Presence Select Footswitch, Ventilation

Pentode/Triode

The first guitar tube amps from the 30’s and 40’s utilized TREIODE power amp tubes. Since triodes tend to emphasize even-order harmonics, these amps had a very typical sound with a warm even tone, even when overdriven. Great for sweet, warm, full, fat blues.

To obtain higher power levels, tubes were developed in the 50’s with 5 electrodes (PENTODES), and these have since become standard in all tube amplifiers. PENTODES likewise have their own typical effect on the sound. Even-order harmonics are neutralized, odd-order harmonics stand out. This adds richness to the character of the sound, but also makes it rougher, with an “edge”, lending itself spectacularly to rock-oriented music.

Each of the two channels of the VS 250 can be switched separately from PENTODE to TRIODE mode. The power in triode mode is reduced to 25 watts RMS per channel; the sound character changes as described above.

Please remember: for technical reasons, the effect of the presence control will be much more noticeable in pentode mode than in triode mode, and will be more noticeable the more overdriven a guitar sound you use!

Presence Select Footswitch

Connect a commonly available on/off footswitch to this jack, and you can alternate between PRESENCE 1 and PRESENCE 2. If only one footswitch is connected, both channels will be switched simultaneously.

Ventilation

Heat generated by the tubes in the VS 250 is transferred to a heat exchanger, which is cooled in turn by an extremely low-noise fan. This design prevents excessive heat build-up in the housing, and ensures even cooling of the tubes. Please see to it that the ventilation slots on both the front and the back of the VS 250 are not blocked.

Circuitry in the power amp stage constantly monitors the internal temperature. In the event of overheating(caused, for example, by blockage of the vents), the VS 250 will automatically shut down and thereby prevent any damage to itself.

Inputs

Each channel of the VS 250 has two parallel inputs. The LINE OUTS of a guitar preamp (or effect unit) are to be connected here, one to each channel. The purpose of the parallel inputs is. to allow for input bridging. You could, for example, connect a cable from the second, parallel input jack of one channel to another power amp; or from Channel A of the VS 250 to its own Channel B, thereby using the VS 250 as a 2x50-watt mono power amp.

VS 250 specifications

The Hughes & Kettner VS 250 is a versatile and powerful guitar amplifier head that has garnered attention for its remarkable performance and array of features. Designed to accommodate various musical styles and preferences, the VS 250 is particularly popular among guitarists who value both tone and flexibility in their sound.

At the heart of the VS 250 is its innovative tube technology. The amplifier features a unique combination of tube-driven circuitry and modern digital components, allowing it to deliver the warmth and character characteristic of traditional tube amplifiers while benefiting from the precision and functionality of modern technology. This blend ensures that guitarists experience rich harmonic overtones and dynamic response, producing a sound that is both responsive and expressive.

One of the main features of the Hughes & Kettner VS 250 is its impressive tonal flexibility. The amp includes multiple channels, each with its own distinct voice. Guitarists can easily switch between clean, crunch, and lead tones, allowing for seamless transitions during performances or studio sessions. The well-designed EQ section offers extensive control over bass, middle, and treble frequencies, enabling players to sculpt their preferred sound profile.

Additionally, the VS 250 incorporates built-in digital effects, including reverb and delay. These effects allow users to enhance their tone without the need for external pedals, streamlining the setup process. The intuitive user interface makes it easy for players to customize settings, ensuring they can dial in their desired sound quickly.

The amp also features a series of outputs, allowing for easy integration with various speaker cabinets. This adaptability makes the VS 250 suitable for different performance environments, from small gigs to larger venues. Furthermore, it's equipped with features for direct output, making it ideal for recording situations.

Durability is another hallmark of the Hughes & Kettner VS 250. Built with high-quality components and a rugged chassis, this amplifier is designed to withstand the rigors of life on the road. Its compact size also makes it a convenient choice for traveling musicians.

In summary, the Hughes & Kettner VS 250 combines modern technology with traditional tube warmth to create an amplifier that is both powerful and versatile. Its range of features, tonal flexibility, and built-in effects make it a compelling choice for guitarists looking to elevate their sound. Whether on stage or in the studio, the VS 250 stands out as a reliable partner for musical expression.