Hafler SE240 manual

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Table of contents for the manual

  • Page 1

    OWNER’S MANUAL HAFLER SE240 POWER AMPLIFIER A Division of Rockford Corporation 613 South Rockford Drive Tempe, Arizona 85281 602 - 967 - 3565 HAFLER SE240[...]

  • Page 2

    SPECIFICATIONS Power Rating: Less than 0.025% total harmonic distortion at any power level up to 120 watts continuous average power per channel into 8 ohms at any frequency between 20 Hz and 20 kHz with both channels driven, Continuous Power Output: Into 4 ohms, below -04% THD, 20 Hz-20 kHz, per channel: 175 watts IM Distortion (IHF): Less than 0.0[...]

  • Page 3

    Input Impedance: 47,000 ohms. Input Sensitivity: 1.2 volts rms for 120 watts into 8 ohms. Slew rate: 10 kHz, 60 volts peak to peak square wave: 45 v/us Damping Factor: 300 to 1 kHz into 8 ohms. 200 to 10 kHz into 8 ohms. Power consumption: 120 watts both channels into 8 ohms: 550 VA Quiescent: 120 VA Size: 5-1/4” high plus 1/2” feet, 17” wide[...]

  • Page 4

    INTRODUCTION The Hafler SE-240 is a two channel audio amplifier which has been engineered to meet high performance and reliability standards while maintaining affordability. The amplifier employs a sonically proven circuit topology driving MOSFET output devices. These devices provide exceptional reliability as a result of their inherent rugged- nes[...]

  • Page 5

    the Hafler transformers are designed to minimize this field, certain cartridges are more sensitive than others, and require separation from the amplifier. Check at a compara- tively high volume setting, swinging the tone arm through its arc. Usually a few inches of added space is all that is needed. Line Connections and Switching The SE-240 is norm[...]

  • Page 6

    running them parallel to power wiring to reduce the likelihood of hum pickup. OUTPUT. The wires which connect the speakers to the amplifier should be of sufficient size to preserve the SE- 240’s high damping factor. Standard #18 gauge lamp cord (zip cord) is satisfactory for up to 15 feet if your speakers are of 8 ohms or higher impedance. A heav[...]

  • Page 7

    Conventional Stereo Connections It is best to make all connections with the SE-240 switched off. Each of the stereo speakers connects to one horizon- tal 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. Co[...]

  • Page 8

    pedance is less than 8 ohms, the SE-240 can deliver more power into the lower impedance. Sound reproduction accuracy is largely a measure of your success in satisfying an illusion of the original. There are few rules for speaker placement. The shape, furnishing and acoustics of the room contribute as much as speaker choice to the overall balance wh[...]

  • Page 9

    Fuses The SE-240 is supplied with a 10 ampere Slo-Blo AC line fuse and four power supply fuses. If one of these fails, it is usually indicative of a fault which will require professional service. FACTORY SERVICE AND LIMITED WARRANTY If you have any difficulties or questions concerning your SE-240 amplifier, please call our Technical Service Departm[...]