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Author Topic: Would this amp/lab sub combo work well ?  (Read 2202 times)

Alan Star

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Would this amp/lab sub combo work well ?
« on: January 03, 2006, 06:36:57 pm »

I recently aquired a qsc plx 2402, I am wondering if it could run 2 lab subs ? If i configure the drivers in each cabinet in series it shows about 9 ohms on my reader so then if I paralelled the cabinets it should give me a total of about 4 or 5 ohms, the plx 2402 bridged gives 2400 watts into 4 ohms, would it be safe to run it like this ?
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Alan Searchwell

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Re: Would this amp/lab sub combo work well ?
« Reply #1 on: January 05, 2006, 06:01:36 am »

Welcome to the lab sub forum! Take some time to search the archives for topics which are related to your questions. Please note that this format of the forum covers less than the last two years of discussions (since April 12, 2004). Since the project was spun off from the "Live Audio Board" forum on January 8, 2002, there are thousands of posts that are on the original board here:

http://www.prosoundweb.com/community/forum.php?board=3

The search page for that forum is here:

http://www.prosoundweb.com/community/search.php?board=3

Pay particular attention to the post at the top, "! LAB Subwoofer Project / Forum FAQ" as it gives a lot of key information and a good general background. Some of this info is not included in the sticky posts at the top of the current forum. I'll take this opportunity to suggest to Craig that he add these two links somewhere in the " READ THIS BEFORE POSTING"  sticky post.

Having searched both forums you will find that this topic has just about been beaten to death. Just to add my 2c, I tested my single lab sub soon after in finished it about a year ago, with a PLX 3002 in bridged mono mode and it survived! When I complete the four I plan to build I will be using two PLX 3402.
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Searchie in Kingston

Ivan Beaver

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Re: Would this amp/lab sub combo work well ?
« Reply #2 on: January 05, 2006, 08:46:10 pm »

To add to what Alan said-by your "reading", I am assuming you are are using an ohmmeter.  That just reads the DC resistance of the coil-NOT the impedance.  The impedance will be higher.  The drivers are typically 6 ohms each and "usually" (I am not sure of the lab subs) horn loading will raise the impedance of the driver-sometimes up to twice what the open air impedance is.

Follow ALans suggestions.
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For every complicated question-there is a simple- easy to understand WRONG answer.

Can I have some more talent in the monitors--PLEASE?

Ivan Beaver
dB Audio & Video Inc.
Danley Sound Labs
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