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Amp for running 6x Oberton XB1500

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junoprobelaunch View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote junoprobelaunch Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2018 at 7:50pm
Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

This beast wat yu need

Don't worry about yu mikey mouse soft-power , get a real reagge big-boy amp man

lol hehehehehehehehehehe



Holy Censored... that hardly looks like an amplifier and more like something you'd use to power a city
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2018 at 9:16pm
Re read post from page 4
EmbarrassedEmbarrassedEmbarrassedCryOuch
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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2018 at 10:06pm
Looks a bit more sensible, you're more on the right track now.

Interesting thing is that when the coil gets hot, the phase angle of the load reduces as assuming that the imaginary reactive part does not change you have just lowered the phase angle by increasing the real component instead.

So there is at least one benefit from drivers getting a little warm. They pull less current and less reactive power is being sent back to an amp. But you just don't want them too warm...

Still think the main amplifier killer is using cabinets with large phase angles in combination with low impedance around the low frequency regions where musical content is significant. This will be either side of the resonance peak so a vented box tuned to perhaps 40-50hz might cause an amp to dissipate a lot more extra heat than a box tuned to 60Hz, assuming that there is a lot of content around that frequency.

The only thing you can really do about it apart from designing cabs to present nice loads in the first place, is to buy over-engineered amps with high transistor safe operating areas, and then run them sensibly. Which funnily enough is where all the empirical advice tends to end up.

Wish I had more (any) spare days to play around with this stuff.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote fatfreddiescat Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2018 at 10:40pm
Originally posted by odc04r odc04r wrote:

Looks a bit more sensible, you're more on the right track now.

Interesting thing is that when the coil gets hot, the phase angle of the load reduces as assuming that the imaginary reactive part does not change you have just lowered the phase angle by increasing the real component instead.

So there is at least one benefit from drivers getting a little warm. They pull less current and less reactive power is being sent back to an amp. But you just don't want them too warm...

Still think the main amplifier killer is using cabinets with large phase angles in combination with low impedance around the low frequency regions where musical content is significant. This will be either side of the resonance peak so a vented box tuned to perhaps 40-50hz might cause an amp to dissipate a lot more extra heat than a box tuned to 60Hz, assuming that there is a lot of content around that frequency.

The only thing you can really do about it apart from designing cabs to present nice loads in the first place, is to buy over-engineered amps with high transistor safe operating areas, and then run them sensibly. Which funnily enough is where all the empirical advice tends to end up.

Wish I had more (any) spare days to play around with this stuff.



When I swapped my bass drivers from 6th order bandpass (two large impedance  peaks in there workjng range) into ported horns that partially damped the upper impedance peak my amps ran much cooler, so totally agree with what your saying.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote junoprobelaunch Quote  Post ReplyReply Direct Link To This Post Posted: 17 October 2018 at 11:04pm
Originally posted by gen0me gen0me wrote:

Re read post from page 4
EmbarrassedEmbarrassedEmbarrassedCryOuch

 I assume you are referring to
Originally posted by odc04r odc04r wrote:

it is better to push 200% more drivers 50% of their capabilities vs 100% of drivers to their limit for a happier result all round
when I said I'd be running my WSXs "cranked up"? Fear not gen0me, I heeded all the advice and information in this thread very carefully and simply meant that for a few short points in the session I would push them closer (not TO) their safe limit. In general, I will be running this system relatively conservatively because before I start trying to squeeze every last db out of my drivers I feel I need to gain the neccesary experience to be confident doing so.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 9:14am
Originally posted by Sypa Sypa wrote:

I dont know where this discussion went ,but from first hand experience with xb1500s .6 now 8 , ram bux 5.0 ran them pretty hard/loud but was riding the clip for whole nights,got tired of that and got a k20.
Now thats running them properly with 0 red lights in sight and lots of control.
Dont have experience with other lightweight amps,but in the end you can get away with lesser headroom for a long time if its a quality amp,but a k20 just feels right you know LOL.

Also depends how are you gonna run them,our parties/jobs somehow always end up full tilt in the end.I reckon 6wsx wont need to be ran full tilt if youre sensible, unless massive case of not enough rig for the gig.



+1

Funny you mention the Ram BUX 5.0. A friend had 2 of those running 8 x 18" Beymas (not sure what model) and wasn´t convinced. He then swapped the Rams out for 2 x Crest 8001´s - supposedly less wattage, but swears that the system now sounds better - and louder.

Like you say, a quality amp is always better.   Smile



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sypa Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 11:31am
Ah cmon the Ram aint bad haha. I know im jumping in my mouth a bit here but i actually preffered the sound of the lowest lows <40hz the Ram used to produce. It felt a bit heavier than the k20, whereas the k20 is like a air blower cant really hear the crunchyness if you know what i mean ..
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 2:47pm
Originally posted by levyte357- levyte357- wrote:

Oh goody, back to actually talking about amps..

As thread title, requested...

LOL


Everything discussed is intrinsically part of amplification. You can deny it all you like, but you're still wrong
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Post Options Post Options   Thanks (0) Thanks(0)   Quote csg Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 3:30pm
Originally posted by junoprobelaunch junoprobelaunch wrote:

Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

This beast wat yu need

Don't worry about yu mikey mouse soft-power , get a real reagge big-boy amp man

lol hehehehehehehehehehe



Holy Censored... that hardly looks like an amplifier and more like something you'd use to power a city

not when you look at the scale on the ammeter - which looks like 15A at the top...which at 240V would give you a maximum total output of around 3Kw assuming 85% efficiency - which it probably isn't.

 anyone looked inside? Maybe there is something else hiding inside...
“The fact is this is about identifying what we do best and finding more ways of doing less of it better”
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Post Options Post Options   Thanks (0) Thanks(0)   Quote valve head777 Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 4:06pm
Originally posted by csg csg wrote:

Originally posted by junoprobelaunch junoprobelaunch wrote:

Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

This beast wat yu need

Don't worry about yu mikey mouse soft-power , get a real reagge big-boy amp man

lol hehehehehehehehehehe



Holy Censored... that hardly looks like an amplifier and more like something you'd use to power a city

not when you look at the scale on the ammeter - which looks like 15A at the top...which at 240V would give you a maximum total output of around 3Kw assuming 85% efficiency - which it probably isn't.

 anyone looked inside? Maybe there is something else hiding inside...


Yeah but
yeah but........
They're REGGAE WATTS.....!!
Freedom of choice, choice of freedom.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 4:17pm
Originally posted by valve head777 valve head777 wrote:

Originally posted by csg csg wrote:

Originally posted by junoprobelaunch junoprobelaunch wrote:

Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

This beast wat yu need

Don't worry about yu mikey mouse soft-power , get a real reagge big-boy amp man

lol hehehehehehehehehehe



Holy Censored... that hardly looks like an amplifier and more like something you'd use to power a city

not when you look at the scale on the ammeter - which looks like 15A at the top...which at 240V would give you a maximum total output of around 3Kw assuming 85% efficiency - which it probably isn't.

 anyone looked inside? Maybe there is something else hiding inside...


Yeah but
yeah but........
They're REGGAE WATTS.....!!


If its anything like most reggae amps and pre's what is inside is mostly air amd a spaghetti mess of wiring! But that's all part of the fun.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote James Tengo Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2018 at 5:13pm
Reggie Watts?
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