The Powerball offers independent master volumes and channel volumes, plus a built-in noise gate, enhancing versatility and practicality for gigging.

The Invader II offers a wide tonal palette, accommodating genres like 80s glam, power, and speed metal with its big, tight bottom end, suitable for palm-muted riffs.

The Invader features blue LEDs and is described as having "four amps in one," which some find excessive but versatile.

Shared EQ is not an issue for many users, who adapt by using EQ pedals for specific guitar types or as a boost.

The Powerball is noted for tighter sound and more versatility compared to the Fireball, with features like separate gain controls for clean and lead channels.

The Invader II is considered reliable and well-built, especially in Europe, and is often compared favorably to the EVH 5150 III regarding longevity.

The Invader's clean channel is praised but lacks reverb, making the Screamer preferable for genres like country that benefit from built-in reverb.

The Powerball's extra headroom can be beneficial for loud gigs, yet it maintains excellent sound quality even at bedroom levels.

The Powerball can be set to mimic the Fireball's lead channel sound but offers more control and flexibility in live settings.

The Invader II is praised for handling distorted sounds well, crucial for genres like Helloween and Gamma Ray without compromising on acceptable clean tones.

The Invader is seen as suitable for playing bands like Rammstein without additional pedals, underscoring its ability to capture heavy tones directly.

Owners report that Engl amps, including the Powerball, have excellent master volumes, ensuring clear sound at low volumes.

It’s observed that most of the Engl sound comes from the preamp, allowing high gain tones at lower volumes without relying on the power amp's saturation.

European users report easier access to ENGL amps, making the Invader II a more practical choice over some American-made competitors due to availability.

Owners appreciate the ability to achieve desired tones without reliance on external pedals, highlighting the amp's strong built-in tonal capabilities.

A used Engl Fireball 100 can be found for around $950, significantly lower than the new price of approximately $1800.