Hello all,
Thank you for your responses, and your patience. Slow to come back as I promptly went on holiday for a few weeks after posting and work followed by illness has had me nailed down since my return. I have been wanting to come back to you all for weeks, please accept my apologies.
To answer your questions in turn;
I have thought about the MWM, although I am not sure they are any smaller than the Jube LF cabs in terms of size being one of my biggest issues. Long term I was anticipating building some of the Super variant i’ve seen to cover the sub range. Vertical polar coverage also an issue without stacking lots of them together I think.
I haven’t. A big element of this step is learning the metrics. How do I quantify ‘better sound’. How do I measure the system to provide feedback for set up and tuning, etc. It seems essential to learn these things. I see getting to grips with a DSP as just this, learning how to measure and respond.
- How far can I get with a handheld SPL meter or should I invest in a measurement mic and software? Or both?
I'd be interested to hear your thoughts if you would like Chris.
Eventually I see the system being installed in a more permanent location. So getting to grips with a dsp and eq seems sensible. Presuming a dsp will ultimately give better results.
Also struggling to find anything on the PRV 18x10 horn, can you direct me?
La Scalas with subs on their own won’t do it for me I feel. Pretty sure I want a lower horn sound form a two way system. Add mwms then maybe. But then we’re getting into a whole pile of speakers and I may as well build Jubes/mwms
@ClaudeJ1
Great. Yeah I think if Jube LF cabs are manageable with two people then that puts them in the lead.
To clarify the stacking, we are only using one khorn in each stack, the middle piece is just a spacer to raise the HF above head height. As you say, one Jubilee would not raise the midrange/Tweeter section high enough above dancers. So I would also need to design something similar to pick up a horn from a Jube LF - not ideal sound wise I’m sure. But possible in the same context I hope.
Yes I have settled on the Celestion Axi2050 as I can get them at an okay price and I feel they are good enough for my purposes. Regarding the horns, I had already considered the Celestion options although found out they decided not to manufacture them in the end. Subsequently I have managed to track four of them down and they are now a serious contender.
Regarding sub 70hz, until such a time as I can add passive horn loaded subs into the system I would most like use the existing khorn false corners where possible and two active subs.
Interesting! Could build them out of 12mm whether two drivers or three I suppose. Although there would be more resonance?
Even more interesting! If I had the storage this could be the way. Ultimately I was thinking a super mwm or two on the bottom would be a good addition!
Not sure if you mean like the underground Jube or Like a Khorn with false corners? In some ways more parts are more of a pain. It all has to be stored somewhere
Understood completely. I am grateful for the input you have offered already Claude, thank you.
I am not expecting explicit advice on exactly what to do that will give perfect results. This is very much all a part of my audio journey, the next step on from the system I use currently in the quest for better sound. It’s all learning and asking questions on ideas to gain a better understanding. I appreciated I am leaning on some professional help and experience in the process and would not wish to put anyone out.
This is a good idea - although from what I understand splitting into 2 12” units will effect the low end response?
*****
So this is where i'm at;
Options?
Bass horns;
1. Jubilee clones
- A friend has imported a jubilee LF horn and reverse engineered it, so we will have plans to build those. Which seems promising.
2. MWMs
- Sounds like the no nonsense approach - build a bunch of these, stack em up.
- Downsides are space and amping. I would need a lot of space to store 16 mwms. Running 4 in series possible on one 16ohm amp I suppose.
- Does anyone have plans they would like to share? Still hard to gauge the full size of an mwms
Treble horns;
1. Celestion horns
- Can get hold of them, although not cheap. Unsure how they compare with the K402. Is it worth the extra effort to build a k402?
2. K402 replica
- Bit of an unknown, have the skills between us to build one but no plans at current.
3. K402 import
- Not viable, can’t get hold of 402 horns via Klipsch dealer and too expensive to import.
Questions
Celestion horns + drivers
The strongest idea at the moment is to build some Jube LF clones and match them with Celestion AXI2050 drivers and LR9045H horns.
Celestion decided not to manufacture the horns in the end but I have managed to track four of them down.
So I have some new question about the compatibility of Celestion’s horns with Jube LF’s and also comparisons with the K-402.
From what I understand it is quite important to match polar coverage between the LF and HF. There is limited information from Celestion but I do have horizontal and vertical polar maps. Reading what I can from these they seem to break up around 550hz at -6db, in comparison I read the K-402 goes to ~300hz at -6db. So I’d be loosing out between ~650hz and 350hz is paired with a Jube LF horn. They also have different dispersion angles (see information screenshots attached).
There is also two Celestion horns to choose from. The 9045 and the 6040. I feel the wider horn is the right choice for my application, unless the narrower horns is going to be a better match…
Questions are;
- Which Celestion horn would be best suited to my situation?
- Can anyone offer 2 cents on the statistical differences between these Celestion horns and the K-402?
- Will they be compatible enough with the Jube LF?
- Is it a good idea?
I will endeavour to be more on it with the communication from here on! Many thanks again for your interest and opinion on my project.
Josh
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