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Scoop Issue (Plays deep but doesn't hit hard)

Printed From: Speakerplans.com
Category: Plans
Forum Name: Scoops
Forum Description: One scoop or two ;-)
URL: https://forum.speakerplans.com/forum_posts.asp?TID=98272
Printed Date: 29 March 2024 at 1:05am
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com


Topic: Scoop Issue (Plays deep but doesn't hit hard)
Posted By: MINTEVENTRESOURCES
Subject: Scoop Issue (Plays deep but doesn't hit hard)
Date Posted: 12 April 2017 at 1:57am
Hello All, 

I have a medium chamber scoop loaded with Eighteen Sound LW1400s. The issue is boxes play deep and full although, they do not have a lot of pressure or hit you in the chest hard. Would anyone be able to lend some knowledge as to what is being done wrong whether design or speaker? 





Replies:
Posted By: mini-mad
Date Posted: 12 April 2017 at 4:42am
Yes.... its a sub cab not a bass cab.

Your scoop plays 80hz and dowm. Kick is about 70-200hz.

You want it to THUMP, then build a short horn that plays 70-200hz.

Job done!!



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If it sounds like a gorilla is trying to escape, turn it down.


Posted By: JR.junior
Date Posted: 12 April 2017 at 7:12am
Try to reduce throat/chamber size, could be too big for T/S of the driver.

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Support the scoop technology, larger mouth plays louder!


Posted By: MINTEVENTRESOURCES
Date Posted: 12 April 2017 at 1:48pm
Reducing the chamber size would be the reducing the airspace between the front baffle and the baffle behind the speaker? Would you suggest adding another baffle behind the front? It would not be possible for me to add to the rear baffle as the speaker needs the depth to fit. I could also add wadding?


Posted By: Dub Specialist Sound
Date Posted: 12 April 2017 at 3:12pm
100% chamber size and throat size

there the problem, lack of spl and pressure


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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...


Posted By: Dub Specialist Sound
Date Posted: 12 April 2017 at 3:14pm
Yes you can add a 2nd baffle if that all you got to play with ie without heavy modding and wrekking the box ect

ive dun it plenty times,

you can put on in in 2 pieces fit super flush get the cuts spot on

, glued and screwwed no problem, 


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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...


Posted By: Dub Specialist Sound
Date Posted: 12 April 2017 at 3:17pm
So whats the size is the magnet of yu driver from the rear baffle

as i said yu can add it on the rear baffle, thats if you have room of course


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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...


Posted By: MINTEVENTRESOURCES
Date Posted: 12 April 2017 at 3:57pm
Unfortunately, I do not have the exact dimension of how much space is between the magnet and the second baffle. I do not think there is enough space to add to the baffle on the back side. I would have to add it on the inner side of the front baffle. The inner dimensions of the chamber is roughly 24" by 24" by 8.9" if that helps. Now when you say throat issue can that be fixed?




Posted By: bee
Date Posted: 12 April 2017 at 6:19pm
the lw1400 is a nice driver but not my first choice even for a cheaper end of the range driver.

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https://www.elements-audio.com


Posted By: MINTEVENTRESOURCES
Date Posted: 12 April 2017 at 6:36pm
We all know that the PD, Void, and Turbomax are the most respected and best. With that said those are diffidukt to obtain here in America. What would be you choice for a speaker in this class?


Posted By: BASSHORSE
Date Posted: 12 April 2017 at 7:18pm
what design scoop is it? sound like my super scoops build with a pertrackter,.nuff low end but the other notes wasnt so loud,.i know the ass s118 as got nuff punch too um so you can get anice bass & throw from certain scoops,,but dubs knows is scoops so i would defo say the chamber too big henace the deep bass & no control & punch..


Posted By: MINTEVENTRESOURCES
Date Posted: 12 April 2017 at 8:05pm
I do not have the full design either. The cabinet designer / building wasn't a nice guy hence my issue. You are correct. This design is similar to a super scoop without the dogleg, and braces behind the second and third baffle, as well as no brace in the mouth. I do have the 45 degree braces on the rear panel and behind the second baffle. Dub would you happen to have any pictures of the modifications you have done to the first baffle?



