Help getting more high end/high mid

Ditch the cabinet and build a fearful.




Well, you did ask

 

Keep the cabinet and build an RCA/Altec/Vitavox 15 cell horn out of wood.
It comes in as low as 300Hz and you can get as much as 111dB 1watt 1metre dependant on driver, so you will need an LPad in the crossover.
Of course a fearful is very good if you have a very powerful amp? or don't like how loud a hundred watt tube amp goes into an efficient loudspeaker.

 

you could build a top box with something like an 8" mid driver and a horn, but honestly, you're better off ditching the bag end 18 and getting a good full range speaker.
there are scads and tonnes to choose from.

 

The S18d is 101dB SPL a fearful 15/6/1 is barely 95dB SPL if you take into account inductor losses, my maths makes that a drop of 6dB SPL where 3dB represents twice or half the power in watts, so how many watts would you need to equal the volume of the bag end exchanging it for a fearful?.
Simple question often ignored here.
A V4b in my experience is marginal with a loud drummer, unless paired with its original staggeringly efficient (by today's standards) 2x15 Altec folded horn.
I rest my case m'lud.
PS Eminences best 8" mid won't quite match the bag ends efficiency if you ignore crossover losses.
http://www.lean-business.co.uk/esho...9L_yF7guMtLtqElswCqEf-7CavTNP-YVXcaApb_8P8HAQ

 

@Bassmec, you do realize that my "get a fearful" comment was tongue in cheek due to the OP?

I am not syaing he shouldn't, but by no means should I be the one to reccommend doing it seeig as I haven't even played one.

A Barefaced on the other hand...

 

Righto! A Barefaced super 15 would be an equivalent sensitivity wise.

 

I think a BB2 would be the way to go, I sold my compact due to lack of hf.

 

OK a BB2 is 97 so at the same time he would need to change the V4b for a Reeves 225 or Mesa Prodigy to get the same apparent level.
Maths is not a strong point round here is it.:-(
The OP said he wanted more of something not less of everything as far as I remember the question.

 

Well a big twin 2 then, my point was that a super 15 still won't offer the top end, it may be slightly better than the bagend. Sensitivity aside, the BB2 will go louder than the bagend before breakup due to excursion.

 

an EA wizzy 10 has 101db sensitivity, but it farts out before it's too loud in your living room, more maths required

 

Too right so let's try 1+1=2 EA wizzy's which gets you 104dB sensitivity due to +3dB coupling effect.
Some people managed to do really hard maths in the 1960's like counting all the way up to 8 times 10" in order to make the most out of very expensive valve technology but they cheated by having 6 x 6550 tubes and 300watts RMS.
We only have a third of that wattage, so how many similar 10" speakers do we need to get the same loudness?.

 

Eminence specs say 98.4 sensitivity for the 3015LF. And the most common mid that's used is the 6ND410. 102 sensitivity. Curious, where'd you get 95 for the cab? Add to this the 3015LF's displacement & you arrive at a very popular unit. These boxes are beasts.
http://www.eminence.com/pdf/Kappalite_3015LF.pdf
http://www.eighteensound.com/PRODUCTS/Products/CatID/13/ProdID=64#.VJpjmrg7yA

 

Barefaced Super 15 is enough with 100w. Greenboy Dually is equivalent.

 

^^^

Enough for what? I know both boxes are top tier. And I'm sure they both sound great w/100 watts. But I'm also sure they'd both prefer to be pushed by a lot more .

 

Enough for playing gigs, any size. They aren't cabs that need speaker breakup to sound good, so the 'pushed' thing doesn't really apply.

 

There's also the BFM Jack. Plenty of mids/highs and more sensitive than anything listed above except the "original folded horn 215".

 

Switch to GK amps and GK cabs with 10's or 12's....thier speakers are bright and clear on the top end.. enough to not even need a horn/tweeter IMO.

 

This is a good read: http://www.notreble.com/buzz/2014/12/10/bass-cabinets-on-speaker-sizes-and-pairing-them-up/

 

I know that, I also know about average insertion losses in ferrite core inductors, versus air cored inductors and Lpads in circuit with midrange units and tweeters, used to obtain a flat frequency response by sacrificing sensitivity and how to design passive crossovers in general and why active crossovers are effectively the only way of transmitting the full output power of an amplifier to a voice coil.
I am also not going to assume that the inductor in circuit with the 3015LF in this case, is air cored or it would be the size of a large mig welding reel, wound in about 8 kilos of 10mm2 oxygen free copper.
So the question still remains as to why one would use a driver and crossover designed for 600watts
when the design brief is for 100watts.
Inherent Redundancy is only a good idea up to a certain point.
IE Kenilworth road wheels and tyre loadings may not be ideally sutable for formula one cars.