armani-thomas Posted February 16, 2015 Share Posted February 16, 2015 I'm planning to run my XTZ divine 100.49 3 way active, with help from a Marchand xm16 electronic crossover: XM16 48 dB/Octave Electronic Crossover Network Speakers: Divine 100.49 They are already prepared for going active with terminals for each driver. My question is if Dirac can fix group delay, and/or time align the drivers? Link to comment
flak Posted February 16, 2015 Share Posted February 16, 2015 Yes, it will.... downstream crossovering is an ideal solution and you will need the stereo version of Dirac Live only. As always you can double check yourself by downloading the free two weeks trial here: Online Store | Dirac Research Flavio Warning: My posts may be biased even if in good faith, I work for Dirac Research :-) Link to comment
armani-thomas Posted February 16, 2015 Author Share Posted February 16, 2015 Top nice! :-D Thank you for your reply. Already own the 8 channel version of Dirac, and it already sounds very good through the passive XO. The passive XO is a 3. order for the woofers and tweeter, and a 2. order for the midrange. With crossover points at 250hz/2500Hz. My plan is to try out 8. order Linkwitz, on all drivers, and at 200Hz/3000Hz instead. So next question must be, if I will get better sound going active? :-) Link to comment
blueixus Posted February 16, 2015 Share Posted February 16, 2015 Probably yes to getting better sound going active. The power amps will have much more control on the drive units so the detail retrieval is much better in my experience. That said unless you absolutely need the very step filters that 8th order Xo can produce I would question their merit over the classic 4th order. The reason i say this is simple, the greater the order the greater the circuitry (most 8 order crossovers are built from 4 x 2nd order circuits) so they are expensive and put the signal through more processing. I have used a 4th order with great effect. I feel it is a good middle ground. You are using 2/3rd order so it would seem that you can deal with shallower slopes. I have no comment on the Xo frequencies, these look quite regular and I assume match your drivers capability. I use Dirac (via Amarra) and I am very happy with the perform coupled with active XOs Trying to make sense of all the bits...MacMini/Amarra -> WavIO USB to I2S -> DDDAC 1794 NOS DAC -> Active XO ->Bass Amp Avondale NCC200s, Mid/Treble Amp Sugden Masterclass -> My Own Speakers Link to comment
flak Posted February 16, 2015 Share Posted February 16, 2015 Probably yes to getting better sound going active. The power amps will have much more control on the drive units so the detail retrieval is much better in my experience. Yes, I quote blueixus as I also personally favour active Xovering (if well implemented) over passive crossovers for several reasons Flavio Warning: My posts may be biased even if in good faith, I work for Dirac Research :-) Link to comment
sshd Posted February 17, 2015 Share Posted February 17, 2015 How can you time align the drivers without controlling them independently? Link to comment
flak Posted February 17, 2015 Share Posted February 17, 2015 Dirac Live will time align the regions of frequencies reproduced by the individual drivers no matter if the crossover is a passive or an active one Flavio Warning: My posts may be biased even if in good faith, I work for Dirac Research :-) Link to comment
armani-thomas Posted March 2, 2015 Author Share Posted March 2, 2015 What about the marchand xo's is that something you can recommend? Or are there other opportunities with RCA plugs? Link to comment
flak Posted March 4, 2015 Share Posted March 4, 2015 I cannot comment the Marchand units (as well as other brands), please note that I'm admittedly biased towards miniDSP but if you are looking for flexible solutions (at the cost of more work) you may also evaluate the following: Stereo 3/4way Xover Flavio Warning: My posts may be biased even if in good faith, I work for Dirac Research :-) Link to comment
armani-thomas Posted March 4, 2015 Author Share Posted March 4, 2015 Thank you Flavio. I'll explore the 4x10, which gives me the opportunity to time align two subwoofer groups besides my 3 way project. But as I see it, it should be pretty easy to setup. When I'm using Dirac, I can skip step 3 in the guide you linked, right? Link to comment
flak Posted March 4, 2015 Share Posted March 4, 2015 Right, if you know already the crossovering parameters that you want to apply you will not have to measure the drivers... if necessary you will find support, in addition to the manual, in the miniDSP tech-support forum here: MiniDSP :: Category Index Ciao, Flavio Warning: My posts may be biased even if in good faith, I work for Dirac Research :-) Link to comment
armani-thomas Posted March 4, 2015 Author Share Posted March 4, 2015 Just to be sure, with "crossovering parameters" you mean, crossover points and slope and nothing more? Link to comment
Gadgety Posted May 1, 2015 Share Posted May 1, 2015 Top nice! :-D Thank you for your reply. Already own the 8 channel version of Dirac, and it already sounds very good through the passive XO. The passive XO is a 3. order for the woofers and tweeter, and a 2. order for the midrange. With crossover points at 250hz/2500Hz. My plan is to try out 8. order Linkwitz, on all drivers, and at 200Hz/3000Hz instead. So next question must be, if I will get better sound going active? :-) Going active will enable your amplifiers to control the movement of your speaker elements more directly, thus improving transient reponse, for example. It will have a major impact, even if you have a good passive x/o today. Link to comment
armani-thomas Posted June 6, 2015 Author Share Posted June 6, 2015 Now I have bought the extra amplifier. A Rotel rmb-1565 5x100W class D. It will drive the tweeters and mid's. And my rb-1572 2x250w will drive the bass units. Now I'm just waiting for my minidsp 10x10, to show up. Link to comment
armani-thomas Posted June 15, 2015 Author Share Posted June 15, 2015 The minidsp has arrived. Right now its setup for 350Hz lowpass @ 48db LR, for the bass. And the Accuton midrange is crossed at 300Hz, don't remember the slope but think I chose 24db BW. And it's lowpass at 2800Hz @36db BW. And the treple unit is crossed at 3000Hz @ 48db LR. This "weird" combination of xo points/type and slopes, gives a near perfect measured frequency response around the xo points, even without any EQ or Dirac they sound pretty good. For some reason I can't cross the bass/mid at lower frequencies without getting a huge dip around the XO. But I'm very pleased with the upgrade. The midrange is more open and forward, there's more punch in the low mid/bass. More control in the bass at high spl. And the treple is more gentle to the ear, I guess because of lower distortion maybe. Link to comment
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