Posted By: MINTEVENTRESOURCES
Date Posted: 13 April 2017 at 7:05pm
Hello all to confirm. By adding another baffle I will increase the cone control, Spl, and pressure from the box? I want to be sure I understand this correctly before I make any modifications. Would a picture of the box help you guys?


Posted By: bee
Date Posted: 13 April 2017 at 9:18pm
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:

We all know that the PD, Void, and Turbomax are the most respected and best. With that said those are diffidukt to obtain here in America. What would be you choice for a speaker in this class?
 
18 sound 9601 all day long, easy to source in the us too.


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https://www.elements-audio.com


Posted By: MINTEVENTRESOURCES
Date Posted: 13 April 2017 at 9:48pm
Originally posted by bee bee wrote:

Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:

We all know that the PD, Void, and Turbomax are the most respected and best. With that said those are diffidukt to obtain here in America. What would be you choice for a speaker in this class?
 
18 sound 9601 all day long, easy to source in the us too.

This unit wants a ton of power. Not sure if this will cure my SPL and pressure issue? Would you say yes? Would you say this driver stands up the the PD, Void, Turbo kings?



Posted By: djkeet
Date Posted: 14 April 2017 at 10:37pm
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:


This unit wants a ton of power. Not sure if this will cure my SPL and pressure issue? Would you say yes? Would you say this driver stands up the the PD, Void, Turbo kings?


This speaker (18Sound) will more than stand up remember the Void and Turbomax require a lot of juice as well and as one forum member reminded me there is a trade off with higher power usually you get lower sensitivity PD obviously higher Sensi out of the bunch. Could also look at B&C,but the 18Sound will deffo do the job as the rest

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Soundbite


Posted By: levyte357-
Date Posted: 15 April 2017 at 12:07pm
Originally posted by djkeet djkeet wrote:


This speaker (18Sound) will more than stand up remember the Void and Turbomax require a lot of juice as well and as one forum member reminded me there is a trade off with higher power usually you get lower sensitivity PD obviously higher Sensi out of the bunch. Could also look at B&C,but the 18Sound will deffo do the job as the rest


No.

Void V18-1000 is the most sensitive out of "The Bunch".

Still seems, people buy "big man drivers", and then try to power them with "little boy" amps.

You shouldn't buy Void, PD 185x, Turbomax, 18sound 18NLW9601, unless you have an amp, that can "really" deliver 1000w, 40-100hz, per 8 ohm driver.

Most sub amps advertise huge output figures, and simply can't do the above, @ 4 ohm stereo.

I've used Void Inf8Mk2, to power 2x 8 ohm 18sound 18NLW9601 per channel, in my Lev .44 Scoops, and the sub and throw was immense.

Match right driver, with right cab, right amp AND "Speaker Cable", and it all becomes quite easy.

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Global Depopulation - Alive and Killing.


Posted By: MINTEVENTRESOURCES
Date Posted: 15 April 2017 at 12:13pm
Originally posted by levyte357- levyte357- wrote:

Originally posted by djkeet djkeet wrote:


This speaker (18Sound) will more than stand up remember the Void and Turbomax require a lot of juice as well and as one forum member reminded me there is a trade off with higher power usually you get lower sensitivity PD obviously higher Sensi out of the bunch. Could also look at B&C,but the 18Sound will deffo do the job as the rest


No.

Void V18-1000 is the most sensitive out of "The Bunch".

Still seems, people buy "big man drivers", and then try to power them with "little boy" amps.

You shouldn't buy Void, PD 185x, Turbomax, 18sound 18NLW9601, unless you have an amp, that can "really" deliver 1000w, 40-100hz, per 8 ohm driver.

Most sub amps advertise huge output figures, and simply can't do the above, @ 4 ohm stereo.

I've used Void Inf8Mk2, to power 2x 8 ohm 18sound 18NLW9601 per channel, in my Lev .44 Scoops, and the sub and throw was immense.

Match right driver, with right cab, right amp AND "Speaker Cable", and it all becomes quite easy.


Lev

I couldn't agree more with the matching that is definitely the key. Are you familiar with the issue I am facing with my box itself? Could you lend a helping hand?


