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Ricci

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Ricci last won the day on December 13

Ricci had the most liked content!

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About Ricci

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    Super Bass Overlord

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  • Gender
    Male
  • Location
    Louisville, KY
  • Interests
    Bass...Subwoofers, audio, video, drums, recording, craft beer, performance arts, poetry...

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  1. Ricci

    Ricci's Skhorn Subwoofer & Files

    You know it's odd I spend all this time trying to keep this thing as compact as possible for being a double 21 and everyone seems to say I wish it were bigger! Never would have expected that.
  2. Ricci

    Ricci's Skhorn Subwoofer & Files

    It does improve the low end some with more size. Hoffmans law of course...It also gives more room to fit things like casters or handles. I haven't got a plan for a larger version but this is close to what Paul did with his. 24x32x54= 24cu ft or 680L external 27x36x60= 33.75cu ft or 956L external. That's more than a 40% increase in size. You may be underestimating just how big and heavy this larger cab would be.
  3. Ricci

    Ricci's Skhorn Subwoofer & Files

    I'm glad that you found it easy. I was hoping it would turn out not so hard. The hatches are likely the most difficult parts. I wanted to make it even simpler but didn't want to compromise in other areas too much.
  4. Ricci

    Ricci's Skhorn Subwoofer & Files

    You are the 1st person that I know of who has the 21NTLW5000's. They haven't shown up in the states yet. This is one driver I've been keeping my eye on. The back story on them and other potential drivers in development using what is essentially DD topology is interesting and may be getting more interesting in the future. At least that's what I've heard... I'll be looking forward to your impressions of the 551 vs the 451 also. I don't know of anyone with the 551's either. Next year I'll finally test the 21DS115's in the Skhorn and that will be followed by the 21NLW9601 and the 21ID's. I'll probably have a look at the Lavoce 21 too. Sadly all my audio related time lately is porting data over to the new DB site. Haven't had time for any new designs or investigations.
  5. Ricci

    Ricci's Skhorn Subwoofer & Files

    Jesal, I do not know what would happen running the 2 different drivers. I expect that there would be some degradation of the response shape and perhaps a lessening of the output capabilities. Even though the 2 drivers model very similarly this will be a much greater difference than production tolerances or series wiring of 2 of the "same" driver. It would probably "work" at moderate or lower volume levels. If you wanted to get deep into the rabbit hole with it this could be simulated in Akabak. If you have the drivers and measurement capability it would probably be quicker to try it carefully. Long term I definitely wouldn't recommend it. I would go with another 21SW115-4 out of those 3 options. Displacement is ultimately king.
  6. Ricci

    Ricci's Skhorn Subwoofer & Files

    The 21SW115-8 might be ok...It doesn't look so good once the generic LE is added to the sim. The response gets a bit "humpy". 40Hz and 110Hz with a dip in between. I don't have the complex LE components measured for that driver so it is hard to say how it would turn out exactly. It's an approximation otherwise. This is why I hesitated to recommend it. I just don't know for sure.
  7. Ricci

    Ricci's Skhorn Subwoofer & Files

    The 21SW152's should be good. There's at least one guy already using those. How do you like the PD drivers? Those are rare over here in the states.
  8. Ricci

    Ricci's Skhorn Subwoofer & Files

    I believe their TH412 and many other of their multi driver fullrange speakers are also. It is not uncommon. BC 21-IPAL 2ohm 21_004K-2.pdf
  9. Ricci

    Need Advice on passive subwoofer build.

    Well I would suggest starting with a Behringer NU3000DSP or NX3000DSP amp. That will probably eat up about half of your budget. This will power the subs and provides EQ and DSP to shape the sound. This is about the best budget buy in amplifiers for subs currently. Seems like you want loud bass for peanuts. It's a tall order. Look into Lilmike's Lilwrecker or Bill Fitzmaurices THT. These are big horns that use inexpensive drivers in large complex cabinets to put out a lot of sound for a low cost.
  10. Ricci

    Ricci's Skhorn Subwoofer & Files

    Hey Paul I understand sourcing the SP amps would be expensive but more so than the IPAL mods? Those are very expensive here. More than double the price without a heatsink or the dsp interface. There is a 2 ohm 21ipal. Its not on their website. Bennett has told me they will sell it if someone asks at least here in the states. I have the pdf. I only mention it because it would be easier on the amps than the 1ohm. I don't know of an amp that will be happy with the 1ohm drivers in parallel. I don't like running half bridge amps for bass either. 2 modules per cab seems very $$$$!!!
  11. Ricci

    Need Advice on passive subwoofer build.

    Provide a bit more information and it will be easier to suggest something. Budget? How big can the sub be? Do you have dimensions in mind? Can you do more than one sub? Are you in the US?
  12. Ricci

    Ricci's Skhorn Subwoofer & Files

    This is why I am also skeptical that this is an issue worth worrying about. Its not like running drivers in series in a cabinet is new. This is very common practice going way back. Any drivers and cabs will exhibit differences and drivers never behave exactly the same in any scenario. That is known. What is interesting here is whether series wiring amplifies the differences vs parallel wiring. It really shouldn't. Paul B&C does have a 2ohm variant of the 21ipal. It has less motor force but would be easier to run 2 off 1 amplifier. I'm not really that impressed with the power of the Ipal module. Have you thought about the Speakerpower 6000?
  13. Ricci

    Ricci's Skhorn Subwoofer & Files

    Ok. What were the driver specs used? Different for each driver I assume? That is a large difference in voltage. This would likely be caused by differences in the drivers performance rather than the wiring type unless there is a big difference in the amount or type of wire used between each driver. It makes me wonder how well matched the drivers are. If it isn't too much trouble flip the polarity or wiring on the drivers when you do this and see if it stays with a driver. Perhaps I'll investigate on mine next time I have a chance.
  14. Ricci

    Ricci's Skhorn Subwoofer & Files

    Paul, I've been busy. Why do you think the series connection is causing some sort of performance impact? Is it because of the info I posted about the Skhorn/ MAUL design process and uneven driver loading and excursion profile with the MAUL? In that case the word "series" had nothing to do with electrical wiring. The word "series" is in regards to the acoustic loading of the drivers. The drivers were physically in series acoustically inside of the horn/slot. This causes uneven cone loading not the electrical wiring. The Skhorn is symmetric so this does not apply. Series connection vs parallel connection of the woofers should not amount to anything significant unless the 2 drivers are way off spec from each other, in which case you will still see this with parallel wiring. Any objective quantification of it would have to be very strictly controlled as well. Same cab, same drivers, measurement equipment, same environment, same day, etc. If you have some of this I'd like to see it. Impedance curve taken back to back with the wiring resistance compensated would be ideal.
  15. Ricci

    Equipment for sale

    I appreciate the offer but no thanks. I need to sell drivers not acquire more!
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