This will ensure that not only is the amp biased correctly but that you are kept safe at the same time. This illustrated user guide will take you step-by-step through every stage of the process on how to perfectly bias your ENGL tube amplifier. The important thing is that it is written by a senior electronics engineer with over 40 years of experience in the amplifier industry. He has repaired and modified thousands of amplifiers over his long career. So this is the ultimate guide written exactly for your amp.
He also debunks a lot of myths surrounding the biasing of valves once and for all along the way. Run them too hot and you may actually like the sound better than the suggested factory setting. But run them really hot and there is a danger of red-plating which is a real threat. Any amp that red-plates the valves must be switched off immediately.
Back then, when two channels and a master volume on an amp already counted as comfort features, ENGL's futuristic concept was equivalent to a landslide. Edmund Engl had the brilliant idea in the early s. He wasn't an electronics freak, but a musician. He saw things with the pragmatic necessity of musical practice and thought that such a programmable amplifier would be ideal to have a wide variety of sounds available via footswitch. From this moment on, Horst Langer comes into play, the technically savvy friend and ENGL's technical mastermind from then until today.
With his know-how, he was able to realize every idea, any ENGL amp is a child of his mind. The Straight model in was also a great success. Technically speaking it was a step back to a conventional two-channel amp — again, however with non common features at that time, such as Lead Boost, Mid Shift and Bright switching.
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Learn more. A couple of models of our NanoSeconD Spinners are equipped with a truly unique wind-up mechanism. Very easy to use, in particular if you are not looking forward to mess around with startingcords, or if you're afraid to lose them easily. This explanation tells you how to proceed to get your Autostarting Spinner up and running in no time. Continue reading This can occur when the amp is operated incorrectly for example, if the impedance is wrong due to an incorrect speaker load , at extreme power spikes, or when a tube is defective.
Reset this electronic monitoring system by switching the standby switch off and on again. When you press the standby switch to turn the amp on again, the system again measures the current sent to the tube. If it is still too high, the power amp must be checked by a service technician, and the tube may have to be replaced if it is defective.
Depth Punch This control shapes the lo frequency response in the power amp stage and affects all channels. A tip from the designer: If you really want to beef up the low end of your lead tone to dial in the type of sound often employed in contemporary styles, press the Bottom button.
Note that you can activate this feature separately for each of the two Lead channels. Page 4. This control determines the response of a specific mid frequency range when sound style "open" is selected.
This control determines the response of a specific mid frequency range when sound style "focused" is selected. TIP from the Designer: Try the open and focused voicings out for different applications. As the names suggest, open gives you a more expansive sound that is excellent for grinding out heavy-duty riffs, while focused brings up the low mids, making it a great choice for leads. TIP from the Designer: To help you get acquainted with the amp's fundamental sounds, I recommend that you set all tone controls to the center or 12 o'clock position.
For high Gain Lead sounds, your best bet is to turn the Treble and the Presence knobs well down to prevent the pickups and speakers from interacting at hi levels and generating feedback the recommended setting is somewhere in the 9 to 2 o'clock range. Since the two knobs sweep through different frequency ranges and influence the signal at different places in the amp's internal signal chain, you can dial in different combinations of treble and presence settings to come up with many interesting sonic variations.
Choose open for a looser, focused for a tighter mid-range voicing. Twist the appropriate knob open knob 21, focused knob 22 of Ch II to tweak the selected mids voicing to taste. You can also activate this function via a respective footswitch connected to jack 35 or When a footswitch is plugged in, the front panel sound style button is disabled.
This feature can also be switched via the Custom Footswitch Port 37 or the footswitch jack the channel selector pushbutton is deactivated once a footswitch is connected. The red LED next to the knob lights up when this knob determines the master volume level. The green LED next to the knob lights up when this knob determines the master volume level.
TIP from the Designer: This option of using a footswitch to select the two master A and B knobs gives you another interesting switching alternative: You can dial in two different volume levels and activate them in combination with the amp's different operating modes i. That gives you many basic sonic variations, each of which supports different playing techniques: In effect, you get footswitchable clean or slightly dirty rhythm or chrunch and Lead tones in Main Channel I, and overdriven preamp tones in Lead mode for power chords or distorted lead guitar in Main Channel II.
And by working your guitar's volume knob, you can expand this palette of tones accordingly. The amp's tubes stay warm, which means that it is ready to roll immediately when you switch it back to full power. To reset the power tube monitoring circuitry, press the standby switch briefly see Power Tube Monitor.
Page 5: Rear Panel. Before you power the amp up, ensure the voltage value printed beside the AC socket corresponds to the available current. NOTE: E nsure replacement fuses bear identical ratings refer to the table!
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