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Author Topic: RCF L18P300 on EV ELX118p  (Read 1600 times)

Pedro Marques

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RCF L18P300 on EV ELX118p
« on: April 05, 2017, 05:51:50 am »

Hello every one,

I am new at this forum and I'm here to ask you guys if you think that if I put this speaker "RCF L18P300" on this subs "EV ELX118p" will work fine?

Have any one tried something like this?

Tank you guys

PM
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Mac Kerr

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« Reply #1 on: April 05, 2017, 08:37:19 am »

Hello every one,

I am new at this forum

Please go to your profile and change the "Name" field to your real first and last name as required by the posting rules displayed in the header at the top of the section, and in the Site Rules and Suggestions in the Forum Announcements section, and on the registration page when you registered.

Mac
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Pedro Marques

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Re: RCF L18P300 on EV ELX118p
« Reply #2 on: April 05, 2017, 06:20:32 pm »

Hello every one,

I am new at this forum and I'm here to ask you guys if you think that if I put this speaker "RCF L18P300" on this subs "EV ELX118p" will work fine?

Have any one tried something like this?

Tank you guys

PM

Please any one?
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Scott Holtzman

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Re: RCF L18P300 on EV ELX118p
« Reply #3 on: April 06, 2017, 03:11:31 am »

Please any one?


Clearly English is not your first language so humor won't help.


"Work fine" is not meaningful.  Work fine for what?  What do you want them to do?  Hard data, area you want to cover, sound level goals, material type, amount of low end extension expected.



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Scott AKA "Skyking" Holtzman
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William Schnake

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Re: RCF L18P300 on EV ELX118p
« Reply #4 on: April 06, 2017, 07:48:49 am »

Hello every one,

I am new at this forum and I'm here to ask you guys if you think that if I put this speaker "RCF L18P300" on this subs "EV ELX118p" will work fine?

Have any one tried something like this?

Tank you guys

PM
Pedro, I am contracting EV to see which 18" speaker they put into the EXL18p cabinet.  After I find out the answer to that, hopefully today, I will be able to compare the specifications on that 18" vs the RCF L18P300.  The L18P300 will work and create sound.  The real question is how well will it work.  I will post as soon as I get a response from EV and can compare the two speakers.

Bill
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Bill Schnake - Owner Schnake Sound, Inc

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Mark Wilkinson

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Re: RCF L18P300 on EV ELX118p
« Reply #5 on: April 06, 2017, 10:52:47 am »

Bill, thank you for your effort to help Pedro.
It reflects well on us as forum members, when such kind professional courtesy is offered to newcomers.
mark
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Paul G. OBrien

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Re: RCF L18P300 on EV ELX118p
« Reply #6 on: April 06, 2017, 12:12:04 pm »

Quote from: William Schnake link=topic=163092.msg1500803#msg1500803
I am contracting EV to see which 18" speaker they put into the EXL18p cabinet. 

According to the spec sheet it's the same 8 ohm EVS-18k driver that is found in the passive version of the cab.
Not that this matters, since this is a self powered cab you would still only have the same 700w powering the "upgraded" RCF driver so you can't take advantage of it's increased output potential.. making the whole exercise a waste of time and energy... IMO.
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Scott Holtzman

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Re: RCF L18P300 on EV ELX118p
« Reply #7 on: April 06, 2017, 12:18:23 pm »

Bill, thank you for your effort to help Pedro.
It reflects well on us as forum members, when such kind professional courtesy is offered to newcomers.
mark


Mark - I respectfully disagree with you.  Mollycoddling and doing someone else's work for them does not help increase knowledge or develop useful professional skills.


Leading someone down the path to learning how you select a driver for a cabinet, along with the correct application assists in professional development.


I did however note that this may be an ESOL issue and simply an inability on behalf of the OP to communicate the request.



