Manley AMPLIFIERS Owner's Manual

Contents

Manley AMPLIFIERS Owner's Manual Manual pdf 8 page image

OPERATIONAL NOTESSWITCHING ON -- SOFT STARTThe MANLEY NEO-CLASSIC 250's & 500's are equipped with a SOFT-START circuit whichreduces the cold-start current draw which makes things easier for your house breakers and thepoor tubes and capacitors in the amps. We recommend that you use this soft start turn-on featuresequence whenever you turn the amplifier on and especially when you turn it on from cold.1. Ensure that the right-most "mains" switch on the front panel is in the "off" or "0" or DOWNposition and the OPERATE / STANDBY switch is also DOWN in the STANDBY mode.2. Turn on preamplifiers and all your source components and let them warm up for a minute.3. Switch the right-hand mains power switch to the ON position and allow the amplifier a minuteor so to 'warm up'. The blinking LED will indicate that the amplifier is in STANDBY mode.4. After a minute or so, or more if you like, engage the soft-start switch UP to the OPERATEposition. The blinking standby LED will extinguish.5. The MUTE switch just prevents tunes coming into the amplifier. It grounds them out. UN-MUTE this switch if you had it on, turn up the volume on your preamp and enjoy.6. To shut the amps off, you can flip the mains power switch down first, which will shut off powerto the amplifier.THE EVER-WARM MODEAfter your listening session, if you wish to leave the amplifier in the energy-saving and 'EVER-WARM'STANDBY mode, engage the OPERATE/STANDBY switch to the STANDBY position. The standbyblinking LED will remind you that the amplifier is in STANDBY mode. The amplifier will draw only400mA (30 watts @120VAC) from the mains outlet-- certainly an energy saving way to keep youramplifiers warmed up and always ready to listen to!TRIODE / TETRODE OPERATION:With the TRIODE / TETRODE switch, the amplifier may be set for TRIODE or TETRODEoperation. When the switch is in the lower position, the amplifier is in TETRODE mode which willproduce just over 250 watts in the 250 model, and, as you might expect, just over 500 watts in the 500model. When the switch is in the upper position, the amplifier is in TRIODE mode which willproduce about half the power of TETRODE operation. For some more demanding energetic music,large rooms, or for power hungry inefficient loadspeakers, you might find you will need the extrapower of tetrode operation. Other times and other situations will find you very well satisfied with thesweet and seductive triode mode. One major rule applies for switching between triode and tetrode:THE AMPLIFIER MUST BE TURNED OFF BEFORE SWITCHING BETWEENTRIODE AND TETRODE!!!!Follow turn on SOFT START procedure above when re-powering up the unit. Do not ever flip rapidlyback and forth between triode and tetrode or you'll probably blow something up. Set it. And forget it.TUBE LIFEYou should expect extended life from the tubes in your MANLEY 250's & 500's if you adhere to theprocedures described above and check your bias at least once every 2-3 months.FUSESThe fuses used in your amplifier are standard 1/4" x 1 1/4" SLO-BLO Ceramic types. The correctlyrated fuse has been installed at the factory for your country's voltage. If replacing a fuse, alwaysunplug the amplifier's power cord from the wall outlet and always use the exact same type and ampererating fuse as the one you are replacing. Failure to do so will void your warranty and can be adangerous fire hazard. NEVER replace a fuse with thick wire, tin foil, gum wrappers, or anything elseother than the correct fuse!8