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Diamond Decada Owner's Manual

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Summary of Contents for Diamond Decada

  • Page 1 owner’s manual...
  • Page 2 Thank you for the purchase of your new Diamond Amplification Decada 100watt guitar amplifier. This amplifier is of the highest quality and will give you years of enjoyment if it is well maintained. Before you begin, remember, learn your amp and you’ll be in the best position to achieve the tones...

  • Page 3: Table Of Contents

    EFFECTS LOOP ......................8 TONE/VOLUME CONTROLS ..................9 BOOST ........................11 SWITCHING ........................12 FRONT PANEL SWITCHING ................... 12 DECADA CONTROLLER ..................12 ALTERNATE SWITCHING JACKS ................13 TUBES ..........................14 TUBE LAYOUT ......................14 CHANGING/REPLACING TUBES ................14 DIAGNOSING TUBE PROBLEMS ................15...

  • Page 4: Features

    Diamond Amplification’s Decada. This manual will walk you through the features, controls and tonal possibilities available to you.

  • Page 5: Front Panel

    If you are using one speaker cabinet, you can plug into either speaker jack. Make sure your impedance selector is set to the same impedance as the speaker cabinet. If you are unsure of the impedance of your speaker cabinet, please find out before making your connection. DECADA owner’s manual Page 2 of 18...

  • Page 6: Before You Begin

    15 minutes, try to control the volume (challenging for us guitar players, I know – just ask your singer if you don’t believe me) until the amp has warmed up some more. DECADA owner’s manual Page 3 of 18...

  • Page 7: Quick Start Guide

    The higher the volume, the more dramatic the effect. 5. Now switch to Channel 2 and play away! Try varying the “Low Focus” knob again. When varying the “Low Focus” knob, resist the temptation to adjust the other DECADA owner’s manual Page 4 of 18...

  • Page 8: Power/Standby

    “discharge” voltage. Doing this habitually will extend the life of your amp. HALF PO W E R Your Decada also comes equipped with a Half Power switch, which switches your output stage to triode rather than pentode operation. This cuts your 100w amp to effectively half-...

  • Page 9: Dialing In

    The Effects Loop is tube driven. It is wired in series and there is no need to turn it on or off. The Return jack will activate when you put a cable in it. Hence, when you plug a cable in, it turns on. When you unplug it, it’s off. DECADA owner’s manual Page 6 of 18...
  • Page 10 7. Now switch back and forth between the channels setting the Volume controls to a nice, balanced level or vary them from one to the other as desired. DECADA owner’s manual Page 7 of 18...
  • Page 11 So we rolled them to 10 and sometimes still added a pedal. Nowadays, the gain we wanted is built in and sometimes a lot DECADA owner’s manual Page 8 of 18...

  • Page 12: Tone/Volume Controls

    0-4 on the dial. When the presence knob is dialed up north of around 4, you’ll really start to hear the change. If you want your tone more aggressive, roll the presence up. If you want to smooth it out a bit, bring it down. Pretty simple, huh? DECADA owner’s manual Page 9 of 18...
  • Page 13 NOTE: Work your guitar’s volume knob and listen to how well the amp cleans up. Try a setting with more gain, then roll off your guitar’s volume to clean it up, rolling the volume back up for grittier passages or leads. Dialing in Channel 2 (Crunch) DECADA owner’s manual Page 10 of 18...

  • Page 14: Boost

    So we recommend you use the boost as an intermittent feature rather than an “always on” feature. DECADA owner’s manual Page 11 of 18...

  • Page 15: Switching

    SWITCHI N G Your Decada provides you a number of ways to switch your amp. Let’s get familiar with all of them! FRONT PANEL SWITCHING Your amp’s front panel comes equipped with 3 small toggle switches. Switch 1 switches between Channel 1 and Channel 2. Channel 1 is to the right as you face the amp, which is the “off”...

  • Page 16: Alternate Switching Jacks

    (e.g., the Diamond Amplification/RJM Music MAC-2, a Bradshaw (Custom Audio Electronics) switching system, an RJM Music Amp Gizmo, a TC Electronic G-System, a GCX switching system or a simple latching footswitch).

  • Page 17: Tubes

    DA for instruction. But generally, bias should average between 35 and 39 milliamps between the two outside tubes. You will need a Bias King or similar bias probe to check this. DECADA owner’s manual Page 14 of 18...

  • Page 18: Diagnosing Tube Problems

    If you can tell that it is in both channels (even if only slightly on one channel), it is most likely V1, which is common to both channels. A noisy DECADA owner’s manual Page 15 of 18...
  • Page 19 NOTE: It is always advisable to change preamp tubes one at a time. It is a good idea to keep at least one known good preamp tube for this purpose. Then you will know for sure if you have found the problem. DECADA owner’s manual Page 16 of 18...

  • Page 20: Changing Fuses/Voltages (Working With The Corcom)

    CHANGING FUSES/VOLTAGES (WORKING WITH THE CORCOM) DECADA owner’s manual Page 17 of 18...
  • Page 21 Diamond Amplification, Inc. 5261 Langfield Rd. Houston, Texas 77040 713.934.0100 (tel) 713.934.0155 (fax) www.diamondamplification.com...

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