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Copyright 2014. All Rights Reserved.

     

    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, C15N
    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, 12F100
    Ampeg Jet
    '63-69
    2-7591
    Cath Bias
    15W
    1-12", 8 Ohm
    Jensen C12R, CTS AlNiCo, Quam
    12A100, 12F100
    Ampeg
    Reverberocket
    '61-63
    2-6V6
    Cath Bias
    15W
    1-12", 8 Ohm
    Jensen P12S, P12R, C12R
    12A100, 12F100
    Ampeg
    Reverberocket
    '63-68
    2-7591
    Cath Bias
    15W
    1-12", 8 Ohm
    Jensen C12R
    or CTS
    12A100, 12F100
    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, 10F100
    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, 10F100
    Bassman, Tweed
    '58-'60
    2-6L6
    Fixed Bias
    40W
    -fb
    4-10", 8 Ohm
    all in parallel
    Jensen P10R or P10Q
    10A100, 10F100
    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, 12F100
    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, 10F100
    Princeton, Black
    '64-'67
    2-6V6
    Fixed Bias
    17W
    -fb
    1-10", 8 Ohm
    Oxford 10J4-3
    Jensen C10R
    CTS AlNiCo
    10A100, 10F100
    Princeton, Silver
    '68-'81
    2-6V6
    Fixed Bias
    17W
    -fb
    1-10", 8 Ohm
    Oxford 10J4-3
    10A100, 10F100
    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, 10F100
    Super, Tweed
    '53-'55
    2-6L6
    Cath Bias
    15W
    -fb
    2-10", 8 Ohm
    Jensen P10R
    10A100, 10F100
     


    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, 10F100
    Super, Tweed
    '55-'60
    2-6L6
    Fixed Bias
    30W
    -fb
    2-10", 8 Ohm
    Jensen P10Q or
    P10R
    10A125, 10F125
    10A100, 10F100
    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, 10F100
    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 P10A125, 10F125
    10A150, 10F150
    Tremolux, Tweed
    '55-60
    2-6V6
    Cath Bias
    15W
    1-12", 8 Ohm
    Jensen P12R, P12Q
    12A100, 12F100
    P12Q, C12Q
    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, 10F100
    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, 12F100
    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