Metropolis 15-Watts 1×12" Guitar Combo with Reverb by Bogner.

The Bogner Metropolis 1x12 Combo Amp was built in the late 1990s as a classic AC style, 15 watt, class A tube amplifer with EL84 tubes.
The Metropolis was discontinued in early 2014.
A single channel Class A tube amp, available in combo and head form, in either 15 or 30 watt models.
The 'tell' for the power rating is the speaker - the 30 watt 1x12 combos have speakers rated above 30 watts !
There was also a 2x12 combo, and this is 30 watts with a pair of Celestion 25 watt speakers.
Added to the AC-style circuitry is a rotary six-position 'Schizo' tone gain structure switch. Reverb

Specs:

Amplifier Type:
Tube (Valve) Amplifier

Preamp Tubes:
3 x 12AX7 (for preamp stage)

Power Tubes:
2 x EL34 (power stage)

Speakers:
1 x 12-inch speaker, typically equipped with a Celestion Vintage 30 or a similar high-quality speaker for tight bass and smooth midrange.

Tone Controls:
Treble, Middle, Bass (3-band EQ)
Presence (controls high-frequency response)
Gain (controls input sensitivity)

Channels:
2 channels (Clean and Overdrive)
Clean Channel: Known for its crystalline, headroom-rich clean tone.
Overdrive Channel: Capable of everything from light crunch to high-gain saturation, with a very dynamic response to picking attack.

Effects Loop:
Series Effects Loop for integration with external effects.

Footswitch:
Typically comes with a 2-button footswitch for channel switching and activating the Overdrive mode.

Cabinet Construction:
Solid plywood construction for durability and excellent resonance.

Weight:
Approx. 40 lbs (18 kg), which is relatively lightweight for a high-powered tube amp combo.

Other Features:
Mid-boost for more aggressive tone shaping
Global Master Volume control for fine-tuning overall output level

Sound Characteristics:
The Bogner Metropolis 1×12 Combo is known for its creamy overdrive, smooth yet cutting high end, and exceptional note clarity in both clean and distorted settings.
It’s very versatile, able to handle everything from clean, bell-like tones to heavy, saturated rock sounds.
The combination of the EL34 power tubes and the Celestion Vintage 30 speaker gives it a British-flavored tone with lots of warmth and punch.

Product specs