Just got a sale flyer from MCM today.
They have this 5" fullranger on sale. Would it be worth a shot?
5 Inch 20W 8 Ohm Full Range Dual Cone Speaker | XF-131-828 (XF131828) | Distributed By MCM
I found the PDF sheet with the specs.
http://www.hellsound.de/contents/de/XF-131-828.pdf
For the price I think can experiment with enclosures and place them in the boys room.
They have this 5" fullranger on sale. Would it be worth a shot?
5 Inch 20W 8 Ohm Full Range Dual Cone Speaker | XF-131-828 (XF131828) | Distributed By MCM
I found the PDF sheet with the specs.
http://www.hellsound.de/contents/de/XF-131-828.pdf
For the price I think can experiment with enclosures and place them in the boys room.
Ryan,
I have seen this before and it looks interesting but did not know what the T/S params were. The pdf sheet is very different than what is posted on MCM website. Seems like quite the bargain though. I will put it in some sims with a MLTL and see how it fares. 90 Hz fs, 5 liter Vas, 89 dB efficiency, with Qts of 0.6 seem like nice numbers for a good all around driver.
I have seen this before and it looks interesting but did not know what the T/S params were. The pdf sheet is very different than what is posted on MCM website. Seems like quite the bargain though. I will put it in some sims with a MLTL and see how it fares. 90 Hz fs, 5 liter Vas, 89 dB efficiency, with Qts of 0.6 seem like nice numbers for a good all around driver.
Thanks X,
The 11 year old, has been watching me build all these enclosures, and wants to build a set for his room. It would be a fun project to do together. Granted they don't have to be Audiophile quality for his room, but the better they sound the more excited I will be. haha.
The 11 year old, has been watching me build all these enclosures, and wants to build a set for his room. It would be a fun project to do together. Granted they don't have to be Audiophile quality for his room, but the better they sound the more excited I will be. haha.
Ryan,
I think this design may be something you can try with your son. It isn't a bad driver, but may need some augmentation with a tweeter - try without first and see how you like it.
Bipole MLTL with HKM XF-131-828: 7 in wide x 13 in deep x 42 in tall, driver at 10.5 in from top, down firing vent is 4 in x 4 in (or equiv CSA) x 2.5 in long, set vent exit at 3.5 in above floor with legs, stuffing in top 2/3rds of line as usual.
I think this design may be something you can try with your son. It isn't a bad driver, but may need some augmentation with a tweeter - try without first and see how you like it.
Bipole MLTL with HKM XF-131-828: 7 in wide x 13 in deep x 42 in tall, driver at 10.5 in from top, down firing vent is 4 in x 4 in (or equiv CSA) x 2.5 in long, set vent exit at 3.5 in above floor with legs, stuffing in top 2/3rds of line as usual.
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Very cool. Thanks again X. Can I fold it 3 times so it would be 3- 14" paths. Stuffing 2 of the paths and putting the vent at the end of the last path? Can't draw up what i'm thinking but I can later.
He even saw some PVC tube enclosures that he liked. I got a 6" pvc heater at work so I could bend it into any shape. Curly Q so to speak. I'm thinking like a 11 year old now!!! Way outside the box
He even saw some PVC tube enclosures that he liked. I got a 6" pvc heater at work so I could bend it into any shape. Curly Q so to speak. I'm thinking like a 11 year old now!!! Way outside the box
If you fold then it won't be a tower which is needed for bipole. You can do it with single driver: cut depth to 6.5 in and reduce vent csa to 8 square inches. May need bsc correction, but your son probably won't notice 🙂
re the pipe bending- great idea! I have a load of PVC thick wall water pipe i would love to use, and until now i was going to joint it and settle for a 'Z' shape. I seem to amass 2" fullranges, i must have 5 types now...
X i was only going with one driver per enclosure. Nothing too fancy. I could use 1/4 wave calc with the pvc pipe. Cut to length and then throw it in the heater and bend it into a shape that meets the boy's approval. Port the end and have him throw some paint of his choice on it.
