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Summary of Contents for Aiken Amplification Intruder
- Page 1 Intruder User's Manual Aiken Amplification, Inc. 1225 Montague Avenue Greenwood, SC, 29649 Tel: 864-993-8383 http://www.aikenamps.com...
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Page 2: Table Of Contents
Contents Getting Started.....................3 Front Panel Controls and Switches..............5 Rear Panel Controls and Switches..............7 Tube layout and replacement................9 Biasing........................11 Speakers......................13 Troubleshooting....................14 Specifications....................17... -
Page 3: Getting Started
Solid, finger-jointed birch-ply cabinet. The head is 20" wide, 8 ¾” tall, and 9” deep. The 1x12 combo is 23" wide, 18 1/2" tall, and 10 1/4" deep. IntruderMKIIManual.doc 06/17/13 Page 3 of 17 Copyright 2004-2011, Aiken Amplification, Inc. - Page 4 Available in a head configuration or a small-box combo format with a single 12” speaker. Our Aiken A12L speaker, which is based on the tone of a Greenback, but with better low end response, is standard. IntruderMKIIManual.doc 06/17/13 Page 4 of 17 Copyright 2004-2011, Aiken Amplification, Inc.
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Page 5: Front Panel Controls And Switches
Volume 2 is the "dark" channel volume control. Treble: The treble control adjusts the high frequency equalization. Middle: The middle control adjusts the midrange frequency equalization. Bass: The bass control adjusts the low frequency equalization. IntruderMKIIManual.doc 06/17/13 Page 5 of 17 Copyright 2004-2011, Aiken Amplification, Inc. - Page 6 Glory switch is turned on. When turning the amplifier off, the Glory switch should first be turned off, then the power is turned off after a few seconds. IntruderMKIIManual.doc 06/17/13 Page 6 of 17 Copyright 2004-2011, Aiken Amplification, Inc.
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Page 7: Rear Panel Controls And Switches
"Y" cables for the extra two cabinet connections. Be sure to use only quality speaker cable - IntruderMKIIManual.doc 06/17/13 Page 7 of 17 Copyright 2004-2011, Aiken Amplification, Inc. - Page 8 LED is lit (if there is one) and the clip LED occasionally lights on peaks or doesn’t light at all, depending on the effect’s requirements. Then adjust the effects unit’s output level so the Intruder’s volume is the same with the insert cable plugged into the back of the amp or unplugged.
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Page 9: Tube Layout And Replacement
Tube layout and replacement The Intruder uses four ECC83/12AX7 tubes and two 6BQ5/EL84 output tubes (or two EL34 tubes in the 30W or 50W version). The preamp tube function is as follows, starting at the side closest to the input jack: preamp 1 (ECC83/12AX7), preamp 2/cathode follower (ECC83/12AX7), effects loop driver/receiver (ECC83/12AX7), and phase inverter(ECC83/12AX7). - Page 10 Output power reduction by using 6V6 tubes (30W models only): It is possible to reduce the power of the 30W Intruder to around 18W to 20W by changing the two EL34 output tubes to 6V6 tubes. The amplifier will need to be rebiased before using, to insure the tubes are running at a safe idle current .
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Page 11: Biasing
"hot spot" near the center of the plate, sometimes accompanied by a "hot" smell and some "ticking" noises as the metal expands. Continued operation with glowing plates will soon IntruderMKIIManual.doc 06/17/13 Page 11 of 17 Copyright 2004-2011, Aiken Amplification, Inc. - Page 12 The HT fuse should prevent any major damage to output or power transformers, or other expensive components. IntruderMKIIManual.doc 06/17/13 Page 12 of 17 Copyright 2004-2011, Aiken Amplification, Inc.
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Page 13: Speakers
Celestion Greenbacks have less volume and a dip in the mids, which makes them nice and smooth. They are rated at 25W, so they make a nice match for the Intruder 18, but are a bit under-rated for the Intruder 30 in a 1x12 configuration. Celestion Alnico Blues are by far the... -
Page 14: Troubleshooting
Is the insert cable fully plugged into the jack on the back of the chassis? Is the effects unit designed for pro level (0dBu nominal, +4dBu max) levels? The Intruder will not work with “stompbox”, or guitar-level effects, as they are designed for very low guitar signals. - Page 15 Excessive levels of hiss are usually caused by bad preamp tubes. Some preamp tubes have more hiss than others. Try replacing the preamp tubes with different ones to see if the hiss decreases. IntruderMKIIManual.doc 06/17/13 Page 15 of 17 Copyright 2004-2011, Aiken Amplification, Inc.
- Page 16 In rare cases, the EL84 or EL34 output tubes can be microphonic, particularly if they are at the end of their lifespan. IntruderMKIIManual.doc 06/17/13 Page 16 of 17 Copyright 2004-2011, Aiken Amplification, Inc.
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Page 17: Specifications
1x12 Combo: 25”W x 18 ½”H x 10 ¼”D Weight: 18W head: 22 lbs 30W head: 29 lbs 50W head: 29 lbs 18W combo: 45 lbs 30W combo: 52 lbs 50W combo: 52 lbs IntruderMKIIManual.doc 06/17/13 Page 17 of 17 Copyright 2004-2011, Aiken Amplification, Inc.
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