AudioCircle
Industry Circles => GR Research => Topic started by: emailtim on 22 Feb 2018, 07:14 pm
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I have a couple of questions about H-Frames.
1) If one was to physically align woofers facing front and back, what would be the ideal vertical alignment plane on the woofers (e.g. bottom of cone, half the depth of the cone, half the volume of the cone, outer edge of the cone, or something else) ?
2) Instead of stacking multiple drivers immediately on top of each other, would it be acoustically beneficial to vertically space them out into more of a taller line array of a triple or a quad to match the height of your main line arrays (or would this be more dependent) ?
3) Where are the prices listed on the HX800 amps ?
TIA
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A set of quads ends up being pretty tall with our modular subs , .... 59.5" , a 6 stack would be 88" (those measurements are withthe 1.25" base and top plates).
IIRC, the HX800's are $570 from Danny...
(http://www.audiocircle.com/image.php?id=167726)
(http://www.audiocircle.com/image.php?id=163152)
Don't think you'd get any benifit by spacing them vertically
jay
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I have a couple of questions about H-Frames.
1) If one was to physically align woofers facing front and back, what would be the ideal vertical alignment plane on the woofers (e.g. bottom of cone, half the depth of the cone, half the volume of the cone, outer edge of the cone, or something else) ?
Ideally the voice coil is what is used. But it really doesn't matter too much at those wavelengths. A 20Hz note is 56 feet long. So how many degrees of phase rotation is a few inches? The same can be said for a 40Hz note that is 28 feet long etc.
2) Instead of stacking multiple drivers immediately on top of each other, would it be acoustically beneficial to vertically space them out into more of a taller line array of a triple or a quad to match the height of your main line arrays (or would this be more dependent) ?
Won't make any difference. The wavelengths are too long.
3) Where are the prices listed on the HX800 amps ?
$579 each.
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Thanks much CaptainHemo and Danny for the quick responses.
FWIW, my mains are 79" tall.
P.S. I see I dropped a word in my line array question. I thought separating them might be [more "room" dependent] or excite more of the room.
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Thanks much CaptainHemo and Danny for the quick responses.
FWIW, my mains are 79" tall.
P.S. I see I dropped a word in my line array question. I thought separating them might be [more "room" dependent] or excite more of the room.
Spreading the subs out tends to even out the room loading.
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Another question about the HX800XLR3 amp. If it contains 2 Hypex Amps and can drive 6 x 12" speakers (3 drivers/amp), can this amp run in stereo mode or is it still just mono (that combines both channels) ?
Can the HX800 support dual 3 x 12's in stereo mode and single 6 x 12's in mono mode ?
Looking to work my way up the food chain in an incremental way. I already have a 370 and before getting another one, I would like to know what incremental configuration options there are for adding more 12" drivers.
TIA
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The HX800 only has a mono input, either XLR or RCA. The Hypex module inputs are tied together.
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You can disconnect the slave module /amp internally to only pwer 2 or 3 drivers until you add more. If you don't use the 2nd set of driver/servo leads without disconnecting the slave module, the amp will detect a connection error and won't power on youi'll et an error code.
So for example, you could buy 2 HX800's and run a set of triples off each until you converted the stacks to quads or 6's. If you are considering tho 6's at some point , be sure to buy the SW12 16FR's
jay
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You can disconnect the slave module /amp internally to only pwer 2 or 3 drivers until you add more. If you don't use the 2nd set of driver/servo leads without disconnecting the slave module, the amp will detect a connection error and won't power on youi'll et an error code.
So for example, you could buy 2 HX800's and run a set of triples off each until you converted the stacks to quads or 6's. If you are considering tho 6's at some point , be sure to buy the SW12 16FR's
jay
Hi Jay,
Thanks for the response, but I wanted to know if 1 HX800 could run dual [1-2-3]x12's in stereo mode until one determined the need to go to dual [4-5-6]x12's in stereo (e.g. buy 1 amp for up to the first 6 drivers and later add the second amp for up to the next 6 drivers) for scalability reasons.
The 370 only does mono [1-2-3]x12's, no stereo options.
The HX800 only has a mono input, either XLR or RCA. The Hypex module inputs are tied together.
HAL, thanks for the answer. Not the one I was hoping for, but what I figured would be the case.
Maybe this would be a new product idea for Brian and Danny to help people work their way into the higher driver numbers over time ???
TIA
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No, the HX800 is still a mono amp.
