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Warwick ProTube IX, ProTube IV owner manual Channel 1 Tube

Models: ProTube IX ProTube IV

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CHANNEL 1 - TUBE

This channel is equipped with two tubes. One preamp tube is always included within the signal flow.

2ND STAGE switch adds one output stage tube into the circuit. This feature offers the choice between a so called hybrid amplifier (tube preamp with transistor power amp) and the sound of an all tube amplifier head.

CONTOUR switch boosts bass and treble at once. CRUNCH control adjusts the tube pre- amplification.

TONE control sets the basic sound characteristics (frequency control 300 Hz - 14 kHz, see below). LOW B/C 3-way switch for the boost/flat/cut of sub-bass frequencies. In boost position (red LED) the bottom-end is boosted, in cut position (yellow LED) it remains unmodified, but the deep-mids region is attenuated to obtain a clearer sound (chords, tapping, harmonics, etc.).

MID B/C 3-way switch for the boost/flat*/cut of the frequency determined via TONE control. In boost position (red LED) this frequency is boosted, in cut position (yellow LED) it is attenuated.

*The respective frequency will be slightly boosted when the switch is centered (flat). All boosts and attenuations are less intense in deeper frequency ranges than in higher spectra (300 Hz +6/+12 dB, 14 kHz +15/+20 dB, flat/boost).

HIGH B/C 3-way switch to boost/flat/cut high sound attributes. In boost position (red LED) treble is boosted (fixed preset), in cut position (yellow LED) the TONE control works as a low- pass-filter, means that frequencies higher than the TONE control setting are eliminated. Moreover the MID-boosts are softened by about 5 dB.

As you can see, the three 3-way switches and TONE control act in a very complex way. Therefore I would like to introduce some remarks and suggestions regarding sound adjustments:

1.Simulation of different pickup charact- eristics:

Each pickup has a peak in its resonance frequency in excess of which no treble can be transmitted. The main distinction in sound characteristics between different pickups is that this frequency is located elsewhere depending on pickup types. This is exactly what you can simulate in switch positions

MID boost and HIGH cut by shifting the resonance frequency with the TONE control (12 o'clock until full clockwise position). This requires that the resonance frequency of your bass pickups lies beyond that of the desired simulation. Furthermore this adjustment allows to boost highest trebles that your bass can produce, by cutting even higher pitches so as to diminish unnecessary noise.

2.Speaker Emulator (when CRUNCH is drivenIX highly until distortion):

In case you have adjusted a distorted sound with the CRUNCH control and use a loudspeaker cabinet with tweeter (or send the sound via the DI OUTs to a mixer), you should eliminate high- pitched frequencies with HIGH cut, as they can be very unpleasant for the human ear. When

MID boost is activated at the same time, the sound

will be more aggressive, whereas the simultaneousTube use of MID cut results in a smooth but however

deeper cut of treble (see graph).

If necessary you can turn the TONE control further clockwise.

3. Semi-parametric EQ:

When the MID 3-way switch is set to boost, flat

(center position, slight boost) or cut, you can pre- adjust the basic timbre of your sound with the TONE control like with a semi-parametric filter. As already mentioned, the degree of boosts or cuts depends on frequency ranges. These have been determined so as to obtain efficient results by quick adjustment.

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Warwick ProTube IX, ProTube IV owner manual Channel 1 Tube
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ProTube IX, ProTube IV specifications

The Warwick ProTube IV and ProTube IX are two notable amplifier series from the renowned German instrument manufacturer Warwick, widely recognized for their commitment to producing high-quality musical equipment. Both models are designed for bass players seeking exceptional sound quality, versatile features, and reliable performance on stage and in the studio.

The Warwick ProTube IV is distinguished by its powerful 450-watt output, delivering a wide dynamic range that ensures clarity and punch across various musical styles. One of its standout features is the innovative hybrid design, combining both tube and solid-state technologies. This design provides the warmth and character often associated with tube amplifiers, while also leveraging the reliability and headroom of solid-state components. This hybrid approach results in an amp that produces rich harmonic overtones and a full-bodied sound, satisfying the tonal preferences of many bassists.

Additionally, the ProTube IV sports a comprehensive set of tonal shaping options. Its dual-channel design allows musicians to switch between clean and overdriven sounds seamlessly. Built-in controls for gain, treble, mid, and bass frequencies give players extensive customization capabilities, enabling them to dial in their ideal tone. Furthermore, the amp features a balanced DI output, making it easy to connect to recording equipment or a PA system for live performances.

On the other hand, the Warwick ProTube IX ups the ante with its robust capabilities and innovative technologies. Featuring an impressive 800-watt output, this amplifier is designed for the professional bassist requiring reliable performance in demanding environments. Similar to the ProTube IV, it utilizes a hybrid architecture, blending the richness of tube warmth with the power and stability of solid-state circuitry.

The ProTube IX is equipped with advanced signal processing technology, including a built-in compressor and EQ section that allows for further tonal customization. The compressor provides control over dynamics, ensuring that each note is articulate and well-defined, even in high-volume situations. Additionally, the amplifier includes a range of connectivity options, such as headphone outputs and an AUX input, catering to modern players' needs.

Both models come housed in rugged enclosures, designed to withstand the rigors of touring and consistent use. Their user-friendly interfaces streamline operation, letting musicians focus on their performance rather than technical details.

In summary, the Warwick ProTube IV and ProTube IX represent a fusion of reliable engineering and tonal versatility. Their unique features and advanced technologies make them suitable for a wide range of bass players, providing the power and sound quality necessary for both live performances and studio recordings.