Add base to marine system

floyd67 · #1 03-07-2011, 09:36 AM

I have a JBL MBB2 Marine receiver.
Specs can be found at http://www.deanelectronics.com/index...&productId=139
This receiver has 4x45 watt amplifiers, powering each of the available speaker channels (FR, FL, RR, RL)
I believe the 4x45 watt channels have a speaker impedance of 4 ohm's.
This receiver is currently being used for my hot tub stereo system and was installed by the hot tub manufacturer.
Currently the FR and FL channels are being used for the top mounted speakers on the hot tub.
I am wanting to add a little base to my hot tub sound.
Wondering if the 2 rear speaker channels (2x45) would be enough to power the 8 inch marine passive tube subwoofer, Bazooka Model: "MBT8014".
I know I could add a powered sub-woofer connected to the pre-amp outputs on the receiver, JBL had supplied this option, but then I would have to draw power from the hot tub or an external source,
and was trying to get around having to do that by using a passive sub-woofer instead.
Other goal stream was to not spend too much money, work with existing system if I can, rather than upgrading to buy new amplifier, power supply, etc.
Not looking to add ground shattering base to my hot tub, just looking to add a little base to my hot tub experience.
I would be looking to mount the sub-woofer base tube in the hot tub enclosure and have the base emanate through the water.
If there are other options or other configurations that might work better for what I am doing, or if what I am trying to do is just not possible, any help would be appreciated.
Thanks very much for any help!

heavyduty · #2 03-08-2011, 04:57 PM

Quote:

Originally Posted by floyd67

I have a JBL MBB2 Marine receiver.
Specs can be found at http://www.deanelectronics.com/index...&productId=139
This receiver has 4x45 watt amplifiers, powering each of the available speaker channels (FR, FL, RR, RL)
I believe the 4x45 watt channels have a speaker impedance of 4 ohm's.
This receiver is currently being used for my hot tub stereo system and was installed by the hot tub manufacturer.
Currently the FR and FL channels are being used for the top mounted speakers on the hot tub.
I am wanting to add a little base to my hot tub sound.
Wondering if the 2 rear speaker channels (2x45) would be enough to power the 8 inch marine passive tube subwoofer, Bazooka Model: "MBT8014".
I know I could add a powered sub-woofer connected to the pre-amp outputs on the receiver, JBL had supplied this option, but then I would have to draw power from the hot tub or an external source,
and was trying to get around having to do that by using a passive sub-woofer instead.
Other goal stream was to not spend too much money, work with existing system if I can, rather than upgrading to buy new amplifier, power supply, etc.
Not looking to add ground shattering base to my hot tub, just looking to add a little base to my hot tub experience.
I would be looking to mount the sub-woofer base tube in the hot tub enclosure and have the base emanate through the water.
If there are other options or other configurations that might work better for what I am doing, or if what I am trying to do is just not possible, any help would be appreciated.
Thanks very much for any help!

Welcome to the Bazooka Forum. Before you even think about going this route you need to find out if channels 3 and 4 of the unit are capable of being bridged. If they are, you may be on to something here. Consult the owner's manual and post back with what you find out.

floyd67 · #3 03-10-2011, 07:12 PM

I checked the manual and consulted with the manufacturer. None of the speaker channels are able to be bridged.

heavyduty · #4 03-21-2011, 02:16 PM

Quote:

Originally Posted by floyd67

I checked the manual and consulted with the manufacturer. None of the speaker channels are able to be bridged.

If the area you are wanting to mount the Tube stays dry you may want to consider a pair of BT6014 to run off of each channel. You would need to purchase a passive low pass crossover and you'd be set.

floyd67 · #5 03-25-2011, 09:38 AM

Thanks for your help, this is just what I was looking to do. Not too worried about moisture as the hot tub enclosure stays dry, and there is other electronics in there that is not marine grade.

Do you have recomendations for a passive low pass crossover that I could purchase for this purpose and system?

Would I need 2 crossovers for each of the base tubes or would one suffice?

heavyduty · #6 03-25-2011, 11:45 AM

Quote:

Originally Posted by floyd67

Thanks for your help, this is just what I was looking to do. Not too worried about moisture as the hot tub enclosure stays dry, and there is other electronics in there that is not marine grade.

Do you have recomendations for a passive low pass crossover that I could purchase for this purpose and system?

Would I need 2 crossovers for each of the base tubes or would one suffice?

Any 12db slope low pass crossover will work, ideally no higher then 100hz. You will have to purchase either one, two channel crossover or two, one channel crossovers.

I'll be sending you a PM with a link.