6 replies to this topic

[jamie]

Please could somone advise me if running a set a pair of mw 170's with a pair of md 140's and a pair of 330 d esotar tweeters makes sense or not

i have noticed a few posts and see that people dont recomend using them 3- way

i will be running active with possible processing/ equalisation where needed

placement of the speakers is not an issue as i have no dash at the moment as i am building all interior from scratch.

please recommend on above issues as i'm a little confused as to what direction to take with my system


Cheers Jamie Down @ Liquid ICE

[jas]

could work extremely well

you could use active or passive

passive with the md140/2 could be 6db/oct 4.5-5khz (4.7uf for the tweeter works extremely well)

then you could use active for the mid/midbass dyn. not sure what point is recommended but i suspect something between 900hz and 3khz

other options for the mid rather than the md140/2

seas W15LY001 5 1/4 paper midrange which could intergrate with the esotar extremely well or a scanspeak 15M/4531K00 (both will be able to use 6db/oct x-overs and steeper). 2-5khz x-over 6-12db/oct. i would try 2.2khz @12db/oct on the first go.

seas lotus 4inch metal cone driver : Reference Mid-Range RM 110
its a little smaller than the dyn md140/2 and can reach a lot lower frequency so that you can cover a bigger range from the area near the tweeter (assuming you place the tweeter and mid together). this mid looks like it can reach down to 300hz safely @12db/oct. Would be a nice choice but would be a challenge to intergrate with the dyn esotar tweeter. Definitely have great results but would take a long time to get right. the metal midrange seas unit will require a high slope of 18db/oct or greater to reduce the metal cone breakup nodes above 4khz.


with a midrange that can cover a bigger midrange span you could then look for a dedicated midbass driver. an option would be the mw180 for midbass x-over point around 150-300hz. The mw180 would give you a lot more midbass and fun over the smaller dyn midbass units.


anyway food for thought

i love the esotar tweeter and its one of the best choices for a relaxing enjoyable system. Whatever you decide the esotar is an amazing prodct that will work in any system setup you choose..if you have the room for it.

Edited by jas, 13 October 2005 - 01:13 PM.

[mosoto]

The 330D esotar has a wide frequency response and is quite suitable for 2-way applications. ( see Dynaudio site) I see nothing wrong with adding the MD140/2 to enhance the midrange but may be overkill with such a supposedly high end tweeter. again depends on how much $ you want to throw at it.

[Wasnt Me]

I personally would get a second set of 170 if you wanted to get something. Otherwise leave it as 2 ways as those tweets sound INCREDIBLE!!!!!!!!!!!

Aural heaven =)

[shiny_car]

should be fine. i run an active 3-way front stage utilising the smaller MW160 + MD140/2 + morel supremo tweeters. my xover settings (from memory) are:
*BP of woofer: HP 80Hz 24dB/oct + LP 630Hz 12dB/oct
*BP of midrange: HP ~700Hz 12dB/oct + LP 1.6kHz
*HP of tweeter: ~1.7kHz

i'd have to check the settings but it's pretty much like that. works extremely well. i also have a 31-band EQ to help smooth the frequency response right out.

[jas]

shiny those x-over points seem a little extreme

are you sure you use those values

howerver there is something that might make these usable

ive just read a review of the alpine f1 status processor

as you know digital processing doesnt have the frequency or phase flaws normal analogue filters exhibit. Yes you have linear phase due to half the length of the FIR filter and slight phase errors but these are nothing compared to the normal active solution.. butterworth and other alignments trade off one or the other for a desired result. when we choose an alignement we know the cut off point will be a certain db down 3, 6, 12, 18, 24 depending of values chosen. HOwever with digital the db down point is up to the dsp engineer.

if the x-over point using a 12db/oct slope the alpine f1 status was -6db. This means that your points could just and i mean just be chosen for safe operation. BUt if this isnt the case and all x-over slope points represent -3db/oct houston we have a problem.

anyway im still surprised by your choice of x-over point, but if it works and sounds incredible then thats all that matters.

[shiny_car]

i confess i didn't fully understand what you just said!

there are many theories about phase alignment and various xover slopes that minimise the issues, but indeed i run the F1 processor, using active xovers that avoid much of it.

jas, on Oct 14 2005, 11:57 AM, said:

shiny those x-over points seem a little extreme

<{POST_SNAPBACK}>

what do you find extreme? the xover points are well within the frequency response of the drivers used, and xover slopes are chosen are not unusual (albeit dynaudio typically use 6dB/oct slopes).

i'm away from home this week for work, so the car isn't hear to check.