metal FR drivers that don't need a tweeter/correction circuit..

[Bill poster]

..etc looked at FR88/89, Daytons, TBs etc and some opinions are that most seem to need some kind of help, either breakup or other issues

Just thought to compile a proper list would be beneficial to those looking to choose because to me a big point of the 'full range' driver is simplicity and/or lack of components in the signal path etc.

Seems like the Alpair 6 is smooth

so I will put forward these two

Alpair 6
Jordan JXR6

[MisterTwister]

you can use acoustic filter.
just attach piece of dense foam in front of the driver.
adjust thickness of the foam untill you like the sound.

[planet10]

Alpair6 can be used sans woofer help, JX6 needs helper woofer for sure.

dave

[Bill poster]

planet 10 I'm sorry, should have made the thread starter clearer- ie its purely about top end issues, whether they need bass support etc was not my criteria.

Its just odd that so many small metal wide bandwidth drivers are being released but virtually all have issues at the top end in some way and benefit from a circuit or a tweeter.

[BudP]

Alpair 7eN, mounted in a correctly sized resistance loaded box, does not "need" a sub woofer. However, correctly mated to something as fast and with as much textural ability as the 7eN has, provides a startlingly good system. The only portion missing is the "weight" of upper bass, from 100Hz to 400 Hz. This points to having a larger diameter Mark Audio driver if that FR is important to you.

The Alapair 7eN has no issues anywhere and flat to 30K does indicate it's ability to resolve inner information within tones and transients.

Bud

[rjbond3rd]

Whether a circuit is required is not really a function of the driver, but of the whole driver / cab geometry / boundaries / room / listening position.

If you want to avoid a circuit, just use two drivers Or do a cab that provides enough gain to offset the step loss, and then measure how many degrees off axis yields a flat-ish response.

[Bill poster]

Its purely about how a driver measures.. sans room effect, little piece of foam or jar of water in front of cone etc.

[MisterTwister]

here is an example how foam affects FR.
block of foam placed in front of a Neo-8 driver.
neo8-waveguide.gif

[Dave Jones]

Originally Posted by MisterTwister

here is an example how foam affects FR.
block of foam placed in front of a Neo-8 driver.
Attachment 202491

What kind of foam, and how thick? Do you have pictures?

[MisterTwister]

I don't know what kind of foam it is. It is pretty dense and soft.
It's from discount hardware store.
Here are some more pictures
Twisterspeakers DIY loudspeaker projects: Neo8 planar transducer in a waveguide