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Table of Contents
Related Manuals for Phil Jones Bass PJB DOUBLE FOUR
Summary of Contents for Phil Jones Bass PJB DOUBLE FOUR
- Page 1 PJB DOUBLE FOUR OWNER’S MANUAL...
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Page 2: Read This First
Thank you for purchasing the PJB DOUBLE FOUR. A great deal of dedication and passion went into designing and building this no compromise, high performance compact-combo amplifier. It was conceived to be a dedicated amplifier for the “connoisseur” bassist. Reading this manual will enable you to get thebest performance from it so that you may enjoy many years of service. - Page 3 OVERVIEW OF THE DOUBLE FOUR With the great success of the PJB Bass Cub, we had many requests to make a truly affordable bass practice amp. There were two major obstacles: it had to be small and have the great PJB sound. Using existing parts we could not achieve our goals so we started from scratch with new driver design, acoustic loading and the latest digital amplifier technology.
- Page 4 Each speaker is fed with its own Pulse Width Modulation PWM amplifier. PWM amplifiers are extremely efficient compared to more traditional analog solid state amplifiers converting more electrical energy to power the speakers instead of getting hot. Heat in electrical circuits is the enemy to reliability and since the amp is running at lower working temperature, the DOUBLE FOUR will give years of service long after other amps have faded away.
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Page 5: Panel Description
PANEL OVERVIEW PANEL DESCRIPTION 1. Input Jack This is a high impedance input and is designed for all passive and active instruments. 2. Clip Light. When the amplifier output is clipping, the LED will light up with red. When the amplifier muted, the LED will light up with green. - Page 6 6. Mid Range Control This gives the "voice" of your instrument. Generally you will find that cutting this control instead of boosting will have more of a truer bass sound. Boosting may be useful for soloing or special effects. 7. Treble Control This gives the instrument the definition to the sound.
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Page 7: Operation & Positioning
OPERATION & POSITIONING TURN THE VOLUME DOWN on the DOUBLE FOUR before plugging in your instrument. You may notice the clip light blinks once on turn on. This is normal and the amplifier is functioning correctly. It is just a characteristic of the circuit. Positioning the DOUBLE FOUR for Best Sound Often, playing in different venues will cause your bass to sound different. - Page 8 Unfortunately for bass players, low frequencies are always very difficult to control with room acoustics. The reproduced wavelengths of the notes you are playing often correspond to the room dimensions, in which case the reflected sound off the walls interferes with the sound from the speaker as you get further away from it.
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Page 9: Specifications
SPECIFICATIONS Speaker Rectangular Auxiliary Low Frequency Radiator (RALFR®) Enclosure Speaker Frequency Response: 60Hz – 15KHz Speaker Compliment: 2 x 4 inch proprietary, extended-range drivers Internal Speaker Impedance: 4 Ohms Amplifier 70watt, digital amplifier with DSP. (Digital signal processing) Signal to Noise Ratio Better than 84 dB (EQ off, Volume on Full.) Impedance High Input: >1MΩ/22pF... -
Page 10: Service & Warranty Information
SERVICE/WARRANTY INFORMATION The DOUBLE FOUR has a warranty period of 2 years, starting from the date of purchase. The buyer must complete and return the enclosed warranty card within 14 days of purchase. This warranty covers defect in materials or workmanship that occurs in normal use. Within warranty period PJB will repair or replace the defect unit free of labor and parts charge.
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