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Author Topic:  1972 Fender Vibrosonic Reverb w/split cab, fx both channels
Michael Brebes


From:
Northridge CA
Post  Posted 13 Nov 2018 11:15 am    
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This is a 1972 Vibrosonic Reverb chassis that was gutted. Asking $1200. Per request, will sell the head for $1000, $950 without piggyback hardware. Cost quite a bit more in parts than I initially thought. New ClassicTone transformers with a multi-tap output transformer and selector switch installed. All new electrolytic capacitors and most of the poly caps with orange drop Sprague. New ceramic tube sockets. All pots were bad so replaced them all with CTS pots. New knobs. Modified bias circuit to Blackface specs. Modified so FX are available on both channels for those who play multiple instruments through one amp. Included before and after pictures of the chassis. The speaker cabinet was previously made for a client that wanted the cabinet for a Silverface Dual Showman Reverb. Said he wanted it as light as possible but when he saw the thin boards on the back he said he didn't want it. The speaker is a JBL M151-8, which was designed to be like the original D-130s, is the last instrument speaker JBL made. The grill cloth doesn't match perfectly but on request I will change to match the head. Also upon request I will change the back of speaker cabinet to open/closed or whatever.










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Michael Brebes
Instrument/amp/ pickup repair
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Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

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Last edited by Michael Brebes on 12 Dec 2018 7:54 am; edited 2 times in total
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Erv Niehaus


From:
Litchfield, MN, USA
Post  Posted 13 Nov 2018 12:07 pm    
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Beautiful job!! Very Happy
Erv
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Michael Butler


From:
California, USA
Post  Posted 13 Nov 2018 2:35 pm    
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amazing reconstruction!

play music!
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Michael Brebes


From:
Northridge CA
Post  Posted 23 Nov 2018 7:51 am    
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ttt
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Wayne Ledbetter


From:
Arkansas, USA
Post  Posted 23 Nov 2018 9:21 am     Vibrosonic
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What is a Vibrosonic? Output wise? You say gentleman didn't want cabinet because wood too light? What does that mean besides you building the cabinet with some light type wood, I guess?
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Sho Bud Super Pro, Fender Twin Reissue, Martin HD-28, Gibson J-45, Gibson RB-250,Stelling Bellflower,Regal Dobro, Takamine and Alvarez Classical, Fender Telecaster, Peavey Studio Pro 112. Mainly played Gospel and some bluegrass.
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Erv Niehaus


From:
Litchfield, MN, USA
Post  Posted 23 Nov 2018 9:27 am    
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I think it's basically a twin reverb with a 15" speaker.
Erv
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Michael Brebes


From:
Northridge CA
Post  Posted 24 Nov 2018 8:29 am    
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A Vibrosonic was a Twin Reverb with an 8 ohm output and a 15" speaker.
The back boards on the speaker cabinet are thin/light, like those on a Twin Reverb, to minimize weight. Cutting weight from any other part of the cabinet would weaken it structurally.
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Wayne Ledbetter


From:
Arkansas, USA
Post  Posted 24 Nov 2018 8:52 am     Amp
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If I understand everything, it appears this amp was reconditioned with several new parts and mated with a JBL 15" speaker. If it's similar to a Twin it will output about 85 watts. With separate cabinets, weight is reduced in moving the amp parts. Why wouldn't this be a good steel amp? Is age a factor? The guy wanted a light cabinet but not light wood. Not sure how you can do that. Is the light wood some kind of issue? Can't that be changed pretty easy if some one wants something else. Unless there's something I'm not seeing, this should be all a guy needs, huh? Also, was there anything of the old amp used but chassis?
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Sho Bud Super Pro, Fender Twin Reissue, Martin HD-28, Gibson J-45, Gibson RB-250,Stelling Bellflower,Regal Dobro, Takamine and Alvarez Classical, Fender Telecaster, Peavey Studio Pro 112. Mainly played Gospel and some bluegrass.


Last edited by Wayne Ledbetter on 24 Nov 2018 6:12 pm; edited 1 time in total
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Bill Moran


From:
Virginia, USA
Post  Posted 24 Nov 2018 5:34 pm    
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The 72 Twin Reverb's were 100 watt. With the Black Face mod on this my guess would be 85 watt.
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Michael Brebes


From:
Northridge CA
Post  Posted 24 Nov 2018 9:10 pm    
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To put all questions about the cabinet to rest:
The cabinet was built with standard thickness birch plywood for the four sides and the baffle board. If I remember, 1/4" plywood was used for the back panels in an attempt to drop cabinet weight, instead 3/8, 1/2, or 5/8. He griped about how it flexed when it was pushed.
As mentioned in the initial post, UPON REQUEST I can change the back panels to either thicker separate back panels or a full thicker back panel.
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 24 Nov 2018 9:11 pm    
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Yes, the 1972 Vibrosonic is probably around 85 watts.
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 30 Nov 2018 7:45 am    
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ttt
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 5 Dec 2018 6:29 am    
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ttt
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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John Goux


From:
California, USA
Post  Posted 5 Dec 2018 9:50 pm    
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Great sounding amp. I played it a week ago with 4 different pickups. Classic steel amp tone.
John
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Roger Rettig


From:
Naples, FL
Post  Posted 6 Dec 2018 5:27 am    
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The Vibrasonic was the best steel guitar amp I ever had - by a mile!

I could lift one in the 1970s, though.
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Michael Brebes


From:
Northridge CA
Post  Posted 6 Dec 2018 4:21 pm    
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That's why it's in a split cabinet, to help those ailing backs.
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 10 Dec 2018 11:25 am    
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ttt
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 17 Dec 2018 7:35 am    
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ttt
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Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 6 Jan 2019 5:46 am    
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ttt
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Michael Brebes


From:
Northridge CA
Post  Posted 13 Jan 2019 6:37 am    
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ttt
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso

Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100
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Bobby Nelson


From:
North Carolina, USA
Post  Posted 14 Jan 2019 2:25 am    
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85 or 100 watts would depend on the output transformer I believe. 72s were 100 watts. Do you know what the trans is rated at?
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J R Rose


From:
Keota, Oklahoma, USA
Post  Posted 14 Jan 2019 11:31 am    
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Does anyone know when Fender started making the Vibrosonic Reverb Amp? I think they came after CBS Musical brought Fender? Was always told that they were the same as a Twin but with a 15" speaker and rated 100 watts. I know they were/are a great sounding amp. J.R.
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Erv Niehaus


From:
Litchfield, MN, USA
Post  Posted 14 Jan 2019 11:50 am    
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I have one from 1972.
Erv
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Bobby Nelson


From:
North Carolina, USA
Post  Posted 14 Jan 2019 11:54 am    
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I think '72 is about right. Yes, they are Twin Reverbs with a 15" spkr and an 8 ohm transformer. The perfect mate to my 73 Twin reverb.
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J R Rose


From:
Keota, Oklahoma, USA
Post  Posted 14 Jan 2019 6:53 pm    
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Thanks Erv and Bobby, that's what I was thinking. I wish I could run across one somewhere in my area. I do not play out anymore so it could just set in my music room. J.R.
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Black Rains SD-10, Peavey LTD 400 with 15" Telonics, Sho-Bud Seat, Goodrich Pedal, Sho-Bud Bar, Picks, Cords.
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