JTS pre-amp x-over points
Printed From: Speakerplans.com
Category: Other Chat
Forum Name: Roots n Culture Forum
Forum Description: Talk about speaker box with other sounds here
URL: https://forum.speakerplans.com/forum_posts.asp?TID=5148
Printed Date: 27 March 2026 at 12:52am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: JTS pre-amp x-over points
Posted By: Beez
Subject: JTS pre-amp x-over points
Date Posted: 21 May 2006 at 7:04am
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anyone see this on ebay.. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7415029183&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1 - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=74150 29183&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1 interested to know why tubbys left gaps in the crossover points. check questions & answers.. |
Replies:
Posted By: mskeete
Date Posted: 21 May 2006 at 8:00pm
| Some of that spec looks made up. e.g. the frequencies of the graphic ( only 7 bands) looks closer to an elvins unit |
Posted By: vibesmaster
Date Posted: 22 May 2006 at 9:40am
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exactly, that guy had an elvins for sale last week along with this old time tubbys one they both had the same description ? does he actually know or what? a funny thing is it didnt sell first time round for £300 the he relisted exactly the same description then gets £420? crazy , what a crap case its in looks like an old biscuit tin to me |
mskeete wrote:Posted By: mans1000
Date Posted: 22 May 2006 at 10:09am
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was very tempted to bid on that Elvin's pre.Deciced last minute not to. ------------- "The earth provides enough to satisfy every mans needs...but not every mans greed." |
Posted By: vibesmaster
Date Posted: 22 May 2006 at 12:20pm
i heard from a very reliable source that they are not really set out properly , the elvins pre that is , he didnt rate it at all 
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Posted By: novice
Date Posted: 22 May 2006 at 1:17pm
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a reply to same thread on bloodandfire.. "those frequencies are probably the -3 dB points of the crossover filters, which is the common way to specify the cut-off frequency of a filter. Obviously, when you design the crossover filters for a multiband preamp, you want the frequency response to be flat when all filters are active. Since any analog filter does not cut off instantly but with a certain slope, the responses of neighboring filters will overlap within a certain frequency range. You want to design the shapes of the filter frequency responses such that in these overlapping regions, the total response of both filters sums to 0 dB. When neighboring filters would have their -3 dB points at the same frequency (so with no "gap"), the total response would actually be + 3 dB at that frequency. Instead, what you want is that at the cut-off (-3 dB) frequency of one filter, the response of the other is at -10 dB, so that the sum is 0 dB. So the numbers that are given in the description make perfect sense and there is no "gap" in the response." mskeete do you do the same?? |
Posted By: RENSAAB
Date Posted: 23 May 2006 at 2:58am
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There are variables in active crossover design which can dramatically affect sound system performance other than "crossover points" eg: "roll-off slope", "Q" or even crossover type (butterworth, bessel etc). IMPO active crossovers are the heart of any good sound system but too often overlooked. Mskeete would you agree? Fellow sound engineer |
Posted By: mskeete
Date Posted: 23 May 2006 at 6:21am
Hell no
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Posted By: mskeete
Date Posted: 23 May 2006 at 6:22am
Completely agree. All crossovers are not the same so you just can't look at crossover points |
Posted By: mark
Date Posted: 20 December 2008 at 12:15am
| u take a listen to tubbys and every1 dat uses tubbys pre amp all soundthesame there is really no definition in his sound check his bass the notes he plays ars the same on every tune and also his 30hz on his pre amp is lazy and u cant often even hear it. Shame on tubbys. but i must give him respect for his mids high and treble it is very clean and his mic to. |
Posted By: King Simeon
Date Posted: 20 December 2008 at 4:14am
 No need to make a proper reply to that one!! The internet.... everyones a critic... fair play. ------------- https://www.facebook.com/KingSimeonSound?ref=stream https://soundcloud.com/king-simeon |
Posted By: Tekasis
Date Posted: 21 December 2008 at 3:52pm
Lazy bass ? can you explain a bit more what you're trying to say ? As I took a listen to JTS at UOD along side Iration & Aba Shanti-I & didn't hear no lazy bass! Mid-tops clean as you mentioned & the bass shook up the place.
Overall sounded be best in all frequency departments!
------------- **Heavy Weight-Line** A home without books is like a body with no soul. |
Posted By: King Simeon
Date Posted: 21 December 2008 at 4:56pm
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...Mmmm
It is very easy to be a critic from a far. You're welcome to say what you want, but calling Tubbys lazy...?!?!?
