Ultimate kick bin?

Do we know what the ultimate driver/design combo is yet? As time goes by with the advancement of drivers and cabinet design surely something must stand out overall?

Martin F2B. don't know if anyone did ever manage to get some plans drawn for them - been discussed several times on here over the years.

Megaton em15 for me. Sounds very warm and smooth. But still hard hitting. It’s a BPH , looks very much like turbosound bph238.

snowflake wrote: Martin F2B. don't know if anyone did ever manage to get some plans drawn for them - been discussed several times on here over the years.

At least two forum members have the (real) plans, but I don't think they have been widely published.

RealitySound wrote: I can't find much on the F2B as far as plans (as you said) Surprising, considering how old it is.

The trouble is, as I have mentioned in another thread, that this is a very difficult box to build. As well as the plans, you need a couple of people with plenty of expertise in building tricky cabinets. Plus ideally a CNC machine to do all the rebating, although the originals were built in a woodworking factory equipped with Wadkin copy routers (the ones where you follow a jig on a pin) and full size dimensional saws plus all the usual air tools.

You also need to be willing to make at least one sacrificial prototype box (built screwed but not glued) to find out what needs to be tweaked to make everything fit together properly. And you really need to borrow an original cabinet as a reference to visualise how it all looks when complete.
Bear in mind that 19mm plywood has a tolerance of 1mm or so, which means that the cutting dimensions, rebates, etc have to be referenced to the centre line of the cabinet (as they are on the original drawing). It's all quite fiddly to get right.

The boxes have to be properly screwed as well as glued, otherwise they will eventually develop rattles. Pilot holes for the screws are drilled along the rebates in the two main panels before assembly. You can find out where the screws are in an original box without having to strip the paint, by feeling for them with a small magnet held in the fingers like a pencil. This will also find some staples - they were used to hold some parts in place during the very complicated assembly, which has to be done quickly before the glue starts to go off.

The first part of the horn flare uses a couple of pieces of softwood, each cut to a specified profile. Everything else is in 19mm plywood, except for the baffle which is made in two parts (both 15mm if I remember right).





Edited by madboffin - 02 May 2020 at 5:22pm

APC321 wrote: 19mm ply?

Edited by concept-10 - 02 May 2020 at 6:34pm