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Andrews Amplification Spectraverb Operation Manual

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OPERATION MANUAL
08/07/13

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Summary of Contents for Andrews Amplification Spectraverb

  • Page 1 OPERATION MANUAL 08/07/13...
  • Page 3 Thank you for purchasing an Andrews Amplifier. The Spectraverb name signifies a full spectrum of tones and reverberation. The Spectraverb amps feature extremely sweet reverb and work very well with a variety of pedals. As with all Andrews amps, these models are built to the highest standards of craftsmanship and are finely tuned for the ultimate tone.
  • Page 4 HAND-WIRED CONSTRUCTION – Also sometimes called “point-to-point” wiring, • the Spectraverb amps utilize a very high quality turret board made of super- tough G10 composite. This glass-epoxy laminate is specified for its extremely high strength and high dimensional stability over temperature.

  • Page 5: Warnings And Precautions

    Warnings and Precautions During operation, vacuum tubes can reach temperatures over 400 degrees F. Do not touch hot tubes. Insure plenty of ventilation behind the amp. Keep the amp away from children as well as curtains and other flammable objects. Do not expose your amplifier to rain.

  • Page 6: Front Panel

    Front Panel 1. INPUT JACKS – For maximum versatility, we have provided two input jacks (labeled HI and LO). The HI jack provides a bit more drive and sensitivity. The LO jack provides a slight (6dB) attenuation and is useful when a cleaner and slightly darker tone is desired, especially with high output pickups.
  • Page 7 below). The Limit control allows you to set your level for clean tones and keep the same level for higher volume settings such as solos. 8. REVERB MIX CONTROL – For adjusting the mix of reverb signal compared to the dry signal. Use in conjunction with the reverb (Limit) control (see above). On many amps, this control is labeled simply “reverb”.

  • Page 8: Rear Panel

    Rear Panel 1. FUSES – Always use correctly rated fuses or severe damage to the amp may occur. Refer to the rear panel for fuse ratings. Always unplug the amp before replacing any fuses. When installing a new HV fuse, first insert it into the cap of the fuse holder, then while holding only the cap, insert the fuse into the holder, push in and turn clockwise to lock the cap and fuse in place.

  • Page 9: Impedance Selector

    5. IMPEDANCE SELECTOR – Always set this switch to the proper speaker load according to the chart below. Note: The Spectraverb 1X12 combos incorporate built-in 8 ohm speaker loads so leave it set to 8 when not connecting another cabinet.
  • Page 10 FOR TECHNICAL TYPES We have provided this information for those who have a technical interest, proper equipment and a DIY attitude. CAUTION! GUITAR AMPLIFIERS CONTAIN LETHAL VOLTAGES. If you have any doubt about your ability to safely perform this procedure, refer the job to a qualified technician! Bias Adjustment Procedure: Precautions: •...

  • Page 11: Tube Replacement

    TUBE REPLACEMENT Precautions: Always unplug the amplifier and allow the tubes to cool completely before touching them. It is absolutely necessary to adjust the bias when replacing the output tubes. When to replace tubes: Preamp tubes such as 12AX7 and 12AT7 will generally last for many thousands of hours but occasionally problems can development before they “wear out”.

  • Page 12: Limited Warranty

    LIMITED WARRANTY – Valid in USA and Canada only Andrews Amp Lab Inc. warrants this product to be free of defects in materials and workmanship for a period of five (5) years from the original date of purchase to the original purchaser.

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