Scumback Speakers
Well-Known Member
I've had a lot of questions asked by Marshall Forum members recently. I started this thread on other online forums, and figured it would be faster & easier for members to access it here for reference.
Scumback Speaker Tone Defined, March 2017.
(Almost done with this, I'm fighting a head cold with antibiotics for the last several days, so bear with me while I finish it and polish up the edges, ok?)
There seems to be a lot of confusion on the net and other places on Scumback Speaker models and the tones they produce. The descriptions below apply to the current black frame California built speakers. This should clear all that up, I hope!
The tone difference between the low power PVC model 20/25w Kraft and 65w nomex coil is pretty small, although some of my clients feel they have a touch more low end than the nomex versions. With clients in my demo room comparing the 20/25w cab to the 65w PVC cab, they told me it was like splitting hairs over the tones between the two speakers, which is pretty accurate, IMO. To handle a cranked 100w Marshall safely, you’ll need eight of the 20/25w Kraft models, or four of the 65w nomex versions.
M Series Speakers (M55/M75/M75-PVC/M55-PVC/BM75/BM55) 35 oz ceramic magnet, 97db
M55-PVC is the tone of the pre 1971 G12M “Greenback T1511” 014 Pulsonic 55hz bass cone, with the same cone stamp as the original. 55hz bass response speaker, with a little more upper mids and treble as the original did. Frequently this speaker was in Marshall “Bass” logo 4x12 cabs. This uses a different 55hz cone than the M55. The 20w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 20w & 65w versions, 35 oz ceramic magnet in 8 & 16 ohms. The 20w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone of the M55-PVC would be very close to what Paul Kossoff of Free used with his Les Paul & Marshall stacks.
M55 model is my take on the old pre 1971 G12M bass cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for the Paul Kossoff/Free tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of this speaker is a little darker than the M55-PVC, and is great for Strat players, and for mixing with the M75 in a cab to give it a little more bottom end which would be a little punchier. Open back cabs sound bigger with this speaker than the PVC version.
M75-PVC is the 1966-1971 G12M 003 Pulsonic 75hz lead cone, with the same cone build as the original. Going to have a little more upper mids and treble as the original did. This uses a different 75hz cone than the M75. The 20w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 20w & 65w versions, 35 oz ceramic magnet in 8 & 16 ohms. The 20w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone of this speaker is like the original 1966-1971 G12M’s, so think early Cream, Hendrix.
M75 is my take on the old pre 1971 G12M lead cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of the M75 is a little bigger on the low end, creamier high end than the M75-PVC. Great with overdriven tones, Strats/Les Pauls, brighter amps, and those who want more grunt than the M75-PVC or Cele G12M Reissue.
BM75 is the 1974-1980 75hz G12M 75hz lead cone, with the same cone build as the original. Going to have a little more upper mids and treble as the original did. This uses a different 75hz cone than the M75, with a heat treated nomex voice coil. 25, 65 & 100w versions, 35 oz ceramic magnet in 8 & 16 ohms.
The tone of this speaker is like the 1974-1980 BlackBack G12M’s, so think EVH & mid 70/80’s rock tones.
BM55 is my take on the 1974-1980 75hz G12M 55hz bass cone, with the same cone build as the original which will fatten up your Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of this speaker will add more low end grunt to your BM75, but with a little less high end. Great in open back cabs
H Series Speakers (H55/H75/H55-PVC/H75-PVC/BH75/BH55) 50 oz ceramic magnet, 99db
H55-PVC is the pre 1971 G12H30 “Greenback T1281” 014 Pulsonic 55hz bass cone, with the same cone stamp as the original. 55hz bass response speaker, with a little more upper mids and treble as the original did. This uses a different 55hz cone than the M55. The 25w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 25w & 65w versions, 35 oz ceramic magnet in 8 & 16 ohms. The 20w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone difference between the 25w Kraft and 65w nomex coil is pretty small, although some of my clients feel the 20w has a touch more low end. When clients were in my demo room comparing the 25w cab to the 65w PVC cab, they told me it was like splitting hairs over the tones between the two speakers, which is pretty accurate, IMO. To handle a cranked 100w Marshall safely, you’ll need eight of the 25w Kraft models, or four of the 65w nomex versions.
