horn loading changing impedance

[valhallax]

i do have a set of 515g's here..i dont i love the guy that much,they say gpa all over them. besides, im saving those for this lil tuba horn project. dont know if i made it clear. the drivers in those cabs are 8 ohm as well. the only caps i would have to change would be the lf. and some detail destructions..lol

[bfish]

Good thing your old man ain't readin' this, shame on you.

Make him happy. Sell the 418s ($100-125ea) and take a little hit to get him some 416s. I promise* you won't regret it!

*(assuming you don't get f-d on eBay)

[bfish]

On second thought, I won't promise no regret, I remembered fathers-in-law aren't necessarily permanent...

[Old Guy]

Originally posted by bfish:
You lost me there. To make the 16 ohm driver appear like an 8 to the XO, you'd need to parallel a 16 ohm resistor with the driver. Then half the HF XO output would be burnt up in the resistor, would it not?

<font size="2" face="Verdana, Helvetica, sans-serif">Right- a 3 db loss. Since the HF is 6-8 db more efficient, it's not an issue. Yer gonna turn it down anyway.

[Old Guy]

Originally posted by CONVERGENCE:
[QB]You must change the capacitor value and inductor value .

There is no other way.

QB]

<font size="2" face="Verdana, Helvetica, sans-serif">Other way to do what?

What I posted will work fine.
The 3 db los from resistive matching would be preferable to the HF loss induced by transformer matching.

Transformer matching on the LF side isn't such an issue.

Neither is the BEST way. But they certainly work, and not badly.

[bfish]

Touche! Just checking your med levels OG...yer not slurring yet, so a dosage increase is warranted...

[valhallax]

turn my high freq attenuator down..its on 2 now.

[Old Guy]

0 is full on, 2 is a cut position. That's higher than many run, possibly because of the upward mismatch you have.

The higher number is less output from the HF.