip-
IsraTrance Team
Started Topics :
101
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3239
Posted : Nov 5, 2008 14:37
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Jaunma, what Upavas said, plus:
These are design facts. The speaker is built to produce steady flat freq response across the given freq range. How it does it won't matter much to you unless you want to get into the monitor building or just broadening the mind about how monitors work.
Yes, a lower frequency crossover between the drivers might 'suggest' the LF to act more accurately, across a smaller range than it is on a higher frequency crossover. But, it doesn't mean that's the case. Every design have many variables that eventually combine the monitor when you can evaluate its real quality.
Crackling universes dive into their own neverending crackle...
AgalactiA |
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Juanma
Started Topics :
6
Posts :
16
Posted : Nov 5, 2008 17:49
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thanks a lot bros!! that help me to understand how do they work and the difference between one crossover freq and another.
cheers! |
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index
IsraTrance Junior Member
Started Topics :
36
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548
Posted : Nov 6, 2008 01:15
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subconsciousmind
SCM
Started Topics :
37
Posts :
1033
Posted : Nov 6, 2008 09:57
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I think it's really hard to tell. Steeper crossovers have more phase shifts..
On the other hand going lower with the crossover freq AND having a flater slope means that the mid-high speaker has to transmit far lower frequencies now and the bass-mid has to transmit less higher frequencies.
It's possible, that they found the bass speaker messing up the mids around 2khz, so they cut him out earlier..
On the other hand the highspeaker needs to transmit a wider range and therefore I suppose the max power of it needs to be higher to achieve same volumes..
Basically.. listen to both.. decide what's better for you. Telling from the crossover alone is impossible. is it the only thing they changed? are there other speakers in it too? did they compensate anything with the amps?
It's pretty sure, that they did some frequency correction with the crossover.. maybe they could make it better with the flatter slope...
Most of my music for you to download at:
http://www.subconsciousmind.ch |
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Juanma
Started Topics :
6
Posts :
16
Posted : Nov 6, 2008 14:49
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well, they say it is the most significant change (the crossover freq) from the bm6 A and the new bm6A mkII, however the most expensive are the older ones, and it can be seen has better amps (mofset) than the new ones, also I see they get a bit lower on the frequency response but also I have did read that the new ones sound clearer, but it is curios they are cheaper. (i imagine cause the amps)
i feel so indecise
any ways I'll try to listen to both, even though to try them in the shop is a bit weird to really see which one sounds better, but I'll try.
thanks a lot!!! All the best!!
www.myspace.com/juanma83 |
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PoM
IsraTrance Full Member
Started Topics :
162
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8087
Posted : Nov 6, 2008 14:53
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it s not cause of the amps they are more expensive it s cause of the hype , they used to cost around 700$ before |
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Upavas
Upavas
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150
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3315
Posted : Nov 6, 2008 23:50
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Juanma
Started Topics :
6
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16
Posted : Nov 8, 2008 02:10
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[quote]
On 2008-11-06 23:50, Upavas wrote:
Definitely what I would do, a-b both speakers with the music of YOUR choice 
what do you mean by a-b, to try them? yep, thats definitely what i'll do in the shop with my music...
....and see which ones i like the most, even is not gonna be the best place to try them.
do you guys have good experience with them?
thanks! |
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minus
IsraTrance Full Member
Started Topics :
103
Posts :
1614
Posted : Jan 25, 2011 19:02
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can someone share their setting for the bm6a's LF trim,Hf trim , running at -10 db,i get a strange hiss when i switch to -10, but no hiss on +4 setting? is that normal?
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minus
IsraTrance Full Member
Started Topics :
103
Posts :
1614
Posted : Jan 25, 2011 21:43
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p:s - specifically talking about the bm6a mk1
bomzom |
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