Tom.F.1

iTrader: (1)

This is my attempt at a box design for a CVR15.

Does it need anything? Braces or sizing? Its going to be venered MDF, trimed in Oak. It for the home theater.

Thanx,

Tom

jalat

iTrader: (6)

cubic footage?
tuning?

Tom.F.1

iTrader: (1)

Here is an updated .pdf

I made it a little bigger and added some braces on the port. I'm thinking of adding an X brace immediately behind the magnet.

The VR manual says compact enclosure 3ft cube, maximum (SPL/DeepBass) 5ft cube. I took the port area/length from the Deep Bass and the volume is 3ft, so its a combo.

Will it work or am I out in left feild? Its a lot bigger than the generic boxes available.

jalat

iTrader: (6)

looks alright. 3 cubes should be good for a 15" i'd just suggest tuning in the low 30's

johnw

iTrader: (4)

For HT use I would tune lower, from the second diagram you are tuned to about 38hz, WAY TOO HIGH for HT, you want to be tuned at arund 20-25hz, problem is with that box and that port size 25hz tuning will require the port to be 61" long! Make the box about 5cuft and the port 2" x 17" and 25" long this will tune to 25hz.

jalat

iTrader: (6)

hmmm really that low? i'm not disagreeing, i just never thought it was nessesary to tune that low, i thought something like 30hz would be enough

Tom.F.1

iTrader: (1)

I found some box and port calculators!!

I made the port narrower and longer and got it down to 33Hz. I think its godd enough, i don't have room for a bigger box.

kevmurray

Are these more or less going to be in the corners of the room?

Tom.F.1

iTrader: (1)

yes, more or less

kevmurray

Then you could try larger sealed boxes and port them later if you wish. The corner loading will reinforce the low end like a horn. If you decide later that you want more low end you could port the enclosure. With the low resonance frequency of your 15's (~21 Hz) you should have no trouble getting low bass. You'll just have to keep in mind when you choose a sealed size that you may add ports in future. I'd tune for between 24 and 30 Hz. If 33Hz is your size limit then give it a try, you can always redesign and build new boxes. It's part of the fun of this hobby.