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shallowrockford
05-30-2013, 10:37 PM
Ok so I'm working with VERY limited space as I am fitting a 10" sub under the seat in my boat. The biggest I could make the box was 19" L x 13" W x 5" H. I used 3/4" MDF so subtract 1.5" from that. The sub I bought is a shallow one.


Rockford Fosgate R2 R2SD4-10

Specifications:

Size: 10-Inches
Nominal Impedance: Dual 4-Ohm
Voice Coil Diameter: 2" (50mm)
Magnet Weight: 45 oz. (1.28kg)
Speaker Connector: Dual 12-Gauge Compression
Re: 6.60-Ohms
Le: 4.2mH
Qms: 7.00
Qes: 0.81
Qts: 0.73
Vas: 21.7 (Liters)
Sd: 333 (cm2)
Xmax: 8.0mm
Frequency: 39.3Hz
Sound Pressure Level (SPL): 82 (dB at 1w/1m)
Cutout Diameter: 9.125 Inches (232 mm)
Mounting Depth: 3.417 Inches (86.8 mm)
Woofer Displacement: 0.037 Cubic Feet (1.05 Liters)

Will this sub work well with my sealed box?

nvturbo
05-30-2013, 10:43 PM
The box enclosure should be about .737ft^ of space (including the displacement of the sub). However, the box you made is about .41ft^. Either get a different sub or make a larger box.

USE THIS:
Rockford Fosgate® - RFTECH Support (http://www.rockfordfosgate.com/Support/rftech.aspx#boxadvisor)

shallowrockford
05-31-2013, 02:36 AM
what would the negative effects be from using this box? I cannot make it any bigger.

NIHL8ION
05-31-2013, 02:59 AM
you are roughly .3^ft. shy of what you need for that sub, odds are it will emphasize a higher frequency range than it normally would in the proper enclosure... In other words it will make the sub "peaky" and won't hit the lower notes as well...

Mitch86
05-31-2013, 03:07 AM
If that's absolutely as large as you can go, use some polyfil in the enclosure. The sub will perform as if its in a larger enclosure.(from what I understand) There are charts to tell you how much to use or maybe someone with more knowledge on the advantages of polyfil can chime in.

NIHL8ION
05-31-2013, 04:43 AM
yes, polyfill will help, but there is no amount you can fit into .4^ft. enclosure that will make it .7^ft., that's nearly double the size, it's just not possible... Also be careful as being in a smaller enclosure will already have your sub running hotter than usual and polyfill increases this effect so it will run even hotter yet... Your sub will also be more power hungry for the same output as you would see in the larger enclosure with less power, so be mindful of this. If using polyfill make sure it can not contact the sub at all or you could potentially have a fire issue if it gets hot enough...

treesive
05-31-2013, 08:23 AM
yes, polyfill will help, but there is no amount you can fit into .4^ft. enclosure that will make it .7^ft., that's nearly double the size, it's just not possible... Also be careful as being in a smaller enclosure will already have your sub running hotter than usual and polyfill increases this effect so it will run even hotter yet... Your sub will also be more power hungry for the same output as you would see in the larger enclosure with less power, so be mindful of this. If using polyfill make sure it can not contact the sub at all or you could potentially have a fire issue if it gets hot enough...

Agree. You are almost half the size you need to be. The box will not dig very low at all and no amount of polyfill will be able to be stuffed in there to increase it enough to fix it. If you had say a 1.75ft^3 box and needed it to be 2ft^3 you could "trick" trick the sub with polyfill but not if you needed a 3ft^3 box if that example makes any sense.

Chriszle
05-31-2013, 08:31 AM
Will it work? Yes. Will it sound good? No. Would I recommend it? No.

shallowrockford
05-31-2013, 11:42 AM
Well shoot. Does anyone know of a shallow 10" that will work in this box and sound good? With a minimum of 200w rms

treesive
05-31-2013, 11:51 AM
deleted

shallowrockford
05-31-2013, 07:12 PM
Well the subs came in the mail today and after reading the installation manual it says the recommended sealed enclosure volume range is .50 to .75 so I think I will be close enough.

mark32
06-05-2013, 01:21 AM
Ok so I'm working with VERY limited space as I am fitting a 10" sub under the seat in my boat. The biggest I could make the box was 19" L x 13" W x 5" H. I used 3/4" MDF so subtract 1.5" from that. The sub I bought is a shallow one.


Rockford Fosgate R2 R2SD4-10

Specifications:

Size: 10-Inches
Nominal Impedance: Dual 4-Ohm
Voice Coil Diameter: 2" (50mm)
Magnet Weight: 45 oz. (1.28kg)
Speaker Connector: Dual 12-Gauge Compression
Re: 6.60-Ohms
Le: 4.2mH
Qms: 7.00
Qes: 0.81
Qts: 0.73
Vas: 21.7 (Liters)
Sd: 333 (cm2)
Xmax: 8.0mm
Frequency: 39.3Hz
Sound Pressure Level (SPL): 82 (dB at 1w/1m)
Cutout Diameter: 9.125 Inches (232 mm)
Mounting Depth: 3.417 Inches (86.8 mm)
Woofer Displacement: 0.037 Cubic Feet (1.05 Liters)

Will this sub work well with my sealed box?

I am in stereo car sound system business for over years and according to your requirements, yes it is perfect for your sealed box.