Doing some quick math shows me the enclosure is around 7.1 cu.ft. NET with a dismal port opening (only 42.5 sq.in. of port area). The port area isn't even equivalent to a pair of 6" round ports. However after subwoofer displacments the BL's would be running in around 6.7 cu.ft. with a port tuning in the 29hz area. So technically speaking, yes the enclosure should be alright to run the BL's in until you get another enclosure built for them. Remember though that when you increase the port area on the new enclosure that port length will have to be much longer as well to keep the tuning the same, or nearly the same. That means that a lot more internal volume is going to be used up by the port and the enclosure will have to get a bit larger to keep the volume where it needs to be.