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Has anyone heard an all valve rig e.g. Axis, S&P?

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flinnt45 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote flinnt45 Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 7:31pm
Hi Roman

I did something similar in the late 90,s built 4 x cubes when stacked together gave the same performance as a quad, just more portable they were 800 x 800 x 800 were tuned for 35 hz, used the EVX180b, real heavy run off a 500 watt tube amp, was not powerfull enough tho, and the amp was vintage circa 1967 built by a Jamaican from Spanish town name Jakie. used TT21 in the output.
JAH Kreator Hi Fi
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roman Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 7:48pm
Originally posted by valve head777 valve head777 wrote:


You do your thing mate, I'm an unapologetic traditionalist. For me Soundsystem has quite tight boudries.
No worries. Good luck to you.
Can you specify the tight boundaries you speak of?
I hope we are allowed to get together and dance to good sound and music.
It should be quite purist when I play studio one and treasure isle 45's through an all analogue, valve amplified, quad bass reflex and multi cell horn sound system.

Freedom of choice, choice of freedom.

Give thanks for life.


Edited by Roman - 26 February 2018 at 7:51pm
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flinnt45 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote flinnt45 Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 8:03pm
Well Roman

We both seek audio Nirvana for our own reasons special to us both, my aim is to demonstrate that vacuum state will blow solid state into the weeds for both sound quality and power, drag it into the forefront of sound system audio where it belongs, fairly portable the only amp which wont be a one man carry will be the sub amp, it will be old school suitcase size, but instead of being 600 watts will be 2,5 Kw
upper bass 1200 watts
mid 600 watts
and maybe An otl for the treble, must be 6c33cb tho you can tune the treble response by altering the value of the grid resistors
jbl 2404 and jbl 2426j for tops 12 db
jbl 2482 mids 300hz to 5khz 12 db
Gauss 4582 upper bass 90 hz to 300 hz 12 db
18 sound 21,s for sub in front loaded folding horns F3 29hz 24 db
JAH Kreator Hi Fi
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 8:08pm
Mixers don't do it for you. Your assertion is that for serious lows you need a reggae pre amp like a JTS.

absoulty note..as i said imho....

Soory man lol , my talk lol

I'm not sure I do. Your grammar and spelling is unusual.
Something hanging off the amps. The pre amp perhaps?

meaning watch loaded on the amps meaning subs , mids tops ect, meaning if you using cheap components , still wont sound good with any mixer regge pre amp..hope that makes more sense

normal house ceiling

not beeing rude bro, no such thing as normal hieght in venues ect it is what it is, just deal with orther boxs to suit venue hieght...

also just one more thing to mention, rememeber UK was the biggest hub in the world for reagge soundsystems, just a little mention Big smile

tight boundries? few examples, its allways tight lip man, memeba soundman would stratch off reggae 45s to sure yu didnt sneak and look on the tune  kno the tune and artist ect.

soundman amps allways beening a secret and dont share there build specs statch off values of components ect,

same for box , soundsman didnt share there box plans ect, as we now the scoop most controversy, bebated box thu reggae soundsystem circles

pretty common pratice in the UK as we whom grow up in the UK its nothing unusual tbh, 

thats the way it was/is still to a certain extent...

dont forget harking back to the Gaints of sound system 50s upwards , tha didnt want to know there sounds secrets....

totaly normally imho
Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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flinnt45 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote flinnt45 Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 8:12pm
Originally posted by flinnt45 flinnt45 wrote:

Well Roman

We both seek audio Nirvana for our own reasons special to us both, my aim is to demonstrate that vacuum state will blow solid state into the weeds for both sound quality and power, drag it into the forefront of sound system audio where it belongs, fairly portable the only amp which wont be a one man carry will be the sub amp, it will be old school suitcase size, but instead of being 600 watts will be 2,5 Kw
upper bass 1200 watts
mid 600 watts
and maybe An otl for the treble, must be 6c33cb tho you can tune the treble response by altering the value of the grid resistors
jbl 2404 and jbl 2426j for tops 12 db
jbl 2482 mids 300hz to 5khz 12 db
Gauss 4582 upper bass 90 hz to 300 hz 12 db
18 sound 21,s for sub in front loaded folding horns F3 29hz 24 db
JAH Kreator Hi Fi
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flinnt45 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote flinnt45 Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 8:14pm
My use of particular drivers are the best that I have found in each application bar none. particularly the 2482 nothin else sound as good as this best midrage compression driver ever made.
JAH Kreator Hi Fi
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Post Options Post Options   Thanks (0) Thanks(0)   Quote valve head777 Quote  Post ReplyReply Direct Link To This Post Posted: 26 February 2018 at 9:00pm
I used to sit with my ear to the door of our lodger who was exclusively into reggae at the tender age of four. My first lickle session that I was at was age about five( an after party for the drama club/class my mum sent me to). The bass cabs were taller than me. I am now in my late 40's

When you address me, it's my experience and opinion you get. Not gospel. As you might be able to tell, this subject is my passion, so I may come across in a certain way. Don't take it the wrong way. I used to be on the receiving end of a harsh tongue by the guy who influenced my learning to operate a pre amp (Levi from Jah Revelation rip).
You've mentioned the vintage aspect hence your enquiry into valve amps, and also the House's of Joy. That's why I've said my piece.

