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Old 19th September 2012, 09:03 PM   #1
ORNJ is offline ORNJ  United States
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Default How good are fullrange for movies?

Been really looking hard at full range drivers for a build since they are so much cheaper of an option than going the route of multiple drivers PLUS crossover/miniDSP and so many more amplifiers....

However, I was originally looking at them for music...now, however, I am starting to wonder how they would be for movies....I am still stuck on the conventional thought that it just wont be enough for those loud hard hitting scenes in movies like Jurasic Park, The Dark Knight, Super 8....

Am I 100% wrong?
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Old 19th September 2012, 09:09 PM   #2
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I enjoy my FRs for movies and i am not the only one buy a long ways.

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Old 19th September 2012, 09:11 PM   #3
Zen Mod is offline Zen Mod  Serbia
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it depends of room , power and your habits (regarding SPL)

I like FRs , but I'm spoiled - bass helper is a must

see example , these are of friend of mine : Hifish's Sonido speakers - diyaudio.rs
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Old 19th September 2012, 09:13 PM   #4
Bigun is offline Bigun  Canada
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I built a set of FRs for my home theatre. In the end I stripped them out and replaced them with 2-way and 3-way commercial floorstanders. The reason was that I find my choice in movies is not the same as my choice in music. Movies aren't necessarily hi-fi and I look to get some real ooomph from movie sound tracks. I believe FRs can achieve ooomph, but not the smallish simple one's I built. I'm very satisfied with the floorstanders; there are a number of relatively inexpensive commercial offerings that I think would be a better option than DIY FRs - and I know some people will say otherwise. As usual, you'll have to find what suits you. My home theatre is in my basement where I have room to play. A set of floorstanders is not an easy proposition for the average living room.
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Old 19th September 2012, 09:29 PM   #5
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Bigun really hit the mark.

It depends on the music, the movie, and volume levels you need for enjoyment.

I love the superior intelligibility of a full range driver and the "little" details provided.

On one hand, I like bass impact (that doesn't happen from a single 6" with subwoofer). To me I need more cone area for 80-200hz.

But on the other hand, I like rumble (a 6" with subwoofer works here).

So I rearrange often. For action movies, I prefer dual 15's crossed at 750 to a compression driver. But I'm a bass head.

Or run a full range driver wide open with a sub (6db crossed or it may have inductance to roll off above 200hz naturally).

It's up to you. But if you want higher volumes, I'd try an Audio Nirvana an12 or an15 (with sub) and equalize it to how you want it to sound.

Norman

Last edited by norman bates; 19th September 2012 at 09:58 PM.
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Old 19th September 2012, 09:56 PM   #6
chrisb is offline chrisb  Canada
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Add another vote to the "hell ya, but...." column

As always, the room will have a lot to say about what minimum requirements will be for "realistic" bass and visceral impact across the full bandwidth, particularly for those wanting to emulate the full THX immersion effect - which is something that not all folks necessarily want.

Personally, the last theatrical release that I attended (Prometheus 3D - living proof of relativity of time - it felt like 6 hours) gave me a pounding headache by the end of the trailer for the new Dark Knight film - and I soon remembered why it'd been at least 5 years since my last cinematic "treat". Does it sound like I enjoy being pummeled by over 2 1/2 hours averaging 90dB+ SPL and peaking at over 110? I can easily achieve that by walking onto the production shop floor - or maybe it was the complete lack of captivation by the story? but I digress.

In moderate sized rooms, and with the bass management of current surround receivers, and presumably HTPCs, the bandwidth content to the main front row and surrounds can easily be tailored to within the limits of smaller single driver FR speakers. The number and location of "subs" which can be XO's well above 100Hz in many cases, is up to you (and the room) - but multiples of any size work best.


I happen to be using Mark Audio Alpair7 and 6Ms, along with a pair of corner located woofers each using dual 7" drivers - the room is approx 320ft^2, and I generally listen well below 80dB average at distance of 11ft from the front row. It works for me.
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Old 19th September 2012, 09:56 PM   #7
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For bass impact, the ones that hit you hard and fast in the chest, we are actually talking about lower midrange. We want a straight frequency response down to 80Hz. A slight bump between 80-100Hz would hit even harder.

To do these things, we want a cone that is stiff and weighs more than the 10g that most 8" fullrange cones are. These cones are not going to have treble extension. So forget a 4" fullrange unit. It may be OK, but compare it to a Scanspeak Illuminator 7" with 9mm xmax and the experience will be completely different.

I would also go with a sealed enclosure, and the fullrange units don't like that.

Bottom line, it can be done, but the demands of high efficiency fullrange and visceral movie experience are at odds when it comes to speaker unit design.

Last edited by cotdt; 19th September 2012 at 09:59 PM.
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Old 19th September 2012, 10:03 PM   #8
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Quote:
Originally Posted by cotdt View Post
... lower midrange...
= 160-320 Hz.

Is that what you mean?

dave
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Old 19th September 2012, 10:04 PM   #9
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Quote:
Originally Posted by cotdt View Post
Bottom line, it can be done, but the demands of high efficiency fullrange and visceral movie experience are at odds when it comes to speaker unit design.
There are lots of low efficiency FRs too.

dave
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Old 19th September 2012, 10:05 PM   #10
cotdt is offline cotdt  United States
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In a smaller room, the Alpair 10.2's would work. In a 9.5L sealed enclosure the -3dB point is 70Hz and it does seem to have the claimed 8.5mm of xmax! Add in a subwoofer and it is quite nice. Not as heavy hitting as RS225 or Illuminator, but the best I've seen in a fullrange unit.
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