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Scott AKA "Skyking" Holtzman
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Pedro Marques

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Re: RCF L18P300 on EV ELX118p
« Reply #8 on: April 06, 2017, 12:48:40 pm »

According to the spec sheet it's the same 8 ohm EVS-18k driver that is found in the passive version of the cab.
Not that this matters, since this is a self powered cab you would still only have the same 700w powering the "upgraded" RCF driver so you can't take advantage of it's increased output potential.. making the whole exercise a waste of time and energy... IMO.

When using the powered version of the subwoofer that I own, I can only use the volume in the middle, more than this and it starts to turn on the limiter light.
So I thought I'd get a speaker with more capacity to take full advantage of the amplifier.

The loudspeaker of the amplified and passive version are the same.

Thank you for all your help.

PM
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Steve Litscher

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Re: RCF L18P300 on EV ELX118p
« Reply #9 on: April 06, 2017, 02:28:59 pm »

Hi Pedro,

If your powered sub's limiter light is blinking at 1/2 volume, a more powerful speaker will not help. The limiter indicates the amplifier is clipping and limiting its output.

I suspect you are playing the speaker louder than it is able to go, or your incoming signal gain structure is incorrect.

Regardless, the original EV driver is an EV F 01U 174 472. I was unable to find much technical data for the speaker (hole spacing, basket diameter/depth, etc). Full Compass does sell a replacement driver: http://www.fullcompass.com/prod/192701-Electro-Voice-F01U174472

But, as I mentioned here, I don't believe the driver is the problem. You likely need a more powerful subwoofer, more subwoofers, or you need to fix the structure of your signal to help eliminate the limiting and clipping.

Pedro Marques

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Re: RCF L18P300 on EV ELX118p
« Reply #10 on: April 06, 2017, 02:44:09 pm »

Hi Pedro,

If your powered sub's limiter light is blinking at 1/2 volume, a more powerful speaker will not help. The limiter indicates the amplifier is clipping and limiting its output.

I suspect you are playing the speaker louder than it is able to go, or your incoming signal gain structure is incorrect.

Regardless, the original EV driver is an EV F 01U 174 472. I was unable to find much technical data for the speaker (hole spacing, basket diameter/depth, etc). Full Compass does sell a replacement driver: http://www.fullcompass.com/prod/192701-Electro-Voice-F01U174472

But, as I mentioned here, I don't believe the driver is the problem. You likely need a more powerful subwoofer, more subwoofers, or you need to fix the structure of your signal to help eliminate the limiting and clipping.

What I want to ask is if a more powerful speaker will give more headroom to the amplifier!?
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Pedro Marques

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Re: RCF L18P300 on EV ELX118p
« Reply #11 on: April 06, 2017, 02:55:02 pm »

Hi Pedro,

If your powered sub's limiter light is blinking at 1/2 volume, a more powerful speaker will not help. The limiter indicates the amplifier is clipping and limiting its output.

I suspect you are playing the speaker louder than it is able to go, or your incoming signal gain structure is incorrect.

Regardless, the original EV driver is an EV F 01U 174 472. I was unable to find much technical data for the speaker (hole spacing, basket diameter/depth, etc). Full Compass does sell a replacement driver: http://www.fullcompass.com/prod/192701-Electro-Voice-F01U174472

But, as I mentioned here, I don't believe the driver is the problem. You likely need a more powerful subwoofer, more subwoofers, or you need to fix the structure of your signal to help eliminate the limiting and clipping.

What I want to ask is if a more powerful speaker will give more headroom for the amp.

And yes I need a more powerfuld subwoofer.
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Steve Litscher

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Re: RCF L18P300 on EV ELX118p
« Reply #12 on: April 06, 2017, 03:40:55 pm »

What I want to ask is if a more powerful speaker will give more headroom for the amp.

And yes I need a more powerfuld subwoofer.

No. It will not.


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Mark Wilkinson

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Re: RCF L18P300 on EV ELX118p
« Reply #13 on: April 06, 2017, 04:41:09 pm »


Mark - I respectfully disagree with you.  Mollycoddling and doing someone else's work for them does not help increase knowledge or develop useful professional skills.


