RF Prime R250-1 amp.. wired parallel internally??

sprisneo

Junior Member
Hi, I'm having a problem trying install a proper amplifier to power two JL audio 10w1v2-8Ohm subwoofers. I will try my best to keep my explanation succinct and clear, but if there's any important detail that I missed or am wrong about, please let me know.

After research, I realized it would be best to wire the two 8ohm subwoofers in parallel, therefore I can achieve the 4-ohm system. Therefore, the amplifier I chose was RF prime R250-1, which can provide around 150W RMS at 4ohm. Although this is a mono amplifier, there are 2 +/- terminals and they are wired parallel internally. Appropriate power, easy parallel installation, so I thought this amp would be perfect.

But one thing that I realized installing he amp yesterday was that the subwoofers actually lose power when I connect the two subwoofers to the amp (to the 2 +/- terminals). The bass becomes much more firm and louder when I connect only one subwoofer to the amp. I was confused because I was expecting the subwoofers to perform better when I wire them parallel because doing that will lower the resistance to 4-ohm... and according to what RF claims, I did wire them parallel by just connecting the two subwoofers to the 2 +/- terminals of the amp right...?

The details/specifications of the amp and subwoofers can be found in following links

amp:

rockfordfosgate.com/products/product_details.asp?item_id=116200&locale=en_US

subwoofer:

dealercostcaraudio.com/10w1v2-8.aspx

Sorry I couldn't put the full URL because it won't let me put URL in the post.. you will have to add the 'world wide web' initials in the front of the links.

Any insight would be greatly appreciated.. Thank you!

 
Those are just extra terminals its a mono signal internally parallel, They give you extra terminals for easy install so you dont need to try and cram wire into 2 terminals.
In your case just use one + and one - terminal.

here is a wire diagram for 4ohm mono with 2 8ohm drivers.
Thank you very much for the advice. I just fixed the wiring and it works great now.

 
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