Pricing and availability
Average Price: $13,928
High-end/Boutique
$300
$801+
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Budget
Standard
High-end
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Description
The Marshall JTM45 MK IV Super Tremolo 2-Channel 45-Watt Guitar Amp Head is a testament to timeless British tone, bridging the gap between classic sound and modern functionality. This amplifier head is renowned for its rich, harmonic-rich sound that harkens back to the golden era of rock. It brings the vintage JTM45 character back to life with modern enhancements, offering musicians a versatile tool for both stage and studio.
Featuring two distinct channels, this amp head allows for seamless switching between clean, warm tones and powerful, overdriven sounds. The built-in tremolo effect adds a layer of depth and motion to your playing, perfect for creating immersive soundscapes. With 45 watts of power, it’s designed to deliver robust sound with the dynamic range that guitarists crave.
The JTM45 MK IV also incorporates a GZ34 valve rectifier for authentic sag and response, making it an ideal choice for purists seeking an organic, tube-driven experience. Whether you're playing blues, rock, or anything in between, this amp head offers the flexibility and reliability that Marshall is celebrated for.
Key Features:
- 45-watt all-tube amplifier head
- Two channels: clean and overdrive
- Built-in tremolo effect
- GZ34 valve rectifier for authentic tube sag
- Classic Marshall tone with modern enhancements
- Suitable for both stage and studio use
Product specs
| Brand | Marshall |
| Model | JTM45 MK IV Super Tremolo 2-Channel 45-Watt Guitar Amp Head |
| Year | 1965 - 1966 |
| Made In | United Kingdom |
| Categories | Guitar Heads |
| Built-In Effects | Built-In Effects |
| Color Family | Black |
| Direct Output | No Direct Output |
| Effects Loop | No Effects Loop |
| Electronics | Tube |
| Impedance | 16 ohms, 4 ohms, 8 ohms |
| Number of Channels | 2 Channels |
| Number of Inputs | 4 Inputs |
| Output Power (Watts) | 45 |
| Power Tube Type | KT66 |
| Reverb | None |
FAQs
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What type of power tubes does the Marshall JTM45 MK IV use?
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The Marshall JTM45 MK IV Super Tremolo uses KT66 power tubes, which contribute to its classic warm and rich sound.
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Is the Marshall JTM45 MK IV suitable for live performances?
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With 45 watts of power, the Marshall JTM45 MK IV is well-suited for live performances, offering enough volume to compete with a drummer in most gigging situations.
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Does the Marshall JTM45 MK IV have a built-in effects loop?
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No, the Marshall JTM45 MK IV Super Tremolo does not feature an effects loop, which is typical for vintage-style amplifiers.
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How many channels does the Marshall JTM45 MK IV offer?
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The Marshall JTM45 MK IV Super Tremolo features two channels, providing versatility for different tonal settings.
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What is the impedance range of the Marshall JTM45 MK IV?
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The Marshall JTM45 MK IV supports 16 ohms, 8 ohms, and 4 ohms impedance settings, allowing for flexible speaker cabinet compatibility.
Reviews
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Marshall JTM45 MK IV Super Tremolo 2-Channel 45-Watt Guitar Amp Head.
Use cases and applications
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The JTM45 is praised for its versatility in small venues, making it ideal for 20-30 watt settings, and performs well when paired with an attenuator.
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It's highlighted that old school Marshalls, including the JTM45, can transition from clean to crunch using the guitar's volume knob.
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The Orange Dual Terror is praised for delivering vintage '70s British crunch tones effectively.
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User experience
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Some owners have experienced issues with the JTM30's board frying due to horizontal tube layout, affecting its long-term reliability.
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The JTM45's circuit is highly regarded for its unique voice, offering a variation of the Fender Bassman circuit with different transformers and speakers.
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Multiple users report that even low-wattage Plexi models like the SV20 produce substantial volume, making them suitable for rock and blues genres with minimal adjustment.
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Mods and upgrades
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For achieving metal tones, it's recommended to boost the JTM45 with a distortion pedal, although it won't replicate an American Mesa style.
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A popular mod involves using an attenuator or installing a master volume to manage the high volume levels of both JTM45 and Plexi amps during gigs.
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PCB construction in both JTM45 and 1987x makes them harder to modify, especially for tasks like swapping bright caps, which requires lifting the board to access solder joints.
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Marshall Origin amps may require mods, such as the Headway mod, for authentic Marshall tones beyond aesthetics.
Source
Features and functionality
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The JTM45 is noted for its fat lows and clean/blues sound, distinguishing it from later Marshalls with more aggressive tones.
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The JTM45 is closer in sound to a Fender Bassman, while the 1987x offers more gain and a brighter tone, making it ideal for early '70s hard rock sound.
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The JTM45 is described as "squishy" compared to the tighter Plexi 50w, which delivers exceptional sound with an OD pedal but is notably loud.
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The Vintage Modern series amps have a dynamic range button that switches between modified Plexi and JCM800 sounds, though it causes a noticeable volume drop.
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Comparisons
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The JTM45 is compared to the Friedman Dirty Shirley, which offers a similar circuit but includes a master volume for more control over output.
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The JCM800 clone is favored for punk rock setups, offering a point-to-point wired alternative that fits well with a 4x12 cab for a rich stage presence.
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The Boss Katana is mentioned as an alternative for achieving JTM tones through digital modeling.
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The Orange Rocker Terror 15 is noted for achieving a clean JTM45-like sound when cranked.
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Based on 0 Reviews and 0 Ratings
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