Can we re-create the sound signature of a specific IEM?

Lately I've heard the Final Audio Design Piano Forte VIII IEM.

Almost everyone I knew who've heard it agrees that it gave a feeling of vintage sound. The bass isn't powerful, so as the veiled treble.

But it's just unique that I don't know what's happening.

I can't seem to find a FR graph for the IEM as well.

Reading somewhere, someone mentioned that DSP and EQ-ing could change the signature of an IEM.

So, is it possible to re-create the feeling of Piano Forte VIII IEM? That old-school, vintage feeling?

Edit: The Piano Forte series are uber expensive IEM where their main difference between each other is the housing material. So, can EQ rectify the material difference (reverb, etc) that other IEM can also have this kind of feeling?

I've listened to the Piano Forte II before. If price is an indication (I mean, IF), then Piano Forte II would be day and night compared to the Piano Forte VIII, IX, and X. Since the price would differ as much as 10 to 20 times. Piano Forte II is made of plastic, where VIII is brass. But from the picture in the website, the driver used is the same for all models.

It was said that materials affect the sound greatly. I guess that accounts for the distortion and reverb.

But thanks xnor. From that graph and from my listening session on Piano Forte II, I agree that it's highly mid centric and it has near to zero bass impact, several treble spike which I find rather painful for some tracks. The plastic housing didn't help either.

So which means this graph could be the basis of the entire product line...