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Author Topic: The Perfect Amp for LAB Subwoofer  (Read 11206 times)

Josh Billings

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Re: The Perfect Amp for LAB Subwoofer
« Reply #10 on: January 28, 2008, 05:39:40 pm »

not at 1.5 ohms per channel

-Josh
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Al Limberg

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Re: The Perfect Amp for LAB Subwoofer
« Reply #11 on: January 28, 2008, 06:11:31 pm »

Due to the acoustical impedance of the LabSub in conjunction with the electrical impedance, the load the amplifier sees from a pair of cabinets per channhel is probably closer to 3-4 ohms per amp channel.

?;o)
Al

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Ivan Beaver

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Re: The Perfect Amp for LAB Subwoofer-Not just a single spec.
« Reply #12 on: January 29, 2008, 06:38:53 pm »

Kevin Pippen wrote on Sun, 27 January 2008 23:29

Hello Al,

I have done some research and have made my conclusions that amplifiers with a high damping factors have greater control over the movement of the speaker cone and will deliver tighter bass...http://www.teamaai.net/kevin/2cents.gif

That's just me,...and of course everyone's entitled to their opinion...Smile

Kev




Yes that is correct, in a way.  High Damping can help, but there is  much more that contributes to the overall "sound" than damping.

I have done  picky tests with amp that have damping factors over a 10:1 range (and in between).  In one case the amp with the lower damping factor easily beat out the one that had damping 10 times higher-in terms of overall bass "tightness" with music.

Do some more reading and you may have a different opinion.  You have to look at ALL the issues involved, NOT just a single number.
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jeffhtg (Jeff Kenney)

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Re: The Perfect Amp for LAB Subwoofer
« Reply #13 on: January 29, 2008, 09:07:04 pm »

What is the application?

I still swear by my vz5000's.. old as dirt and still slamming away my labs.. I'm crazy tho and have 1 per side.. and still have some 4050's running another 4.. But I'm running heavy dance music 7 nights a week with DJ's slamming into limiters.

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Kevin Pippen

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Re: The Perfect Amp for LAB Subwoofer
« Reply #14 on: January 29, 2008, 10:32:00 pm »

Kevin Pippen wrote on Sun, 27 January 2008 07:54

Anyways,...in addition to output, power requirements, and the normal specs I would consider a high damping factor for a sub duty amp...http://www.teamaai.net/kevin/2cents.gif

EDIT: My "dream" amp for sub duty would be one of the powersoft K series (damping factor >5000 20-200Hz)...Very Happy  

Kev


Ivan Beaver wrote on Tue, 29 January 2008 17:38

Do some more reading and you may have a different opinion.  You have to look at ALL the issues involved, NOT just a single number.


Hello Ivan,

I love your advice because I'm always reading, and doing research...but some how things got out of context through the course of this thread... I'm the first to admit that I'm not a pro-sound expert but on the other hand I'm not a complete idiot either... I started out in sound as an early 70s audiophile (and usually a stoned one at that)... I definitely agree that all things should be considered when specking an amp for a specific purpose... If money were no object I "personally" would take a hard look at the Powersoft K series sub-duty and not just because of it's damping factor... It requires little power and it offers a huge output to weight ratio,...and what can I say...I just like em...Smile

Cheers!

Kev  

     
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Greg Spydell

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Re: The Perfect Amp for LAB Subwoofer
« Reply #15 on: January 31, 2008, 12:06:11 am »

I have had huge success with the Digam Powersoft K10... hooking up four (4!) Adamson T21's... rocking out... and never destroying the amp. The K10 weighs around 25lbs, and is 1RU, and when hooked to a 240V you get 14kW... amazing. Sounds great for a digital amp with full DSP. The Adamson T21's are a 2ohm box... so you just build a Series/Parallel Connector and you are all set... of-course you are under-powering but there is an amazing amount of headroom. Smile

Powersoft:

http://pro-audio.powersoft.it/an_series_list.php?use_in=53&a mp;a mp;id_menu=271&obj=12


Adamson T21:

http://adamsonproaudio.com/products/yaxis/t21/t21.htm
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Josh Billings

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Re: The Perfect Amp for LAB Subwoofer
« Reply #16 on: January 31, 2008, 09:02:41 am »

jeffhtg (Jeff Kenney) wrote on Tue, 29 January 2008 18:07

What is the application?

I still swear by my vz5000's.. old as dirt and still slamming away my labs.. I'm crazy tho and have 1 per side.. and still have some 4050's running another 4.. But I'm running heavy dance music 7 nights a week with DJ's slamming into limiters.




Looks like we are running similar setups. I have large dance music artists come through all the time and we had 4 LABs on 4050s and they sounded pretty good. Not sure how far i could of pushed them (to clip all night and survive?)

Have you blown drivers on the 4050s?

P.S. The 5000s are power hogs (same reason i didn't just hook up 4 to the PL6)

-Josh Billings
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Josh Billings

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Re: The Perfect Amp for LAB Subwoofer
« Reply #17 on: January 31, 2008, 09:08:11 am »

Hey thanks for recommending the most expensive amplifier made Smile

C'mon guys lets be realistic.

I bought 2 4050HDs and found the 4050HD seemed like a pretty safe amp choice for LAB Subwoofers (1 per channel). This is driving them not SUPER Hard, but close to clip.

I was able to blow a pair of LABs off a RMX1850HD (In bridged mode per subwoofer).

-Josh Billings
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Kevin Pippen

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Re: The Perfect Amp for LAB Subwoofer
« Reply #18 on: January 31, 2008, 11:46:05 am »

Josh Billings wrote on Thu, 31 January 2008 08:08

Hey thanks for recommending the most expensive amplifier made Smile

C'mon guys lets be realistic.

Josh Billings

I did say it's my dream amp...Smile

Kev

EDIT: Edited for stupidity...
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Pascal Pincosy

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Re: The Perfect Amp for LAB Subwoofer
« Reply #19 on: February 01, 2008, 05:04:04 am »

Josh Billings wrote on Thu, 31 January 2008 14:08

Hey thanks for recommending the most expensive amplifier made Smile

C'mon guys lets be realistic.


The thread title is "The Perfect Amp for LAB Subwoofer"  Cool

FWIW, the 2 amps (out of the many I've tested) that sounded best with my Bassmaxx hornloaded subs were the QSC PL380 and the Powersoft.

And the Dynacord PowerH is a great option as well if you're trying to run off wall power.
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