Posted By: levyte357-
Date Posted: 15 April 2017 at 12:59pm
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:



Lev

I couldn't agree more with the matching that is definitely the key. Are you familiar with the issue I am facing with my box itself? Could you lend a helping hand?


First thing, don't listen to people on here, who don't like Scoops, or Reggae Soundsystems/Reggae.

Next, like Bee said, 18LW1400 is pretty average in Scoops compared to other, superior drivers.

Before you go modifying Scoop, accept possibility your Scoop design might just be average, and maybe better you sell all of them, and just get better Scoops built.

Right,

What is depth from Rear baffle to inside of front baffle, in mm?
What is the width from left to right, inside of chamber, in mm?
What is the length from top to bottom of rear baffle, in mm?

Is there just gap at bottom of rear baffle? if so what is height, in mm?

Before people start talking about reducing anything, and mods, is intelligent to know approximate volume of chamber first.

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Global Depopulation - Alive and Killing.


Posted By: MarjanM
Date Posted: 15 April 2017 at 1:46pm
First of all, put some picture here so people can see what is going on.
Second, 18LW1400 is not a bad driver, it is pretty much same thing with the RCF 18P300 that is one of the recommended drivers for the Rog's scoop.
Now it is outdated for sure, but for a moderate spl job it should do just fine.


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Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713


Posted By: JR.junior
Date Posted: 15 April 2017 at 5:24pm
I  sugest that you alter the throat size step by step, till you find the right opening size and than fix the plate with overhang on the throat opening at the rear baffle. Any pictures yet to come?

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Support the scoop technology, larger mouth plays louder!


Posted By: djkeet
Date Posted: 15 April 2017 at 9:47pm
[QUOTE=levyte357-]

No.

Void V18-1000 is the most sensitive out of "The Bunch".

Rather than take the discussion away from the matter at hand Lev or anyone else can you explain to me why you feel that Void is the most sensitive as its common knowledge that its a greedy driver @ 97.7 PD 98 am I missing something or is there other data out there?

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Soundbite


Posted By: odc04r
Date Posted: 15 April 2017 at 10:45pm
Why do you think a driver's free air sensitivity matters once it is mated to a horn? It isn't working into free air anymore.


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 2:02am
Hello all , pictures and measurements coming shortly.


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 3:00am
[QUOTE=levyte357-] [QUOTE=MINTEVENTRESOURCES]

Hello All / Lev 

Below are the requested measurements. 

What is depth from Rear baffle to inside of front baffle, in mm? = 231.775mm
                  
What is the width from left to right, inside of chamber, in mm? = 571.5mm

What is the length from top to bottom of rear baffle, in mm? = 406.4mm

Is there just gap at bottom of rear baffle? if so what is height, in mm? = 174.625mm



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Mint Event Resources


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 3:11am
Originally posted by MarjanM MarjanM wrote:

First of all, put some picture here so people can see what is going on.
Second, 18LW1400 is not a bad driver, it is pretty much same thing with the RCF 18P300 that is one of the recommended drivers for the Rog's scoop.
Now it is outdated for sure, but for a moderate spl job it should do just fine.

Pictures




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Mint Event Resources


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 3:14am


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Mint Event Resources


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 3:15am


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Mint Event Resources


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 3:16am


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Mint Event Resources


Posted By: MarjanM
Date Posted: 16 April 2017 at 11:18am
Hmmm, i dont see anything wrong with the box.
Maybe its the scoop sound that you are not use to.
As you can see almost everyone are using them with a kick box above.


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Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 1:20pm
I know and love the scoop sound. I am missing the pressure the kind that makes you want to run from the speaker.

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Mint Event Resources


Posted By: djkeet
Date Posted: 16 April 2017 at 3:30pm
Originally posted by odc04r odc04r wrote:

Why do you think a driver's free air sensitivity matters once it is mated to a horn? It isn't working into free air anymore.

Well I would have thought this would be a good indicator (Considered along with TS params)of power efficiency but it appears your saying its irrelevant, so it doesn't really matter that I thought that the PD was more sensitive but also its Irrelevant that the Void is, as it has to sit in its own specific design like all subs. As far as I know there's not many people that use Void in scoops.Cheers

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Soundbite


Posted By: MarjanM
Date Posted: 16 April 2017 at 3:48pm
Sensitivity is always averaged from the pass band way out of operational range. In most of the cases 100-500hz.
For subwoofers you need to look at other things.
QTS, VAS, BL X-max.
Heavier cone drivers will have more x-max and thus shift more air.
Will need more power, but that is not relevant because we are after the max spl, not the 1w spl.


