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Smarty90

Which amp should I buy to power my sub?

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Hi all,

After reading maz's post I went and picked up a Alpine SBR-S12D4 12" Type-R subwoofer for next to nothing off of The Facebook.

Only problem is that its passive and I dont have an amp to drive it!  

 

I was fully intending to use the driver and build a sub box for it, however it already came in a really good sub box so I want to try it as is for now. 

 

It has dual 4 ohm coils in it, and is rated at 1000W RMS, what sort of amp would I be best to use and do I need to run a cross over or feed it direct from my amp?

 

I have a Yamaha RN-500 amp which is driving my current MS30 bookshelf speakers.  So it has a sub out RCA.

 

Anyway after some advice weather I build an amp for it or is there a cheap amp to look out for which would do the job?

 

75643597_2605328922838722_5603445652710227968_n.jpg?_nc_cat=110&_nc_oc=AQkHMaT0y0OAwLRTQU5GCFuTY8PhI_hdjlmtiz24mZMdM03tlvEOHBx_HW53Kz8jAO97jPSfTYjcdnhT9RdBqoLw&_nc_ht=scontent.fmel8-1.fna&oh=1a94b98f20583eb0d9d1d9e97afac7de&oe=5E1AED8E

Edited by Smarty90
updated amp number

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It looks like car subwoofer so may not be so great for the house but you can try it out. Assuming you havnt spent much on it wouldn’t be worth overspending on an amp for it. A used plate subwoofer amp like an Altronics or Jack module for around $50 would suit from Gumtree when available. You can also cannibalise from other used subwoofers which the box, woofer and plate amp in total costs about $50-100 from generic cheap brands.

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Doesn't really need to be anything much in the way of an amp, bigger the better.

 

More to the point an appropriate crossover filter to integrate the sub into the rest of the speaker system.

Could be passive, active digital. 

Photo is of an amp/crossover I use personally for my sub rig. C Core Passive crossover for 30Hz set up like that, brand X hand made amp.

The ///Alpine dual coil sub is particularly cool as it could be connected to separate amp channels 

  

IMG_6343.JPG

I agree the Alpine is an excellent driver and personally have used many over time

 

Edited by Dirkgerman

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1 hour ago, Smarty90 said:

Hi all,

After reading maz's post I went and picked up a Alpine SBR-S12D4 12" Type-R subwoofer for next to nothing off of The Facebook.

Only problem is that its passive and I dont have an amp to drive it!  

 

I was fully intending to use the driver and build a sub box for it, however it already came in a really good sub box so I want to try it as is for now. 

 

It has dual 4 ohm coils in it, and is rated at 1000W RMS, what sort of amp would I be best to use and do I need to run a cross over or feed it direct from my amp?

 

I have a Yamaha RN-500 amp which is driving my current MS30 bookshelf speakers.  So it has a sub out RCA.

 

Anyway after some advice weather I build an amp for it or is there a cheap amp to look out for which would do the job?

 

75643597_2605328922838722_5603445652710227968_n.jpg?_nc_cat=110&_nc_oc=AQkHMaT0y0OAwLRTQU5GCFuTY8PhI_hdjlmtiz24mZMdM03tlvEOHBx_HW53Kz8jAO97jPSfTYjcdnhT9RdBqoLw&_nc_ht=scontent.fmel8-1.fna&oh=1a94b98f20583eb0d9d1d9e97afac7de&oe=5E1AED8E

Your best plan IMO is to locate the needed amplifier as close as you can to the subwoofer. 

I would look at either building a kit amplifier or getting a Class D amp module , like a Hypex 

and mount it on the rear, with a suitable heatsink  https://www.hypex.nl/p/technology/ncore

 

Then assess from manufacturers data,  or physically draw the existing passive crossover network, and if then needed 

provide inductors, seen in the above image which as well as filtering, reduces what is called, 

back Electro magnetic force ( EMF ) from reentering the amplifier, as a un needed signal that

otherwise adds to the amplifiers task.  

 

 

 

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Hi all,
After reading maz's post I went and picked up a Alpine SBR-S12D4 12" Type-R subwoofer for next to nothing off of The Facebook.
Only problem is that its passive and I dont have an amp to drive it!  
 
I was fully intending to use the driver and build a sub box for it, however it already came in a really good sub box so I want to try it as is for now. 
 
It has dual 4 ohm coils in it, and is rated at 1000W RMS, what sort of amp would I be best to use and do I need to run a cross over or feed it direct from my amp?
 
I have a Yamaha RN-500 amp which is driving my current MS30 bookshelf speakers.  So it has a sub out RCA.
 
Anyway after some advice weather I build an amp for it or is there a cheap amp to look out for which would do the job?
 
75643597_2605328922838722_5603445652710227968_n.jpg?_nc_cat=110%26_nc_oc=AQkHMaT0y0OAwLRTQU5GCFuTY8PhI_hdjlmtiz24mZMdM03tlvEOHBx_HW53Kz8jAO97jPSfTYjcdnhT9RdBqoLw%26_nc_ht=scontent.fmel8-1.fna%26oh=1a94b98f20583eb0d9d1d9e97afac7de%26oe=5E1AED8E&key=73462ef8121fe47c7cadae2202f6baa1ee99872974c0af9cd09526405d246802
Have a look at some pro audio amps, they can be quite powerful, cheap, but also loud. Sometimes you can do a mod to deal with the loud fans inside such amps.

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