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Speaker Codes & Applications

 

This page is a collection of odds and ends information relating to speakers and speaker implementation. You might find some of the information useful in determining which speaker would be best suited to your application.

Speaker Codes And What They Mean

Speaker Code

The picture is a section of the basket rim of a speaker. The 6 digit code indicates what manufacturer made the speaker and when it was made. It is called the ‘Manufacture Date Code’.

Here is a list of some of the speaker manufacturers and their EIA codes:

Credence 117
Plye 1098         
Rola 285
Eminence 67
CTS 137
EV 649
Oxford 465
Altec/Lansing           391
Utah 328
Quam 270
Jensen 220
Weber 1279
Cleveland 433

 

So, the speaker in the image above would have been made by Jensen (220) during the 27th week of 1951 or 1961. The year is confusing because it is only a single digit. In later years, the EIA converted to a 4 digit date code so the year could be easily identified. There are 2 acceptable methods of displaying the EIA date code, with or without a hyphen between the manufacture code and the year/week code. Some manufacturers also attached other letters to the end of the date code to indicate day of the week, work shift, serial number, lot number, etc. The EIA only specifies manufacturer and year/week code. Anything else is at the discretion of the manufacturer.

Click here for more Manufacturer Codes

 

Speaker Implementation and Amplifier Configurations If you would like to add some info to this list, (any company, any model) feel free to write us with the info. Thank you.

Amp Model Amp Config Speaker Configuration Replacement Speakers
Ampeg Gemini I
’64-71
2-7591
Cath Bias
20W
1-12″, 8 Ohm
Jensen C12Q, C12N
Jensen EM1201 
JBL D-120F
12A125, 12F125
12A150, 12F150
Ampeg Gemini II
’65-71
2-7591
Fixed Bias
30W
1-15″, 8 Ohm
Jensen C15N, EM1500 or EM1502
JBL D-130F
15A150, C15N
Ampeg Super Echo Twin
’63-64
4-7591
Fixed Bias
30W mono
15W per side
2-12″, 8 Ohm
Jensen C12Q or EM1201
12A125, 12F125
Ampeg B15N
’61-67
2-6L6
Cath Bias
25W
1-15″, 8 Ohm
Jensen C15N
Cleveland, CTS sq mag.
Altec, JBL D-130F
15A150 for guitar
Bass15F for bass 
Ampeg B15N
’67-79
2-6L6
Fixed Bias
30W
1-15″, 8 Ohm
Jensen C15N
Cleveland, CTS sq mag.
Altec 421-A, JBL D-130F
15A150, C15N
Ampeg Jet
’57-63
2-6V6
Cath Bias
12W
1-12″, 8 Ohm
Jensen P12R or P12S
12A100,
Ampeg Jet
’63-69
2-7591
Cath Bias
15W
1-12″, 8 Ohm
Jensen C12R, CTS AlNiCo, Quam
12A100,
Ampeg
Reverberocket
’61-63
2-6V6
Cath Bias
15W
1-12″, 8 Ohm
Jensen P12S, P12R, C12R
12A100,
Ampeg
Reverberocket
’63-68
2-7591
Cath Bias
15W
1-12″, 8 Ohm
Jensen C12R
or CTS
12A100,
Ampeg
Reverbojet
’67-69
2-7591
Cath Bias
18W
1-12″, 8 Ohm
Jensen C12Q, CTS AlNiCo
12A125, 12F125
Bandmaster, Tweed
’53-55
2-6L6
Cath Bias
25W
No -fb
1-15″, 8 Ohm
Jensen P15N
15A150, C15N
Bandmaster, Tweed
&
Brown
’55-60
2-6L6
Fixed Bias
30W
3-10″, 8 Ohm
Jensen P10R or P10Q
10A100,
10A125, 10F125
Bandmaster, Blonde
’60-63
2-6L6
Fixed Bias
40W
2-12″, 8 Ohm
piggyback
Oxford 12M6-4
Jensen C12N
12A125, 12F125
12A150, 12F150
Bandmaster, White
’62
2-6L6
Fixed Bias
30W
-fb
2-12″, 8 Ohm
piggyback
Oxford 12K5R-1
12A125, 12F125
12A150, 12F150
Bandmaster, Black
&
Silver
’63-74
2-6L6
Fixed Bias
40W
2-12″, 8 Ohm
piggyback
Oxford 12T6
Jensen C12N
12A125, 12F125
12A150, 12F150
Bassman, Tweed
’55-’58
2-6L6
Fixed Bias
30W
-fb
4-10″, 8 Ohm
all in parallel
Jensen P10R
10A100,
Bassman, Tweed
’58-’60
2-6L6
Fixed Bias
40W
-fb
4-10″, 8 Ohm
all in parallel
Jensen P10R or P10Q
10A100,
10A125, 10F125
Bassman, Brown &
Blonde
’61-’62
2-6L6
Fixed Bias
40W
-fb
2-12″, 8 Ohm
Jensen C12N
Oxford 12M5-6
12F150, 12A150
Bassman, Black
’63-’67
2-6L6
Fixed Bias
40W
-fb
2-12″, 8 Ohm
in parallel
in piggyback, sealed cabinet
Oxford, Jensen, Utah
12A150, 12F150
Chicago 12,Texas 12
Bassman, Silver
’67-’68
2-6L6
Fixed Bias
40W
-fb
2-12″, 8 Ohm
in parallel
in piggyback, sealed cabinet
Oxford, Utah
12A150, 12F150
Chicago 12,Texas 12
Bassman, Silver
’68-’80
2-6L6
Fixed Bias
40W
-fb
2-15″, 8 Ohm
in parallel
in larger piggyback, sealed cabinet
15A150, 15F150
Chicago 15,Texas 15
Bassman, Silver 10
’72-’82
2-6L6
Fixed Bias
40W
-fb
4-10″, 32 Ohm
in parallel
or 8 Ohm series/parallel
10A150, 10F150
Chicago 10,Texas
wired series/parallel
Champ, Tweed
’53-’55
1-6V6
Cath Bias
5W
No -fb
1-6″, ? Ohm
Cleveland or Jensen P6T
Champ, Tweed
’55-’64
1-6V6
Cath Bias
5W
-fb
1-8″, 3.2 Ohm
Oxford, Jensen, CTS P8T
Alnico Signature 8S
Champ, Black
’64-’67
1-6V6
Cath Bias
5W
-fb
1-8″, 3.2 Ohm
Oxford 8EV
Alnico Signature 8S
Champ, II
’82-’83
2-6V6
Fixed Bias
17W
-fb
1-10″, 8 Ohm

