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Are These Watson amps ?
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ben 13 View Drop Down
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    Posted: 22 February 2022 at 2:29am
I everyone

I'm looking after one if this amp. Please send me a pm if you want to sell.

Ben 
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Nitz V1505 View Drop Down
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What I love about the amps is the dual power supply each with its own power cable. Perfect for venues with standard wall sockets. Thanks again Muckerbarnes for building these beauties.
LET THE BASS ROLL LIKE THUNDER
& THE TOPS LIKE LIGHTNING.....
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The Door Youth Project. Stroud Sub Rooms.
 
I have a 20 year old duff one here. Easy fix for your Fringe subs.
Billy Dawg.
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Points: 2605 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jimmer Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 10:57pm
I need a sub amp for this years fringe festival Malc Wink and whats this charity event?
Light travels faster than sound....That's why some people appear bright until you hear them speak!
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i miss my old one, boy she went low Big smile
CELTIC SUBSONIC SOUND SYSTEMS
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Nitz V1505 View Drop Down
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Points: 1719 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Nitz V1505 Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 5:59am
I beleive Narrinder has some Nivitz? They sound so much deeper on sub than a Crown for example.
 
There are some in the USA, Singapore, Dubai etc still going. The one I have shown recently in pics with Billy dawg come back here in March 2012 after some 20 years hard labour. A few FET's and it went back to the installation it came from. It was fitted there to see how reliable it would be............... Hence like others... no labels or badges.


Yes Mucker I have 3 of the larger ones and the smaller one which is beast in its own right. These weigh a ton and are built like tanks. I have hung a g sub a side on these the result was serious. The vlf are seismic,no joke. Comparing it head on with my brothers EV p3000 ,as we know has conservative power specs , it just sounded heavier without breaking a sweat. Just so glad I got these when they came up for sale.



Edited by Nitz V1505 - 06 February 2013 at 6:00am
LET THE BASS ROLL LIKE THUNDER
& THE TOPS LIKE LIGHTNING.....
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mykey- View Drop Down
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Points: 6114 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 5:46am
Originally posted by Muckerbarnes1 Muckerbarnes1 wrote:

They are not Watson amps. Chris Watson could not design or conceive such. I do know the guy that did though. These will deffo have some other name on the PCB's. There was a breach of copyright which was not followed up. Better devices were conceived instead.
 
They are 2x 750 and 2x 1400. Made as one off's for a system. This would of been with a dedicated crossover.
 
Again both are very early units and would of been part of a system along with subs, mid/hi and a crossover. The sub will be very heavy. Circa 35Kg.
 
In the absense of nylon 66 to mount the 'live' heavy heatsinks hardwood was used. This was common in the '70's. Wood is a great insulator at these voltages and strong for the weight applied.
 
I should re-iterate; there are no 4K amps. There never was. You may wish to load at 2 ohms. You may get away with it. The original design ideas were 4ohms and very heavy duty for sub, hence mass devices. The very original engineering notes were for a 1K amp, which very quickly became 1200, then 1400.
close to 50kg Chris's big boys were
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Points: 969 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Wikl109 Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 4:04am
Great thread. Amazing work Malcolm, always makes me smile stuff like this.
Cheers, Chris.
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Points: 3230 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 3:30am
Wow you built them mucker Just GreatThumbs Up..thanks for the In depth Info appreciated mate..

cheers..
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You could not build those in the late '70's Jayson. The Hitachi o/p FETs did not have high enough voltage ratings then.
 
I built the first of these in 1990 era. At first with later Hitachi FETs, then with Semi Lab dual die FETs as above. They were based on a Hitachi derrived layout that I used in the early 80's, then modified and upgraded. Power op's of over 1K/ch would have been very rare early 80's.
 
They were conceived to drive our sub systems at first, then later the whole rig with a xover/EQ/controller I designed and built for the system. Later ones had a posh regulated pcb and a weird heat exchanger that I made a 'plug' for. The heat exchangers were cast locally. Then they were copied............. and had a different logo on the pcb. Hence the change from me.
 
I beleive Narrinder has some. Nivitz? They sound so much deeper on sub than a Crown for example.
 
There are some in the USA, Singapore, Dubai etc still going. The one I have shown recently in pics with Billy dawg come back here in March 2012 after some 20 years hard labour. A few FET's and it went back to the installation it came from. It was fitted there to see how reliable it would be............... Hence like others... no labels or badges.
Billy Dawg.
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Joined: 30 December 2011
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Points: 3230 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 1:11am
Beasts of amps man was thay built for "Reggae Soundsystem Soundman Amp"? bcus thay look like it none badged ect.

were these a one off? 
were thay named/badged/logo ect up?
Build era late70/80s? 

thay looked thay built like the Soundcrafts Huge Beefy Builds

some more info please very Interesting amps

thanks..


Edited by Dub Specialist - 06 February 2013 at 1:18am
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wayward91 View Drop Down
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Points: 676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wayward91 Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2013 at 12:30am
Haa, it was a joke, I was supposed to put of the 1970's on the end...
Just curious, would the output devices be the same as in the old ppx's I'm not well versed on hitachi devices, only they sound nice.
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