Heresy

[heresy&jolida]

Has anyone stacked Heresys? This is to say demented enough to take four Heresy and form a two channel system with two left speakers and two right speakers by setting one on top of the other?

[colterphoto1]

If you do so, consider inverting the top pair so the tweeters are next to each other. I know of guys who have that setup with Heresies and Cornwalls, if you can imagine that. It works better with the horns tight together.

Michael

[DrWho]

Another option is to disconnect the tweeter and squaker in one pair of

the speakers which will increase the bass response without introducing

comb-filtering. (in other words, multiple tweeters and squakers will

actually work against each other because you can't get the drivers

close enough to each other for the sound to fully sum. The woofers are

playing lower frequencies (longer wavelengths) so a stacked

configuration will sum completely).

Btw, the woofers in the heresy are already 3dB too quiet (for various

reasons), so the addition of another woofer will actually result in a

flatter response too.

It's relatively easy to turn the squakers and tweeters on and off so I

would encourage you to try both methods and share with us which way

ends up sounding better.

[djk]

For best results and best tonal balance with stacked type E network Heresy:

Disconnect the mid and HF on the bottom one.

Re-tap the top network to a B type network and add 2µF to the existing 2µF mid cap.

[mark1101]

Yeah, I am using a stacked pair as a center channel in a 2 channel setup. They are both fed the same signal (composite center) and sound great as a center stack.

[hwatkins]

For best results and best tonal balance with stacked type E network Heresy:

Disconnect the mid and HF on the bottom one.

Re-tap the top network to a B type network and add 2µF to the existing 2µF mid cap.

Now that is interesting and the more I noodle on it it makes sense - worth a try....

[JulieHeartKlipsch]

What would this sound like compared to a Cornwall?

Julie

[JulieHeartKlipsch]

I mean 4 Heresies compared to 2 Cornwalls[]

J.

[DrWho]

Doubling up on the woofers will only increase the SPL of the system, so

the frequency response slope will remain the same. The cornwall will

therefore have much deeper bass, but the sensitivity of the dbl heresy

system will be about the same (you get a gain of 6dB by doubling up on

drivers and wiring them in parallel).

You could however build larger cabinets for the heresy drivers (or put

them both in a single large cabinet) and then port the enclosure to

achieve an F3 equal to that of the cornwall. You still get the same

sensitivity increase so both systems would have very similiar

sensitivities.

However, there are two tradeoffs. First, it's simply more expensive to

have two woofers instead of one. Secondly, having two drivers playing

the same source material will introduce comb-filtering effects at

frequencies smaller than a quarter-wavelength between drivers. This

comb-filtering will limit the upper range of the dual woofers, thus

preventing any possible improvement over a single 15" driver at those

frequencies (typically 12" drivers are better above 500Hz than 15"

woofers are, but that won't be the case here).

Like my sig, it's all about compromise...a dual ported heresy system

would indeed sound good, but I don't feel it would be worth the extra

time and money compared to simply upgrading to cornwalls.

[sunburnwilly]

DrWho , What are your thoughts on using 2 Heresys side by side as a center channel . My Sony processor has 2 center outs ; if that matters . Would you get decent results by switching the phase of one ?

[DrWho]

DrWho , What are your thoughts on using 2

Heresys side by side as a center channel . My Sony processor has 2

center outs ; if that matters . Would you get decent results by

switching the phase of one ?

Well what are you trying to achieve by doing so? The only advantage of

having multiple speakers playing the same source material is an

increase in volume. Is your single center heresy not loud enough? The

only other time that it would be feasible to run two speakers off the

center channel would be if you are unable to achieve a central location

for the speaker (ie, you have a huge TV in the middle that you can't go

below or on top of). Putting one speaker on each side will center the

sound on the TV instead of having it off to one side. But in both

situations you start running into issues of comb-filtering. It's up to

you to determine which compromise is better.

Btw, if you disconnect the squaker and tweeter from the second heresy

and modify the crossover like djk mentioned then the comb-filtering

thing isn't going to be as big of an issue. What are you running for

mains? Perhaps you should look into selling the heresies and get

yourself a timbre matched center...a pair of heresies next to each other isn't that much smaller than another belle.

[sunburnwilly]

2 Heresys , side by side with a glass top , is the stand for my 50" DLP . For the next 7 days . []

[JulieHeartKlipsch]

Thanks Dr. Who. I thought it seemed a little nutty. All you have to do is turn up the volume control a tiny bit on one pair!!!!!!!!

J.

[Duke Spinner]

+6 dB ...is not a Little bit ...J.....[]

[colterphoto1]

Try Dr. WHo's mod. I think he's got it absolutely right on this one. For side by side centers you sure don't want both sets of horns firing. Get into all kinds of timing and phasing trouble. If it's just a temp setup, just unhook the mid/tweet from one cabinet and run them together, you should like the result.

Michael

[sunburnwilly]

Sunday I was on the short wall . Today I'm on the longwall . The 2 Heresys in the center are temporary , and only 1 is hooked up . " This pic is Sunday "

[sunburnwilly]

This pic is today . " Next Monday the TV will be sitting on something else "

[sunburnwilly]

And a shot of the other side .

[sunburnwilly]

And finaly a shot related to the thread . " If nothing else , Heresys make great stands for ... Heresys . " ( you should see my new coffee table )

[heresy&jolida]

Thanks for the info. Pardon my ignorance, but how do I connect the stacked Heresy, just run wires from one speaker terminal to the other or run a seperate wire from my amp? I have 4 & 8 Ohm speaker outputs do I stay with 8 Ohm outputs? Why do you suggest an additional cap for the top squawker? Do I just add another 2mfd cap and run jumper wires to the existing cap to sum 4mfd? Thanks for the help.