So, I thought I would post a brief write up of my latest build incase anyone was interested. I have based it around the ATC scm50, with a few little mods to the cabinet design. My idea was to try and aproximate an asymetrical cross section in the cabinet whilst not making the cabinet too hard to build. I did this by mounting panels internaly that would break up the cross section. This also doubled up as bracing for the cabinets. Hopefully this should become more obvious when looking at the pictures 
I also decided to make the baffle double skinned, with a layer of neoprene in between. The bass drive unit actually bolts the baffle to the cabinet, making a very sturdy connection and helping the baffle to stay nice and firm. The boxes are built out of 25mm thick mdf, and lined with bitumen. I did also line with some very high density "egg box" shaped rubbery foam, but seeing as the cabinet is only handling frquencies from 380Hz and below I am not sure that it really does too much. So far, I haven't ported them. ATC tune their ports to support the cone at its reasonance, but I am currently not using these in a room large enough to have to worry about that just yet. I am running them actively crossed over with a DBX crossover, and some 'off the shelf' amps, but I am also currently building some amplifiers and crossover for them, photos to follow. The midrange dome by ATC is a nominal 16ohm load, so I am designing an amplifier specifically to run at this impedence (off the shelf amps which can put enough power into 16 ohm to drive the mids, will be huge as pretty much all amps are also designed to run 8ohm loads).
As with all my builds, I am struggling to 'finish' them, ie paint them and get them looking half decent. I have never been one to care about aesthetics, and my ADHD means I just want to get them playing as soon as possible, so once the drivers are bolted in, its hard to bring myself to take them apart to paint or veneer! Fortunatly I have a very understanding girlfriend, who also knows that they are moving into my studio at some point soon, so she won't have to look at them in our bedroom much longer! For the record though, she loves music and she loves the sound they make, and by dating me, I am pretty sure she can't be that bothered by aesthetics either
Finally, I would like to take this oppertunity to say thank you to ATC who have been tremendously helpful throughout this build. They really are a fantastic bunch
*edit* having difficulties uploading, so here is a link to the facebook album
https://www.facebook.com/media/set/?set=a.10151631149500189.1073741827.504965188&type=1&l=2204274c07
I also decided to make the baffle double skinned, with a layer of neoprene in between. The bass drive unit actually bolts the baffle to the cabinet, making a very sturdy connection and helping the baffle to stay nice and firm. The boxes are built out of 25mm thick mdf, and lined with bitumen. I did also line with some very high density "egg box" shaped rubbery foam, but seeing as the cabinet is only handling frquencies from 380Hz and below I am not sure that it really does too much. So far, I haven't ported them. ATC tune their ports to support the cone at its reasonance, but I am currently not using these in a room large enough to have to worry about that just yet. I am running them actively crossed over with a DBX crossover, and some 'off the shelf' amps, but I am also currently building some amplifiers and crossover for them, photos to follow. The midrange dome by ATC is a nominal 16ohm load, so I am designing an amplifier specifically to run at this impedence (off the shelf amps which can put enough power into 16 ohm to drive the mids, will be huge as pretty much all amps are also designed to run 8ohm loads). As with all my builds, I am struggling to 'finish' them, ie paint them and get them looking half decent. I have never been one to care about aesthetics, and my ADHD means I just want to get them playing as soon as possible, so once the drivers are bolted in, its hard to bring myself to take them apart to paint or veneer! Fortunatly I have a very understanding girlfriend, who also knows that they are moving into my studio at some point soon, so she won't have to look at them in our bedroom much longer! For the record though, she loves music and she loves the sound they make, and by dating me, I am pretty sure she can't be that bothered by aesthetics either
Finally, I would like to take this oppertunity to say thank you to ATC who have been tremendously helpful throughout this build. They really are a fantastic bunch
*edit* having difficulties uploading, so here is a link to the facebook album
https://www.facebook.com/media/set/?set=a.10151631149500189.1073741827.504965188&type=1&l=2204274c07
Hi and thanks!
Sure - my goal with this system was dynamics and effortlessness, not sheer deafening volume.
Marco
They sound quite good. The weak spot now i think is likely the 40+ year old xo components.
dave
monster miniOnken for Tannoy 12" Gold. My design, Chris' execution.
dave
Those are beautiful looking cabinets Dave! You mentioned they sound quite good. But would you care to elaborate on their sonic pluses & minuses?
I'm listening to: Latin Color by Armi Grano
Thetubeguy1954 (Tom Scata)
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My system and DIY speakers
Anthem CD 1 tube CD player
Audio Research SP16 tube preamp has two preout
Audio Research D-115 tube amp powers Tweeters and Midrangs
Pass Threshold Stasis 2 Power amp powers woofers.
Marantz 6370Q turntable
All Casas cables
Big tower speakers 3.5 way design. ScanSpeaker tweeters and midrange , 2x12" Dynaudio woofers. Separate cabinet for xover. Weights 180 lb each, 5 feet tall.
My HT system is a totally different system that has 9 speakers (all 8" 3 ways) plus 4 of 12" passive subs. The receiver is Onkyo 818 and the sub amp is Mcintosh MC2105. PS3 and HTPC. TV is Toshiba 57" LCD cost me more than $6000 about 7 years ago, now less than 1000. I am thinking about a HD projector.
