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zie4 Amplification dcie Tube Amplifier Owner’s Manual
Congratulations and thank you on your selection of a zce all tube guitar amplifier. Please read this manual before operating your amp. Tube amplifiers contain potentially lethal voltages even after they are unplugged that may cause injury or death. Do not attempt to repair or modify any amplifier unless you are absolutely certain you are qualified to do so. To reduce the risk of fire or shock hazard do not expose the amp to moisture. Plug the amp into a 3 prong grounded AC outlet only. Do not alter the AC plug. Output tubes run very hot. Turn off amp and let it to cool before replacing tubes. Never operate the amp unless a speaker is connected to one of the speaker jacks; doing so may damage the output transformer and will void your warranty. Replace all tubes and fuses using only the same types. If you remove the chassis from the cabinet be careful not to dent the edges of the faceplate.
Front Panel Input Jacks Connect musical instrument(s) to amp. Volume Controls input gain. Gain Blends the passive EQ (Treble, Mid, & Bass) controls out of the preamp circuit and restores the gain that is typically lost in the passive EQ section. Gain Pull Bright Switch Pulling the control out increases treble response. Treble, Midrange, Bass Control equalization. Master Volume Controls preamp output level and overall volume. Lamp Glows when AC is on. -
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Rear Panel Fuse Holder Holds 1 amp type 3AG slow blow fuse. AC Cord Plug into grounded 120 VAC outlet. AC Switch (Power) Controls electrical power to amp; turn up to operate. Speaker Jacks One speaker and one extension. See Speakers. -
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foot Switch Jack Connects to a push on push off type foot switch to turn the Gain function on or off. The foot switch should have a shielded cable. —
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Operation Plug guitar cord into an Input Jack. With Volume and Master Volume controls set low, turn AC switch to on position (up). It will take less than a minute for the tubes to warm up and the amp to operate. The Volume, EQ. Gain, and Master Volume controls interact with each other in a way that may not be apparent. See “Suggested Settings” before use. Speakers. When using one speaker, always plug into the Spkr jack. Use the Ext jack when a second speaker is used. The output impedance is 8 ohms and the impedance of the stock speaker is also $ ohms. It is possible to connect the speaker output to a load of 4 to 16 ohms without causing any problems. Never operate the amp unless a speaker is connected to a speaker jack. Doing so may damage the output transformer and will void your warranty. fuse replacement. Unplug the AC cord before replacing fuse. Use only 1 amp type 3AG slow blow fuse. A fuse that blows repeatedly indicates the amp is in need of service. Tube replacement. Unplug the AC cord and allow tubes to cool for five minutes. To replace small preamp tube remove the aluminum shield and gently pull the tube out using a slight circular rocking motion. To remove the large power and rectifier tubes, push both sides of the retaining clips away from the base of each tube and pull with a circular motion. To install tubes, ensure that the gap between pins on a small tube (or the key in the base of a large tube) aligns properly with each socket. Power tubes generally need replacing every one to three years, depending upon how often and hard the amp is used preamp and rectifier tubes generally last much longer.
Suggested Settings Any numerical reference to a control setting assumes a scale of 0 10, with 0 fully counterclockwise, 10 fully clockwise, and 5 straight up. for “Clean” tones: Leave Gain at 0 and Master Volume at 10. Adjust Volume, Treble, Midrange, & Bass for desired tone. The sound will begin to distort as the Volume is turned past 5 or so, depending on the guitar and picking technique used. To add some “Crunch”: Start with a clean setting and turn the Gain to 1 or 2. The amp will get considerably louder as the Gain is turned up. When the Gain is set at 4 or above, it effectively removes the EQ from the circuit and the Treble, Midrange, & Bass controls no longer have any effect. THIS IS PERFECTLY —
NORMAL. When the Gain is set at 4 or above, use the tone control(s) on your guitar to affect the tone. For “Distorted” tones: Set Volume and Gain in a range of 4 10. Overall volume can be reduced by turning the Master Volume down from 10. Spend some time experimenting. Try the Gain on 10 and gradually turn up the Volume to increase distortion. Or turn the Volume to 10 and adjust the Gain. For maximum distortion, set both the Volume & Gain to 10 and control overall volume with the Master Volume. A small, low-powered tube amp like this will generate distortion in both the preamp and power tubes. The Master Volume is “between” these tubes in the circuit. Turning it down will reduce the power tube distortion and “clean up” the sound to a certain extent. Gain Foot Switch: Connecting a foot switch to the rear panel jack allows you to toggle between the sound & volume produced by the setting of the Gain control and the sound with the Gain set at 0. By setting the Gain around 2-4 this can be used as a boost for solos. The Bright Switch is more effective at lower settings of the Volume control. —
Tube Layout Looking at the rear of the amp from left to right: 5AR4, 6V6 or 6L6, 12AX7
Limited Warranty U4
Amplification will repair or replace defective materials or workmanship for a period of three years without charge. Vacuum tubes and lamps carry a ninety day warranty; Eminence speakers are covered by their own seven year warranty. This warranty applies only to the original purchaser. Please retain your sales receipt as it is your proof of purchase. This warranty does not cover neglect, abuse, or transportation costs. For warranty service contact: Amplification P.O. Box 514 Mattapoisett, MA 02739-0514 508-287-2339 U€2
