Center-fill speakers we use for large events (RCF HDL-10A)
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- čas přidán 11. 11. 2020
- A look at the center-fill speakers we use for larger events (RCF HDL-10A). Center-fill speakers are great for covering the area in front of a stage. However, not all events need a center-fill speaker. This video covers when to use a center-fill speaker (there is a little math involved).
Center-fill speakers are to cover only the area that the main FOH speakers are unable to; they are to supplement the main speaker system. Center-fill speakers should not be louder than the FOH speakers. Using too many center-fill speakers can cause phasing issues that will result in lower sound quality and potentially lower volume levels.
Center-fill speakers in this video: RCF HDL-10A.
Here's the basic math: (using a 20ft. distance with a 90deg. horizontal coverage horn)
2 * 20ft * tan(90/2)
40ft * tan( 45 )
40ft * 1 = 40ft (answer)
This channel is like a stepping stone between small events and large events with thousands of people. This is a unique look at this perspective. Usualy all I’ve seen is small dj vlogs with a few hundred in attendance and then large format with over 10,000 Neither of those types of vlogs cover the information I’ve seen in this channel! I really appreciate the information on this channel. Thank you for sharing this
Thank you for your comment!
Thanks for sharing, very interesting and helpful as always
Thank you for your comment.
very informative, sir, as always. thank you
Thank you sir!
Around 2:56, if you look by your hand, it looks like there is a centipede behind the grill! Crazy! Awesome video I use these methods also, just nice to hear it explained!
Interesting. I did not notice that! Looks like it could be some small strands of white fibre glass insulation blowing around. I had some insulation out to repack a speaker cabinet while making this video.
@@stageleftaudio Good Morning! Question: So when you say, in your example, "30 feet for each side..." does that mean 15 feet to the left of the [left side speaker] and 15 feet to the right of the speaker?? Meaning, in your example the left and right FOH speakers would combine to provide 30 feet of coverage in between the two speakers?? So, if you had them 40 feet apart, with the 90 degree horn, you would be missing 10 feet of coverage in the center of stage, and possibly need a fill speaker?? Thanks, as always. Carl
Thanks for sharing. Your channel is going to help alot. New subscriber.. 👍
Awesome, thank you!
Minimum investment maximum output that's RCF👍❤
At about 8:56 what towers or rig are you using to fly the pa on them ground stack things.. thats cool and i may need a pair of them.
Those are speaker lifts; they were designed and manufactured by Penn-Elcom. However, to my understanding, they are no longer manufactured.
We have flying hdl20 & total Distance between L & R PA is 45 fit ... so that how much delays needed in Center fill ?
Crowd is 10 fit from PA & 15 fit from Center fill
If the center fill is in line with FOH, no delay is needed. If the center fill is sitting forward of the FOH line, then delay may be needed for the center fill. If the center fill is sitting behind the FOH line, then a delay on FOH may be needed. Delay is set at 1ms per 1 foot. (.3048m). to make it easy, make sure the center fill in in line with FOH.
Will there be a loss in spl If you’re power amplifier puts out less rms power than what you’re pa speakers are rated to handle
The SPL rating of a speaker is directly connected with how much power the speaker is provided. Less power equates to less SPL.
Do you phase aline these center fills with foh or just leave it as it is?
They are closely phased, but depends on the stage layout and FOH speaker location. Though, center-fills are used to cover the area the FOH speakers are unable to cover, which usually does not cause much phasing issues as long as the volume level of the center-fill is loud enough to cover just the center area. It usually doesn't end up well when the center speaker is louder than the FOH speakers. Controlling the volume level of the center-fill keeps phasing issues under control for the over-all FOH quality. Though, as mentioned in the video, it's best not too add more center-fills than what is needed... this can cause sound quality issues with the center area.
@@stageleftaudio thank you for acknowledging me:-).
Are pa speakers with 2 15 inch woofers in them rated at 4 ohms instead of 8 ohms
Not necessarily. It depends on how the woofers are wired (parallel or serial). Check the manufacture's specs. They will show what the ohms are for the speakers.
I recommend the RCF subs. I have a set of RCF 8006AS and they are no joke
Those are great subs.
@@stageleftaudio I will be adding some HDL's to my small setup this year God willing
Can I know Where do you do FLight Case For your gadgets
We use various cases, some are custom made. All our cases are made of wood with metal supports/corners (used and new). Any of the local music stores in your area should carry comparable cases.
