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Amp to run 4 x 18TLW3000 8/4 Ohms!!!

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tehnicar007 View Drop Down
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    Posted: 16 December 2018 at 11:11am
Hi guys !
What Amp you recommend to run 4 x 18TLW3000 8/4 Ohms!!!

Ciaaao
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bob4 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bob4 Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2018 at 1:01pm
Two crest pro 10001
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Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote U.Viktor Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2018 at 2:27pm
PKN XE10000 (2 * 5000W+ @4R) is a very cost effective solution to drive two of 8R/2500W speakers per side.

If you want even more headroom H8-18002U (2* 10000W @2R) would be the best ever but that is expensive and not so common yet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2018 at 6:21pm
Originally posted by bob4 bob4 wrote:

Two crest pro 10001


And a forklift!   Smile


Earplugs Are For Wimps!
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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: 16 December 2018 at 9:49pm
deffo 10001 would be my choice too

no worries bout weight aslong them on castors , all good :-)
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2018 at 9:50pm
And ovisly no stairs lol
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulus Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2018 at 10:46am
i find it odd people moan about amp weight when wanting to run 4 or 8 cabs that weight 100kg each ?? obvz I expect it on big touring applications where they need minimum rack space and maximum output but not on smaller things
TRENDSETTER SOUND SYSTEM
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Post Options Post Options   Thanks (0) Thanks(0)   Quote U.Viktor Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2018 at 11:50am

The general misconception is that everybody thinks that the amp will drive a resistive load (all amps parameters stated by resisitive load) however the speakers are reactive. It means that the output current are usually OUT of phase with the coil driving Voltage!
Why it so important?
Most(if not ALL) analog amplifiers have a type of output stage which NOT allows to sink or source large current when the output devices see large momentary Voltage drop, especially when the output Voltage nears Zero but the load current still large..
Big big surprise than pretty large analog amplifier could be forced entering to output power dissipation protection of its power devices to prevent momentary overheating of junction layers if the current shift is unfortunate angle..
Here comes the advantage of modern switching amplifiers: with proper construction a good switching amp can deliver its max. output current at ANY output Voltage :-)
So while a large analog amp loosing control movement of Volice coils due activated momentary output dissipation (UxI) protection, maybe even a smaller switching amp could work better.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2018 at 11:59am
...surely that's a topology problem... not a PSU problem.
If it sounds like a gorilla is trying to escape, turn it down.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wilidapili Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2018 at 1:58pm
I’m also interested in how powerful of an amp is recommended for 2x TLW3000
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Post Options Post Options   Thanks (0) Thanks(0)   Quote efinque Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2018 at 2:15pm
Originally posted by mini-mad mini-mad wrote:

...surely that's a topology problem... not a PSU problem.

I read class AB amps have the best efficiency. However, a linear PSU will dissipate heat much more effectively than a SMPS, although switchmodes are generally working at 70-80% while a typical linear PSU is somewhere around 50-60%.. they weight a lot more, whereas with a switchmode you get switching noise, which, depending on the quality may or may not be audible.

EDIT : people have been succesfully using SMPS' in effect pedals etc due to their size, and I've seen some amps using them too.. maybe for small speakers they could be ok, but for heavy duty stuff like driving subs I wouldn't put my money on one.


Edited by efinque - 17 December 2018 at 2:27pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote U.Viktor Quote  Post ReplyReply Direct Link To This Post Posted: 17 December 2018 at 2:40pm
Originally posted by efinque efinque wrote:

Originally posted by mini-mad mini-mad wrote:

...surely that's a topology problem... not a PSU problem.

I read class AB amps have the best efficiency. However, a linear PSU will dissipate heat much more effectively than a SMPS, although switchmodes are generally working at 70-80% while a typical linear PSU is somewhere around 50-60%.. they weight a lot more, whereas with a switchmode you get switching noise, which, depending on the quality may or may not be audible.

EDIT : people have been succesfully using SMPS' in effect pedals etc due to their size, and I've seen some amps using them too.. maybe for small speakers they could be ok, but for heavy duty stuff like driving subs I wouldn't put my money on one.


No. Class AB amp shave almost the worst conversion efficiency ~ 50-60% maximum. Also plagued by the problem I have mentioned above^.

Class-D ( high frequency switching ) amps could have efficiency above 85% while very few reaches ~ 95% or more.

Linear (50/60HZ transformer) and poor switching power supplies without PFC are equally bad due their mains current distortion originated from 'peak rectification', which end sometimes as bad as they consumes 5X or 10X of the output power.
For example a 1000W SMPS(without PFC) or toroidal transformer would needs 4.3A average (6.2A peak) from the mains if the power factor would be correct (1.0) but unfortunately - due peak rectification - usually pulls out 50 or 100A peaks with very narrow conducting angle which is bad for the mains, generators and could create dangerous over Voltage spikes on the opposite phases. Learn and understand why good power factor are so important.
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