Service and Player Manuals; Circuit; Contemporary and Earlier Circuits:
Fender “Red Knob” The Twin; “Black Knob” The Twin; 1994 The Twin and the ‘Evil Twin’
I’m including references here to Fender ‘The Twin‘ amps produced from 1987-1994 and 1994-2000 because of the shared technology developments with the 93 Super and Concert.
There seems to be some mis-conception about which ‘The Twin‘ amp series should also be referred to as ‘The Evil Twin‘. I will try to avoid that reference here; but, I have included references to Fender’s approach to naming a particular series ‘The Evil Twin‘ in its promotional literature.
Also, should ‘The Twin‘ PR-266 be referred to as ‘The ’94 Twin‘ or ‘The ’95 Twin‘: as it appears from the literature to have only been available from 1995 onward? I will refer back to Fender’s internal documents on the matter – The Service Manual and the Owner’s Manual – where the Product Release 266 (PR-266) model is referred to as ‘The 94 Twin‘.
Finally, on the matter of ‘The Twin‘ it is useful to have a look at how the earlier model (1987-1994) used LED/LDR combinations for switching (first used in the 1980s designed amps); the later model (1994-2000) used FET switching (not without its problems); wheras the Super Amp and Concert (1993-1995) used relay switching. See the linked schematic attachments for more details.
The Red-Knob series amps (Super 112, Super 210, Super 60) preceded the Pro-Tube series and followed the Jahns and Rivera eras of amp design at Fender. (Note the use of ICs for driving the reverb and effects loop in the Red-Knob series Super amps; and what ended up being used in the Blues Deluxe and Blues DeVille, and Hot Rod series amps).
Fender Frontline and some notes on the contemporary Fender Twin amps
Fender Frontline began as a magazine-style catalog and information source published at least twice a year, and available from trade shows and dealers. The first copies I got were around the time I was scoping out buying the Fender Super Amp and it is 1994 Vol 12. I have included some scans from that copy and later copies that may be of interest to the reader. One theme that is addressed is the use of the label “Evil Twin” as to which series of amps the term applies to. Whenever and however it began to be used in the music community, Fender did not apply the term until the release of the Fender Twin PR266 around 1994/1995.
Fender Frontline Magazine clippings
Fender Frontline Magazine Cover 1994 Vol 12
Frontline 1994 Vol 12 p24
“Pro Tube Series” Catalog Entry
Only one version of the Concert model offered: with Fender “Vintage Gold” Speaker
(The Twin: Red Knob/Black Knob version P/N 21-6200 – see also 1993 Catalog p6 of 12pages)
Frontline 1994 Vol 12 p33
Super and Concert “Sound Setups”
Fender Frontline Magazine Cover 1994 Vol 13
Frontline 1994 Vol 13 p24
Two versions of the Concert either with Fender Gold or Celestion 12-80 “Classic Lead 80” Speaker
(The Twin: Red Knob/Black Knob P/N 21-6200)
Frontline 1994 Vol 13 p33
Blues Deluxe and Blues DeVille “Sound Setups”
Fender Frontline Magazine Cover 1995 Vol 16
No catalog section.
Frontline 1995 Vol 16 p10
The Twin (94 Twin-PR266) introduced with an ad showing its line of predecessors
Frontline 1995 Vol 16 p27
The Twin “Sound Setups”
Fender Frontline Magazine Cover 1995 Vol 17
No catalog section.
Frontline 1995 Vol 17 p44
Frontline Magazine Ad for the “Evil Twin” (PR-266)
Fender Frontline Magazine Cover 1996 Vol 18
Fender 1996 Vol 18 p24
“Evil Twin” mentioned in Pro Tube section of catalog (PR-266)
New P/N 021-4809 confirms previous Red-Knob/Black-Knob Twin (c1987-1994, P/N 21-6200) has been superseded.
Super Amp and Concert do not appear in this catalog or later catalogs indicating the line has been dropped.
Fender Frontline Magazine Cover 1998 Vol 24
Frontline 1998 Vol 24 p64
Significantly increased catalog entry describes P/N 021-4809 (PR-266) as “Evil Twin” with accompanying colour photo.
Fender Frontline Magazine Cover 1999 Vol 25
Frontline 1999 Vol 25 p70
Catalog describes P/N 021-4809 (PR-266) as “A Jack of All Trades…A.K.A “The Evil Twin”.”
The Catalog: Fender Guitar Amplifiers (c1993)
I have scanned a copy of the 12-page 1993 Fender Guitar Amplifiers catalog that contained photos and details of the 93 Super Amp and 93 Concert Amp. The scans were made on a domestic Samsung Scanner/Printer with a resolution of about 600dpi x 600dpi but have not been colour corrected or altered in any way. The resulting JPG photo files were then converted on a Macbook using the Preview function with Export to PDF. This results in a large file but other methods lose quality. The JPG photos are in Landscape format but the PDF files are converted to Portrait format; however, this should print straight to paper (A4) with minimal edging if required. The purpose of saving this catalog is to compare and contrast the 93 Super Amp with other amps available at the time, and to show the footswitch that came with the Performer 1000 appears to be identical to the one that came with the Super Amp.
Order of pages from this catalog:
– (Page) Description:
– (01) Front cover of Fender Guitar Amplifiers (c1993)
– (02) Photos of Historic Tweed Amps
– (03) The Other Half Of Your Electric Guitar
– (04) Custom Amp Shop and Vintage
– (05) Photos of four Vintage Reissue Amps
– (06) Pro Tube including Super Amp and Concert Amp
– (07) Tweed – a series of vintage-styled new amp designs
– (08) Performer and Standard solid-state and hybrid-tube-ss amps
– (09) Photos of solid-state Standard line of amps
– (10) Photos of solid-state amps including RAD, HOT, JAM and M-80 series
– (11) M-80 and Champ
– (12) Rear cover with amplifier specifications
Click on the photo for a larger image, or the link below the photo for a downloadable PDF.
PDF: (01) Front cover of Fender Guitar Amplifiers (c1993)
Sources: these manuals and circuits were either scanned by me or downloaded prior to 2007. At the time of publishing this blog I have lost or I do not currently have their sources, but I will do my best to find them. If you know where they were originally posted please contact me via email.
The Player’s Manual came with the amp. I needed the Service Manual to attend to the one problem I’ve had with the amplifier: a loose LED in the footswitch would not allow me to switch between channels.