Connecting a sub to a monoblock

dastasha · Post by **dastasha** » Sat Nov 12, 2005 2:48 am

Hi there.

I just bought a MTX RT251D monoblock amplifier to power my 12" Sony X-plod sub in an enclosure. My question is, do I just connect the sub to the terminals marked speaker 1 or do I connect to speaker 1(-) and speaker 2(+) and join speaker 1(+) to speaker 2(-) terminals.

Does the amp work ok 'unbalanced' like this? Dont tell me I need to run two subwoofers. The manual is not so clear on the connection of one speaker.

Thanks

ridr4lif · Post by **ridr4lif** » Sat Nov 12, 2005 2:19 pm

Im assuming the sub is a dual voice coil?

Check out this site http://www.rockfordfosgate.com/rftech/wiringwizard.asp to figure out how to wire it. Just plug in how many subs and what the voice coil combination is, and you should be all set.

If you have any problems, feel free to post.

dastasha · Post by **dastasha** » Sat Nov 12, 2005 3:37 pm

Thanks for the reply.

It doesn't say in the manual whether I can bridge the amp - I didnt want to risk it without independant advice.

Doesnt matter now anyway. I connected to speaker 1 and it works fine.
Plenty of power there. Have to use 0dB bass bost and set gain to about 20%.
Plenty of noise for a tiny Suzuki swift!

_________________________________________

1986 Suzuki Swift
Kenwood KDC-4029G - Kenwood 5" fronts
Sony X-plode 12" in a small sealed enclosure
MTX Road Thunder RT-251D 250WRMS amplifier
(6x9's yet to be installed as rear spkrs)

Thanks, Darren

ridr4lif · Post by **ridr4lif** » Sat Nov 12, 2005 4:43 pm

You said in your first reply that its an MTX monoblock amp. There should only be one positive and one negative terminal. I think the MTX amps are stable to 2 ohms, so just make sure you dont wire down lower than that.

smoker · Post by **smoker** » Sat Nov 12, 2005 5:01 pm

if there are two they are joined together internally