Rs180P/RS28F vs. small DC160 3 way

[filmslayer]

i case some of you thought i'm being a wimp about the heat , thermostat in my shop a couple hours ago , it now reading 101 !

[filmslayer]

here's a look using factory curves and the BC25 measured on a different baffle . the 2 way is from measured response using the floor boundary . i'm thinking of adding an external port and taking some measurements out in the middle of the room today , when i do it looks like the BC25 is physically a drop in and i'll be able to get on baffle measurements of that ... getting closer .

[filmslayer]

a lil better look at the 2 way ...

[filmslayer]

had a really good back and fourth with Josh today and went with some of his advice ! the prototype will have 17 components ...

[jhollander]

The x-o is almost as much $ as the drivers...

[filmslayer]

The x-o is almost as much $ as the drivers...

more !!! $90 in drivers and $130 in XO parts ... lol
i was warned about this , but outta pocket it wont be to bad . i have the BC25's not doing anything , i also have half the inductors already and all the caps but the 20 and 70 uF . and that had me switch a couple of values here is what i got now ...

[jhollander]

Check watts dissipated graph, in XSim, those resistors before the x-o are going to consume some power

[filmslayer]

Check watts dissipated graph, in XSim, those resistors before the x-o are going to consume some power

where do i find said graph ? i looked , couldn't see it ...

[filmslayer]

never mind John i found it ... its not to bad , 1 watt max in the tweet circuit and about a 1/2 watt in the mid ...

[Wolf]

John- I don't agree with the wattage sentiment, as proven by the result fs saw. You still have an AC signal, no matter what side the series resistor is on. This means the signal is still being highpassed in both mid and tweeter circuits. In the event the series and shunt resistors are both in front (rarely, and is a no-no) then they see the full bandwidth. In the event the shunt resistor is of small value, solo, and it's across the load and shunting a lot of power, then that could also be of concern.

Later,
Wolf

[jhollander]

Ben, Not sure I understand '...as proven by the result fs saw" Watts dissipated is a function of frequency, so while I can't say it's "more" I can say the resistor watts dissipated would be different before and after the cap in the tweeter circuit. Is that the crux of the disagreement?

[Wolf]

I was referring to what 'filmslayer' (I shortened it to fs) found. In this case, the watts dissipated will not change if it's in series with a capacitor whether before or after it. It won't change as this is an AC circuit.

Later,
Wolf

[filmslayer]

'filmslayer' (I shortened it to fs)

my friends just call me Slayer ;-)

and what i saw John was only 1.5 watt dissipation both circuits combined .

Edit *** just changed them around , and with the resistor after it was just slightly higher than 1 watt in the tweeter circuit ...

[filmslayer]

y'all got me thinking about this now so lets take a look . this is from after i made the change but the curves are very similar . the biggest peak is around 175hz , i'm crossing the tweet around 3850 ???

anyone got an explanation for this ?

[jhollander]

Mr Slayer there's not enough information to figure out the change, without seeing which resistor and the circuit change. BTW right click on the amp in XSim, tune, and adjust the wattage to something like 30 watts, then look at you components.

Ben I'll post a comparison later.