How to: Fast/Natural Bass?
I have been working on a project for awhile and I am approaching satisfaction. I am using an Altec 414c with a large Ess Heil air motion transformer. Imaging is not great due to the relative sizes of the drivers (12" & 7") but nothing the fans here are not used to! This is a dynamic and sweet sounding, very "fast" system. I am missing the bottom. I would like to go Three way - 3db at 35hz so essentially flat for the vast majority of music. I like rock and classical and will sacrifice the Home Theater shake for music. I love great transients, both attack and decay as well as a natural sound. I must keep the box below 12 cu.ft. and ideally between 5-8cu.ft. For the next five years or so I will be in a modest 14' x 17' room, open to another smaller room as room loading and distance usually enter the equation. Researching here many believe a horn loading is the way to go but I may have issues with stacking my 20" high mid/high combo on top- keeping the center of my tweeter about 42" high from the floor minus 16-1/2" leaves max 25-1/2" in the vertical dimension. While I can treat the bass as a sub and go beside, it would be nice to stack and save floor space. Also, it will likely be easier for me to build a 1/4 wave t-line than a horn as I have no experience with making a horn or for that matter a port. I have considered the Altec 416c but it may need a really big box. I have also considered a Jbl 2234H (a 2235 without the mass ring for more speed) and cross somewhere between 80-150hz. but that is quite flexible- what counts is integration and bottom! Suggestions? :banghead: Many thanks!
And I am not stuck on -3db @ 35hz either. I just wanted to go flat to 40hz before roll-off begins, the common rock and roll bass limit.
My room is 14X17' with a double wide door on the long side & one on the end.
For bass I have two JBL loaded home made "K" horns, works very well.
My setup in on one of the 14" ends is your like this or on the other wall?
There are plans available for different kinds boxes, reflex and horn. But you have stated a lacked of experience in box construction, do you know anyone that can help you with this?
The actual size of the box depends on the speaker used, some work better in a 3~4 cu ft box. Bass horns sound great, BUT they are very large. One of the smallest Bass horns is the JBL C40, the box that makes up the horn is about 8 cu ft in size. There are many things to consider, many bass players use 4-10" speakers they feel that the small speaker gives them faster response. May be a box with dual 12" would give you what you are looking for, but you would have to build it.
Bass boxes show up on eBay, but the cost of shipping can be more than the cost of the box.
The other choice is to but a good sub woofer, and use it until you move.:(