M cutting it into a Z shape with 45 degree cuts would be cool too. I have access to a plastic fusion tool that would work amazing on the joints. No glue needed. 500 degrees works wonders on pvc. haha
M cutting it into a Z shape with 45 degree cuts would be cool too. I have access to a plastic fusion tool that would work amazing on the joints. No glue needed. 500 degrees works wonders on pvc. haha
HAHA! I need one! I'm still aching to make some cheesey treble-clef shaped pipes for some fullranges I have. Casting them just seems too much like hard work.
Treble clef pipes would be cool. Very doable with 2" ID schedule 40 for sure. Maybe a 4" to 2" adapter on the end to fit larger drivers. How about a Bass clef pipe for a sub.......?
If you heat the pvc you can do nice gradual taper (slowly flatten it to decrease csa) TL that will sound much nicer than a straight pipe. I do this with pvc flutes on the mouthpiece end to get a parabolic profile.
I found a couple5 1/4 drivers out of some old KLH book shelf speakers that the boy and I will experiment with. Got some scrap pipe from work today, let the fun begin!!!
rocket speakers
Well the boy and I have been having some fun in the garage. Mad scientist style!
What we have at this point is a 1/4 wave TL 66" overall for a tuning of roughly 50hz. The speaker is placed at 22" and the line is stuffed up to 44" with the last 22" open.
It sounds pretty good for what we are working with. The next step is to place 4" to 2" reducer at the 44" mark (where the stuffing ends) and finish the length with 2". Then we can cut the 2" to taste for tuning so to speak. MLTL-esque
In the end will come up with approx 6' tall rockets with fins for stands. Even if they don't sound the greatest the boy and i had fun building them and he will be proud to show them off to his friends.
Well the boy and I have been having some fun in the garage. Mad scientist style!
What we have at this point is a 1/4 wave TL 66" overall for a tuning of roughly 50hz. The speaker is placed at 22" and the line is stuffed up to 44" with the last 22" open.
It sounds pretty good for what we are working with. The next step is to place 4" to 2" reducer at the 44" mark (where the stuffing ends) and finish the length with 2". Then we can cut the 2" to taste for tuning so to speak. MLTL-esque
In the end will come up with approx 6' tall rockets with fins for stands. Even if they don't sound the greatest the boy and i had fun building them and he will be proud to show them off to his friends.
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cool! Some of the best things are created in those Dr Frankenstein moments! The rocket idea is inspired.
Nice job Ryan! I think you want to put reducer at long end not at 44 in o have it behave like a long mltl. You will get 40 Hz this way. 44 in will get closer to 50 Hz and keep it compact though. No heating and pretzeling?
Yes we are the mad scientists. I wish had some hair like Gene Wilder just for effect!
Thanks X, I will experiment with the reducer. We have plenty of old pipe to play with. I asked him what he wanted for shapes and he said rockets so.... rockets it is. He's the lead designer on the project and I'm just the silent partner. haha
Thanks X, I will experiment with the reducer. We have plenty of old pipe to play with. I asked him what he wanted for shapes and he said rockets so.... rockets it is. He's the lead designer on the project and I'm just the silent partner. haha
Well they're up and running.
The pipe on the left is 66" to the reducer and then has a 12" piece of 2" on top. It is only stuffed to 44"
The pipe on the left is 66" also with no pipe on the reducer but is stuffed completely to top.
The fully stuffed one sounds a bit punchier with just a bit less extension. I don't have anymore 2" or I would have tried an even longer piece on top. I'll have to wait and grab some more scrap from work on monday.
Pretty fun project so far.
The pipe on the left is 66" to the reducer and then has a 12" piece of 2" on top. It is only stuffed to 44"
The pipe on the left is 66" also with no pipe on the reducer but is stuffed completely to top.
The fully stuffed one sounds a bit punchier with just a bit less extension. I don't have anymore 2" or I would have tried an even longer piece on top. I'll have to wait and grab some more scrap from work on monday.
Pretty fun project so far.
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