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Author Topic: Beta Three ΣJ218 - Chinese 2 x 18''  (Read 12148 times)

Brad Weber

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Re: Beta Three ΣJ218 - Chinese 2 x 18''
« Reply #10 on: September 17, 2012, 07:31:11 am »

Here are the specs :
102dB/1W/1m sensitivity, 1,000W"RMS" and 134dB maximum output.  102+30<134, so where did the extra 2dB come from?  Apparently because in the manual the power rating is given as 1,600W/3,200W/6,400W.  But then the manual also refers to MDF rather than 15-ply Birch construction, to the trapezoidal design when it shows a rectangular box, to the HF transducer and horn for a sub, etc.  Some of these issues may be attributable to language factors but they do not exactly inspire confidence in the product.

Caleb Dueck

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Re: Beta Three ΣJ218 - Chinese 2 x 18''
« Reply #11 on: September 17, 2012, 12:48:29 pm »

Any new product that competes by being cheap is / should be guilty until proven innocent.
Experience is something you get right after you need it.

Amplio Systems

chris mawbey

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Re: Beta Three ΣJ218 - Chinese 2 x 18''
« Reply #12 on: September 19, 2012, 03:43:50 am »

Has anybody heard of these chinese subs before ?
I'm in Australia , and after a double 18 sub . It's pretty slim pickins' from the local dealers. They don't keep any stock for me to demo.

The cab is 15mm birch , and pretty weighty.

Here are the specs :

I can get them for about $1400AU (our dollar is close to parity with US$ at the moment )

The only other contender is the mighty SRX728s , but it's an extra $1000 bucks. :(

thoughts ? opinions ?


im new here and i am The Agent for this brand of Speaker in South Africa. I can assure you that the quality and build of this product is very good. We have been selling them ( B3 ) since 2005 with very good success.

« Last Edit: September 19, 2012, 03:46:53 am by noizyboy »

Mac Kerr

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« Reply #13 on: September 19, 2012, 07:45:56 am »

im new here

Please go to your profile and change the "Name" field to your real first and last name as required by the posting rules displayed in the header at the top of the section, and in the Site Rules and Suggestions in the Forum Announcements section, and on the registration page when you registered.

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