Manley Labs 75/150 SE/PP 807 MONOBLOCK Read this page Before YOU SET UP the AMPS, Please

READ THIS PAGE BEFORE YOU SET UP THE AMPS, PLEASE

IMPORTANT Never operate this amp without a speaker or load connected. Never drive this amp into a short circuit. Most solid state amps can be operated without a load or speaker and some can drive a short circuit because of protection circuitry. These are different - Like most tube amps the output power is less affected by changing the load impedance within the range of 4 to 16 ohms, however extremes like a short or open circuit are to be avoided. The result could be damage to transformers, tubes. The warranty does not cover this damage if it occurs.

LOCATION & VENTILATION

IMPORTANT - PLEASE PROVIDE A SAFE LOCATION, SUCH AS A LOCKED CABINET, IF THERE ARE CHILDREN OR PETS IN THE HOME.

At the top of the 807 tubes is a ceramic connector. This connector typically carries 630 VOLTS DC when the amplifier is on and afterwards until the power supply discharges. With all the tubes in this is typically 30 seconds.

If you have small children or pets, you should consider placing the amplifiers out of reach to prevent damage to the amplifier or damage to your small children or pets.While these end caps provide sufficient insulation while attached to the tube - there is a shock hazard if they are removed and children can remove them. Manley Labs can supply an optional "Cover" for these amps if needed.

Besides the high voltage, there is another hazard - HEAT. A child, spouse or pet could get a mild burn by touching a hot tube. Tubes produce heat but not as much as a light bulb. Most people do not put exposed light bulbs on the floor but many audiophiles do put tube amplifiers on the floor. Beware that it may be possible to step on an amplifier in the dark or trip on a cable and fall on one. Shades of "Help! I've fallen and can't get up!". The other thing to be aware of is poor ventilation if the amp is on a carpet. There is ventilation holes in the bottom of the chassis that are essential for the long and healthy life of the amp. Ventilation is also important if they are put in a cabinet with a door. Allow a minimum of 2 inches of clearance on the top and sides of the amplifiers, such that a constant flow of air can flow. Do not place amplifiers directly on high pile carpet or any other surface that will block the ventilation vents underneath the amplifiers.

Isolation from vibration is worth considering because this will help to reduce tube microphonic noise and very likely allow the maximum sonic potential that these amps are capable of. Lastly, be aware that some equipment can radiate a strong electromagnetic field. Hum and noise problems are often cured by avoiding stacking electroic gear on top of each other. Distance helps greatly.

GENERAL NOTES

WATER & MOISTURE

As with any electrical equipment, these amplifiers should not be used near water or moisture. If liquid enters the amplifier, it must be immediately returned to your dealer for servicing.

SERVICING

The user should not attempt to service the amplifier beyond that described in the owner's manual. Refer all servicing other than biasing and tube replacement to Manley Laboratories

SPECIAL NOTES

Before turning the amps on - Connect your preamp to the amp inputs. Tubes may become loose during transit. Straighten and press down each tube before plugging the amplifier into the mains socket. Once connections are secure turn the preamp on, wait a minute, turn the power amps on last. Always turn the amplifiers off first, then other gear. This prevents damage to equipment - particularily speakers. Furthermore, do not touch the tubes after the amplifier has been switched on, as the tubes become very hot during operation and should only be handled after the power has been turned off and the tubes have cooled.

WARNING!

TO PREVENT THE RISK OF ELECTRIC SHOCK DO NOT OPEN THE CABINET. REFER SERVICING TO QUALIFIED PERSONEL.