The tone of this speaker is the later Jimi Hendrix (post 1968) including Woodstock, Band Of Gypsies, and Ritchie Blackmore Deep Purple tones.
H55 model is my take on the old pre 1971 G12M bass cone type speaker but with a touch more lows, and creamier high end than the original. These are incredible with those looking for the later Jimi Hendrix / Strat tones, but also sound great with humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of the H55 is a little darker, creamier high end than the H55-PVC. It will fatten up the low end a little and smooth out the top end, too.
H75-PVC is the pre 1971 G12H30 “Greenback T1217” 003 Pulsonic lead cone tone, with the same cone build as the original. Going to have a little more upper mids and treble as the original did. This uses a different 75hz cone than the H75. The 25w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 25w & 65w versions, 50 oz ceramic magnet in 8 & 16 ohms. The 25w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone of the H75-PVC is the old G12H30 pre-rola tone in the Marshall “100” labeled cabs. It has a good low end, not as much mid hump as the M75 or M75-PVC, and a little more upper mids.
H75 is my take on the old pre 1971 G12H30 lead cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 50 oz ceramic magnet and heat treated nomex voice coils.
The H75 is a little darker than the H75-PVC, more low end, less high end. Good for straight up rock paired with the M75 speakers, or alone if you dial in the EQ knobs.
BH75 is my take on 70’s BlackBack era G12H30 lead cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 50 oz ceramic magnet and heat treated nomex voice coils.
BH55 is the 70’s version of the BlackBack T1281 55hz bass cone. Big low end, punchy mids and upper mids.
(continued on next post below)
Scumback Speaker Tone Defined, March 2017.
(Almost done with this, I'm fighting a head cold with antibiotics for the last several days, so bear with me while I finish it and polish up the edges, ok?)
There seems to be a lot of confusion on the net and other places on Scumback Speaker models and the tones they produce. The descriptions below apply to the current black frame California built speakers. This should clear all that up, I hope!
The tone difference between the low power PVC model 20/25w Kraft and 65w nomex coil is pretty small, although some of my clients feel they have a touch more low end than the nomex versions. With clients in my demo room comparing the 20/25w cab to the 65w PVC cab, they told me it was like splitting hairs over the tones between the two speakers, which is pretty accurate, IMO. To handle a cranked 100w Marshall safely, you’ll need eight of the 20/25w Kraft models, or four of the 65w nomex versions.
M Series Speakers (M55/M75/M75-PVC/M55-PVC/BM75/BM55) 35 oz ceramic magnet, 97db
M55-PVC is the tone of the pre 1971 G12M “Greenback T1511” 014 Pulsonic 55hz bass cone, with the same cone stamp as the original. 55hz bass response speaker, with a little more upper mids and treble as the original did. Frequently this speaker was in Marshall “Bass” logo 4x12 cabs. This uses a different 55hz cone than the M55. The 20w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 20w & 65w versions, 35 oz ceramic magnet in 8 & 16 ohms. The 20w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone of the M55-PVC would be very close to what Paul Kossoff of Free used with his Les Paul & Marshall stacks.
M55 model is my take on the old pre 1971 G12M bass cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for the Paul Kossoff/Free tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of this speaker is a little darker than the M55-PVC, and is great for Strat players, and for mixing with the M75 in a cab to give it a little more bottom end which would be a little punchier. Open back cabs sound bigger with this speaker than the PVC version.
M75-PVC is the 1966-1971 G12M 003 Pulsonic 75hz lead cone, with the same cone build as the original. Going to have a little more upper mids and treble as the original did. This uses a different 75hz cone than the M75. The 20w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 20w & 65w versions, 35 oz ceramic magnet in 8 & 16 ohms. The 20w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone of this speaker is like the original 1966-1971 G12M’s, so think early Cream, Hendrix.
