“ activate “ a JBL 4367

[meracus]

Mulling over the idea …. Is this a waste of time or a meaningful move
Has it been done with other jbl , thinking of a pascal / marani hypex etc
Thanks

 

[staticV3]

Is this a waste of time or a meaningful move

With the right tools and enough determination - definitely the latter.

Be prepared though. You'll tread the same steps as JBL engineers before, characterizing the speaker's performance and developing a suitable crossover.

Think gated close-mic'ing, ground-plane measurements, spin data etc.

Biggest target IMO would be reducing the directivity error at crossover by way of steeper crossover slopes:

Source

Personally, I'd use Hypex FA Plate Amps for this. Slick all-in-one solution with FIR support.

 

[meracus]

So maybe just EQ and leave passive and use best amps like mono benchmark and be done with it ?

 

[staticV3]

I can't answer that for you

 

[meracus]

thanks for that , you always been helpful and I command you for it
at the current state of affairs ,it’s difficult to listen to kit
I can tell you that almost none of the dealers ( I think none ) carry a 4367 … and I live in a 10m mégapole
Hence why I ask for genuine opinions , hence why I also “ hunt “ for kit sometimes across borders so I buy on “ constructive “ faith
I have also seen some complete M2 with amps and all for around 10-12k … might also be an option

 

[mjgraves]

Consider that JBL themselves sell the M2 as a system with Crown amps with DSP. I do wonder how it would work if you got the amp modules from the 708P. These are occasionally available. Probably no easy way to alter the xover point.

 

[Sal1950]

Be prepared though. You'll tread the same steps as JBL engineers before, characterizing the speaker's performance and developing a suitable crossover.

I'm pretty sure he could just plug in the crossover specs of the M2 and call it done.
There's a ton of info from people doing the same both around ASR and other sites
If you'd be gaining much in sound quality is debatable. Do some further homework and see what other have found.
Good Luck

 

[meracus]

Consider that JBL themselves sell the M2 as a system with Crown amps with DSP. I do wonder how it would work if you got the amp modules from the 708P. These are occasionally available. Probably no easy way to alter the xover point.

I’m I right in assuming you have an M2 ?

 

[Waxx]

The M2 and the 4367 don't have the same cabinet and woofer (2216Nd vs 2216Nd-1). they are close to each other, but they are not the same. So using the filter from the M2 won't be perfect (but probally already ok sounding). I would not use that as final dsp, but it could be a starting point to fine tune.

What you really need to do to make this work and be better than the passive is measure both drivers in the cabinet from different angeles and develop the dsp config with that.

Or you can do what my girlfriend does, she uses the 4367 as it is, but combined with a pair of custom diy subs and a minidsp with dirac. You won't fix the small issues with the crossover with it, but it's a lot easier while it still can be tuned to the room.

 

[meracus]

Thanks for that
For aesthetic reasons .. no sub is a more desirable option

 

[Waxx]

It depends on the music if you need a sub with those, for most the 4367 wil do it on it's own, but my girlfriend listen to old french rap a lot and they require a strong bass, there the 4367 is missing something that those two 18" subs can do (both are tuned to 25hz F3 with dsp). Also a lot of classic music requires more than the JBL can give on it's own. But the choice is yours, without sub, the JBL can cover most music fullrange, that is true. idem with the M2. The main difference in woofer is that the cone and spider of the 4367 are more tuned for a smaller cabinet and to go low without dsp eq, while the cone of the M2 is less fit for that and need dsp and a bigger cabinet to go real low.

 

[mjgraves]

I’m I right in assuming you have an M2 ?

I wish! I have 708Ps. No room for M2, even if I could afford them.

 

[meracus]

Seen the waveguide and jumped the gun
I have the 4329p … was looking at a kef for another room but. Not doable … I might be going down the 4367 /4349 /M2/K2 as a final chapter before investing in a mobility scooter
I really like the JBL sound , wasted a fortune in various bits of kit … i wish I knew
Currently on 18sqm room , but could be 35/40 sqm

 

[Ciobi69]

It depends on the music if you need a sub with those, for most the 4367 wil do it on it's own, but my girlfriend listen to old french rap a lot and they require a strong bass, there the 4367 is missing something that those two 18" subs can do (both are tuned to 25hz F3 with dsp). Also a lot of classic music requires more than the JBL can give on it's own. But the choice is yours, without sub, the JBL can cover most music fullrange, that is true. idem with the M2. The main difference in woofer is that the cone and spider of the 4367 are more tuned for a smaller cabinet and to go low without dsp eq, while the cone of the M2 is less fit for that and need dsp and a bigger cabinet to go real low.

Considering the cost of diy subs slowly at a time is fine too , i got 2 18 inch sub in my system they really reproduce effortlessy high dinamic range music

 

[mjgraves]

Curious observation. JBL themselves user certain product names kind of recklessly. For example; "4329P Studio Monitor Powered Loudspeaker System."

When in point of fact, these are consumer products. You will not find them in professional recording studios. In studios, you may find 70xP and M2.

That's not to denigrate them in any way. It's just an observation of the language used. I also find use of the term "Reference" arbitrary to the point of unhelpful. More an attempt at justification of price than assurance of quality.

 

[Salt]

Following @staticV3 : extract the crossover, insert a plateamp, start with the design of that passiv crossover and go beyond.
That would be my suggestion, needed is a Mic (Umic-1), some screws and, maybe, a saw ...

 

[Sal1950]

I really like the JBL sound

Same here. When I bought my HDI-3600's I was torn between them and a couple like priced Revels.
But the JBL horns won out.
Wish I had room or wallet for M2/4367s

 

[Sal1950]

The M2 and the 4367 don't have the same cabinet and woofer (2216Nd vs 2216Nd-1). they are close to each other, but they are not the same. So using the filter from the M2 won't be perfect (but probally already ok sounding). I would not use that as final dsp, but it could be a starting point to fine tune.

They would definitely get you in the ballpark, much easier than flying blind.

 

[meracus]

With the right tools and enough determination - definitely the latter.

Be prepared though. You'll tread the same steps as JBL engineers before, characterizing the speaker's performance and developing a suitable crossover.

Think gated close-mic'ing, ground-plane measurements, spin data etc.

Biggest target IMO would be reducing the directivity error at crossover by way of steeper crossover slopes:
View attachment 467330
Source

Personally, I'd use Hypex FA Plate Amps for this. Slick all-in-one solution with FIR support.

Mistakenly went ahead and imported a 4365 … what a disappointment this was

 

[DSJR]

The 4367 is so much better (imo) than most domestic boxes anywhere near that price level, I'd almost be cheeky and ask "Why bother?" I remember it having a wonderful 'big hearted' sound which may well be a bit too much in a UK domestic situation (the truly ancient 12" three-way L65 Jubal didn't though ).

Thing is I suppose, the fully active Neumann KH420 at little more than half the price, may do it better, despite the looks and smaller bass driver...