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doober View Drop Down
Young Croc
Young Croc
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Joined: 03 January 2006
Location: Cornwall UK
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Points: 1123 		Post Options Post Options   Thanks (0) Thanks(0)   Quote doober Quote  Post ReplyReply Direct Link To This Post 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?
Blahblahblah
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dlyxover View Drop Down
Old Croc
Old Croc


Joined: 14 June 2007
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Points: 1526 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post 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.
Lignum_ww@icloud.com
GNKaudio@icloud.com
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doober View Drop Down
Young Croc
Young Croc
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Joined: 03 January 2006
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Points: 1123 		Post Options Post Options   Thanks (0) Thanks(0)   Quote doober Quote  Post ReplyReply Direct Link To This Post 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!
Blahblahblah
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smitske96 View Drop Down
Young Croc
Young Croc


Joined: 16 February 2016
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Points: 1217 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 22 September 2020 at 3:01pm
Try the 4550 Wink
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dlyxover View Drop Down
Old Croc
Old Croc


Joined: 14 June 2007
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Points: 1526 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post 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
Lignum_ww@icloud.com
GNKaudio@icloud.com
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dlyxover View Drop Down
Old Croc
Old Croc


Joined: 14 June 2007
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Points: 1526 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post 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
Lignum_ww@icloud.com
GNKaudio@icloud.com
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smitske96 View Drop Down
Young Croc
Young Croc


Joined: 16 February 2016
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Points: 1217 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 22 September 2020 at 6:43pm
A little more expensive but they also have the newer 5530ND, diamater is only 72mm.
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dlyxover View Drop Down
Old Croc
Old Croc


Joined: 14 June 2007
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Points: 1526 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post 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
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smitske96 View Drop Down
Young Croc
Young Croc


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Points: 1217 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post 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
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dlyxover View Drop Down
Old Croc
Old Croc


Joined: 14 June 2007
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Points: 1526 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post 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
Lignum_ww@icloud.com
GNKaudio@icloud.com
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dlyxover View Drop Down
Old Croc
Old Croc


Joined: 14 June 2007
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Points: 1526 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2025 at 12:59am
Lignum_ww@icloud.com
GNKaudio@icloud.com
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FOO View Drop Down
Young Croc
Young Croc
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Joined: 23 December 2018
Location: Denmark
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Points: 949 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FOO Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2025 at 9:35am
Very nice... Ports hidden in the handles?
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