Take a look at the (EQ) curves on this one!

[ben.in.salzburg]

As you chaps across the pond say - posting this for sh*ts n' giggles.

See page 8 for revealing curves...

http://www.crownaudio.com/pdf/legacy/k80780.pdf

It was interesting to see that they boost the highs and lows by up to 15dB to make the speakers provide a flatish response...

To compare, my OmniTop 15 needs maybe 3 dB of EQing to flatten out nicely

Ben

[LelandCrooks]

Looks like the dreaded face eq.

But it's for bose.

[Bill Fitzmaurice]

Got no highs, got no lows...must be Bose!

[BrentEvans]

Got no highs, got no lows...must be Bose!

Since we're Bose Bashing...

Bose: Buy Other Sound Equipment
Bose: Based On Stupid Engineering
Bose: Better Own Something Else

That will be all, for now.

[ben.in.salzburg]

Yeah. I always thought people were exaggerating re the lack of highs and lows. But Crown is hardly going to make this stuff up.

What I don't get - aren't they fatally overpowering the speakers to get bass out of them?

[jeffsco]

I don't think Bose is the only one. The Soundcontractor who did the installation at our church set up my Drive rack 260 with the EQ curves that EV recommends for our EV 15's / 2" horns combined with the EV DSP (which we couldn't afford) . We SMAART'd the room and it sounded good / O.K. Then we applied the curves...basically some boosts at 2.2k and 7.36 k along with a rising Shelf boost from 8k and upwards. Made all the difference in the world.

I'm eager to get my DR 250's built and to compare them with the "top of the Line" EV front end that's installed there.

[Bill Fitzmaurice]

What I don't get - aren't they fatally overpowering the speakers to get bass out of them?

That's why the 801 has eight drivers, the 901 nine, and they still need a sub. The original 801/901 used a passive EQ network, not active. The speakers were thus rated for 'unlimited power', and Bose even came out with a 1200w 80 pound amp to drive them with. This was in the '70s when 200 watts was a very large amp. The bad news was that the passive network ate up about 10dB, so the Bose driven with 1200w was no louder than any other direct radiator driven with 120w.

[Ron K]

I don't think Bose is the only one. The Soundcontractor who did the installation at our church set up my Drive rack 260 with the EQ curves that EV recommends for our EV 15's / 2" horns combined with the EV DSP (which we couldn't afford) . We SMAART'd the room and it sounded good / O.K. Then we applied the curves...basically some boosts at 2.2k and 7.36 k along with a rising Shelf boost from 8k and upwards. Made all the difference in the world.

I'm eager to get my DR 250's built and to compare them with the "top of the Line" EV front end that's installed there.

Those 2" horns were most likely CD horns and the boost 27.36 and rising EQ above 8K was most likely part of the CD Horn EQ that would have been necessary.Constant directivity horns dont sound very good when the CD Horn EQ isn't applied.System processing is pretty much the norm today.