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Front Panel

1

2

3 4

5

6

7

8

9

10

11

13

14

15

Lo/Hi

Bass

Middle

Treble

Bright

Input

Depth

Stand By

Hi Gain 2

Lo Gain 1

Reverb 1

Reverb 2

Master 1

Master 2

Classic Tube 50

12

1 Input:

 

Input¼" unbalanced input. Plug your guitar cord in here.

2 Lo Gain 1:

 

Input sensitivity control during Lo Gain mode.

    Lo Gain: set the Gain-button 11 to the Off position, 
    Hi Gain: set the Gain-button 11 to the On position, LED illuminates.
    A Tip from the Designer: Gain settings depend on what type of pickups are installed in your guitar. 
    The recommended setting for humbuckers or active pickups lies between the 8 and 11 o’clock 
    positions and 9 to 12 o’clock for single coils for a pure clean response; the Gain button must be in 
    the OFF-position.

3 Bright:

 Alters the EQ by boosting the upper treble range; effectiveness decreases at higher 

    Gain (2 & 5) settings; the Bright feature affects both Gain sections.
    A TIP from the Designer: For a crisp glassy tone, set the Bright switch to the On position. This setting 
    boosts the treble response of muddy pickups.

4 Depht:

 Alters the EQ by boosting the low end range; the Depth feature affects both Gain modes.  

    A TIP from the Designer: The Depth feature enable precision shaping of basic sounds, and allows you   
    to tune sounds to best match your guitar's pickups. In combination with higher Gain settings this   
    button should be set to the Off position to avoid undifferentiated bass response.

5 Hi Gain 2:

 

Input sensitivity control during Hi Gain mode. It controls the amount of preamp     

    overdrive.
    

CAUTION:

 Extremely high gain and volume levels in the Hi Gain mode can produce  

    strong feedback. Avoid feedback squeals, they lead to hearing loss and damaged speakers!

    

A TIP from the Designer: For Crunch- and melodic Rock-Rhythm-Sounds set the Hi Gain pot between 

    9 and 11 o´clock positions depending on the type of pickup; Gain button 11 in On position. For solo 
    parts try settings between 11 and 4 o´clock positions.

Amp

Tube

Some of the more rabid vintage gear and blues aficionados might argue that an amp with 
more than three or four controls could never be a "classic.”
For my money, controls are just means to an end, their numbers don't mean much when 
you're trying to categorize an amp. The decisive factors are sound quality, the overall concept 
and, let us not discount the pleasures of gazing at a great-looking amp, appearance. This is 
what any meaningful verdict on what's "classic” must take into account.
I've been designing tube amps exclusively for the past 16 years and, in this time, I've developed 
a philosophy—take the best of the old and marry it to the best of the new. Yes, I want to offer 
you folks top-notch tone, but I also want you to enjoy the benefits of innovative concepts.
Enter the Classic tube Line, which incorporates my ideas while satisfying the demands of the 
working guitar player. These amps are chock full of practical features, yet, when it comes to 
handling ease, these babies, like many of my other "kids”, are a piece of cake. Perhaps I didn't 
coin it, but I'm a firm believer in my adopted slogan: "Plug in and play!”
Horst Langer, Designer

Quality components, excellent workmanship and strict quality control ensure this amp retains 
its value.
You'll find guidelines on care and maintenance of tube amps in the operator´s manual.
Please read and heed these before operating your amp. You'll also come across boxes shaded 
grey throughout this manual. These are located between the descriptions of the amp's 
functions and contain handy tips on the preceding function. All critical information pertaining 
to the operation of this amp is preceded by "NOTE" or "CAUTION." Please pay particular 
attention to these safety tips and to the "Instruction for the prevention of fire, electric shock or 
injury of persons" printed in the separate manual.
The ENGL team wishes you all the best—may you and your amp enjoy a "harmonically rich" 
future together!

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