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Old 16th January 2014, 10:47 AM   #1
hm is offline hm  Europe
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Default Mini Posaune

Hello,

i ´ve done the Mini Posaune for 3" fullrange drivers.

Free plan in german but understandable:
Hörner

down 35 Hz, soundstage like a omnidirectional driver, near 90 dB 1 W1m.
Attached Images
File Type: jpg miniposaune1web.jpg (341.8 KB, 684 views)
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Old 16th January 2014, 12:06 PM   #2
xrk971 is offline xrk971  United States
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Hm,
Looks very nice. Can you share measurements? What driver are you using?
Regards,
X
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Old 16th January 2014, 12:36 PM   #3
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Default imp undamped

hello,

my carpenter take a few undamped measurements,
next month he will take new measurements.

1 the sum imp will smooth the peaks ~170 Hz+220 Hz with damping.
2 fronthorn
3 rearhorn

front driver: http://www.aos-lautsprecher.de/pdf/c...DB10WB0824.pdf
rear driver: invers changed + -
http://www.scan-speak.dk/datasheet/pdf/10f-8414g10.pdf
Attached Images
File Type: jpg MiniPosauneimp.jpg (53.8 KB, 602 views)
File Type: jpg MiniPo_FrontImp.jpg (60.1 KB, 555 views)
File Type: jpg MiniPo_RearImp.jpg (58.1 KB, 546 views)
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Last edited by hm; 16th January 2014 at 12:44 PM.
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Old 16th January 2014, 12:43 PM   #4
xrk971 is offline xrk971  United States
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What driver are you using - appears to be two 4 ohm drivers in series and configured as bipole omni? No frequency response measurements? Otherwise how do you know it is 35 Hz and 90dB?
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Old 16th January 2014, 12:52 PM   #5
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how?
two 8 Ohm parallel it is a bipol, in serie it is a dipol and does not work so well,
you can see a few other graphs on the link, but because it is undamped
it it not compairable, look there.
experience and i compair with RDH20 and Bassel with Flute, by test cd´s
the rear driver could be a cheap one, EBP > 120

The mini Posaune is the smallest of five constructions look my HP
Kornett, Posaune
posaune
kornett
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Old 16th January 2014, 01:05 PM   #6
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No, parallel vs series connection only sets the overall impedance, the polarity of the drivers and how they are mounted make it a bipole or dipole. From your impedence plots it looks like nominal 8 ohms. If two drivers are connected, it would mean they are 4 ohms in series. Since you say it acts like omni, I assume the driver polarity and mounting is such that both cones push out for a positive pulse input? From what I have seen in your past builds, the driver on the back side tends to be mounted with magnet out, so for a bipole, the polarity on rear driver is reversed?
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Old 16th January 2014, 01:37 PM   #7
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Default Bipol

yes,
you see the small magnet on pic of the rear driver, because invers montage
polarity changed.

same as Kornett
Attached Images
File Type: jpg seitekornett2.jpg (276.2 KB, 514 views)
File Type: jpg kornetthin1web.jpg (32.7 KB, 267 views)
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Old 23rd January 2014, 10:43 PM   #8
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Default undamped measurement

1w 1m a few deg. out off axis, time cut.
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File Type: jpg MiniPo_1Meterweb.jpg (92.5 KB, 235 views)
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Old 22nd February 2014, 09:34 PM   #9
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Default IMP Measurement

Hello,
here the damped IMP
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File Type: jpg minipoImp.jpg (78.5 KB, 92 views)
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Old 24th February 2014, 09:29 PM   #10
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Default Measurement

Hello,

here the frequenz plot, much bass by placing near a wall and
on a concret 50x50x5 cm 30 Kg, on carpet the bass gets a bit
warmer.
The max. Spl 95 dB, ~3-4 W, stroke ~1,5-2 mm, down 35 Hz,
my room 22 qm.

Every Test listener said, two 3" unbelieveable.

sound near the Kangling.
Kangling double horn technic
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File Type: jpg minipo1m0°.jpg (107.7 KB, 84 views)
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