Earthquake Magma 15" Driver - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 24 Old 01-22-10, 03:05 AM Thread Starter
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Ken
 
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Location: Auckland, New Zealand
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Earthquake Magma 15" Driver

Hi

Will the Earthquake Magma 15" be any good for home theatre use in seal or ported box?

I currently run the jaycar 350w amp and the jaycar venom 15 in a sealed box

Certainly more than enough spl but i want to clean the bass up as i have just upgraded to a thx avr and its starting to show up as a weakness from time to time in relation to delay and sometimes it can sound a bit muddy

I dont want to spend too much now, this is more like a small upgrade which i am hoping to keep the same amp and upgrade the driver and enclosure. I dont want the enclosure to be too big either

Any help is appreciated

I have an electrician friend who i may be able to convince to mod my amp to take away the 35hz booster if it actually makes that much of a difference.

http://www.earthquakesound.com/magma.htm
1500 Watts Max
FS=26Hz
Qms = 3.5313
Qes = 0.4603
Qts = 0.4072
VAS = .75Ft3
Xmax = 0.5"
85dB 1W/1M
Revc = 6.78
Levc = 6.3mH @ (1 kHz)
3" Dual Voice coil(2x3.2-ohms)
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post #2 of 24 Old 01-22-10, 05:31 AM
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David Burn
 
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Re: Earthquake Magma 15" Driver

Have you already purchased the magma? I only ask this because the Jaycar amps can only be wired to 4ohm and up which means you will only see 240w into 8 ohms.
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post #3 of 24 Old 01-22-10, 01:42 PM Thread Starter
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Ken
 
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Re: Earthquake Magma 15" Driver

No not yet, im just looking at this driver because it is so cheap now. $250NZD which is around $130usd
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post #4 of 24 Old 01-22-10, 02:18 PM
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David Burn
 
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Re: Earthquake Magma 15" Driver

With that amp you need to look for a dual 2 ohm Sub or a single 4 ohm sub to get the most out of the Jaycar Amp, But it would still work if you wanted to go with the magma.

The Jaycar 350w amps were by far there best plate amp and still are, but there are now discontinued.
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post #5 of 24 Old 01-22-10, 03:24 PM
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Re: Earthquake Magma 15" Driver

How much boost does the amp have?




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post #6 of 24 Old 01-22-10, 04:43 PM
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David Burn
 
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Re: Earthquake Magma 15" Driver

I believe it is 6db @ 35hz
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post #7 of 24 Old 01-22-10, 07:10 PM
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Re: Earthquake Magma 15" Driver

This sub would only work with passive radiators as it models to 1.5 cu.ft tuned to 21 hz. The series wiring of a 8 ohm load means the amp will produce 175 watts to the sub. You'd be better off finding a different sub for your needs.




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post #8 of 24 Old 01-22-10, 08:13 PM Thread Starter
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Ken
 
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Re: Earthquake Magma 15" Driver

Quote:
Mike P. wrote: View Post
This sub would only work with passive radiators as it models to 1.5 cu.ft tuned to 21 hz. The series wiring of a 8 ohm load means the amp will produce 175 watts to the sub. You'd be better off finding a different sub for your needs.
can you recommend a driver
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post #9 of 24 Old 01-22-10, 08:57 PM
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David Burn
 
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Re: Earthquake Magma 15" Driver

http://www.affordabledrivers.com.au/...ffd88f9bc38ddf

This is a great budget sub that would work well with your Jaycar amp, but you need to modify the amp to remove the boost.

You can find the instructions on this website.

http://www.subwoofer-builder.com/amps-all.htm
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post #10 of 24 Old 04-24-10, 07:18 AM
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Re: Earthquake Magma 15" Driver

Where can I buy the Magma for that? I need to replace mine!
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