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16th May 2009, 01:19 AM
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#1 |
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diyAudio Member
Join Date: Oct 2003
Location: Optical Valley
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Alpair 6 Bass Reflex Bookshelf
This is only a preview.
My sister wanted a pair of new speakers. Have to be small, bookshelf, but enough SPL for small room (20 sq m). After some searching and consideration, I settled for a 6.5 litre bass reflex with the Alpair 6. The pipe is 36mm ID and 103mm long (excluding the bellmouth). The form and construction is well known. No BSC, but a 4ohm 10W metal film in series, for now. Outside dimensions approximately 200mm x 276mm x 305mm. Walls lined with single layer of sonofil. Here is the prototype unfinished (still need to sand and spray). Absolutely gorgious thing (and not only the look). Thanks to MarkAudio for a great product. We are going to build 10 pairs of these. We'll publish open-air measurement when we get a weekend without rain and with free time. Patrick |
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16th May 2009, 04:48 AM
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#3 |
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diyAudio Member
Join Date: Nov 2003
Location: iowa
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beautiful !!!!!!!!!!!!!!!!!
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16th May 2009, 07:32 AM
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#4 |
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diyAudio Member
Join Date: Oct 2003
Location: Optical Valley
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It'll take us till July, or later, to be able to posted everything, including measurements and pictures of a full finished article (with custon design stands). In the meantime, pls bear with us.
Patrick PS One thing we shall not publish is the drawing, to avoid us getting into trouble with a certain speaker manufacturer.  |
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16th May 2009, 11:08 PM
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#9 | |
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GlassFET
diyAudio Member
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Quote:
They are 4 ohm drivers. Many tube amps would have a fit Cheers!
__________________
-= Gregg =- "Ratings are for transistors...tubes have guidelines" Hobby and communites - GeeK ZonE Commercial site - classicvalve.ca diyAudio Blog - GeeK's Bench |
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17th May 2009, 02:04 AM
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#10 |
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diyAudio Member
Join Date: Oct 2003
Location: Optical Valley
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> why the resistor?
Very good question. To raise HF by some 4dB. Partly determined from measurement (which was masked by too much room acoustics, hence the need to repeat outdoors). But we have also listened to different values from 2 to 5 ohms, and came back to 4 in the end. Patrick |
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