Summary of Contents for Hardman GP4
- Page 1 GP4 Guitar Amplifier User’s Guide Copyright © 2011 Hardman Guitar Amplifiers Ltd 27 December 2011...
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Page 2: Important Safety Instructions
12) CAUTION: No user serviceable parts inside, refer servicing to qualified personnel only. 13) The GP4 Amplifier and loudspeaker system is capable of producing very high sound pressure levels which may cause temporary or permanent hearing damage. Use care... -
Page 3: Table Of Contents
Phase together modern innovative technology with the traditional needs of the guitarist. Anti-Fb Reverb The GP4 has been design to give immediate access to the Bright standard functions expected from a guitar amplifier with an 3.10 Effect intuitive front panel. However the GP4 is extremely versatile 3.11... -
Page 4: Introduction
Turn up the Volume as required. configurations. Even the rotary controls (except Input Gain and Master Volume) can have their positions stored and Now have a look at Figure 1.0. for a short summary of the GP4 recalled. front panel functions. - Page 5 GP4 Guitar Amplifier...
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Page 6: Rotary Controls
GP4 Guitar Amplifier 2.0 Rotary Controls Fig 2.0 GP4 Front Panel Rotary Controls 2.2 Tone Controls 2.1 Level Controls 2.2.1 Bass 2.1.1 Tone Controls the level of low frequencies Sets the amount of distortion in the Blues, Rock and Country settings. When the Jazz and Acoustic amplifier operating modes are selected this control has no effect. -
Page 7: Parameter Controls
GP4 Guitar Amplifier 2.3 Parameter Controls 2.3.4 Amplifier Gain/Volume These provide a simple means of controlling the large number of parameters that are associated with the Sets the levels before and after the distortion generation. In various effects. These two rotary controls are of the... -
Page 8: Wah Level/Speed/Location/Glide Direction
GP4 Guitar Amplifier 2.3.9 Wah Level/Speed/Location/Glide direction When the Wah effect is turned On from the front panel it is in Auto Mode. That is the effect is controlled from the guitar signal level. The Level sets the threshold at which the Wah effect begins to operate. -
Page 9: Push Button Switches
GP4 Guitar Amplifier 3. Push Button Switches Fig 3.0 GP4 Front Panel Push Button Switches The filter and gain control operate in front of any The six buttons on the left (14-19) each control two distortion generation. When Rhythm is ON it has its own... -
Page 10: Wah
GP4 Guitar Amplifier Acoustic Mode to get the best working conditions where when all the changes are made, the new values will be an electro -acoustic guitar is the signal source. stored and the Lock condition will be resumed. 3.6 Wah 3.13 Tuner... -
Page 11: Effect (Select)
GP4 Guitar Amplifier of variation of delay and reverb is limited in keeping of 3.18 Channel Copy what can be expected from such units. The entire settings of one Channel can be copied to its Plate provides a bright medium delay, while the Hall neighbour, up or down. -
Page 12: Audio Line Output
GP4 Guitar Amplifier 5. Audio Line Output Low level audio output is available from either ¼" jack or XLR socket. The XLR output is suitable for feeding a balanced line by using signal connections to pins 2 and 3. If an un-balanced output is required from the XLR socket then the signal should be taken from pins 2 and 1. -
Page 13: Getting A Good Distortion Tone
Unlike its operation in a traditional amplifier more volume but with little change in harmonic structure. It that would be at a single fixed frequency, the GP4 Presence has much in common with the Harpsichord, also a plucked Control can operate over a wide range of frequencies from instrument with thin steel strings, and like the Harpsichord 100 Hz up to 4 KHz. -
Page 14: Midi Interface
GP4 Guitar Amplifier 8. Midi Interface 8.1 Introduction The GP4 Amplifier has Midi Input and Thru Sockets. The Thru socket passes out all the data that appears at the Input socket. The Midi input allows the remote control of the main amplifier functions, together with real time control of the Wah frequency and overall volume. -
Page 15: Midi Message Codes
GP4 Guitar Amplifier 8.4 Midi Message Codes Command Byte 1 Byte 2 Byte 3 Volume Control 0 - 127 Wah Frequency Control 0 - 127 Select Channnel 1 Program Change X - don’t care Select Channnel 2 Program Change Select Channnel 3... -
Page 16: Summary Of Parameter Control Functions
GP4 Guitar Amplifier 8.4 Midi Message Codes Command Byte 1 Byte 2 Byte 3 Wah Auto Pre-distortion ON Program Change Wah Auto Post-distortion ON Program Change Wah Pedal Pre-distortion ON Program Change Wah Pedal Post-distortion ON Program Change Wah Auto Pre-distortion Glide Down ON... -
Page 17: Specification
GP4 Guitar Amplifier 10. Specification MODEL: MAINS VOLTAGE: 230 V~, 50 Hz POWER CONSUMPTION: 80 W max. FUSE: 630 mA(T) POWER OUTPUT: SPEAKER UNIT: Celestion G12H 30W Anniversary DIMENSIONS: 430 x 520 x 260 mm (H x W x D) WEIGHT: 16.6 Kg... -
Page 18: Gp4 Signal Path
The information in this manual is subject to change without notice. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, without the express written permission of Hardman Guitar Amplifiers Ltd. All Right Reserved © 2011 Hardman Guitar Amplifiers Ltd...
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