Marshall JH1

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Product Description

Marshall JH1 Marshall JH1 Introduction Since we began in 1962, the Marshall name has been synonymous with high quality distortion tones. Initially the way to get classic Marshall distortion was to naturally overdrive one of our valve amps by cranking it up to full volume. As time went by our Master Volume heads allowed the generation of more extreme levels of distortion as the pre-amps valves were driven into overdrive. Our first generation pedals simulated these various valve amp type distortions in convenient, cost effective stomp boxes. The Jackhammer is the next step on from previous Marshall distortion pedals. It contains our most extreme distortion levels to date, combined with a Contour section that allows you to not only scoop out the mids, but also choose the frequencies at which the scoop occurs. This means that you can tailor your sound to your own individual requirements. Although the Jackhammer has more aggresion and gain than any other Marshall pedal, we never forget our heritage. The sounds contained are always natural and realistic, like a super high-gain valve head pushed to the max.The Jackhammer features two modes; Overdrive and Distortion. Overdrive delivers an open crunch for that classic Marshall roar, whereas Distortion gives you a smooth and singing compressed high gain tone. The Jackhammer features a passive bypass for the main signal path, to ensure complete tonal integrity and has a quality of tone matched only by its versatility. Here follows a complete run down of the Jackhammer's features for your information. We have also enclosed a number of suggested settings to help guide you. It should be remembered that these are only suggested settings and you should experiment as much as possible. If you take the time to explore the many different overdrive and distortion characters of the Jackhammer, you won't be disappointed. Features Marshall JH1 Features: Jack Socket This is the output of the Jackhammer and is for connection to the amplifier or to another effects pedal. Mode Allows for selection of the Jackhammer's two modes; Overdrive and Distortion. Overdrive gives you traditional Marshall open roar,similar to JCM 800 style Master Volume models with more bite and dynamics. Distortion Mode delivers a more saturated high gain compressed tone, similar to the high gain channels on JCM 2000 models. Gain This increases the amount of distortion, taking you from vintage Always use good quality shielded leads. Always use 9V regulated DC supply with centre negative. Although it may seem obvious the first action in achieving a good effected sound (be it duration / compression etc.) is to find the perfect bypassed sound. This will then allow the correct level to be set with the effect unit to allow a cut or boost in volume and a realistic tone. On clean channels it is advisable to set the gain (or volume) to a setting of no less than one quarter maximum so as not to get unrealistic results due to any volume dependent tonal shaping on breakup, ideal for big crunchy chords, sweet singing blues and classic rock on Crunch mode; and from powerful overdrive to full on high gain distortion and compressed super saturation on the Lead mode. Volume Adjusts the volume of the Jackhammer, allowing you to set the pedal for a boost or cut in volume when in operation, should you so wish. DC Input For input of a 9V DC adaptor (as detailed previously) should you not wish to use batteries LED Indicates when the Jackhammer is in operation. Treble Adjusts the Treble frequencies in your tone. Bass Adjusts the bass frequencies of your tone. Contour Freqv. By adjusting the Contour Freq. you can govern exactly which frequencies the Contour control (item 9) will scoop. With the Contour Freq. set at 12 o'clock the Contour acts like a traditional Marshall Contour control. Turning the Contour Freq. anti-clockwise cuts lower mids and bass from your tone, while turning the Contour Freq. clockwise will cut upper mids and treble. Contour The Jackhammer features a stunning Contour control, modelled on the acclaimed Contour circuitry found on our Valvestate models. This allows you to 'scoop' certain frequencies from your tone. This item controls the amount of scoop in your tone. Turning clockwise will scoop out more mid. When full counter-clockwise the Contour section, including the Contour Frequency control, is bypassed. Jack Socket This is the input jack, for connection from your guitar or from another effects pedal if you are linking pedals together. Foot Switch For switching the Jackhammer on and off. Battery Replacement To replace the battery, open the easily accessed coin screw battery cover plate by loosening screw as shown, then disconnect the battery connector lead. Use PP3 or equivalent battery (for improved battery life use alkaline type)Always ensure that the battery is removed when the pedal is not in use for long periods. Dispose of old battery in a safe place. Marshall JH1 Specification: Power: 9V DC Centre Negative Regulated Current Draw: 13mA Controls: Overdrive & Distortion Mode, Gain, Volume, Bass, Treble, Contour & Contour Frequency controls Switches: On/Off Switch Indicators: On/Off LED Jacks: Input/Output 'Jacksockets' Input Impedance: 1M 1/2 Output Load Impedance: 20k 1/2 Dimensions: 120mm x 65mm x 55mm Weight: 510 grammes Get your Marshall JH1 today!