10A125, 10F125

 


Amp Model Amp Config Speaker Configuration Replacement Speakers
Champ, II
’82-’83
2-6V6
Fixed Bias
17W
-fb
1-10″, 8 Ohm 10A125, 10F125
Champ, Super
’82-’85
2-6V6
Fixed Bias
17W
-fb
1-10″, 8 Ohm 10A125, 10F125
Champ, 12
’87-’92
1-6L6
Cath Bias
10W
-fb
1-12″, 8 Ohm P12R, C12R
12A125, 12F125
Champ, 25SE
’92-’94
2-6L6
Fixed Bias
25W
-fb
1-12″, 8 Ohm 12A150, 12F150
Deluxe, Tweed
’48-’60
2-6V6
Cath Bias
12W
No -fb
1-12″, 8 Ohm
Jensen P12R
Some had P12Q
12A100,
12A125, 12F125
Deluxe, Brown
’61-’63
2-6V6
Fixed Bias
20W
-fb
1-12″, 8 Ohm
Oxford 12K5-3
12A125, 12F125
Deluxe, Black
’63-’66
2-6V6
Fixed Bias
23W
-fb
1-12″, 8 Ohm
Oxford 12K5-6
12A125, 12F125
Leslie 16
Fender Vibratone
Non
Amplified
1-10″, 4 Ohm
Utah V10R9
10A150, 10F150
4 Ohm Model
Princeton, Tweed
’48-’54
1-6V6
Cath Bias
5W
No -fb
1-8″, 3.2 Ohm?
Jensen, Cleveland P8T
AlNiCo Sig 8-
Princeton, Tweed
’54-’60
1-6V6
Cath Bias
5W
-fb
1-8″, 3.2 Ohm?
Jensen P8T
Oxford 8EV-29
-AlNiCo Sig 8
Princeton, Brown
’61-’63
2-6V6
Fixed Bias
15W
-fb
1-10″, 8 Ohm
Oxford 10J4-2
10A100,
Princeton, Black
’64-’67
2-6V6
Fixed Bias
17W
-fb
1-10″, 8 Ohm
Oxford 10J4-3
Jensen C10R
CTS AlNiCo
10A100,
Princeton, Silver
’68-’81
2-6V6
Fixed Bias
17W
-fb
1-10″, 8 Ohm
Oxford 10J4-3
10A100,
Pro, Tweed
’47-’53
2-6L6
Cath Bias
15W
No -fb
1-15″, 8 Ohm
Jensen P15R
15A150, 15F150
Pro, Tweed
’53-’55
2-6L6
Cath Bias
15W
-fb
1-15″, 8 Ohm
Jensen P15R
15A150, 15F150
Pro, Tweed
’55-’60
2-6L6
Fixed Bias
30W
-fb
1-15″, 8 Ohm 15A150, 15F150
Pro, Brown
’61-’63
2-6L6
Fixed Bias
30W
-fb
1-15″, 8 Ohm
JBL D-130F
Oxford 15M6-4
15A150, 15F150
Pro, Black
’63-’66
2-6L6
Fixed Bias
40W
-fb
1-15″, 8 Ohm
CTS
Chicago 15
Pro, Black
Reverb
’65-’67
2-6L6
Fixed Bias
40W
-fb
2-12″, 8 Ohm
Jensen C12N
Oxford 12L6
12A125, 12F125
12A150, 12F150
Pro, Silver
Reverb
’68-’81
2-6L6
Fixed Bias
40W
-fb
2-12″, 8 Ohm
Oxford 12L6 or
Utah
12A125, 12F125
12A150, 12F150
Pro, Silver
UltraLinear
Output
Late 70s
2-6L6
Fixed Bias
70W
-fb
2-12″, 8 Ohm
Oxford 12L6,
Utah or Rola
Chicago 12,Texas 12, Cali 12
Showman, Blonde
’61-63
4-6L6
Fixed Bias
80W
1-15″, 8 Ohm
JBL D130F or JBL D140F
Cali 15
Showman, Blk
’63-67
4-6L6
Fixed Bias
80W
1-15″, 8 Ohm
JBL D130F or JBL D140F
Cali 15
Super, Tweed
’47-’53
2-6L6
Cath Bias
15W
No -fb
2-10″, 8 Ohm
Jensen P10R
10A100,
Super, Tweed
’53-’55
2-6L6
Cath Bias
15W
-fb
2-10″, 8 Ohm
Jensen P10R
10A100,
 


