Why bother with FRs?

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The TC9FD seems to be a winner. I just happened to measure one lately. Good to see that both our measurements match nicely. Looks like amateurs like us can produce good data without the need for an anechoic chamber or professional measuring software and microphones!

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Yes, it's great to see confirmation of the TC9FD by someone else. Your measurment is very similar and the polar response from 0 to 30 deg is confirmed to be quite good.
 
pnix, how about getting a ''fullrange'' driver like some supravox offering that naturally starts to rolls of around 7-8-9khz then simply add a little super tweeter?

Been there and done that with the Planet10 EmKen beta - Eminence Beta 12LTA + FT17H

IF I were to go 'assisted fr' again, I'd go with a 3 or 4" FR driver crossing to bass support.

Comparing my Emkens to '2 way HiFi' speakers is a none event.
First thing they got put up against was a pair of mid size 'recent' B&W floorstanders and the Em's got the bottoms handed to them.

Tannoy 10" HPD NFM's kick their bottoms too, as do 8" 609's, as do a pair of £120 Tangent 'orange box' matchbox monitor things my mate uses as rears in his 'HT'.......
But their big and fun and get taken to parties, where they get driven "Too Loud - Turn it DOWN!" by domestic amps of ALL types, dont break, am not bothered if some ones head wipes out the main cone in an 'accident'......

The drivers like 12LTA are PA drivers, remember this AND how cheap they were and you wont go far wrong.

If you dont think you can remember their origin, dont bother cos you'll be 'self snake oiling' yourself to disappointing climax...........😉
 
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can you please show me the measurments of a well setup fullrange based system that is able to correct those issues with BSC that result in flat FR from at least 150hz to 5khz?

EQ is not a option. it messes with phase and adds all sort of problem.
your speaker must be flat to begin with.
and then use small EQ like 2-3db.
Eq ing a speaker just to make it flat with 5 db shelves is unnacceptable, no?

Here is one of my full range speakers, a dual chamber reflex (DCR) with a BSC circuit that is +/- 3dB from 55Hz to 20kHz. Uses a $12 Vifa TC9FD. At moderate levels for near field listening (what I made them for) the sound is quite nice - relatively low distortion over the whole range, very full, very balanced and not lacking any frequency range.

More info here:
http://www.diyaudio.com/forums/full-range/252627-viva-la-vifa-curvy-cabinet-dcr-tc9fd.html

Freq response:
405849d1394805227-viva-la-vifa-curvy-cabinet-dcr-tc9fd-dcr-vifa-bsc-rew-hd-3in.png


Here is the phase which is +/-30deg from 200Hz on up great for imaging and soundstage.:
405766d1394763138-viva-la-vifa-curvy-cabinet-dcr-tc9fd-dcr-vifa-bsc-freq-phase-meas.png


Here is the impulse response, doesn't get much better:
405768d1394763138-viva-la-vifa-curvy-cabinet-dcr-tc9fd-dcr-vifa-bsc-ir-meas.png
 
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can you please show me the measurments of a well setup fullrange based system that is able to correct those issues with BSC that result in flat FR from at least 150hz to 5khz?

EQ is not a option. it messes with phase and adds all sort of problem.
your speaker must be flat to begin with.
and then use small EQ like 2-3db.
Eq ing a speaker just to make it flat with 5 db shelves is unnacceptable, no?

Serious EQ on a (semi) full range speaker messes with phase. But DRC can put it back to normal if carefully applied. see:
Impulse response right channel, no EQ:
right%20impulse.jpg


Impulse response after EQ:
right%20impulse%20with%20eq.jpg


Impulse response with EQ and DRC convolved signal:
right%20impulse%20with%20eq%20and%20convolver.jpg

Impulses taken at listening position in a live (living) room. No reflection free zone.
 
ok thanks guys.
but then, how does it sound?
Ive been so dissapointed with my 2 fullrange based speaker that I give up totally. the only system I could have lived with based on a fullrange was the ref 3a decpo but it use a tweter around 6khz I think
 
ok thanks guys.
but then, how does it sound?
Ive been so dissapointed with my 2 fullrange based speaker that I give up totally. the only system I could have lived with based on a fullrange was the ref 3a decpo but it use a tweter around 6khz I think

How much money do you want to spend?
What dispersion characteristics are you looking for?
How loud does the speaker need to go?

The answers to these three questions pretty much determine the speaker concept you should be looking for.
 
Seriously, I would say everything was better on the ref3a if I compare alpair to ref3a decapo be. Id say its very not a fair comparison. from high to low, imaging, the details, dynamics, tone ect is much much better. its like going from low fi to mid fi honestly.
I have to say that the ref 3a is a stunning speaker and considered a msaterpiece by many, so not very fair comparison. the imagin and detail retrieval combine with powerful bass and very detail highs makes the ref 3a a very good speaker.
but is it fair to compare a 3k speaker with 300$ speaker?

even my salk continuum is a step up compared to the alpair. the alpair was better then the fonkens fe 127 though.
 
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Well Murph, the smallish BR design I've seen wouldn't be my first choice for the 12P, so you may not yet have heard its full potential - but it sounds like you've made your mind up, for now.

I've heard an earlier version the de capo, and aside from lack of the deepest bass extension that some might want for full throttle THX reference level or 32ft pipe organ recital work, they are an excellent musical device - just a bit more than I'd care to spend these days.
 
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