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Summary of Contents for Diezel VH4
- Page 1 Diezel VH4/VH4S Owner’s Manual...
- Page 2 -Opening of the amplifier housing must only be done by authorized personnel. No user serviceable parts inside. -The VH4/VH4S was designed to amplify a guitar signal and can be used only for this purpose. -When transporting the VH4(S) please observe the following: The Diezel VH4 is a vacuum tube instrument amplifier.
- Page 3 Obey impedance requirements! ( see 3.4) The VH4 S cannot be operated in “bridged mono” mode. Once your VH4 is connected to power and the speakers are plugged in correctly, then we can get started! 2.1.2 Power/Warmup/Standby Off First turn the Power switch to on ( facing up).
- Page 4 Should you encounter voltages and frequencies other than those indicated, then a transformer must be used between the power socket and the VH4. This transformer must be able to transform the voltage and frequency to one of the indicated settings. The transformer must also be able to handle the necessary amperage for your VH4.
- Page 5 2.3.3 Causes for Faulty Tubes There are different reasons for failing tubes. Often tubes fail prematurely due to strong vibrations. Tubes are very sensitive to mechanical impacts and vibrations, such as happen when transporting an amplifier or unloading/loading etc. The inside filaments of a tube deform easily and will cause a short inside the tube, resulting in it’s early demise.
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Page 6: Chapter 3 Peripheral Connections
The inserts and loops of your Diezel VH4 or VH4S send signals at higher levels and impedances, which makes this section of wiring less sensitive. You should still use reliable and good quality wiring for all loops and inserts. - Page 7 There are 2 ways to handle effects signals. If you use the serial return, then the signal path of your VH4 is interrupted, the signal is sent to the processor, gets more or less processed, then sent back to the serial return into the power amp. Digital effects units often digitize this signal, then process it, then convert it back to analog, then send it to the amp.
- Page 8 3.2.4 Loop as Second Master Volume Those of you who can live without processors in the parallel loop can use this loop for a second master volume for each channel. To do this, just loop a short 1/4” cable from send 2 to parallel loop return. Now you can choose a second master volume by turning the mix control past 1:00 PM to full open, and push the send 2 button to activate your second master volume.
- Page 9 They make an excellent all round speaker and can cover a wide array of styles. Of course, the VH4 amplifier will also work with other brands of cabinets, including your own favorite.
- Page 10 3.5.1 Midi In Midi in receives “program change” orders from commonly available midi pedals and control systems. The VH4 is able to supply phantom power to your midi pedal via a 5-prong DIN midi cable. Pin 1 and 6 = minus...
- Page 11 Pre-Amp Section of the VH4/VH4S 4.1 Layout The Diezel VH4/VH4S comes equipped with 4 different and totally independent preamps. This allows the artist to play through nearly all musical styles without having to make major changes to his amplifier. The preamps are voiced to deliver the 4 most wanted guitar tone flavors: 1-Clean, 2-Crunch, 3-Heavy and 4-Lead.
- Page 12 Even though tube amplifiers are not typically very quiet amps, you should expect unusually small noise levels from your Diezel amplifier. Some idle noise in channel 3 and 4 is normal, due to the higher gain structures of these channels.
- Page 13 It is possible to use other types of tubes in the Diezel amplifier. This makes this amp more versatile than most other amps and allows you to fine tune your rig to your own special needs.
- Page 14 Red Switches and Switching 6.0 Programming your VH4 It is quite easy to program your Diezel VH4, and easy to explain. Each change in the midi program must be followed by pushing the “Store” button twice. After the first touch, the selected red function switches will blink, then touch again and your program is in memory.
- Page 15 Midi is short for Musical Instrument Digital Interface, and is an internationally accepted Communications system between musical instruments of all kinds. We will only need to learn a small portion of this “language” to use the VH4 and it’s peripheral midi partners. We are going to learn only about “program change” here.
- Page 16 12, then you must hold the “Mute” button down and turn the Preamp channel one selector on, channel two selector on, channel 3 selector off, and channel 4 selector on. If you let go of “Mute” now, then your VH4 is set to respond to Midi channel 12 only. Get it? The table below gives you the sequence for all 16 Midi channels.
- Page 17 Only trained professionals should attempt this procedure. Salwender International and the Diezel Company wish to express their gratitude and congratulate you for your decision to purchase the Diezel VH4 or VH4S Amplifier.
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