PMC Drivers

Agreed

But the tranmission line dimensions/shape and stuffing are unknown. All you have is the length.

Then you have the crossover's which again, is an unknown quantity.

In the end you may just have a pile of expensive drivers. There's far more to a speaker than just the drivers and PMC will have gone to meticulous lengths to measure distortion, amplitude etc. for the best XO points, then tweaked out by ear. On top of this they will have built a good few test cabinet and tried a whole variety of stuffing schemes which yield the best bass response. And that's just a couple of examples of the processes they will have gone through.

So you may have a look-a-like but sound the same? I don't know. If your spending that kind of money you need to be sure you can do the whole thing justice.

True, it is a genuine & sensible concern.

Just the same as any design of speakers. In other words, the same concerns that ALL the speaker DIYers out there had when they came up with their now sometimes well-known designs.

You make a cheap cabinet from MDF and you experiment.
When you consider the cost of an MB2, a BB5 or even just an IB1, then it'll be well worth the investment if you pull it off to just a fraction of the original's quality. I paid less for all the cars i have owned (put together) than what a pair of MB2 cost...
 
A guy from PMC officially assured me that the 3" dome mid of the more expensive models (IB2 and up) is neither an ATC, which I knew, nor is it a Volt VM752, which I assumed it was, but an in-house design manufactured by PMC themselves.

The woofers look like Volt Radials with ATC cones but I think you can get close enough with regular Volts.
 
It really is extraordinary the effort and time that goes into developing these packages - the enormous amount of processing time and prototyping, including the mistakes and the 'just not quite right' trials would see most of us walk away from the projects long ago

And this doesn't take into account the ability and the knowledge that's required.

As the techniques, designs and the theory behind it become better known over the years, we can all benefit from it in out own more humble efforts
 
Agreed

But the tranmission line dimensions/shape and stuffing are unknown. All you have is the length.

Then you have the crossover's which again, is an unknown quantity.

In the end you may just have a pile of expensive drivers. There's far more to a speaker than just the drivers and PMC will have gone to meticulous lengths to measure distortion, amplitude etc. for the best XO points, then tweaked out by ear. On top of this they will have built a good few test cabinet and tried a whole variety of stuffing schemes which yield the best bass response. And that's just a couple of examples of the processes they will have gone through.

So you may have a look-a-like but sound the same? I don't know. If your spending that kind of money you need to be sure you can do the whole thing justice.

A guy from PMC officially assured me that the 3" dome mid of the more expensive models (IB2 and up) is neither an ATC, which I knew, nor is it a Volt VM752, which I assumed it was, but an in-house design manufactured by PMC themselves.

The woofers look like Volt Radials with ATC cones but I think you can get close enough with regular Volts.

Not surprised. Luckily im sure there are lots of drivers out there that will do almost as good, if not better. We can be sure that they spend less than we will on the drivers.
Getting somewhere near their performance will be good enough for me.
 
It really is extraordinary the effort and time that goes into developing these packages - the enormous amount of processing time and prototyping, including the mistakes and the 'just not quite right' trials would see most of us walk away from the projects long ago

And this doesn't take into account the ability and the knowledge that's required.

As the techniques, designs and the theory behind it become better known over the years, we can all benefit from it in out own more humble efforts

Im sure you are right.

Luckily, im a stubborn son of a b•itch.
 
The IB2S uses PMCs own mid, they are made in house by PMC in Luton.

The closest thing available is the Volt VM752 which costs a bit more than the ATC mid.

The IB1S uses the Scanspeak D7608/920010 as far as I can tell which is substantially cheaper.
But then IB1S cost half as much as IB2S.
 
Just get a ATC mid as it is close enough.You dont need a ""S"" version and if your doing a IB1,You donnot even need the ATC as the cheaper Vifa or SS mid will work.I found the IB2 to be a bit MID heavy but the IB1 was a more balanced sound.The mid was better in the MB2 for bass/mid ratio.
 
Thanks. The ATC is too pricey IMO, some brands only produce very expensive drivers, yet when you look around you can find great drivers from 10$ upwards if you are lucky & know where to look. The Peerless 850443 would be the perfect example : flat, very low distorsion, great sound, $10.
 
Thanks. The ATC is too pricey IMO, some brands only produce very expensive drivers, yet when you look around you can find great drivers from 10$ upwards if you are lucky & know where to look. The Peerless 850443 would be the perfect example : flat, very low distorsion, great sound, $10.

Jesus, the Volt VM752 is even more expensive. Holy smokes. Bloody Brits.
There has got to be some equivalent quality mids out there for about 8-10 times less.
 
The IB2S uses PMCs own mid, they are made in house by PMC in Luton.

The closest thing available is the Volt VM752 which costs a bit more than the ATC mid.

The IB1S uses the Scanspeak D7608/920010 as far as I can tell which is substantially cheaper.
But then IB1S cost half as much as IB2S.

The Scanspeak D7608 is at an ok price, i suppose (75€). Heck, that's a lot less than the ATC or the Volt.

Ok, so i'm going for my first 3 way with these then :
-Vifa D27TG-35-06 ($28)
Vifa D27TG-35-06 1" Silk Dome Tweeter 264-1022
- Scanspeak D7608/9200.00 (76€)
http://www.speakerworld.nl/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=513&category_id=33&option=com_virtuemart&Itemid=109
-
Tang Band WT-1427G ($124)
Tang Band WT-1427G 10" Neo Subwoofer 264-862
 
BB5 - Audax TW34XP
BB5SE - Seas 27TFFC

Both might well be some kind of oem versions.

Hi there Burnett

Thanks for that input!

Are you sure that is correct?

I was in a mastering studio last week, it had a nice BB5XB system. The tweeters looked like the ones used in the PMC AML1, with that perforated grille on top of their dome (the "Acoustic Radiator" as they call it.) Or is that the oem part of what you said? ==> see photo attached here

Cheers
 

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Hi there Burnett

Thanks for that input!

Are you sure that is correct?

I was in a mastering studio last week, it had a nice BB5XB system. The tweeters looked like the ones used in the PMC AML1, with that perforated grille on top of their dome (the "Acoustic Radiator" as they call it.) Or is that the oem part of what you said? ==> see photo attached here

Cheers

AML1 uses the same Audax tweeter.
Yes, the waveguide and the diffusor are imho oem parts.