Hawking Memorial Obelisk - “My god, it’s full of stars” - nice!
So it looks that depth acceptability varies by design rather than strict measurement. How did you get away with the 140mm internal width of the Tysen 2?
So it looks that depth acceptability varies by design rather than strict measurement. How did you get away with the 140mm internal width of the Tysen 2?
It is a 3”. In a (relatively) long/large midTL.
140mm is the width, the TL reaches out the back, all of those examples have 4” drivers in shallow boxes. The 1 with issues are FR, the one that didn’t is a bit deeper and only used as a midTweeter.
dave
140mm is the width, the TL reaches out the back, all of those examples have 4” drivers in shallow boxes. The 1 with issues are FR, the one that didn’t is a bit deeper and only used as a midTweeter.
dave
Dave, out of curiosity, how well did that matte finish P-Lam on the Hawking Memorials hold up to the numerous moves the enclosures were probably subjected to before “decommissioning”? It was a bit of fun to trim the edges after removal of the plastic peel-coat.
Is there any particular place the push-push woofers should be placed on the side panels? I know in conventional designs centre to centre spacing can be critical, but as I‘m crossing below the baffle step frequency i understand the drivers are omnidirectional. Should the drivers still be placed a close to the Alpair 5.3 as its sub enclosure allows?
Depends on the box. Ideally as close to the midTweeter as possible, but sometimes you have things like Zd in a TL take precedence.
dave
dave
My pair of Apair 5.3 have arrived. They're tiny !!! I'm running them in on my desk just playing on random through my music collection. Every now and then I hear some detail of instrument texture sound or something in the layering of the track I've not noticed before. Can't with to get these going!
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So in anticipation of the build I'm looking at the rear chamber for the Altair 5.3.
There's the reducing chamber of the Tyson, but that appears to have an opening at the narrow end. Along with progressive stuffing I think this makes for an aperiodic design? Not sure of the specific benefits but I trust Dave, Chris et al. Maybe someone could explain it better for me as I've not dealt with this type of tuning on a high frequency driver?
I saw this as an alternative on a full range line array. What do you think?
There's the reducing chamber of the Tyson, but that appears to have an opening at the narrow end. Along with progressive stuffing I think this makes for an aperiodic design? Not sure of the specific benefits but I trust Dave, Chris et al. Maybe someone could explain it better for me as I've not dealt with this type of tuning on a high frequency driver?
I saw this as an alternative on a full range line array. What do you think?
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An aperiodic midTL. Low pressure, “sucks" the back wave down the line, flattens the impedance curve (good for passive XO), but won’t reach quite as low as say a sealed box.
picture looks like a weakly damped half-wave (closed) TL.
dave
Great info, thanks Dave. Would my 300-350hz crossover point for the 5.3 lend itself to this design? And does it need to be designed for the specific driver or is it more the general effect the design produces.
you’re a legend
you’re a legend
I think I'll have to play with crossover frequency with my minidsp before deciding. As you said before "The lower you take it, the less loud you can play." Other than that I guess its a system integration issue between bass and mid/high drivers.
I gently played a couple of test tones between 200-300hz and it wasn't as low as I thought!!
I gently played a couple of test tones between 200-300hz and it wasn't as low as I thought!!
So its nearing build time. I've looked at width of the cabinet for the bass and Alpair 5.3 as the mid/high.
The 5.3 is 35mm for the edges of the cabinet but what about distance from the top of the cabinet? I can't find much on placement from the top of the cabinet, only the sides. The Tyson V2 appears to have the driver place equidistant from the sides and top. Does it have any effect?
Oh and and should the top be rounded as well?
The 5.3 is 35mm for the edges of the cabinet but what about distance from the top of the cabinet? I can't find much on placement from the top of the cabinet, only the sides. The Tyson V2 appears to have the driver place equidistant from the sides and top. Does it have any effect?
Oh and and should the top be rounded as well?
It will only have a small effect. Goals are to minimize side reflections, but still maintain the smallest centre-to-centre with the woofers as practical.
Roundovers and chamfers do not hurt.
dave
Roundovers and chamfers do not hurt.
dave
Okey-dokey, I'm nearing the build build and so it's crossover time. Well thing time anyway.
I'm using my woofers in a sealed enclosure which I read gives a 12db/oct roll off naturally. As usual I have questions ;-)
1. Does the natural roll off of the cabinet override or preclude the use of a lesser slope crossover, for example 6db/oct? (I'd think it would but then again I'm not that bright.)
2. Would I be wisest to use a crossover of 12db to match the natural roll off? (I'd assume it'd give me access to the lowest bass the cabinet can produce)
Thanks in advance
I'm using my woofers in a sealed enclosure which I read gives a 12db/oct roll off naturally. As usual I have questions ;-)
1. Does the natural roll off of the cabinet override or preclude the use of a lesser slope crossover, for example 6db/oct? (I'd think it would but then again I'm not that bright.)
2. Would I be wisest to use a crossover of 12db to match the natural roll off? (I'd assume it'd give me access to the lowest bass the cabinet can produce)
Thanks in advance