My visaton TQW tube speaker eventually started!!!

[mondogenerator]

FIrstly, id like to thank PKITT and all the others that have helped me out with my little questions, whether the were stupid, or informed questions: and also to those that offerred critique, (even if i still ended up ignoring it), and also to the guy who did the excel sheet of MJK's alignment tables, and made my calculator work unneeded, and as a result, more designs to be considered. If not for him (and MJK) i would be more than likely STILL: designing, or possibly just building another SBB4 box. Instead im taking a voyage into new territory, QW land....

This have proved a challenge as although i am fairly competant at wood work, i am no master craftsman, and have only built cuboid boxes before. For this project i was to delve into non parallel (or less parallel) domain. so i chickened out, for want of a near perfect result, and not another botched cabinet! The plans are all done and just been sent to the CNC man, i just have the waiting and gluing, finishing before i can tune them and get used to the first finished speaker ive had in about 10 years. YES the others are about 10 years old, a first project, and STILL have wires hanging out of driver holes......

So here is a mock up pic of what the finished article should look like roughly to scale.



in case anyone is interested, the drivers are Visaton AL130 8, and g20sc tweeter. 2nd order elec/3rd acoustic HP, and 2nd order LP.

comments both good and bad welcomed

[planet10]

Nice. Reminds me of Steven Brown's 40-1354 straight tapered TLs (from back in the hey-day of the FUll Range Forum). They turned out really well... hope yours do to.

dave

[mondogenerator]

i cant say ive seen the fullrangers youre talking about, would be interested in seeing them though so i may have to search them and see what turns up!

and yes foolishly i thought they were different to may of the 'conventional' looking folded TQWP designs i had seen, but with so many people out there with ideas im not surprised i didnt think of it first IAH...i was trying to avoid emulating others designs but your praise of those designs makes it an easier cross to bear. haha. never theless, the aim was to eliminate a fold and any possible sectional resonances that this may introduce...modelled F3 is around 40Hz, and the taper ratio is 20:1, if memory serves me correctly(so many sims), pkitt did a few options for me on the MJK models since i dont have them, and didnt want to overdesign, what is a 1st QW project for me.

either way i expect it to be more natural sounding than the SBB4 i had planned previously......

pics as soon as i have the parts back from CNC man.

Thanks again for the input.

[planet10]

You'd have to go digging into the Full RangeForum archives to getany info, and the pictures attheends ofthe links are likely long gone.

dave

[pkitt]

I really like the look of your cabinet!
Paul

Originally Posted by mondogenerator

FIrstly, id like to thank PKITT and all the others that have helped me out with my little questions, whether the were stupid, or informed questions: and also to those that offerred critique, (even if i still ended up ignoring it), and also to the guy who did the excel sheet of MJK's alignment tables, and made my calculator work unneeded, and as a result, more designs to be considered. If not for him (and MJK) i would be more than likely STILL: designing, or possibly just building another SBB4 box. Instead im taking a voyage into new territory, QW land....

This have proved a challenge as although i am fairly competant at wood work, i am no master craftsman, and have only built cuboid boxes before. For this project i was to delve into non parallel (or less parallel) domain. so i chickened out, for want of a near perfect result, and not another botched cabinet! The plans are all done and just been sent to the CNC man, i just have the waiting and gluing, finishing before i can tune them and get used to the first finished speaker ive had in about 10 years. YES the others are about 10 years old, a first project, and STILL have wires hanging out of driver holes......

So here is a mock up pic of what the finished article should look like roughly to scale.



in case anyone is interested, the drivers are Visaton AL130 8, and g20sc tweeter. 2nd order elec/3rd acoustic HP, and 2nd order LP.

comments both good and bad welcomed

[mondogenerator]

Originally Posted by pkitt

I really like the look of your cabinet!
Paul

thanks! im pretty chuffed with the look of them now that theyre drawn out to scale too...its the sound ill be dying to hear though!

[h@kan]

Very nice design!

Is the hole on front the terminus or is it a mass loaded design with a port?

Kinda reminds me of my 10:1 TL's. They are for wall mounting so no base plates are needed.

Wish you all luck with the building!

Regards H@kan

(attaching a image of my 10:1 TL's)

[mondogenerator]

Originally Posted by h@kan

Is the hole on front the terminus or is it a mass loaded design with a port?

yes it looks similar to your wall mounted design. The hole in the front is just the terminus, its a simple 20:1 tapered QW tube, not a MLTL design. I considered a slot for the terminus but the 'convential' looking port 'hole' seemed easier to me to implement, so i chose to do that instead.

[mondogenerator]

ive just finished the simulation of the design, using Boxsim. I modelled the baffle size and effect on response, and crossover mods to the overall FR. As there is no TL option, or that i know of(such is the level of my german reading), i substituted a BR box instead. In this way the FR below about 100hz isnt accurate, and the FR as a whole is still going to be subject to room modes, which boxsim doesnt calculate. All in all, im pretty satisfied with the predicted results.

[chris661]

I know you've already started on this project, but for future ones...

BoxSim

I've been contemplating messing around with the al130 for a while, but when you're a teenager, such drivers are considered expensive.

Hope all goes well.
Chris