 No definition....?!??!? Well personal taste is fair enough, but say it like so. It not just the operator and pre, the music/tune played determines how the tune 'sounds' on the set, soundman has to tune up best he can, but as they say... you can't polish a turd!!
 !! Not many tunes are mastered and from pro studios, dubplate thing is a vibes thing, as long as the tune has vibes... Gwaan selecta!!......30htz is pretty in-audiable and is not very efficient to run through amps... each to there own... many love the deeper sounds. Everyone play like they wanna play... Anyone who want to judge a sound... study up and share the knowledge... ADD to the subject. ------------- https://www.facebook.com/KingSimeonSound?ref=stream https://soundcloud.com/king-simeon |
Posted By: silworm
Date Posted: 22 December 2008 at 11:25am
This has got to be one of the funniest yet very explicit english expression |
Posted By: mark
Date Posted: 23 December 2008 at 2:26am
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I have to laugh go get a tubbys pre amp and tell me if the 30 hz works and if u want proof ask word sound and power if his 30 hz worked and who fixed it ! some of u people hear some where shaking and think dats bass!!!
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Posted By: King Simeon
Date Posted: 23 December 2008 at 11:14am
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If a TV only has 50 channels, it would be pointless complaining you can't find ch.51 Most of Tubbys bass amps have a filter option at 30htz.... bit of a clue in that. It's fine to play like you wanna play, WSP had his pre modified, not fixed.Thats is why most Tubbys pre's are not the same... a lot of folks get them personallised by Tubbys, have it modified to their tastes.... so all the talk of them all sounding the same...??!?!? It would be most people playing the the same... and also with much of the music played being similar...in a roots sound tradition, why would/should it sound radically different...?
People should just step forward and do what they do... Mark... come rattle us up with your deep tone... you have a sound.... a name we should look out for?? ------------- https://www.facebook.com/KingSimeonSound?ref=stream https://soundcloud.com/king-simeon |
Posted By: Nwo Sound System
Date Posted: 23 December 2008 at 2:05pm
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Jah tubbys has a dangerous bass, next time hes playing at se1-just make the trip and stand next to one his stacks, witness the bass for yourself. That's the first ive heard about the lazy bass ting. |
Posted By: tweeter box
Date Posted: 23 December 2008 at 3:04pm
+1 ------------- PRECISION SOUND SYSTEM. Feeding the peoples needs for Roots Music. Strictly premium grade reggae and dub steppers from the early 70's to present day. |
Posted By: mark
Date Posted: 24 December 2008 at 2:14am
| i never said his bass was lazy but anyways i dont have nothing to prove like i said u people hear boof boof and think dats it u lot are jokers and yes i have been infront of his stacks and yeah all u can feel is wind no real pressure hurting ur chesting any1 can make a speaker move. Too much people on here think they no bout sounds and they dont know nothing like i said dont worry my sound is the newest sound ontheblock listen out 4 me and i promise u i will shake up tubbys further more alot of people can!!!! lol |
Posted By: king david
Date Posted: 24 December 2008 at 10:32am
even if u are right on the "technical side", when u write down sentences like this its u who looks like a joker!
my sound is the best, tubbys bass is boof boof, people here dont know nothing....come on mark, relax a bit!
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Posted By: King Simeon
Date Posted: 24 December 2008 at 11:20am
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Gw'aaan Mark..!!!
No name for your sound yet...? I figure you might be an East Ender!!! a friend of Stuarts...?
No sense talking much more about it... you are going to have to deliver!!! You're gonna have to have some music too.... I look forward to seeing you out there.
The only sound that i have ever witnessed like you're saying about bass, and many a sound man also agrees, is K Earthquake when he came on the scene. But he doesn't use the same set up now, and i think even he will tell you.... music is more a key now! So.....
Step forward... Still waiting on a name....
