Clearly it is a very general statement, room gain has to be measured same with room modes etc. Can be somewhat estimated by dimensions and materials but still. And to say it is clearly not suited is a little strong maybe, there is many ways to skin a cat.
The OPs question was searching for a enclosure, for a TD18H+ Apollo. 30-600HZ preferrably without EQ.
The TD18 is clearly from specs a large/high spl midbass and will have a fairly high F3/6 etc.
Can make it passively reach low in a large enclosure "EBS" if one don't value group delay too highly, and willing to live with the challenge it gives on low end sensitivity after rolloff, everything is a tradeoff so. It also looks well suited as a horn driver in some ways.
To increase extension passively you can ofc add series R , a huge high pass cap etc, and the listed specs on the AE website is, i assume for the normal version as they can't be exactly the same with the Apollo mods. There is quite a difference from the only available third part measurements ive found @ data-Bass.com also.
It's got a very generous xmax and a high output capability down low so it is clearly,well suited for active EQ on the low end.
And is one of the few 18's that looks like it will behave well at the OPs desired top end. If only needing 4-500 HZ his 18N862s would likely do that range (30-450 fx) more easily with less needed enclosure vol, group delay, a more rigid cone etc so it is a very viable candidate too, that also got a well behaved FR,inductance,distortion behaviour etc, But ofc less efficient so needs more power and have a lower xmax.
I hope System215 finds a solution hes happy with.
Hey there - hoping you can help. I ordered the exact drivers online from AE a couple weeks ago and I can’t reach anyone.
A) Was this your experience?
B) How long did it take from your order to delivery … and
3) - We are trying to get the enclosure baffle machined - could you tell me the diameter of the outer frame of the driver?
Much thanks!!!
Posted a pic in your other thread.
Just wanted to say, it looks like the TD18 and my dipole 18 are built on the same frame.
The diameter in the tech drawing states 18.6”.
I measured 18 3/8” (18.375) with the rubber frame seal in place.
Not sure if its a different frame or gasket or what.
The one thing I would say is that it would make me pause and reconsider machining a baffle before you actually have the drivers in your hands.
Why risk double the materials and labor costs?
Just wanted to say, it looks like the TD18 and my dipole 18 are built on the same frame.
The diameter in the tech drawing states 18.6”.
I measured 18 3/8” (18.375) with the rubber frame seal in place.
Not sure if its a different frame or gasket or what.
The one thing I would say is that it would make me pause and reconsider machining a baffle before you actually have the drivers in your hands.
Why risk double the materials and labor costs?
I purchased my AE TD18+ Apollo during the height of the pandemic. Took almost six months between payment and delivery. But supply chains have improved since then, so my experience may no longer be a reliable or useful guide. Prior to the pandemic, for example, I waited about six weeks for a pair of TD15H (non-Apollo).
They are quoted with the same dimensions, and look identical so likely so.
There is also difference between the 2009, and 2021 drawings.
https://aespeakers.com/pdfs/
The outer diameter of the aluminium basket on AE's PB 18 is 462 mm (= the same basket as for TD18 H+). I took off the original plastic / rubber gasket and counter sunk the driver into the baffle with a more suitable soft and thin gasket. Suitable routed depth is 9,5 mm if one wants the front of the aluminium basket flush with the baffle surface and if your choice of new gasket has residual thickness of about 0,5 mm.