Amp Model Amp Config Speaker Configuration Replacement Speakers
Super, Tweed
5E4A
’55
2-6V6
Fixed Bias
15W
-fb
2-10″, 8 Ohm
Jensen P10R
10A100,
Super, Tweed
’55-’60
2-6L6
Fixed Bias
30W
-fb
2-10″, 8 Ohm
Jensen P10Q or
P10R
10A125, 10F125
10A100,
Super, Brown
’61-’63
2-6L6
Fixed Bias
30W
-fb
2-10″, 8 Ohm
Jensen P10Q
10A125, 10F125
Super, Black
Reverb
’63-’67
2-6L6
Fixed Bias
40W
-fb
4-10″, 8 Ohm
CTS AlNiCo
Oxford 10L6
Jensen C10R
10A125, 10F125
10A100,
Super, Silver
Reverb
’68-’82
2-6L6
Fixed Bias
40W
-fb
4-10″, 8 Ohm
CTS AlNiCo, Oxford 10L6
or JBL D110F
10A125, 10F125
Super 60
’88-’93
2-6L6
Fixed Bias
40W
-fb
1-12″, 8 Ohm Chicago 12, Texas 12
Super 112
’90-’93
2-6L6
Fixed Bias
40W
-fb
1-12″, 8 Ohm Chicago 12, Texas
Super, 210
’90-’93
2-6L6
Fixed Bias
40W
-fb
2-10″, 8 Ohm 10A150, 10F150
Super Amp
’93-’96?
2-6L6
Fixed Bias
50W
-fb
4-10″, 8 Ohm 10A125, 10F125
10A150, 10F150
Tremolux, Tweed
’55-60
2-6V6
Cath Bias
15W
1-12″, 8 Ohm
Jensen P12R, P12Q
12A100
Tremolux, Blonde
’61
2-6BQ5
or 2-6L6
Fixed Bias
20W or 35W
1-10″, 8 Ohm
Oxford 10K5 w/tone ring
10A125, 10F125
10A150, 10F150
Tremolux, Blonde
’62-63
2-6L6
Fixed Bias
35W
2-10″, 8 Ohm
Oxford 10K5
10A125, 10F125
10A150, 10F150
Tremolux, Blk
’63-66
2-6L6
Fixed Bias
35W
2-10″, 8 Ohm
Oxford 10K5
CTS AlNiCo
10A125, 10F125
10A150, 10F150
Twin, Tweed
’52-54
2-6L6
Cath Bias
25W
2-12″, 8 Ohm
Jensen P12N
12A150, 12F150
Twin, Tweed
’55-57
2-6L6
Fixed Bias
50W
2-12″, 8 Ohm
Jensen P12N
P12Q
12A150, 12F150
Twin, Tweed
’58-60
4-6L6
Fixed Bias
80W
2-12″, 8 Ohm
Jensen P12N
12A150, 12F150
Twin, Blonde
’60-63
4-6L6
Fixed Bias
80W
2-12″, 8 Ohm
Jensen P12N
12A150, 12F150
Twin Rev, Blk
’63-67
4-6L6
Fixed Bias
80W
2-12″, 8 Ohm
Jensen C12N
Oxford 12T6
JBL D120F
12A150, 12F150
Twin Rev, Sil
’67-81
4-6L6
Fixed Bias
80W
2-12″, 8 Ohm
Jensen C12N
12A150, 12F150
Quad Rev, Sil
’72-79
4-6L6
Fixed Bias
80W
4-12″, 8 Ohm
Oxford 12T6, JBL D120F
CTS, ROLA, Utah
12A150, 12F150
Super Six, Sil
’72-79
4-6L6
Fixed Bias
80W
6-10″, 8 Ohm
Oxford 10L6, JBLD110F, CTS ALNiCo
10A125, 10F125
10A150, 10F150
Vibrolux, Tweed
’56-61
2-6V6
Fixed Bias
10W
1-10″, 8 Ohm
Jensen P10R
10A100,
Vibrolux, Brown
’61-63
2-6L6
Fixed Bias
35W
1-12″, 8 Ohm
Jensen
12A150, 12F150
Vibrolux, Blk
’63-64
2-6L6
Fixed Bias
35W
1-12″, 8 Ohm
Jensen or Oxford 12K5
12A150, 12F150
Vibrolux Rev, Blk
’64-67
2-6L6
Fixed Bias
40W
2-10″, 8 Ohm
Jensen C10Q, CTS AlNiCo, Oxford 10L5, JBL D110F
10A125, 10F125
10A150, 10F150






