Gear Hunter
Marshall - JCM900 4501
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Description
The Marshall JCM900 4501 is a 50-watt, 1x12" all-tube combo amplifier produced in the United Kingdom during the 1990s (roughly 1990-1998). It is part of the High Gain Dual Reverb series, designed to offer more distortion than the earlier JCM800, making it a popular choice for '90s rock, punk, and metal. The 4501 acts as a portable, self-contained version of the 4500 50-watt head, providing a versatile, high-gain, two-channel platform.
Key Features and Description:
Two-Channel Design: Offers two independent channels (Channel A/Clean to Crunch, Channel B/Distortion) with separate gain and master volume controls, allowing for quick switching between rhythm and lead tones.
Dual Reverb: Includes spring reverb that can be adjusted independently for both channels.
High Gain Capabilities: Known for its "modern" 90s sound, it offers higher gain than previous models, suitable for hard rock and metal.
Power Reduction: Features a Pentode/Triode switch on the back panel, allowing the player to reduce the output power from 50 watts to 25 watts for easier saturation at lower volumes.
Effects Loop: Features a series effects loop for integrating pedals and rack gear.
Rugged Construction: Built in the UK with a birch-ply cabinet, black vinyl covering, and gold control panel.
Specifications:
Model: 4501 (50W Hi Gain Dual Reverb 1x12 Combo)
Output Power: 50 Watts (switchable to 25W)
Tubes: 3 x ECC83 (12AX7) in the preamp, 2 x EL34 (or sometimes 5881) in the power amp
Speaker: 1 x 12" Celestion G12T-75 (16 Ohms)
Channels: 2 (Dual Reverb)
Controls: Channel A (Gain, Master), Channel B (Lead Gain, Master), Reverb x2, Treble, Middle, Bass, Presence
Outputs: Speaker outputs (16Ω / 8Ω / 4Ω load options)
Weight: Approximately 21.5 kg (47.4 lbs)
Included Features: Valve failure LED indicator, Direct Line Out, Recording Compensated Output
Sound and Performance:
The JCM900 4501 is often characterized by its "sharp" and "aggressive" high-end, making it cut through in a band mix. While the JCM900 series uses diode clipping for its distortion rather than solely relying on tubes for gain like the JCM800, it remains highly regarded for its versatile, "functional" rock sound. It is capable of both sparkling clean sounds on Channel A and heavy, sustained, "saturated" screams on Channel
