Sub And Amp

[Turk1]

Hello guys, I recently bought two new amps for my system to replace my old ones.

I got the Soundstream Lil Wonders. The LW 1.800 Mono block and the LW 4.500 four channel.

Well after going into my system alot more, I have realized the subs that I have currently run at 8ohms. I have two Rockford Fosgate RFR 1812 subs.

Now to my understanding my subs will be underpowered alot correct? I am thinking of selling these subs and going for the Soundstream 10" T5-10 subwoofer.

Below are some pictures for you understanding.

My new monoblock amp...Soundtream LW1.800

http://www.ryda.com.au/Soundstream-LW1-800...er-p/lw1800.htm

Common Features
LED Power and protection indicator
High and low level input
Selectable X-over: HPF/Full/LPF w BPF capability
Continuously-variable low pass crossover: 50Hz-4KHz
Continuously-variable high pass: 15Hz-500Hz
Bass boost: 0dB / +6dB / +12dB
Soft turn-on circuit
2 Ohm Stable stereo operation
Mosfet pulse width modulated power supply
Remote subwoofer level control: LW1.400 LW1.800
Increased efficiency by 10-15%
Higher S/N ratio due to new circuit optimization
Lower THD due to modernized circuitry
Higher damping factors for better drive control
Improved crossover filters
Upgraded output transistors for improved reliability
Better ground isolation for less noise
Increased protection to reduce speaker damage
Increased linearity on bass remotes
Direct signal input to 5th channel


Specifications
Power 4ohm: 400 x 1
Power 2 ohm: 800 x 1

My current subs...2x Rockford Fosgate RFR 1812

I am thinking of selling both my Rockford Fosgate subs and getting this:

http://www.ryda.com.au/Soundstream-T5-10-1...ofer-p/t510.htm

FEATURES
Cast Aluminum Basket
Hand Laid Pulp Paper Cone
One Piece Gasket/Tall Rubber Surround
Large PP Injected Dust Cap
Dual Stacked Magnet Assembly (Triple Stack on T5-15)
Dual 2 Ohm 3” Aluminum Voice Coil
Vented Back Plate
Integrated Tinsel Leads
Nickel Plated Push Terminals
Durable ABS Plastic Motor Cover


Specifications
RMS Power Handling (Watts): 800
Magnet Weight (Oz):1600oz
Freq. Resp (Hz): 35 - 300Hz
SPL (dB): 81 db
Mounting Depth (Inches): 6.625"
Enclosure Type: Sealed & Vented

Would appreciate anyones help and maybe some suggestions. Should I keep my RF's? Should I get a different sub to the one I mentioned? Anything to help me out for the best.

Thanks guys!

[nicr4wks]

Got a Multimeter?

Look's like the fosgates are dual voice coil by the double ohm listing, should be able to wire them down to 2ohm and get the output you're after from the amp.

Check out the wiring calculators if you're unsure.

http://www.the12volt.com/caraudio/boxcalcs.asp

Edited August 4, 2009 by nicr4wks

[Turk1]

Got a Multimeter?

Look's like the fosgates are dual voice coil by the double ohm listing, should be able to wire them down to 2ohm and get the output you're after from the amp.

Check out the wiring calculators if you're unsure.

http://www.the12volt.com/caraudio/boxcalcs.asp

Thanks for the reply.

You mean where it says "Nominal Independance: 4 Ohm / 8 Ohm" correct?

I think that means that the "4 Ohm" is for the RFR-1412 and the "8 Ohm" is for the RFR-1812.

That link looks pretty helpful...but I can honestly say I am confused just looking at it

[Turk1]

Anyone else got some suggestions?

[Joe Bellissimo]

That amplifier is far too weak to be getting the full potential out of either of those setups.

The Soundstream sub can be wired at 1 or 4 ohm which isn't what you want to do with that amp.

[Turk1]

Hmm so what sub should I be looking at to use this amp to its full potential?

[Joe Bellissimo]

You will want something that will run at a 2ohm load and take around 800rms.

http://www.vibeaudio.co.uk/products_global/spacecbr12/

One of those would be sweet