All Heritage HT: Dilemma on Surrounds

[DrWho]

And then here is how things model up:

Blue = Cornwall

Green = Stock Heresy II

Purple = Flushmounted Heresy II

[DrWho]

The previous plot was with 1W of input. Here is a better depection of the relative outputs:

[oldbuckster]

Nice graphs but there is no way a flushmounted Heresy will rival the Bass output of a Cornwall with out a Sub.......................maybe, maybe close with a Sub, and flushmounted, but both speakers standing on their own, unassisted by Sub, not even close.........or are you assuming a Sub is used on the Heresy's?

[formica]

.... or are you assuming a Sub is used on the Heresy's?

Mike is talking about purely flushmounting...

In simple terms, the bass response will increase due to focusing (using

the ceiling in this case) those frequencies on axis. In other

words... you are recuperating the bass which would normally wrap

backwards around the Heresy by modifying it's polar response.

The horn mids and highs already are more focused so they are less affected than the bass.

ROb

[oldbuckster]

Formica, how can it rival a Cornwall when it still won't reach down as low on the lower end response, that won't change, or will it? I have stated before, I'm not a very technical type guy, and the only way I learn is by asking questions, so you guys have to bear with me......................

[DrWho]

Check out the second response chart and note how the flushmounted

heresy is doing way better than the cornwall...6dB more output at 30Hz.

Granted the heresy won't be as efficient (about 2dB quieter), but that

can be compensated for in the crossover. At moderate volumes it will

sound very much like the cornwall. It's not perfectly apples to apples

because the second you throw the cornwall into the room it is going to

benefit from some room gains as well. In the end they come out very

close.

If you want to experiment for yourself go find a sliding door. Wrap the

speaker in blankets and close the door on it. Then install a board

above to fill in the rest of the gap (using blankets as a gasket). You

should notice a radical increase in the bass response. If not, you

probably didn't set it up well enough []

The effects of baffle gain are very similar to those of corner gain

(due to the size of the wavelengths in question). The crossover on the

original Heresy I was built to take this into account which is why many

would consider the top end to be a little too forward - especially when

the speaker is pulled away from the corner. The later Heresy II not

only used a better driver, but the crossover was tweaked in such way to

be a little more effective out from the corner. The even later Heresy

III is using an even better bass driver and an entirely new approach

with the crossover to maximize its use as a main speaker.

[eq_shadimar]

Many good ideas here. I would suggest trying a tatic that has been used by some people and that is pointing your Hersey's into the corner or at the back wall. This way you will see the backs of the speakers but it does produce a less direct sound and you will not have the horns pointing right at you. As long as you balance the system correctly using a dB meter the loudness of this setup should match the rest of your system.

Also I would not worry about hanging a Heresy on the wall. There are many ways to do that safely. Heck I have a Cornwall hanging above my TV with no issues.

Laters,
Jeff