| Basshorn driver specs [message #17017] |
Sun, 03 October 2004 09:57  |
Kevin Jordan
Messages: 20
Registered: May 2009
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Chancellor |
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On the subject of basshorns, there seems to be two schools of thought. The traditional
"old school" method is to use large, stiff, high fs, low xmax woofers. The reasons
stated for this choice are that the horn makes the bass and excursion isn't required because
the horn transforms high pressure low excursion at the cone into low pressure high volume
at the mouth. Then there is a new school of though that uses small, compliant, low fs,
high xmax woofers. The reasons stated for this choice are that even though excursion is
reduced, the deepest bass requires excursion anyway, more than is possible with the
old school stiff drivers. They say the use of high fs, low xmax drivers is largely due to
folklore and should be avoided. With drivers like the LAB12 (fs=22, xmax=13mm)
and the HL10 (fs=32, xmax=11mm), it would seem the common trend is towards
low fs, high xmax drivers for basshorns, just like for other bass speaker designs.
What are your thoughts here?
Rgs,
Kevin
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| Re: Basshorn driver specs [message #17018 is a reply to message #17017] |
Sun, 03 October 2004 18:36  |
Mike.e
Messages: 471
Registered: May 2009
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Illuminati (1st Degree) |
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Hi Kevin Your right there is new and old school. Xmax is easier to get these days- and smaller drivers can be used. My opinion-use the best driver for the task! A linear 12" of lab12 specs will perform very well on a horn of limited bandwidth and high efficiency. ML util program asks for this driver with given 30hz horn!
Hornresp models it up well! The high BL drivers do the high end more effectively but require a long horn to achieve the same lows as the lower Bl drivers like lab12 All that remains is -is there any sound difference between these 2 drivers? i would say in theory no. high/low Qms,BL,Moving mass, some say you can hear a difference,i dont see any AES articles on it.. with a lab12 driver you can have a small rear chamber which provides some linearity to prevent relying on the driver spider linearity alone! Also reactance annulling can happen. Cheers!
Mike.e
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