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Marjan Milosevic
MM-Acoustics
www.mm-acoustics.com
https://www.facebook.com/pages/MM-Acoustics/608901282527713


Posted By: Dub Specialist Sound
Date Posted: 16 April 2017 at 3:49pm
The size of that throat is enormous man, and a strange up angle panel, imho

so its probably down to the design

i aware of the top heavyweight scoops buildwith large-ish throats 


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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 4:14pm
No solution Dub? Or suggestion of such? Patiently awaiting Lev's response.

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Mint Event Resources


Posted By: djkeet
Date Posted: 16 April 2017 at 4:46pm
Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

The size of that throat is enormous man, and a strange up angle panel, imho

so its probably down to the design

i aware of the top heavyweight scoops buildwith large-ish throats 

I've got a few scoops/and I'm comparing and thinking the same as you Dub SP the up angle panel sits low it should be more acute this design will play low freq I cannot see how your going to have your cake and eat it. Will there be any consideration to bracing in the horn mouth, is their any reason why horn plans on here or others (established) minis weren't considered first

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Soundbite


Posted By: bee
Date Posted: 16 April 2017 at 5:03pm
looking at pic, ill second the throat section being way to big. can you fit a panal in there, re put a dog leg back in...

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https://www.elements-audio.com


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 6:26pm
A panel might fit depending on the driver. Which I may change if the Eighteen Sound 9601 is the best solution. I can make a dog leg that extends the baffle but may have to wrap around the rear baffle a bit. Or make a traditional dog leg and call it a day. What do you suggest the baffle be in order to appropriately lessen the size of the throat?

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Mint Event Resources


Posted By: Sypa
Date Posted: 16 April 2017 at 10:05pm
First thing that comes to my mind thats just not a place for handles in a scoop. Some loss of spl there for sure.


Posted By: MINTEVENTRESOURCES
Date Posted: 16 April 2017 at 10:10pm
Originally posted by Sypa Sypa wrote:

First thing that comes to my mind thats just not a place for handles in a scoop. Some loss of spl there for sure.


Before and after test conducted no loss of SPL.

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Mint Event Resources


Posted By: bob4
Date Posted: 17 April 2017 at 8:23am
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:

. This design is similar to a super scoop without the dogleg, and braces behind the second and third baffle, as well as no brace in the mouth.


Maybe missing braces are a part of the problem?


Posted By: cookie-dj
Date Posted: 17 April 2017 at 10:13am
If a scoop isn't braced properly, some of the energy is lost

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You can't polish a turd!


Posted By: Sypa
Date Posted: 17 April 2017 at 11:05am

Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:


Before and after test conducted no loss of SPL.

Fair enoughSmile

Also i think in general a lot of the dirty sound of scoops comes from them not being properly braced.


Posted By: levyte357-
Date Posted: 17 April 2017 at 12:35pm
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:

Pictures


You've asked for my opinion, so I'll give it.

Firstly, anyone who has done personal testing with different Scoops and drivers, as opposed to just sat at PC summing all day can tell you, Void V18-1000 sounds loudest in most Scoops, due to sensitivity.

Doesn't mean is best sounding,just means is loudest.

Been saying this for over 10 years, not gonna argue with people, whose opinion is not based on practical testing, who have never compared diff drivers in different Scoops.

Next, as I alluded to in my first post, that short Scoop, with minute horn mouth, & huge throat, is nothing like Superscoop, & I wouldn't waste my time with them.

Plenty free designs around, that fire with many different drivers.

Better to buy used 18" Eminence/Fane/real Superscoopers, & use recommended, known drivers to work in them.

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Global Depopulation - Alive and Killing.


Posted By: MINTEVENTRESOURCES
Date Posted: 17 April 2017 at 1:17pm
Lev,

Thanks for your feedback. I will consider give the Eighteen Sound 9601 a shot as a last effort to achieve more pressure. Overall, the box is far from horrible I merely wanted to find a way to increase the pressure. I shall update you with any findings.

