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LA5

Printed From: Speakerplans.com
Category: Plans
Forum Name: New Projects Forum
Forum Description: Forum for new speakerplans projects, in memory of Tony Wilkes, 1953 - 2014
URL: https://forum.speakerplans.com/forum_posts.asp?TID=105662
Printed Date: 26 March 2026 at 5:29pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com


Topic: LA5
Posted By: dlyxover
Subject: LA5
Date Posted: 02 September 2020 at 1:12am
2x5" + 1"

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https://ibb.co/Hr9R0Kc" rel="nofollow">
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Lignum_ww@icloud.com
GNKaudio@icloud.com



Replies:
Posted By: JonB67
Date Posted: 02 September 2020 at 8:00am
Very nice!  What's the hf? Intrigued. 


Posted By: dlyxover
Date Posted: 02 September 2020 at 10:58am
I'm using a BMS 4538 on a 18sound XG10 waveguide

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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: njw
Date Posted: 05 September 2020 at 10:04pm
 That's cute, what are the dimensions?


Posted By: MarjanM
Date Posted: 05 September 2020 at 11:45pm
Originally posted by dlyxover dlyxover wrote:

I'm using a BMS 4538 on a 18sound XG10 waveguide
Can you please post the raw frequency response of the HF with no eq and no HPF?
I am just curious how that combo works.


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


Posted By: dlyxover
Date Posted: 06 September 2020 at 5:21pm
Originally posted by njw njw wrote:

 That's cute, what are the dimensions?

They are 400mm wide, 168mm high and 296mm deep
 
I'll take measurement for you tomorrow MarjanM


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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: dlyxover
Date Posted: 16 September 2020 at 6:49pm
Received some torx head bolts I had manufactured.

A4 stainless steel black passivated.



MarjanM not been able to take any measurements should get it by the end of the week.


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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: MarjanM
Date Posted: 16 September 2020 at 7:13pm
Its cool man. No rush. :)

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


Posted By: dlyxover
Date Posted: 20 September 2020 at 2:23pm
below is the measurement with no filtering (orange) and filtered and 2 eq points (purple) of the HF unit.





-------------
Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: MarjanM
Date Posted: 20 September 2020 at 4:13pm
Thank you. Looks like a good match.

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


Posted By: doober
Date Posted: 20 September 2020 at 9:14pm
Very neat, I like it. Are you running both 5" drivers up to the crossover to the comp?

What eq did you use? Is it a high shelf boost and a parametric cut lower down?

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Blahblahblah


Posted By: dlyxover
Date Posted: 20 September 2020 at 9:52pm
Originally posted by doober doober wrote:

Very neat, I like it. Are you running both 5" drivers up to the crossover to the comp?

What eq did you use? Is it a high shelf boost and a parametric cut lower down?

Thank you.

Yes, both 5" drivers are going upto the comp.

Using a parametric cut and a high shelf boost



No Eq on the 5", the LPF doesn't meet the 1" HPF; found a slight gap improved the response and phase.



The 5" & 1" together




-------------
Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: doober
Date Posted: 21 September 2020 at 7:48pm
Thanks for the info. Your EQ looks very similar to what I've tried on my home made waveguide with a BMS 4538. Response looks similar too. That's great news for me.

The reason I asked if both 5" drivers are run together relates to off axis response, something else I've been looking into recently. My calculations suggest that you will get -6dB at 45 degrees off axis, at around 625Hz. This is based on a guess that your drivers are 260mm centre to centre. I haven't tested this calculation yet- have you noticed this dip at all?

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Blahblahblah


Posted By: dlyxover
Date Posted: 21 September 2020 at 9:52pm
I was curious if that is common with this type of wave guide.

The driver centres is 251mm (good guess), I haven't noticed any significant nulls when listening; not measured off axis yet.

There is a 7db dip @ 600hz but also @ 300hz, and 220hz, put this down to the measuring environment as the continuity gets skittish at those points also.


Have a BMS 4524 I'm going to try.


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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: doober
Date Posted: 22 September 2020 at 1:19pm
I just realised I calculated that wrong, the dip would be at 1250Hz. Possibly, if I got the theory and calculation right this time!

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Blahblahblah


Posted By: smitske96
Date Posted: 22 September 2020 at 3:01pm
Try the 4550 Wink


Posted By: dlyxover
Date Posted: 22 September 2020 at 3:38pm
Originally posted by smitske96 smitske96 wrote:

Try the 4550 Wink


its too big, won't fit in enclosure on the waveguide, was going to use a 4544 intiailly but it I also too large


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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: dlyxover
Date Posted: 22 September 2020 at 6:30pm
put the 4524 into today

unprocessed
Orange 4538
pink 4524


processed
purple 4538
green 4524


5" & 1
grey with 4538
yellow with 4524




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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: smitske96
Date Posted: 22 September 2020 at 6:43pm
A little more expensive but they also have the newer 5530ND, diamater is only 72mm.




Posted By: dlyxover
Date Posted: 22 September 2020 at 6:56pm
dose look like a good candidate, really don't need that much power as the 5" drivers are only 80w each

-------------
Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: smitske96
Date Posted: 22 September 2020 at 7:10pm
But you can cross it lower if needed. Also headroom is always a good thing. 
Running them at lower power also means less distortion Smile


Posted By: dlyxover
Date Posted: 22 September 2020 at 8:38pm
Originally posted by smitske96 smitske96 wrote:

But you can cross it lower if needed. Also headroom is always a good thing. 
Running them at lower power also means less distortion Smile

your not wrong


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Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: dlyxover
Date Posted: 11 December 2025 at 12:59am


-------------
Lignum_ww@icloud.com
GNKaudio@icloud.com


Posted By: FOO
Date Posted: 11 December 2025 at 9:35am
Very nice... Ports hidden in the handles?


Posted By: dlyxover
Date Posted: 13 December 2025 at 10:54am
yeh, to try and prevent water ingress



-------------
Lignum_ww@icloud.com
GNKaudio@icloud.com



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