------------- https://www.facebook.com/KingSimeonSound?ref=stream https://soundcloud.com/king-simeon |
Posted By: Joseph Redhemption
Date Posted: 24 December 2008 at 6:22pm
Yo Mark the tuffest, Xover points have nothing to do with what you call pressure. It has to do with dynamics/attack and the preamp is really not the weakest link in the chain. It has much more to do (if not all in the frequencies from 10 to 200Hz) with the amp, speaker and cab conception. As King David sayed RELAX xpecialy when you dont know the technical side of your sound. Raspect anyway. And what about your sound name? |
Posted By: mark
Date Posted: 25 December 2008 at 2:00am
| yes king simeon dont worry you'll know when im coming and i will let u know when i have some dances coming up nuff respect!! |
Posted By: mark
Date Posted: 25 December 2008 at 2:03am
| in tubbys case the preamp is the weakest link cause u think about it sometimes he aint dropping like irration and they were using the same amps. but anyways no disrespect to tubbys still but i just think as a builder he should have a better bassline than wat he has.respect joseph! |
Posted By: mark
Date Posted: 25 December 2008 at 2:05am
| so who u guys think istheheaviest sound out there right now??? |
Posted By: Calculus
Date Posted: 25 December 2008 at 2:10am
| comeon your dissing mans set and not sayin like you can/have anything better to offer. |
Posted By: mark
Date Posted: 25 December 2008 at 2:26am
| wats wrong wid u im not dissing his set as i said he has the cleanest mids and tops but i thinkn he could improve his bass. and further more i aint got nothing to prove to wheres ur set? |
Posted By: Calculus
Date Posted: 26 December 2008 at 12:23am
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ooh touchy. in the lock up/workshop. You could check it out with a bit of research. but I don't see the relevance of the location of my sound. all i'm saying if you can do better... how exactly are you going to do it? and do irration not use a tubby pre aswell last time i checked they do. All i'm saying is if you think people on here "don't know nothing bout sound"... then please teach us where we've all gone so wrong. |
Posted By: King Simeon
Date Posted: 26 December 2008 at 10:48am
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Mark uses a Links pre-amp and mainly Void amps....
Everyone should come with what they have with sound... It might not sound 'fashionable' but i don't mind all that much being a smaller sound than others... If anyone remembers Iration in the earlys, he was ruffed up on lower bass many times... Aba would rumble him, but when it came to playing... Mark came mostly with music no one else could and vibes.
Personally, i'm listening out for the music played. Someone shouting rarely has anything interesting to say, empty vessels.... so i'm listening out for a bit more...
It's Christmas! come one and all, bring your sounds, carrying on building your sounds, build up some tune and step confidently into the new year!!!
------------- https://www.facebook.com/KingSimeonSound?ref=stream https://soundcloud.com/king-simeon |
Posted By: True Talk
Date Posted: 26 December 2008 at 12:19pm
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Am I to Understand there are some on here who think Irration is heavier than Tubby's? a lot would depends on what you call heavy; are we talking loudness or are we talking frequency, it makes me laugh when I read some of the blobs on this forum, anyone would think some of you guys have been in the sound business for years, but most of you are in the leaning curve and talk like you've been around sound systems or even sound people for many a years and it's properly only been 5 years at the most, hats off to people like Pre Amp Mark and those who understand the basis of sound, but everything you read and learn in a book dose not always pan out when it comes to playing a sound, I studied at collage sound engineering many moons ago so trust me I know, I've listen to many a sounds and a true bass sound is frequency and not power a clean round bass Tubby's has that more than I can say for any sound out there, I heard Quaker the other day with Tubby's and his bass note were good but not as smooth as Tubby's I mention Notes, next time you listen to a sound listen for the change in notes the different frequencies there boxes play, most out there are just one note sound systems with power, and a lot of you guys out there think power is where it's at, in the early days it was not about power but good music and the right frequency you could get out of those 100 watt speakers, you could be in a session and still have a conversation with a bredrin music pumping, now you go to a session and you come out with your ears ringing which is not good for your persons. I am sure some of the Modern sound these days that is the operator/pre-amp controller are deaf could name a few but then some one will say I am dissing the sounds which is something I would not do regardless of what I think, sound system is a expensive pass time and I suppose like people they are all different. |
Posted By: tweeter box
Date Posted: 26 December 2008 at 12:39pm
could it possibly be the difference in bass freq in the tunes?  not every tune drop the same bass/pressure------------- PRECISION SOUND SYSTEM. Feeding the peoples needs for Roots Music. Strictly premium grade reggae and dub steppers from the early 70's to present day. |
Posted By: BigSoundNorthWest
Date Posted: 30 March 2021 at 10:50am
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Posted By: Noyzmunky
Date Posted: 30 March 2021 at 5:50pm
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Dude, this thread is 13 years old! and you feel the need to point out a minor contradiction? Are you getting out enough? ------------- my name is Inigo Montoya...you killed my father, prepare to die!. |
Posted By: BigSoundNorthWest
Date Posted: 30 March 2021 at 7:25pm
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and.... you replied???? i was searching from Google and landed on the site. was reading the important bit, ie, the words and info, not the date...... Who gives a toss how old it is. lol |
Posted By: Noyzmunky
Date Posted: 31 March 2021 at 5:16pm
 Amazing skills there. I can see you're a danger to ....probably just yourself.  ------------- my name is Inigo Montoya...you killed my father, prepare to die!. |