 


Amp Model Amp Config Speaker Configuration Replacement Speakers
Vibrolux Rev, Sil
’67-82
2-6L6
Fixed Bias
40W
2-10″, 8 Ohm
CTS AlNiCo, Oxford 10L5, Rola
10A125, 10F125
10A150, 10F150
VibrAsonic, Brown
’59-63
2-6L6
Fixed Bias
50W
1-15″, 8 Ohm
JBL D130F
15A150, 15F150
VibrOsonic Rev, Sil
’72-81
4-6L6
Fixed Bias
80W
1-15″, 8 Ohm
JBL D130F, K130F
Gauss, EV
Cali 15
Vibroverb, Brown
’63
2-6L6
Fixed Bias
40W
2-10″, 8 Ohm
Jensen C10Q,Oxford 10K5-3
10A125, 10F125
10A150, 10F150
Gibson GA-20
’52
2-6V6
Cath Bias
12W
1-12″, 8 Ohm
Jensen P12R
12A100
GA-35 RVT Lancer 2-7591
Fixed Bias
12W
1-12″, 8 Ohm
CTS
12A125,12F125, 12F150T
Marshall Lead Model
’58
2-EL84
Cath Bias
18W
2-10″
Celestion
AlNiCo Blue Pup, ceramic Blue Pup
AlNiCo Silver Ten, ceramic Silver Ten
Marshall Lead Model
’61
2-6L6
Fixed Bias
50W
4-10″
Celestion
AlNiCo Blue Pup, ceramic Blue Pup
AlNiCo Silver Ten, ceramic Silver Ten
Marshall Bass/Lead Model
’62
2-6L6
Fixed Bias
50W
2-12″
Celestion
AlNiCo Blue Dog, ceramic Blue Dog
AlNiCo Silver Bell, Ceramic Silver Bell
Marshall JTM45 2-6L6
Fixed Bias
50W
2-12″
Celestion
G12 Bulldog
AlNiCo Blue Dog, ceramic Blue Dog
Vox AC15 2-EL84
Cath Bias
15W
2-12″
Celestion G12
AlNiCo Blue Dog, ceramic Blue Dog
AlNiCo Silver Bell, ceramic Silver Bell
Vox AC30 4-EL84
Cath Bias
30W
2-12″
Celestion G12
Bulldogs
AlNiCo Blue Dog, ceramic Blue Dog

 

Weber Speakers gratefully acknowledges the following individuals for their contribution to these pages:

Joe Pampel, Steve Vickery, Greg Gagliano, Dale VanZile, Akbar Anwari, John Templeton, Andy Ruhl, Michael Murphy, Chris Russo, Frank Roberts, Mike Bacino, Chris Taylor, Dave Currie