How good are this RCF HDL10a? can I do a Festival or big concert with 8 of this boxes like 4 on each side?
We enjoy those speakers. They can be used for festivals and smaller concerts, as long as the speakers are only being used for mid/high frequencies. You will need subs with these cabinets.
@@stageleftaudio yes I have:
4 JBL SRX828sp Subwoofers
8 RCF HDL10a
that should be enough for a festival don't you think?
Looks like a good combination. That should be enough for a festival. There's a lot of variables involved with determining the coverage of a system, but from what you have, looks like it could cover a few hundred people.
@@stageleftaudio thanks for the reply! I have learn a lot from your videos keep it up!
What kind of speaker line array stand is that you are using at 4:46min of video
Those are: RCF NXL-23A
@@stageleftaudio I was speaking regarding what lift not the speaker
My apologies!! The lifts were manufactured by the Penn-Elcom company. It's designed to hold about 600 lbs and can be taken apart of easy transportation. However, Penn-Elcom no longer manufactures those lifts. I'm not sure if another company is continuing with the manufacturing. Hope this helps.
RCFL HDL10a or DAS 208A help
Have you heard how good sound town 210 line array sound or how good the are for Festivals
Have not heard anything about them. Looking at their website and the model number you reference, the cabinets are passive. A little work with amplifier limiting and power may be needed to ensure those speakers are used safely to their best.
@@stageleftaudio thanks for your Opinion
The rcf 23 are very hard to find used
Yes they are!
Do 10 inch pa speakers in sealed enclosures make the windows rattle when you crank up the volume on the mixing console
Most any speaker can make a window rattle. It depends more on the size of the room and the quality of the window, than on the size of the speaker.
If you were to play rock music or heavy metal music through pa speakers and crank up the volume on the mixing console will the spl level be higher compared to other genres of music being played through pa speakers
SPL is a measure of sound. Any genre of music can exceed the SPL of another genre if enough volume is applied.
Why would you not send the bass guitar to the center-fill cabinet? Bass guitar ranges from 40hz to 400hz and harmonics can be 4000hz. Set a low cut for 80hz or 100hz. The lower register on keyboards/synth can go lower than a bass guitar.
Good question. We high-pass the center-fills around 60-80hz. What we add to the center-fills is dependent on what instruments are used for the band(s). We don't add bass to the center-fills... There's usually a lot of bass coming from the subs, which would result in the center-fills needing to be "extra loud" to bring out the lower-db level harmonics of a bass. There's usually plenty of bass on stage from the bass guitar cabinet, which does contain harmonics from the "bass wash" off the stage. The center-fills are used to supplement what is not normally heard at the front of a stage. If there any guitar amplifiers pointing forward (toward a center-fill speaker), those guitars are not included in the center-fills.
Can metal window screen mesh from the Home Depot be used to make replacement grills for pa speakers
No. It is not strong enough to take a hit. Most grills on speakers are around 16ga to 18ga. steel.
Can you take the woofers out of a pair of 15 inch full range pa speakers and use them as subwoofers with a low pass filter if the woofers have a really low frequency response below 60 hertz
Yes. Though, the quality of the bass depends on the speaker (and cabinet). As well, bass response can be relative to the listener. One woofer may sound different/better than another.
Can you replace a woofer in a full range pa speaker with a subwoofer driver
Yes.
Why are you flying your “pa” off your crank stands, instead of using the stageline pa points?... also you should high-pass your front fill so they don’t get unwanted low end in them. Also at 6:16, were you trying to do cardioid subs with that single 18” cabinet... you know it doesn’t work like that right...
We use the stands because it allows us control over when, how, and where the speakers are flown. By using our flying equipment, we are not dependent on when the Stageline engineers would be available to raise/lower the canopy. The center fill cabinets only receive what is being fed into the main FOH (assuming FOH is running mid/high only), or from a matrix... both of which are already high-passed. The center fill deployment is based on a few factors (as was referenced in the video). The cardioid setup in the video was not setup to completely reduce the bass on stage; it was used to keep the levels lower (which it did; as was reported from the bands). Many bands want some bass on stage, just not a lot.
@@stageleftaudio chain hoist are pretty easy to request of the stageline people...maybe its different where I live. Center fill would have to be high passed externally especially if you are using that analog desk. I would hope that you don’t high-pass your L/R unless you were running aux subs, and even then... might be easier to send your subs L/R to reduce stage sub (yes it increases “power alley” in the audience, but people seem to find where they want to sit..