M75 is my take on the old pre 1971 G12M lead cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of the M75 is a little bigger on the low end, creamier high end than the M75-PVC. Great with overdriven tones, Strats/Les Pauls, brighter amps, and those who want more grunt than the M75-PVC or Cele G12M Reissue.
BM75 is the 1974-1980 75hz G12M 75hz lead cone, with the same cone build as the original. Going to have a little more upper mids and treble as the original did. This uses a different 75hz cone than the M75, with a heat treated nomex voice coil. 25, 65 & 100w versions, 35 oz ceramic magnet in 8 & 16 ohms.
The tone of this speaker is like the 1974-1980 BlackBack G12M’s, so think EVH & mid 70/80’s rock tones.
BM55 is my take on the 1974-1980 75hz G12M 55hz bass cone, with the same cone build as the original which will fatten up your Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of this speaker will add more low end grunt to your BM75, but with a little less high end. Great in open back cabs
H Series Speakers (H55/H75/H55-PVC/H75-PVC/BH75/BH55) 50 oz ceramic magnet, 99db
H55-PVC is the pre 1971 G12H30 “Greenback T1281” 014 Pulsonic 55hz bass cone, with the same cone stamp as the original. 55hz bass response speaker, with a little more upper mids and treble as the original did. This uses a different 55hz cone than the M55. The 25w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 25w & 65w versions, 35 oz ceramic magnet in 8 & 16 ohms. The 20w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone difference between the 25w Kraft and 65w nomex coil is pretty small, although some of my clients feel the 20w has a touch more low end. When clients were in my demo room comparing the 25w cab to the 65w PVC cab, they told me it was like splitting hairs over the tones between the two speakers, which is pretty accurate, IMO. To handle a cranked 100w Marshall safely, you’ll need eight of the 25w Kraft models, or four of the 65w nomex versions.
The tone of this speaker is the later Jimi Hendrix (post 1968) including Woodstock, Band Of Gypsies, and Ritchie Blackmore Deep Purple tones.
H55 model is my take on the old pre 1971 G12M bass cone type speaker but with a touch more lows, and creamier high end than the original. These are incredible with those looking for the later Jimi Hendrix / Strat tones, but also sound great with humbucker guitars. 25/65/100w models with 8 & 16 ohms, 35 oz ceramic magnet and heat treated nomex voice coils.
The tone of the H55 is a little darker, creamier high end than the H55-PVC. It will fatten up the low end a little and smooth out the top end, too.
H75-PVC is the pre 1971 G12H30 “Greenback T1217” 003 Pulsonic lead cone tone, with the same cone build as the original. Going to have a little more upper mids and treble as the original did. This uses a different 75hz cone than the H75. The 25w PVC coil model uses a regular non heat treated Kraft paper voice coil. The 65w version uses a heat treated nomex voice coil. 25w & 65w versions, 50 oz ceramic magnet in 8 & 16 ohms. The 25w Kraft version is sold without warranty, while the 65w has a 1 year warranty.
The tone of the H75-PVC is the old G12H30 pre-rola tone in the Marshall “100” labeled cabs. It has a good low end, not as much mid hump as the M75 or M75-PVC, and a little more upper mids.
H75 is my take on the old pre 1971 G12H30 lead cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 50 oz ceramic magnet and heat treated nomex voice coils.
The H75 is a little darker than the H75-PVC, more low end, less high end. Good for straight up rock paired with the M75 speakers, or alone if you dial in the EQ knobs.
BH75 is my take on 70’s BlackBack era G12H30 lead cone type speaker but with a touch more lows, and creamier high end than the original. Good for those looking to fatten up their Strat/Tele, and for rock tones with their humbucker guitars. 25/65/100w models with 8 & 16 ohms, 50 oz ceramic magnet and heat treated nomex voice coils.
BH55 is the 70’s version of the BlackBack T1281 55hz bass cone. Big low end, punchy mids and upper mids.
(continued on next post below)