Chienmortbb

Sorry for some reason my computer keeps posting twice.

Its not as bad as some but you can hear it in a home setting.

I agree but the fan is not quiet on mine. Look out for how to quieten a fan thread soon. I wonder why no one has a stage/studio switch like some amps had in the past?

Back on track(ish). I still have one Beyma 12CVM2 12" driver, suitable for this Easy Build 12" Cab.

@Phil StarrI have not modelled it in such a small cab, and having a bigger magnet, voice coil it may be too heavy but is that a good project for the Fane 10-300?

I am sorry for sending this thread off track so this will be my last contribution on posts (at least until the next time). Those RCF speakers are excellent as are many others without round ports. I would happily use those if supplied at a gig for FOH applications and I know a number of people on here and Talkbass use them for backline/monitoring successfully. However for this project the round port is both easiest to implement and gives the best result.

What model is it?

I have just been reading an 11 year old thread on Talkbass about this very problem. Markbass and others including the Music Tribe group (Behringer, Bugera, TC Electronic, TC Helicon and more) will only give service manuals or circuit diagrams (schematics to our friends over the pond) to authorised Service Centres. Now there is a nasty rumour that class D amps and SMPS power supplies cannot be fixed. They are harder but this is bullshine. Even my 70 years old eyes can see surface mount components and remove and replace them without a great deal of trouble. So I just made the decision to avoid MB and Music Tribe in future. Small problem here in that I have a Bugera Amp but that will soon be relegated to spare. I used to work for Panasonic UK and you could buy a Service Manual for a few pounds. Anyone not just an Authorised Service Centre.

Every cloud has a Hi Ho

Actually no one is a no one.

According to Duke Le Jeune, a respected designer of bass cabinets, cone rock only occurs if the port is directly behind, but off centre, to the driver. In one of the threads in Talkbass he goes into detail about he got, and solved the problem of cone rock, with the help of Eminence's technical department. This is opinion. Corner ports are a type of slot port and they break several of the conventions. Firstly as @Phil Starrhas already mentioned, @steviehas demonstrated to me and @Phil Starrthat a single large round port is better than several small ones*. There is no good reason to suspect that this is not true of multiple corner ports. So why do people use slot or triangular/corner ports. Firstly they act as bracing and secondly they negate the need for an expensive moulded port**. Remember that the wood that creates the slot or corner port is effectively an offcut of the main cabinet panels or a much cheaper material. *This was why the Mk3 version of the BC112 cabinet had one large port instead of four on the MK1. ** A part costing £1 at manufacture will probably end up £3-4 on retail price.

All my life I have been a no one until Basschat gave me a badge. Keep the badges.

I think you should find the ELF enough with two cabs but it might struggle with a single cab.

Looking very good.

Don't sand it. Put the port in the freezer, it will contract, then slip it in the hole and as it heats up it will form a tight fit.

Discussions about ports seem to be contentious so here goes. While a corner facing rear port in subwoofers may have a higher/different output a moved closed to the corner, it is a matter of taste as to whether it is better or not. In my experience of playing pubs and clubs in the UK, a rear firing port makes it much harder to get a balanced sound when placed close to a wall or in a corner.

On the Basschat BC112 MK3 the energy from the port really is trouser flapping but I suspect that is something I can feel rrather than what most people could hear.

This puts into words exactly what I was thinking, Nothin' fancy, just a solid foundation for Billy Gibbons to work over. However that in itself is a gift, I know how hard it is to keep it simple, even when a song is just root and fifth, I struggle not to put a fill in. RIP Dusty.

I have only been on the periphery of @stevieand @Phil Starr's designs so I cannot make definitive comments* however that one thing I have learnt is that you cannot design a cabinet purely by modelling and that the traditional "rules of thumbs" similarly should be used for guidance. One thing you can be sure of is that the designs that are published are rigorously tested and measured then gigged to ensure that they meet the original design criteria. Of course there are small compromises, there is always a little more that can be gained by making the box bigger, a more expensive driver but in many cases the extra is not worth the extra. * I do lay claim to the phrase "squeezing the balloon" when describing how changing any on parameter of a design affects many others>