Detail 01
Single channel
All gain and tonal changes are made within one amp channel.
Product detailSKU #1500000452346
MarshallJCM800 Modified 100W Guitar Amp Head
1/8
Independent shopping perspective
The Korena take
Marshall’s JCM800 Modified is a 100W, single-channel tube head built around the JCM800 2203 concept with added switching for sound shaping. A gain boost expands the available drive range, mid boost changes the midrange emphasis, and the Tight switch cuts low frequencies for a more defined response. It uses three ECC83 preamp tubes and four EL34 power tubes, has High- and Low-sensitivity inputs, a series effects loop, and 4- and 16-ohm speaker outputs. It is made in Bletchley, England.
Strong match
Who this is for
- Players who want a single-channel tube head with selectable gain, midrange, and low-frequency shaping.
- Stage or studio rigs using High- and Low-sensitivity instrument inputs and a series effects loop.
- Guitar setups matched to the head’s listed 4-ohm or 16-ohm speaker outputs.
Consider the trade-offs
When to look elsewhere
- Players needing multiple amp channels.
- Speaker connections other than the listed 4-ohm and 16-ohm outputs.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Gain boost, mid-boost, and Tight switches
These switches add gain, alter midrange emphasis, and cut low frequencies respectively.
Detail 03
3 x ECC83 preamp tubes; 4 x EL34 power tubes
These are the tube complements specified for the preamp and power section.
Detail 04
High- and Low-sensitivity inputs
Two 1/4 in instrument inputs are available with different sensitivity settings.
Detail 05
Series effects loop
The head provides a series loop for routing external effects.
Detail 06
4- and 16-ohm speaker outputs
Use one of the listed speaker-output impedances.
Final check
Know before you order
- 01The head has one channel.
- 02Use the listed 4-ohm or 16-ohm speaker outputs.
- 03It has two 1/4 in instrument inputs: High and Low sensitivity.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01How many channels does the JCM800 Modified have?
It has one channel.
02What switches shape the sound?
It has gain boost, mid-boost, and Tight switches. The Tight switch cuts low frequencies.
03What tubes does it use?
It uses three ECC83 preamp tubes and four EL34 power tubes.
04Where is it made?
It is made in Bletchley, England.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsSound
- Effects Loop
- Series
1 detailsPickups & controls
- Preamp Tubes
- 3 x ECC83
2 detailsBody & build
- Country of Origin
- England (Bletchley)
- Type
- Tube amp head
4 detailsConnections & power
- Outputs
- Speaker outputs (4, and 16 ohms)
- Inputs
- 2 x 1/4 inch instrument inputs (High and Low sensitivity)
- Output Power
- 100 watts
- Power Tubes
- 4 x EL34
1 detailsOther
- Channels
- 1
