Valve Amplification Company
Phi Alpha Musicbloc 160
Monoblock Tube Amplifier
Instructions
Manual issued 12 March 2008
Please read carefully before installing
Copyright 2008 by Valve Amplification Company. All rights reserved.
Page 1: ...ication Company Phi Alpha Musicbloc 160 Monoblock Tube Amplifier Instructions Manual issued 12 March 2008 Please read carefully before installing Copyright 2008 by Valve Amplification Company All righ...
Page 2: ...will be well rewarded It is our goal to provide instruments of the highest quality be informative to all of our customers and to provide responsive effective customer service Please feel free to cont...
Page 3: ...always turn the amplifier off and remove the AC power cord before detaching cabling Failure to observe this sequence can result in damage to the amplifier speakers or associated components 4 For prot...
Page 4: ...operate the amplifer on carpet or on any other surface that might restrict airflow 5 The amplifier chassis will become very warm during normal use 6 The amplifier must be installed in a secure sturdy...
Page 5: ...ormance try to route the power cord away from signal cables 5 For first installation or when a KT88 tube is changed As the amplifier warms up check the tube bias adjusting output tube bias as necessar...
Page 6: ...rst test switch move to the next test switch and repeat the process and so on until all four tubes have been tested Any tube that can not be adjusted to the correct bias point should be replaced Any t...
Page 7: ...l settings In general we find that a speaker s minimum impedance is more important than its nominal average impedance when determining which setting is correct A lack of bass response often indicates...
Page 8: ...mplifier will meet or exceed all factory performance specifications Before replacing tubes all power must be off Unplug power cord Remove cover and old tubes ONLY after the unit has cooled down In nor...
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Page 10: ...icular application This warranty applies only to the original purchaser and only for units sold in the United States of America through authorized VAC dealers and operated within the U S It covers fac...
Page 11: ...er __________________________________________________________________________ __________________________________________________________________________ What made you decide on the VAC _______________...