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Mint Event Resources


Posted By: Sypa
Date Posted: 17 April 2017 at 1:37pm
I see no one asked you what amp you using to power it?


Posted By: MINTEVENTRESOURCES
Date Posted: 17 April 2017 at 2:12pm
Qsc Powerlight 6.0

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Mint Event Resources


Posted By: levyte357-
Date Posted: 17 April 2017 at 3:33pm
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:

Qsc Powerlight 6.0


I Don't see 18NLW9601 excelling in that Scoop.

That would be waste of very expensive driver.

Sell the Scoops, buy decent used, & have choice of many driver's.

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Global Depopulation - Alive and Killing.


Posted By: MINTEVENTRESOURCES
Date Posted: 17 April 2017 at 3:39pm
Lev thanks again. For now I will have to keep the box. In time we shall build a better product. I shall keep you posted with any further results.

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Mint Event Resources


Posted By: bee
Date Posted: 17 April 2017 at 8:30pm
I would look to close the throat opening a bit, the 9601 will give you more than your current driver, there is other cheaper driver options too, that would give you more. But a driver change alone wont cure your issues..

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https://www.elements-audio.com


Posted By: MINTEVENTRESOURCES
Date Posted: 17 April 2017 at 10:03pm
Originally posted by bee bee wrote:

I would look to close the throat opening a bit, the 9601 will give you more than your current driver, there is other cheaper driver options too, that would give you more. But a driver change alone wont cure your issues..

I am open to all driver suggestions. I will take a look at closing the throat opening, combined with a dog leg, as well as a second baffle behind the first baffle. Closer to the dimensions of the super scoop. Shall you think it is a bad idea please advise. 


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Mint Event Resources


Posted By: JR.junior
Date Posted: 18 April 2017 at 11:09am
Originally posted by MINTEVENTRESOURCES MINTEVENTRESOURCES wrote:


Pictures..



very bad scoop design..you cant do much, to get good sound out from this. build a new scoop man..plenty good scoop designs out there on the web.


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Support the scoop technology, larger mouth plays louder!


Posted By: turbo7
Date Posted: 18 April 2017 at 4:00pm
omg what is this ?? what kind of strange chamber baffle is in there ! can you take a closer pic of the chamber ?



Posted By: MINTEVENTRESOURCES
Date Posted: 18 April 2017 at 4:48pm
What do you mean by strange chamber baffle? Did you view all of the pictures as I am sure its the viewing angle which is throwing you off. As explained earlier one of the issues is the length of the baffle. Is that what you are discussing? Furthermore, please keep in mind that I have listened to and played on a to of scoops. This box doesn't sound bad at all. I am merely looking for more output and pressure. I have heard many of the scoops that are discussed in this forum and they sound and look horrible. 





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Mint Event Resources


Posted By: Dub Specialist Sound
Date Posted: 18 April 2017 at 9:22pm
Also ppls havent mentioned

we dont know all internals build iether, with delflector/s or none , how high/size that up angle panel goes,

there just more to it than just throat and rear baffle size, litres , neg/or uniformed horn path ect

i was gona say try and give it a go on that throat, but tbh, it looks very close to the front baffle,

so yu probley struggle to get one in, with hindering to get yu driver in

imho new build....




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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...


Posted By: turbo7
Date Posted: 18 April 2017 at 11:46pm
ok i have just spotted the pics. The design does not really excel compared to contenders, i also see not really much hornlenght which is strange because it should equalize the bass frequencies more instead of the sub, means the opposite what you are telling us.

The 9601, if it fits and if you have the right amount of preferably class H/G or "best impedance" class D power will work in nearly every scoop, but i would also say rebuild to your drivers needs, or take the advice given and leave driver + design behind you.


Posted By: MINTEVENTRESOURCES
Date Posted: 19 April 2017 at 12:05am
Originally posted by turbo7 turbo7 wrote:

ok i have just spotted the pics. The design does not really excel compared to contenders, i also see not really much hornlenght which is strange because it should equalize the bass frequencies more instead of the sub, means the opposite what you are telling us.

