More Bass??

[MarkCG]

I built a pair of speakers with a .55cuft box. They have an Audax HP170Z2 6.5" woofer in them with a Morel MDT-20 tweeter. They are crossed over at 2500hz. They have a 2" diameter 5" long port in the back. They actually sound pretty good with voices and image great, but I was expecting a bit more bass extension.

Have I done something wrong?

Thanks

 

[chris229]

I built a pair of speakers with a .55cuft box. They have an Audax HP170Z2 6.5" woofer in them with a Morel MDT-20 tweeter. They are crossed over at 2500hz. They have a 2" diameter 5" long port in the back. They actually sound pretty good with voices and image great, but I was expecting a bit more bass extension.

Have I done something wrong?

Thanks

bass from ported 6.5? if you want more bass response you should build a rear/ front loaded horn

 

[SY]

I don't have the driver specs in front of me, but if memory serves me right and if you're using a sealed box of the volume you describe, you'll have an f3 of 70 Hz or thereabouts.

If you want bass extension with low distortion, think big boxes and big drivers.

 

[Jimmy154]

I think you have to wait for the speaker to break in. May take a few months or so. When I build my speakers, I though; I must have designed them wrong they have very little bass. After a few months, I lowered the tuning freq. from 43 Hz to 38 Hz (because of bass being to loud at 43 Hz) and then after a while I desided there was enough bass for me to stuff the ports with t-shirts.

And also I don't think even 10" subs have good bass and you have a 6.5" midrange. Not much you can do. Only time I thought I've had enough bass extention is with a 15."

 

[Redeye]

.55cu ft seems like quite a small vented box for 6.5" driver to me. You can lower the tuning of the port to get more bass, but you'll lose the flat frequency response at LF with a box that small.

I'm working on project with a 6.5" Vifa driver at the moment. My prototype cabinet was 20 litres (about .75 cu ft), which I'm going to reduce to 17 litres for the real thing. This goes down to -3dB at 48Hz, which i reckon is about as good as you can reasonably expect from a driver that size.

If you want to try and extand the bass response, buy another set of ports, start with them 6" long, then hack 1/4" lumps off until they sound like you want them to (you'll inevitably end up taking too much off, hence why it's best to buy another set of ports to play with). IMHO this is the best way to tune boxes anyway - if it sounds right to you then it is.