OWNER’S MANUAL
Thank you for the purchase of your new Diamond Amplification Nitrox 100watt guitar amplifier. This amplifier is of the highest quality and will give you years of enjoyment if it is well maintained. Before you begin, remember, learn your amp and you’ll be in the best position to achieve the tones and performance you want. So please take the time to read this manual. Afterwards, enjoy the finest in tone and American craftsmanship – Diamond Amplification.
OWNER’S MANUAL FEATURES............................................................................................................................ 1 FRONT PANEL...................................................................................................................... 2 REAR PANEL ....................................................................................................................... 2 MAKING CONNECTIONS ..............................................................................
Welcome to a new world in guitar amplification. Combine the functionality you want with the tried and true technology of tube tone, wrap that in a completely new approach to the structure of a high gain sound, and unleash the dynamic range of Diamond Amplification’s Nitrox. This manual will walk you through the features, controls and tonal possibilities available to you.
FRONT PANEL REAR PANEL MAKING CONNECTIONS Power. As always, plug your power cable in first. Your amp can be wired for any voltage. This allows you to take your amp all over the world and ensure you’re ready for the voltage you need. Rewiring for an alternate voltage should only be done by a qualified technician. Speakers. Your DA product comes equipped with two speaker jacks. Always ensure, when connecting speakers, that you use a high quality speaker cable.
If you are using two speaker cabinets, you should reduce the impedance to half that of the impedance of the cabinets. For example, if you are using two 16ohm cabinets, your impedance selector should be set to 8ohms, not 16 (if you were using only one 16ohm cab, you’d set the impedance selector to 16). So, for example: Load Amp Setting 1 cab @ 16ohms 1 cab @ 8ohms 2 cabs @ 16ohms 2 cabs @ 8ohms 16ohms 8ohms 8ohms 4ohms Never use your amp without a load! Doing so is likely to damage your amp! Instrument.
BEFORE YOU BEGIN Ensure your guitar is plugged into the front panel “Input” jack. Make sure your amplifier is connected to a speaker (or speakers) and ensure your impedance is set correctly (more on this in the previous section). Flip the “Power” switch up with the amp on standby and let it warm up. A minute or two of warm up is usually recommended before using the amp. As most of you know, a solid 15 minutes is optimal to ensure the tubes are nice and warm.
d. Middle 4.5 e. Bass 7 f. Presence 6 g. Gain B 3 h. Volume B 6 3. Take the amp off standby and try out Channel 1. 4. Now switch to Channel 2A and play away! Last two . . . 5. Toggle back and forth between 2A and 2B to get a feel for the varying tones on lower and higher gain settings. POWER/STANDBY Always keep the Power switch off when unplugging and plugging in to your power source.
People sometimes inquire about the lack of an effects send. There is one. When the loop is engaged, each Volume control becomes that Volume/Gain’s effects send. So, when on the clean channel with the loop engaged, the Volume control on the clean channel becomes the effects send. When on Channel 2, Volume/Gain A, that Volume control becomes 2A’s effects send, and so on. So if you’re clipping your effects, that is the control to reach for. What about that E.
THE TONE/VOLUME CONTROLS The interplay between the volume and gain dictates your tone more than any other controls. So let’s start there. Volume/Gain. As with any amp, the gain control dictates the amount of saturation, break up or distortion of the channel. The higher the gain, the more the channel distorts. Like any good tube amp, this amp is very sensitive to the signal it is being fed.
more than we may ever need. The high end of the gain structure on this amp is capable of potentially surpassing the tube’s ability to keep up. This can result in feedback and squeals. It will also push the tubes beyond where they optimally perform. On your crunch channel, start with your gain at 5 and work from there. On your clean, start with your gain at around 2 and work up. Bass. This is the most incorrectly used control on an amp. Do we all want fat low end? You bet.
Dialing in Channel 1 (Clean) Your clean channel is capable of a huge array of tones ranging from full, round crystal cleans to vintage classic rock crunch including blues/Texas blues tones and everything in between. Our suggestions? Start for true clean tones first. Set the gain around 2, dial your tone controls to 5, bring your volume up to the desired level, then work your tone knobs. For blues tones or more break up, try a few things. Try bringing the gain up first leaving the volume in place.
Dialing in Channel 2 (Crunch) You’ll note the Dual Volume/Gain design of Channel 2. For the moment, let’s forget about Volume/Gain B. Set them to 0 and forget them. You’re crunch channel is also capable of producing a range of tones as well. The most important feature is that as you bring the gain below 5, the amp will brighten. So, if you’re looking for punchier, cleaner and brighter tones, keep the gain down. If you want to make it heavier, bring the gain up above 5.
player, more options live. Two rhythms and a boost for lead? You got it. One rhythm and one lead, forget the boost? All within your control on this amp. SWITCHING Your Nitrox provides you a number of ways to switch your amp. Let’s get familiar with all of them! FRONT PANEL SWITCHING Your amp’s front panel comes equipped with 3 small toggle switches. Switch 1 switches between Channel 1 and Channel 2. Channel 1 is to the right as you face the amp, which is the “off” position of the switch.
ALTERNATE SWITCHING METHODS Your amp’s TRS switching jack on the back panel allows you to control your amp with any device that conducts simple latching tip to ground switching functions (e.g., the Diamond Amplification/RJM Music MAC-2, a Bradshaw (Custom Audio Electronics) switching system, an RJM Music Amp Gizmo, a TC Electronic G-System, a GCX switching system or a simple latching footswitch). The three jacks correspond exactly with the front panel switches.
TUBES TUBE LAYOUT V1 – Common V2 – Channel 1 (Clean) V3 – Channel 2 (Gain 1) V4 – Channel 2 (Gain 2) V5 – Loop V6 – Phase Inverter CHANGING/REPLACING TUBES Preamp tubes have a much longer life than power tubes. You are not likely to have to replace them unless one or more tubes fail. Preamp tubes can have a life span of at least two to three years and usually much longer.
between the two outside tubes. You will need a Bias King or similar bias probe to check this. The bias trim pot, in the event you need to adjust bias, is located on the PCB near the corcom. DIAGNOSING TUBE PROBLEMS Most tube amp problems relate to the tubes themselves. After all, tubes are not the cutting edge of technological advancement. DA tube choices are based both on tone and reliability. Nevertheless, tube problems are not infrequent occurrences.
only slightly on one channel), it is most likely V1, which is common to both channels. A noisy or microphonic tube in this position will affect the entire amp. Microphonic or noisy tubes in several other positions may not be audible at all. You can try tapping the tubes like you did the power tubes and see if the problem worsens. It is normal to hear a slight ring when you tap on preamp tubes. This test is only to see if the identified problem changes when tapping. This test is NOT outcome determinative.
DIAMOND AMPLIFICATION, INC. 5261 LANGFIELD RD. HOUSTON, TEXAS 77040 713.934.0100 (TEL) 713.934.0155 (FAX) www.diamondamplification.