The 9601, if it fits and if you have the right amount of preferably class H/G or "best impedance" class D power will work in nearly every scoop, but i would also say rebuild to your drivers need


The box is most happy around 50s to 60s but plays full spectrum of 25 to 95 or so with no problems. No bottoming out. No farting. The box also doesn't sound slow like a lot of the scoops I have heard. It lacks one issue high pressure. I used 3 boxes and filled a 15,000 sq ft venue with bass without using my main tops with are JBL PD 6322. It's almost like the pressure is stuck in the box. With that said I will take a look at the throats and if all else fails use them as is. I will also try my Crown Itech HD amps on the box and see if there is a difference.

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Mint Event Resources


Posted By: turbo7
Date Posted: 19 April 2017 at 12:13am
its only 57 cm internal, too. A typical problem is: where does the horn start ? It probably is just more added volume to your rear chamber than you think... a bad rear chamber / throat match can result in up to about 20cm less hornlenght. if say, 200cm horn lenght, and 57cm wide, it is more of a small scoop with large throat and large rear chamber volume, and will loose very easy against f.ex. super scoop+v18


Posted By: toastyghost
Date Posted: 19 April 2017 at 12:50am
If the pressure is 'stuck in the box' then you're likely losing loads of energy into the poorly braced cabinet.


Posted By: JR.junior
Date Posted: 20 April 2017 at 7:18am
scoops with a such big compression chamber have bad coupling to the air into the horn...need plenty of cone movement to get any spl.. starts pumping air efficient at relative higher frequencies, one noted scoop.

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Support the scoop technology, larger mouth plays louder!


Posted By: flinnt45
Date Posted: 21 April 2017 at 9:24am
Hi Mint
Driver with a big vas is required, good low resonance , reasonable qts
RCF l8x400 might suit, you could experiment with the baffle behind the driver, superimpose another on to it, slightly loose around its perimeter so that you can move it, couple of mm should do and move it down by degree,s to reduce the throat size, reduce to 150mm then 125 mm etc this should affect the spl in the desired manner

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JAH Kreator Hi Fi


Posted By: MINTEVENTRESOURCES
Date Posted: 21 April 2017 at 12:48pm
Originally posted by flinnt45 flinnt45 wrote:

Hi Mint
Driver with a big vas is required, good low resonance , reasonable qts
RCF l8x400 might suit, you could experiment with the baffle behind the driver, superimpose another on to it, slightly loose around its perimeter so that you can move it, couple of mm should do and move it down by degree,s to reduce the throat size, reduce to 150mm then 125 mm etc this should affect the spl in the desired manner


Hello Flinnt45,

Thanks! To confirm the driver you are referring to is the RCF LF18X400? Next adding the baffle behind the first baffle is understood. At the point of moving the baffle down a degree is where you lost me. Are we still discussing the first baffle or now speaking about the second baffle? Please advise, thanks.

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Mint Event Resources


Posted By: flinnt45
Date Posted: 27 April 2017 at 6:11pm
Yes Driver confirmed, the baffle in question is the one BEHIND the driver BEHIND the magnet it has the slot at the bottom, which forms the throat, another driver to consider and easily obtainable for you is EVX180B large vas, low qts, reasonable low frequency response, but you will electronically restrict its response to around 35hz so should be ok

Best.....Ian

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JAH Kreator Hi Fi


Posted By: MINTEVENTRESOURCES
Date Posted: 27 April 2017 at 9:25pm
Thanks,

I have panels to insert on the rear baffle which will close the chamber and I will adjust and close the throat to the desired opening somewhere around 4.9 inches. I also have the EV 180 in our warehouse so I will be giving it a shot. I will update everyone!

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Mint Event Resources


Posted By: MINTEVENTRESOURCES
Date Posted: 15 May 2017 at 4:52pm
Hello All, 

I was able to add 1 inch thickness to the second baffle and close the throat to about 4.5inches or 114.3mm. Making the depth behind the speaker smaller. This increased the SPL. I will add a few braces in the chamber to secure all added pieces of wood. Lastly, I will continue to give other speakers a shot until I find even better performance. As always I will keep everyone updated and send pictures once I have completed everything. 


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Mint Event Resources



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