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Фрагмент инструкции
Be sure to read this manual carefully and follow these instructions in order to keep your unit performing and sounding its best. Please contact Sonic Frontiers if you have any questions, a Customer Service Representative will be pleased to assist you. WHAT’S IN THE BOX? In addition to the Amp 1, it’s cover, and the operating manual you are presently reading (with associated inserts and warranty card), there are a few more items to take inventory of before steps are taken to make the Anthem Amp 1 operational. These items are: • 2 12AU7 tubes • 1 12AX7 tube • 4 EL34 tubes* • a glove for handling the tubes • a detachable AC power cord • a handful of phillips screws • a phillips screwdriver After completing an inventory of these items, proceed to the next steps. *These tubes are carefully measured and matched in pairs. Take extra care to keep them from being mixed and mismatched which would degrade performance. AB C DED CONTROL FUNCTIONS A L E D When the LED is lighted the Amp 1 is “ON”, receiving power from the power supply. B ON -OFF BUTTON When in the ON position (button depressed), high voltage power is received by the Amp 1 circuitry from the power source. Due to the warm up characteristics of tubes, it will take 30 seconds for the tubes to pass full signal. It is suggested that the Amp 1 remain muted or the Volume turned down for this first minute. When in the OFF position (not depressed), the Amp 1 is not receiving power and is not operational. CONNECTION FUNCTIONS C D E TACHABLE AC POWER CORD SOCKET Plug the Detachable Power Cord into this socket (see Figure 2). The Amp 1 is factory set for the correct operating voltage for the area in which it is sold (see shipping box for voltage setting). If a different operating voltage is required, please contact an authorized Sonic Frontiers or Anthem dealer, distributor or the factory directly. D SPEAKER CONNECTION POSTS These 5 way binding posts accept a connection from one pair of speakers. The negative connections are to be made to the black connectors; left speaker to the terminals marked left and right to the terminal marked right. The positive connections are determined by the speakers. If the speakers impedance tends towards an 8 ohm load, use the left and right positive (red) posts labeled as 8 ohm. If the speakers are better represented by a 4 ohm load impedance, use the positive connectors labeled 4 ohm. Consult your speaker specification sheet, manual or manufacturer directly if there is any clarification needed regarding the impedance of your speakers. NOTE: ONLY O N E PA I R OF POSITIVE C O N N E C T O R S M AY B EU S E D AT A TIME. UNDER N O C I R C U M S TA N C E S A R E T W O PA I R O F S P E A K E R ST O B E C O N N E C T E D T O BOTH 4 OHM A N D 8 O H M P O S T S . Refer to Figure 2 for further instruction. E PREAMPLIFIER INPUT This input accepts RCA input connections from an external preamp or crossover; connect left channel to left channel and right channel to right channel. FIGURE 2 Top figure shows a connection to a loudspeaker with an 8 ohm impedance, lower figure shows a connection to a speaker with 4 ohm impedance. WARNING-DISCONNECT THE A C D E TA C HA B L E P O W E RC O R D F R O M T H E AMP 1 AND WAIT 5 MINUTES BEFORE REMOVING COVER, TUBES OR FUSE. S E T T I N G U P The Amp 1 comes with seven (7) tubes, as follows: 12AX7 (V2) FIRST STAGE AMPLIFICATION TUBE The first stage of amplification in the amplifier section of the Amp 1 is achieved through the use of this dual triode, amplifying both channels, one per triode section. The 12AX7 may be replaced with the ECC83 or 7025A tube. 12AU7 (V1 & V3) DRIVER TUBES These tubes split the phase of the signal and drive the push/pull pairs of power tubes. The 12AU7 tubes may be replaced with ECC82, E82CC, ECC802S, 5814A, 6189, CV4003 or M8136. 12BH7A tubes may also be used with a slight increase in performance. EL34 (V4,V5,V6,V7) POWER TUBES These tubes provide the last stage of amplification, set up in push/pull pairs (2 tubes per channel). The output stage uses an adjustable fixed biasing scheme which has been carefully adjusted at the factory to match the characteris tics of the output tubes shipped with this unit. The Bias adjustments should remain reasonably stable over the life of the output tubes and should not require periodic adjustment until the EL34 tubes are replaced. Should one of the EL34 tubes fail, it may be replaced individually, as separate bias adjustments allow optimizing the operating conditions for each tube. For best performance, tubes in the pair V4 and V5 or V6 and V7, should be replaced with a matched pair. EL34 output tubes are interchangeable with and may be replaced by 6CA7, E34L, and KT77. Other tube substitutions are not recommended. WARNING: Tube replacement and bias adjustment involves working with the covers off and power applied, around hazardous and potentially lethal voltages, and should be performed only by qualified personnel with the proper equipment and trai...