User manual HAFLER SE240

[. . . ] Quality components are used in the design to ensure longevity and, above all, sonic excellence. INSTALLATION Ventilation Adequate air flow is important to the continuing reliability of any amplifier. Cool air must be able to circulate freely through the perforations in the cover and under the chassis, and around the heat sinks. It is expected that the amplifier will always be resting on its feet, which should be on a hard enough surface that air flow underneath will not be obstructed. If the amplifier is mounted in a rack, or through a panel, the feet may be removed so long as adequate ventilation is provided through the bottom openings. [. . . ] The SE-240's red and black outputs accept standard banana banana plug connectors, including the double ones with 3/4" spacing. These are the most convenient to use if you will be disconnecting the speakers occasionally. The terminals will also clamp a spade lug, or a bare wire through the hole in the center post. Be sure there are no frayed wire ends which could touch adjacent terminals or the chassis. Tin bare wire ends with solder to secure all strands. Consistent phase relationships are important when connecting speakers in order to enable full bass reproduction as well as mid-range and high frequency time alignment. To be sure all the speakers in a system are wired in phase to the amplifier, each ground or `-' speaker terminal should be connected to its black ground terminal on the SE-240, and the speaker's `+' terminal to the corresponding red binding post. Speaker connecting cable identifies one wire from the other by the color of the wire, or by marking or coloring the insulation. NOTE: In the special case of monophonic operation of the SE-240, described later, different speaker connections are employed. The black output terminals of the SE-240 are connected together internally and grounded to the chassis, This facilitates the use of external devices which use a common ground connection, such as some headphone junction boxes. You must be sure that the ground or shield connection from such a device goes to a black terminal on the SE-240. NOTE: No such connection may be made when the SE-240 is connected for bridged mono operation. 5 Conventional Stereo Connections It is best to make all connections with the SE-240 switched off. Each of the stereo speakers connects to one horizontal pair of red and black outputs, as identified left or right on back of the SE-240. The input signals connect to the corresponding input jacks, and the Mono/Stereo switch should be set to Stereo. Connections for Monophonic Operation When you wish to drive a single loudspeaker with increased power capability, the SE-240 can be operated in a bridged mode which drives both channels with the same signal and combines their output to deliver more than 350 watts into 8 ohms. In this arrangement, the speaker is connected only to the two red output terminals. The left red terminal is `+', and the right red terminal is the `-' connection. No connections may be made to any black terminal. Set the Mono/Stereo switch to Mono, and connect the input signal to the left channel input only. Important Note: Never use a speaker with an impedance of less than 8 ohms when operating the SE-240 in the bridged mode; the increased current output could damage the amplifier. LOUDSPEAKER SELECTION AND PLACEMENT Normal Stereo The SE-240 is designed to deliver more than 120 watts of audio power into an 8 ohm load. This will drive most loudspeakers to a very loud volume level without clipping. Note that speaker manufacturers often specify speaker power requirements in two ways: nominal power (for average volume levels), or maximum continuous power (for momentary loud passages). Our 120 watt rating applies to maximum power levels. [. . . ] Mountain Standard time, at (602) 967-3565. Should you have any doubts as to whether the amplifier is malfunctioning and requires service, please call us before sending in for repair. The Hafler SE-240 is warranted for 3 years from date of purchase, including parts, labor, and return shipping cost from the factory to owner within the continental U. S. It is the owner's responsibility to pay shipping (preferably UPS) to the factory; collect shipments will not be accepted. Units under warranty should be accompanied by a copy of the dated bill of sale. [. . . ]