Originally Posted by Buddylee123
What’s the danger zone on the UM18?
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Ricci didn't find the danger zone, but noted it was beyond 35mm in his testing.
Needing an 8 cubic foot box for the same QTC as the UM18 hits in a 4 though tells us it has a substantially weaker motor.
Originally Posted by Soldy
Is a price known yet? In most cases 35 mm Xmax (p-p) is more than enough. In my case, the 18" driver never will reach its Xmax because the electronic limit is reached first. To make full use of the Xmax (@25 Hz) of the UM and get a Qtc of 0,7 the enclosure has to be 10 cubic feet
35mm isn't the xmax, that's the point where the coil slams the backplate, that's the kill range. Like I said, that part isn't a negative (8mm from xmax to xmech is fine.), I was just sharing what info was given in comments by fi on the post. Also, the UM18 gets a QTC of .72 in a 4 cubic foot box. This driver needs 8 cubes to hit .71. To put that in perspective, the UM18 gets a QTC of .62 in a 7 cubic foot. Quite a difference.
Waiting to hear back from Fi on what they used to rate the xmax.
Originally Posted by notfastenough
Although a close rival to the UM would be awesome, I'm pretty sure the target with the HT1 sub was to jump in place of the SI 18. If that value can be matched or beaten in terms of output per $, then I'd say mission accomplished.
If Fi can match or beat the UM with a HT2 at a close price point, then I'd say they would be batting 2 for 2. I'd guess the HT3 would be targeting the HST-like market if we see that as well. Options are a great thing, especially when you can have an option to buy American.
Best of luck to Fi on this product venture!!
It's can't match in output per dollar with the HT18 v2, but then again at that price point it'd pretty much be impossible to do so.
I'll be curious to see the HT2, but I'm not sure how they'd be able to come in at a similar price to the UM18. The HT1 is already pretty close to that price. I'm thinking the HT2 will be closer to what the OP here was given, as we now know that driver is clearly not the HT1. The HT1 may still be a solid value if you don't mind a huge box though.
I inquired with Fi on if they're going to be using anything to combat inductance in these drivers now as well. I'm legitimately curious and hoping we nice a strong showing from Fi here on the new HT series. It's been boring telling everyone who asks about an 18 for the under $500 budget to buy a UM18.