User manual HUGHES & KETTNER TRIAMP ML II

[. . . ] Slots and openings in the cabinet and the back or bottom are provided for ventilation; to ensure reliable operation of the product and to protect it from overheating, these openings must not be blocked or covered. This product should not be placed in a built-in installation unless proper ventilation is provided. This product should be operated from the type of power source indicated on the marking label. If you are not sure of the type of power available, consult your dealer or local power company. [. . . ] - As a rule, the amp will not absolutely need to be re-biased with each new set of tubes, assuming you use a matched set. Biasing is complex procedure requiring special tools and should only be done by a qualified amp specialist. How can you extend the life of your tubes? - Use the STANDBY SWITCH!The more often the tubes are heated up, the shorter their life span will be. The standby feature switches the anode voltage off and reduces actual operating time. Avoid mechanical shocks, especially when the amp is on. Switch the amp off and let the tubes cool down before transport. A quality flight case is a good investment and is only slightly more expensive than a complete set of tubes. - Proper bias and trim extend the life of your tubes. If you find the tubes need to replaced too often, consult a qualified technician. All other TRIAMP ML II ML II components do not require maintenance. Use a soft slightly damp cloth for all exterior parts. If any of these three switches is on, the circuit is active. The sound is thin and muddy when the effects processor is active. - The signal processor is causing phase cancellations that are being added to the original signal in the parallel loop. To avoid phase cancellations, turn the FX-MIX control all the way to the right (WET), and adjust the mix at the processor itself. When in use with a loud PA, the RED BOX DI OUT circuit is causing feedback even though the amp is set to a low MASTER volume. - Speakers connected to a tube amp may have microphonic properties. Turn TriAmp's MASTER volume up and the circuit will stop feeding back. In extreme cases of microphonic speakers, you would either turn the PA down or mic the cabinet. Your amp is producing ringing noises or tends to feedback. Replace the appropriate tube with another of the same type. After just a few hours of operation, your amp is displaying the typical characteristics of old tubes (increased microphonics and noise, treble loss, weak power output, muddy sound). [. . . ] Vor dem Austausch der Sicherung gegen eine dem vorgeschriebenen Wert entsprechende Ersatzsicherung sind die Endstufenröhren auf Defekt zu prüfen. Der Effektweg ist ungewollt aktiv: - Der FX LOOP ist deaktiviert, wenn der Frontplattenschalter, der Stageboardschalter und die Schaltfunktion des Midimoduls offen sind. Ist einer dieser Schalter geschlossen ist der FX LOOP aktiv. Bei aktivem Effektgerät wird der Sound indifferent und "matschig": - Das Effektgerät erzeugt Phasenverschiebungen, die im parallelen Effektweg dem Originalsignal zugemischt werden. [. . . ]