The Marshall Hi Gain Dual Reverb amplifier was designed to provide two different, foot-switchable tones from a single chassis. Produced in several different configurations, the Dual Reverb was arguably the most popular amplifier in the JCM 900 series.

Model 4100

• Amplifer head only (requires separate speaker cabinet)
• 100 watts RMS
• Dimensions: 750 (W) x 310 (H) x 220 (D) mm
• Weight: 18.8 kg

Model 4101

• Combo Amp (amp + speaker)
• 100 watts RMS
• 1 x 12 Celestion G12-100 8 ohm speaker
• Dimensions: 500 (W) x 470 (H) x 290 (D) mm
• Weight: 23.9 kg

Model 4102

• Combo Amp (amp + speakers)
• 100 watts RMS
• 2 x 12 Celestion G12-175 16 ohm speakers
• Dimensions: 670 (W) x 520 (H) x 250 (D) mm
• Weight: 28 kg

Model 4500

• Amplifer head only (requires separate speaker cabinet)
• 50 watts RMS
• Dimensions: 750 (W) x 310 (H) x 220 (D) mm
• Weight: 17.4 kg

Model 4501

• Combo Amp (amp + speaker)
• 50 watts RMS
• 1 x 12 Celestion G12-75 8 ohm speaker
• Dimensions: 500 (W) x 470 (H) x 290 (D) mm
• Weight: 21.2 kg

Model 4502

• Combo Amp (amp + speakers)
• 50 watts RMS
• 2 x 12 Celestion G12-75 16 ohm speakers
• Dimensions: 670 (W) x 520 (H) x 250 (D) mm
• Weight: 26.6 kg