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Vintage Speaker efficiency ratings !!!

174.131.161.16

Posted by MichaelV* on February 21, 2011 at 16:13:48

In Reply to: PLEASE post the Vintage Speaker efficiency ratings !!! posted by Interstage Tranny on February 21, 2011 at 07:45:19:

High Fidelity
----------------------------------
SPL at - Approx Pwr - Name
1 Watt - for 100 db - -
-------------------------------------------------------
83 db - 50 watts - AR LST
82 db - 60 w - AR 2ax
83 db - 50 w - AR 6
84 db - 40 w - AR 7
81 db - 80 w - Smaller Advent
86 db - 25 w - ADC 303B
82 db - 60 w - Audioanalyst A100
84 db - 40 w - B&O 5700
84 db - 40 w - Bose 501
86 db - 25 w - Dyna A50
85 db - 30 w - Dyna A 10
89 db - 12 w - Empire 7500M
86 db - 25 w - ESS Heil AMT-1
87 db - 20 w - ESS Transtatic I
82 db - 60 w - Fisher WS-80
83 db - 50 w - Fisher ST-550
86 db - 25 w - Frazier Mk. VI
82 db - 60 w - IMF Monitor Mk II
83 db - 50 w - Infinity 1001
85 db - 30 w - Infinity T-L Monitor
87 db - 20 w - JBL 100
85 db - 30 w - KLH 33
90 db - 10 w - Laf. Criterion 200A
88 db - 16 w - Leak Mk. III
92 db - 6 w - LDL 749
89 db - 12 w - Marantz Imperial?
84 db- 40 w - Onkyo 20
90 db - 10 w - Pioneer R-700
85 db - 30 w - Tannoy Orbitus
83 db - 50 w - Wharfedale W60E

Other Sources
83 db - 50 w - AR3A
83 db - 50 w - AR5
83 db - 50 w - Large Advent
83 db - 50 w - ADC 303A
85 db - 30 w - ADC 303AX
86 db - 25 w - Altec 887A
88 db - 16 w - Altec 892A
87 db - 20 w - Altec 893B
82 db - 60 w - Dyna A25
85 db - 30 w - Dyna A35
82 db - 60 w - EPI 100
82 db - 60 w - EPI 50
83 db - 50 w - EPI 150
88 db - 16 w - Fairfax FX300
88 db - 16 w - Fisher XP65B
87 db - 20 w - Jensen 2
86 db - 25 w - Jensen 3
86 db - 25 w - Jensen 4
90 db - 10 w - JVC 5322
83 db - 50 w - KLH 5
87 db - 20 w - KLH 6
88 db - 16 w - KLH 17
83 db - 50 w - KLH 32
83 db - 50 w - KLH 38
88 db - 16 w - Laf. Criterion 4x
89 db - 12 w - Laf. Criterion 5xa
87 db - 20 w - Laf. Criterion 6
85 db - 30 w - Marantz Imperial 5G
83 db - 50 w - Microacoustic10
86 db - 25 w - R. Shack Optimus 1
86 db - 25 w - R. Shack Optimus 5
89 db - 12 w - Pioneer R-300
85 db - 30 w - Rectilinear Mini-III
87 db - 20 w - Scott S-15

General Comment: Old loudspeakers were relatively more efficient in the past. Atkinson tested Smaller Advents in 2006 and found one to be 84.5 db and the other 85.5. That is significantly more efficient than what whoever tested the Smaller Advents for High Fidelity measured. Who is correct? Who knows, but IMO we are getting less efficient speakers nowadays than in the past. Does that make them worse? Of course not. Most of these older speakers are far worse overall performers than the average of what you will find today. Also, almost everyone can afford a 100 wpc amp nowadays, so efficiency will not be an issue for most people.

One thing more. I had AR3As and they needed more than 50 wpc for what I played. More like 100. Also, I had KLH 6s and they needed more like 50 wpc, not 20w. Also, I'd be very surprised if the Dyna 25s could play as loud as 100 db without distorting. Mine didn't seem to.

PS formatted fine in Word. Trouble pasting, sorry.

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Schiit Audio

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