Leading someone down the path to learning how you select a driver for a cabinet, along with the correct application assists in professional development.


I did however note that this may be an ESOL issue and simply an inability on behalf of the OP to communicate the request.

Hi Scott, thanks for the stand-up comments.  I agree with your points about what ultimately helps us develop.
My years have simply led me to believe that putting the human connect side, ahead of the developing knowledge and professional skills side, most often proves to work best for achieving all goals. 
So I guess that's what i was really thanking Bill for...more so than for the research he is doing ...
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William Schnake

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Re: RCF L18P300 on EV ELX118p
« Reply #14 on: April 06, 2017, 05:00:04 pm »

What I want to ask is if a more powerful speaker will give more headroom for the amp.

And yes I need a more powerfuld subwoofer.
Pedro, I am sorry to say that EV was not able to send me a spec sheet on this speaker.  I am sure you can put the RCF in the cabinet, but it's not going to get you any additional power.  It would seem to me that you might want to review your gain structure to insure that you aren't clipping the power amp to early.

Sorry.

Bill
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Pedro Marques

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Re: RCF L18P300 on EV ELX118p
« Reply #15 on: April 06, 2017, 06:01:52 pm »

Pedro, I am sorry to say that EV was not able to send me a spec sheet on this speaker.  I am sure you can put the RCF in the cabinet, but it's not going to get you any additional power.  It would seem to me that you might want to review your gain structure to insure that you aren't clipping the power amp to early.

Sorry.

Bill

Tank you Bill, tanks for your time and efford.
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Dustin Walker

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Re: RCF L18P300 on EV ELX118p
« Reply #16 on: June 24, 2017, 08:29:15 am »

Hi Pedro,

Others are correct about the fact that by changing your driver you won't keep the limit light from coming on. The only gain that could be made would be if the "RCF" woofer would have a higher sensitivity rating than the original. This would possibly give you more output, which I assume your trying to achieve being these are not very powerful subs.

There are many more factors than "sensitivity" to keep in mind though. The EV cabinet could possibly allow the "RCF" to overextend it's xmax and eventually destroy itself. If the RCF driver is rated to handle way more power that what the amp can put out, it (RCF) may be just fine due to that fact that your only giving it 700w RMS / 1400w MAX. So your going to have to do your homework to see if it would give the increase your looking for.

You need to find a "cabinet calculator" (which can be found online) and fill in the cabinet specs as well as the RCF's specs to see what the outcome would be. I would assume you might be able to contact EV to see if they could give you a spec sheet on the factory woofer and cab. I wouldn't expect much from them, but it's worth a try.

This is a lot of info to take in, but maybe others could explain it better than I. I hope this helps you find some resolve to your problem.
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Ivan Beaver

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Re: RCF L18P300 on EV ELX118p
« Reply #17 on: June 24, 2017, 10:09:58 am »

Hi Pedro,

Others are correct about the fact that by changing your driver you won't keep the limit light from coming on. The only gain that could be made would be if the "RCF" woofer would have a higher sensitivity rating than the original. This would possibly give you more output, which I assume your trying to achieve being these are not very powerful subs.


There is a lot more than a "simple sensitivity rating" that tells how loud a particular loudspeaker driver is.

Unless the ratings were done the same way (this can easily vary by several dB or more) you cannot compare the "simple numbers".

You MUST look at the measured response-and assume it was measured the same way.  This-again-is not always the case-ESPECIALLY in HF devices.

So lets "assume the numbers are correct and measured the same way", will the driver with the higher sensitivity get louder?

Maybe-but at what freq?  Some freq may be louder-and others may be quieter.

Are the "quieter freq" more important to the user?  Hard to say.

This is yet another example of how "simple numbers/specs" can get you into a lot of trouble by making assumptions.

You need real data to make useful comparisons.
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