DAYTON 12" HO SUB-Deal of the Weekend @ Parts Express

[DeanP]

Dayton's 12" HO for $100!
Here

[KeithM]

The HF driver looks better spec-wise, but this is still a deal. Something I just realized weird about the High-fidelity driver is that it has a higher output than the high output driver.

[cjd]

What size box Keith?

The HO is designed to be cranked in a small(er) box with boost, whereas the HF requires more box but also less power... one's for the boom boom crowd, one is for the audiophile.

Or, that's the theory.

C

[KeithM]

I'm just referring to the free-air test that dayton provides.

[capslock]

Well, does anybody have full TS parameters?

The HO has half the Vas at about the same fs, so it is bound to have a higher moving mass. Where did they add the weight? Different (heavier?) cone or just some dead mass added near the VC?


The HO has a four layer VC vs. a two layer VC in the HO. This is what brings it up to almost the same sensitivity again.

[Scott Simonian]

The HO has half the Vas at about the same fs, so it is bound to have a higher moving mass. Where did they add the weight?

It's in the cone. On the parts express page it should say the difference between the two series. At least it does in the mailed home mag from PE. The cone is heavier to withstand the higher internal pressures.

[capslock]

Actually, my calculations tell me that in a 30 l sealed box (Q=0.7 for the HO) as well as in a 55 l box (0.7 for HF) the HO is about 25% more efficient, even if it offers about 15 Hz higher f3 in the big box case. This is true all the way down to 20 Hz, so one may use LT without remorse

[capslock]

Must have been a typo in of of the parameters. The HF is more efficient, but not by much:
0.1771% for the HO, 0.192% for the HF.

The XXLS308 is more like 0.35%, the SLS12 0.72%, but they both need bigger boxes (unless one is going dipole).