Originally Posted by Craig S King
Bryce, remember both the UM18 and the dual VBSS's will be for a music setup in my office. With that in mind, do you still think I need a 6k amp? I'm kind of leaning towards doing a 3k.
Originally Posted by dan.john303
I am interested in how you plan on integrating the two subs. Are you going to run the VBSS and the Marty at the same time? Are you going to high pass the vbss at 31Hz and let the Marty handle 31-17Hz?
I have seen vets on this sub warn newbies about mixing differently tuned ported subs, but I'm not solid on the theory behind that idea. I really like the idea of a two-way sub to combine the midbass bang-for-the buck of the vbss design and the full Marty for it's ulf-bang for the buck. Especially if I could design a Marty variant tuned even lower...
Keep up the great work!
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I don't know enough about the amps honestly to tell you if you will need the 6k dsp. I am just assuming so from reading in the Marty thread... If you go inuke 3000dsp, it was recommended to bridge it to run the UM. My other main concern is that the PA460s are very efficient. They would run fine off of 1 of the inuke3000dsp channels. You could get all the volume out of them you needed, but I don't know if you could level match the UM to them very well because it will be much less sensitive and need more power for the same playing level. (maybe you can, I'm just saying in my opinion, this is a possible concern.)
I have the UM 18 on a 6000dsp and my two VBSS on a 3000dsp. I have to run the gain a decent amount higher on the 6000 dsp to get similar output to the VBSS's on the 3000dsp. Keep in mind, I do have an fv25hp running with the full marty. If I didn't have the FV25hp, I would have to run the Marty even hotter (they are both co located in a corner and I'm getting +6dB). If you are using the 3000dsp, unbridged with the UM 18 already and are happy, then maybe you will be fine.
*edit. I was thinking and part of the reason i have to run the 6000dsp hotter is that my pa460s are very near field. I think the points above are still valid, but the vbss being nearfield definitely effects the lack of gain i have to use to get the same output as the marty.
As John mentioned, I am running exactly how he said. I have the dual VBSS's handling 31 Hz up to about 90Hz where I crossover to my speakers. The Marty and FV25hp are running from roughly 15Hz to 30Hz. They have integrated very well. The only graphs I could find that I saved were compression graphs of the full setup. This will show you what they are capable in 7000 ft^3.
I also showed the FR I'm getting with dual VBSS and then with the Marty. I used a minidsp 2x4 HD to level the peaks of the VBSS's. The red line is before correction (VBSS only), and the Orange is after correction (VBSS only). The purple shows the marty by itself. I couldn't find the FR for the marty + the FV25hp together, but its very similar and +6dB. The compression chart will show you the FR of all four playing at the same time.
Not sure if I answered any questions, but hopefully it will help.