Anthem CD 1 tube CD player
Audio Research SP16 tube preamp has two preout
Audio Research D-115 tube amp powers Tweeters and Midrangs
Pass Threshold Stasis 2 Power amp powers woofers.
Marantz 6370Q turntable
All Casas cables
Big tower speakers 3.5 way design. ScanSpeaker tweeters and midrange , 2x12" Dynaudio woofers. Separate cabinet for xover. Weights 180 lb each, 5 feet tall.
My HT system is a totally different system that has 9 speakers (all 8" 3 ways) plus 4 of 12" passive subs. The receiver is Onkyo 818 and the sub amp is Mcintosh MC2105. PS3 and HTPC. TV is Toshiba 57" LCD cost me more than $6000 about 7 years ago, now less than 1000. I am thinking about a HD projector.
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10 liter bookshelf rough build
car mac audio 4 ohms midbass and unknown tweeters crossed at 3500hz 6db tweeters recently burned out on party but whatever here are pics...all built using household materials nothing pro like others here but sounded very good what was only point ... used bass box pro for design aid and t/s parameters measured not precisly but measured
car mac audio 4 ohms midbass and unknown tweeters crossed at 3500hz 6db tweeters recently burned out on party but whatever here are pics...all built using household materials
nothing pro like others here but sounded very good what was only point ... used bass box pro for design aid and t/s parameters measured not precisly but measuredAttachments
Attachments
Hello Hip!
First thanks for asking that question. I always love explaining the story about my "Boy". Second I'm sorry about my delay in responding, but better late than never, right? The photo is of "Briggs" my 80lb, Olde English Bulldogge! Please don't confuse him with the "English Bulldog" that the US Marines and Mississippi State use as their mascots. The original Olde English Bulldogges were extremely aggressive dogs ---{it's said, it took courage to even own an Olde English Bulldogge back when they were used to fight other animals}--- these dogs, who first got the name Bulldog in 1568, were originally specifically bred for just for the blood sport of fighting bulls & bears. The blood sports were quite popular pastimes with the masses that can be traced back to the year 1209.
However, this sport was eventually banned, but not forgotten, in 1835 in England. When the banning occurred some dog breeders took these Olde English Bulldogges and bred the extreme aggressiveness out of them, made their heads, larger & more round, pushed their noses back so far, it became difficult for these dogs to breathe normally and made their legs shorter. These became the "English Bulldog" everyone knows of today. That are also prone to many, health issues. Most people don't know the "English Bulldog" is such a mess, that often times it cannot even breed normally like other dogs do. There are many cases where a Bulldog and the litter have died from, during, or after a delivery, or during pregnancy from some sort of complication. Requiring that a C-Section be performed on the bitch.
Other breeders in England took these amazing Olde English Bulldogges and by breeding them with Old English Terriers ---{now believed to be extinct and which can be proved true here: Olde English White Terrier }--- produced a dog that combined the gameness of the terrier with the strength and athleticism of the bulldog and created the first "Pit Bull Terrier". Still other breeders in England bred Olde English Bulldogges, mastiffs, and terriers together to create the first "Staffordshire Bull Terrier". When these two breeds arrived in the United States, they became the direct ancestors of the American "Pit Bull Terrier". Later with some extra help of some Southern American breeders, they bred those dogs with Olde English Bulldogges and some mastiffs and created the original "Pit Bull" & through even further breeding the "American bulldogs"!
Hopefully this also helps explain to some why there are "Pit Bulls" and "Pit Bull Terriers" in America. They were actually two distinct breeds originally. However many crossbreeding's have occurred by unscrupulous breeders and unless a breeder can actually show you lineage back many generations. You won't know if you're actually purchasing a "Pit Bull", "Pit Bull Terrier" or a Hybrid and/or some other "Pit Bull types" of the two being passed off as one or the other....
This link: Olde English Bulldogge Breed History will provide you with a very interesting and accurate telling of the Olde English Bulldogges story that so few people really know about and without the existence of this breed, many other breeds known today could not have existed. I hope you enjoyed reading my long-winded explanation to your question. As much as I enjoyed sharing it with you Hip!
I'm listening to: River: The Joni Lettersby Herbie Hancock
Thetubeguy1954 (Tom Scata)
Hi all, there is my latest creation, made in Lithuania
midbass drivers SS revelators, tweeter also SS classic d2905/970000. Front panel thickness 36mm, rear panel 46mm, side walls made of plywood and HDF sandwitch - 22mm, outter walls 18mm HDF. inside used double partitions (one along the box, others across the box) weighs a lot
midbass drivers SS revelators, tweeter also SS classic d2905/970000. Front panel thickness 36mm, rear panel 46mm, side walls made of plywood and HDF sandwitch - 22mm, outter walls 18mm HDF. inside used double partitions (one along the box, others across the box) weighs a lot
That is very cool. I have just purchased a Boerboel (South African Mastiff) My wife has been looking at this dog for 6 years. I am myself just learning much about the breeding history of my new baby. I enjoyed your details.
Steve