The problem with a stereo amp is that the customer would want to put one on each side of the room. For the servo control system to work properly each amp needs to be located with each set of drivers. Long speaker leads cause a delay in control and performance starts falling off.
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Hi Jay,
Thanks for the response, but I wanted to know if 1 HX800 could run dual [1-2-3]x12's in stereo mode until one determined the need to go to dual [4-5-6]x12's in stereo (e.g. buy 1 amp for up to the first 6 drivers and later add the second amp for up to the next 6 drivers) for scalability reasons.
The 370 only does mono [1-2-3]x12's, no stereo options.
HAL, thanks for the answer. Not the one I was hoping for, but what I figured would be the case.
Maybe this would be a new product idea for Brian and Danny to help people work their way into the higher driver numbers over time ???
TIA
HAL had already answered it above my post which was why I didn't address it and istead offered another posible option although it does include buying a pair of HX800's.
Don has done exactly what I mentioned, he is using a pair of HX800's, each controlled a triple stack right now that will soon become quads or 6's.. Once you've the 800's, you can pretty much do any config you want
It only hurts once :thumb:
jay
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HAL had already answered it above my post which was why I didn't address it and istead offered another posible option although it does include buying a pair of HX800's.
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I didn't see Hal's response until later. I appreciate the information.
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It only hurts once :thumb:
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Not true, it hurts every time something new comes along =). The pile gets deeper and deeper over time.
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Not true, it hurts every time something new comes along =). The pile gets deeper and deeper over time.
Ain't that the truth. :lol:
Mike
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I didn't see Hal's response until later. I appreciate the information.
Not true, it hurts every time something new comes along =). The pile gets deeper and deeper over time.
ahhh, but here'the kicker.... nothing new/better is coming along . I;'ve ad the OB servo bass for a few years now, not feeling any need to make changes, it's amazing.
Go with these , you're done .... PERIOD :beer:
jay
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ahhh, but here'the kicker.... nothing new/better is coming along . I;'ve ad the OB servo bass for a few years now, not feeling any need to make changes, it's amazing.
Go with these , you're done .... PERIOD :beer:
jay
I completely agree, the best bass I have ever heard and I only have 4 subs.
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I completely agree, the best bass I have ever heard and I only have 4 subs.
Yep, I agree. Look, 3 audiophiles agree, so you KNOW it's true :P
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ahhh, but here'the kicker.... nothing new/better is coming along . I;'ve ad the OB servo bass for a few years now, not feeling any need to make changes, it's amazing.
Go with these , you're done .... PERIOD :beer:
jay
Never say never...
I am pretty sure Mr.Rythmik has 15" & 18" paper cone OB prototype samples,
but no avsforum comments from him on the performance or any availability yet.
Poke. poke : )
Shawn
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Never say never...
I am pretty sure Mr.Rythmik has 15" & 18" paper cone OB prototype samples,
but no avsforum comments from him on the performance or any availability yet.
Poke. poke : )
Shawn
I had some 15" paper cone based drivers made for OB use. But they didn't play any lower, or perform any better. They just had more moving mass so they were not as fast.
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Never say never...
I am pretty sure Mr.Rythmik has 15" & 18" paper cone OB prototype samples,
but no avsforum comments from him on the performance or any availability yet.
Poke. poke : )
Shawn
I can't see the larger woofers interesting me... the 12's are incredibly fast and already play flat to 20hz and even down into the teens. to me, going larger may actually degrade the quality, with more moving mass and larger cabinets prone to more resonence.
jay
see Danny's post above LOL
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Never say never...
I am pretty sure Mr.Rythmik has 15" & 18" paper cone OB prototype samples,
but no avsforum comments from him on the performance or any availability yet.
Poke. poke : )
Shawn
Why would you even care about 15 inch woofers? The 12s already go down to 20hz, with power. And quality? No box sub I've heard can touch them. And I've owned/built/heard some insanely good box subs, up to and including several Infinite Baffle ones.
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Sd effective cone diameter pi * radius squared
I noticed both of the previous posters have four * OB 12's
You could use 2 * OB 18's and gain ~10% output.
But as Danny pointed out moving mass is against the larger cones, voice coils and suspensions.
Shawn
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Output is not an issue... at all. Lots of headroom.
In a larger room ( I'm only in 18' x 12') you need more air movement, add an additonal driver(s), don't add more mass and cabinet size.... bigger is not necessaryily better :o
jay
jay