"Bret Ludwig" wrote in message
oups.com...
Arny Krueger wrote:
"John Atkinson" wrote in message
oups.com...

I haven't been impressed with speakers using the Manger driver at
Shows,
mainly due to its chronic lack of sensitivity.

http://www.manger-msw.com/en/produkte/index.html

Manger gives the sensitivity of their driver as 91 dB/watt. That would be
average or slightly above-average sensitivity, no?

Today yes. But dismal.

Bret, your lond-winded post just goes to show that you are unclear about the
meaning of simple words like "average".

http://home.comcast.net/~wooferboy/Page_3.html

snip totally irrelevant info

The first system is based on the JBL 2123J, a 16 Ohm, 10" high
efficiency midrange driver with an advertised sensitivity (based on a
signal swept from 500-2500Hz) of 101dB/W/m.

It's unclear whether this is vendor spec (and therefore questionable) or
based on an actual test by a horn-speaker bigot (and therefore highly
questionable).

The arrangement consists of
a pair of 2123Js mated to a single Klipschorn bass unit. The paired
arrangement, with each driver mounted in a sealed enclosure, will
achieve a theoretical sensitivity of 104dB/W/m.

Key word - *theretical*. IOW, not actual by any reasonable stretch of the
imagination. Therefore its an extremely questionable number.

The data sheet for the
2123J is proved in the pull-down menu below.

Given that the average efficiency of a good-quality stage monitor is about
99 dB, one might wonder why anybody would find 101 dB to be worth bragging
about.