I also make Dub, there's a system in Leicester that cut my tunes. I own a vs2400. I wouldn't take that to a dance because I prefer to play x amount of cuts that are finished and I'm happy with. My Soundsystem is an instrument by extension.
You mentioned Mad Professor. He is a big star, and generally dubs performers on stage, occasionally running multi if he only has singers or MC's. I am not arregant enough to think I could hold my own in a session dubbing my own creations. My name isn't big enough. I would prefer to play pieces dubbed already by masters like Mr Scratch, King Tubby, Mad Professor etc.

We're going round in ever decreasing circles now
and, with respect, I can't add any more than I already have.
As said before, good luck Bredren

An may the Dub be wid u


Edited by valve head777 - 26 February 2018 at 9:00pm
Freedom of choice, choice of freedom.
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Roman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roman Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2018 at 2:37am
If I buy crest 9001 amps, how many do I need?

 I have purchased (8) JBL 2404H tweeters. I now have (6) subs, (6) 15's. Just need (10) more 18's and (2) more 15's.
I am thinking valve amplification for the 15's, horns and tweeters and crest 9001's for the subs.
My subs are JBL 2245H 18's. 600W continuous program and I believe 300W RMS.

As you all now I am building (4) quads for a total of 16 subwoofers. These speakers are 8 Ohms.
The crest 9001 specs are:
Stereo
8 Ohms 1100W
4 Ohms 2050W
2 Ohms 3000W

So with my little bit of amp power to speaker configuration knowledge I have concluded:
I could have (2) speakers per channel giving me a 4 Ohm load and 1025W per speaker (half of 2050W).
This would require (4) crest 9001's. One per quad. 

Or I could perhaps have one quad on one channel of a crest 9001 giving me a 2 Ohm load and a quarter of the 3000W per speaker equals 750W per speaker.
Then I would only need (2) crest 9001's.

I read crowns 'how much amplifier power do I need?' page here:

It recommends 2 times the continuous power rating of the speaker in amp power. So for the JBL 2245H that would be 2 times 600W equals 1200W. I assume I can have a nightclub to school hall sized dance at moderate to slightly bigger volume with 1025W per subwoofer and having 16 subs.

So I plan to get (4) crest 9001's with this conclusion.
Sound good?
  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roman Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2018 at 2:55am
I am going to net research (i.e. google search) how to prevent amplifier clipping and possible speaker damage.
There must be some scientific sensible practises to avoid damaging speakers.
Any ideas on the most intelligent ways to avoid damaging speakers in my scenario of 1025W at 4 Ohms per 600W continuous power JBL 2245H 18 inch subwoofers?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roman Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2018 at 3:58am
I know that mic'ing a live band will have bigger transient peaks than playing recorded music.
Crown's power amp requirement page I linked suggest 2.5 times the speakers continuous power rating for the amp wattage at the same Ohmage of the speakers.
This would equal 2.5 times 600W for the JBL 2245H which would mean 1800W.
I don't want to buy (8) crest 9001 amps so I can have 2200W per speaker. to cover the recommended 2.5 ratio of amp power. 
My assumption is that because I am using a large number of subwoofers (16) that having 1025W per speaker will be safe if I don't overload the input of the amps.
Local reggae sound system guys have told me they leave their amps on full gain and control the volume from the mixer.
My assumption is that as long as you don't send more than a line level signal to the amps then you won't cause clipping. But this is an assumption I have made based on my experience with piugging CD players or DJ mixers into line ins on home stereo's.

I haven't found clear explicit guidelines on how to avoid loudspeaker/amp clipping yet. But that is my assumption that as long as you don't feed the amp more than a line level signal it shouldn't clip in the amp ad the speakers will be safe.
The logical outcome should be that with this safety gain staging employed the loudness or SPL of the sound system will be simply limited to the 1025W power going to each subwoofer.

Maybe using my sound system as a PA for a live band would require a limiter to safe guard the amps from signal over line level.

Is my assumption that an amp wants to receive no more than a line level signal correct?
Is my assumption that this is the primary factor in preventing amplifier clipping?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roman Quote  Post ReplyReply Direct Link To This Post Posted: 10 June 2018 at 12:48am
Originally posted by flinnt45 flinnt45 wrote:

Hey Ronan correct me if I am wrong but you are playing 3 way? so four amps will do 16x 18 inch drivers will need an amp like the one in the pic i have posted
the double 15,s a thousand will do, two 300,s for the top end, these would be OTL they have the best treble of any type of amp bar none

I've bought 8 JBL 2404 tweeters to extend the highs above what the 2445H compression drivers produce. They start rolling off at 10Khz as I understand it.
So I am 4 way now. But tweeters shouldn't need much power.


Edited by Roman - 10 June 2018 at 12:51am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bob4 Quote  Post ReplyReply Direct Link To This Post Posted: 10 June 2018 at 5:53am
re:crest9001, I have posted an answer to you on diyaudio more than two weeks ago. 


You could also use the search function or google to find old discussion on speaker plans about the amplifier series you are interested in. 

for example this ten year old thread, explicitly answers SEVERAL of your questions: 

and some recent discussion:
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