Lowthers PM6a in BK20 Enclosure - diyAudio
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Old 29th December 2013, 07:58 PM   #1
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Default Lowthers PM6a in BK20 Enclosure

Does anyone know if a Lowther PM6a will working in the Madisound BK20 enclosure?

Thanks,

Vince
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Old 31st December 2013, 06:59 PM   #2
freddi is offline freddi  United States
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I think it would play ok in a BK20 - a Karlson enclosure may have more impact and sound more solid than a blh in the BK20 bulk range. The "Karlsonator" design by Greg B. may also be a consideration - - XRK971 could run the PM6A numbers through akabak for a relative reading.

you could run your PM6A through hornresp with BK20's expansion

fwiw here's my BK20 with a cheap ~2% efficient Sammi 8 inch


outdoors measurements - Blue ~ ground plane, green = mouth open, violet = mouth blocked
Click the image to open in full size.

indoors - Sammi/BK20 w. helper tweeter vs a Klipsch Heresy I - equal drive and similar positions in the room. The Heresy was elevated from the floor by around 14 inches IIRC. Despite the poor graph for the Heresy, I would give it pretty good marks for overall sound as long as the grill is removed and speaker placed on a wall/elevated to ear level. IMO, H1 sounds better than some single drivers. H1 can use some crossover tweaks.

Click the image to open in full size.

helper tweeter lead reversal effect at one mic position
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Last edited by freddi; 31st December 2013 at 07:16 PM.
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Old 31st December 2013, 09:32 PM   #3
xrk971 is offline xrk971  United States
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Default PM6A in full-scale Karlsonator

Speaker is 60 in away from back wall.

Looks like a full scale Karlsonator can work with the PM6A.

SPL vs Freq, Impedance, Cone Displacement
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File Type: png Karlsonator-15x-PM6A-Freq-1m.png (25.9 KB, 194 views)
File Type: png Karlsonator-15x-PM6A-Impedance.png (19.1 KB, 193 views)
File Type: png Karlsonator-15x-PM6A-Displ.png (19.8 KB, 16 views)
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Old 1st January 2014, 12:45 AM   #4
freddi is offline freddi  United States
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how would PM6A look in GB's Karlsonator 8? - would it differ much from FE206EN?
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Old 1st January 2014, 01:09 AM   #5
xrk971 is offline xrk971  United States
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Is the Karlsonator 8 the same as a the Karlsonator but scaled by 8/15?
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Old 1st January 2014, 01:29 AM   #6
Greg B is offline Greg B  United States
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No, it's slightly differently proportioned, and about .85 scale overall. Roughly: width 79%, depth 85%, height 90%. I was trying to get decent response with an FE206EN and my crude sim technique.

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Old 2nd January 2014, 03:24 AM   #7
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i built Lowther DX3 in transmisionline box

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