Marshall Amplification 1923C Power Switch, Standby Switch, Deep Switch, Presence Control, Gain

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ENGLISH

1. Power Switch

This is the On/Off switch for the mains electric power to the amplifier.

Note: Please ensure the amplifier is switched off and unplugged from the mains electricity supply whenever it is moved!

2. Standby Switch

The Standby Switch is used in conjunction with the Power Switch (1) to ‘warm up’ the amplifier before use and to prolong the life of the valves. When powering up the amplifier always engage the Power Switch (1) first, leaving the Standby switch in the ‘OFF’ position. This enables the heater voltage, allowing the valves to come up to their correct operating temperature. After approximately two minutes the valves will have reached their correct operating temperature and the Standby Switch can be engaged, enabling the HT. In order to prolong valve life, the Standby Switch alone should also be used to turn the amplifier on and off during breaks in a performance. Also, when switching the amplifier off, always disengage the Standby Switch prior to the main Power Switch.

3. Deep Switch

The Deep Switch adds a tuned or resonant bass boost to your sound, increasing bottom end thud, without making your tone woolly around the all important low end.

4. Presence Control

Adds higher frequencies to the guitar tone, creating crispness and bite. Turning this up will make the sound more cutting and in your face.

5. Treble Control

Controls the high frequencies of the guitar tone, making your guitar sound brighter when increased.

6. Middle Control

Dictates the middle register of the amplifier. Turning this up will make your guitar sound fatter. Conversely reducing the amount of middle in your tone will result in a sharper and thinner guitar sound for the classic “scooped” tone.

7. Bass Control

Controls the amount of low frequencies or bottom end in your tone.

8. Tone Shift

The Tone Shift Switch reconfigures the tone network components to give a new dimension to passive tone shaping. With the switch selected to the ‘in’ position and the Middle Control (item

6)turned down the result is a scooped mid sound ideal for certain classic metal styles.

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Reverb

9. Channel B

Controls the reverb level on Channel B.

10. Channel A

Controls the reverb level on Channel A.

Ultra Gain / Channel B

11. Volume

Governs the volume level of Channel B.

12. Lead 1 / Lead 2 Switch

The Channel B features two modes. The first, Lead 1, gives an open high gain crunch, with traditional Marshall characteristics, similar to a hot-rodded JCM 800 2203 master volume. The Lead 2 mode however gives a mid-boosted tone coupled with even higher gain possibilities.

13. Gain

Controls the gain level for Channel B. As the amount of gain increases so will the distortion level in your sound.

14. LED

Indicates when Channel B has been selected.

15. Channel Switch

Selects Channel A or Channel B.

16. LED

Indicates when Channel A has been selected.

Classic Gain / Channel A

17. Volume

Governs the volume level of Channel A

18. Clean / Crunch

As with Channel B, Channel A features two modes. The first, Clean, is reminiscent of an early 1959 Plexi Super Lead head. Depending on Gain settings (item 19) this mode will take you from clean to a controlled Plexi style crunch. Crunch will take you up to a JCM 800 2203 style grind.

19. Gain

Controls the gain level for Channel A. As the amount of gain increases so will the distortion level in your tone.

20. Input Jack Socket

This high impedance input is where you plug your guitar into the amp. You must use a screened (shielded) guitar cable. Never use an unscreened (unshielded) speaker cable because you will find it very noisy to the point of annoyance. The input to any guitar amplifier is a very sensitive part of the signal path and is therefore susceptible to air born radio interference, hence the need for a screened guitar cable. This screened cable should preferably be of good quality. If you are in any doubt regarding this, your Marshall dealer will be more than happy to help, advise and supply you.

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Contents Page From the Chairman Ultra Gain / Channel B Volume Power SwitchStandby Switch Deep SwitchReturn Footswitch ChannelReverb Footswitch Effects Loop Send

1923C, 1923 specifications

Marshall Amplification has been a cornerstone of the music industry since its inception in 1962, known especially for its electric guitar amplifiers. However, the brand's evolution and its groundbreaking models, like the Marshall Amplification 1923 and 1923C, have drawn attention in recent years. These amplifiers embody both rich heritage and modern technological advancements, providing musicians with tools that enhance their sound.

The Marshall 1923 is a dual-channel guitar amplifier that layers classic Marshall tones with contemporary features. This model includes a unique power scaling feature, allowing musicians to achieve cranked-up tones at manageable volume levels. This is particularly beneficial for home use or small venues where overwhelming sound levels are impractical, ensuring that the warm characteristics of tube-driven sound can be accessed without compromise.

One of the key highlights of the Marshall 1923 is its versatile tone-shaping capabilities. It features an EQ section that includes treble, mid, and bass controls, which offer a wide range of sonic possibilities. Whether a guitarist seeks a rich, creamy sustain for solos or a sharp, biting tone for rhythm parts, the 1923 can accommodate diverse musical styles.

Similarly, the 1923C model amplifies the key features of the 1923 but includes additional functionalities tailored for more extensive live performance settings. The 1923C is equipped with built-in effects loops, allowing guitarists to integrate their favorite pedals seamlessly. This model also boasts a higher wattage output, providing more headroom and dynamic range for those explosive moments during a live set.

Both models feature rugged construction to endure the rigors of touring and performance, with high-quality components that ensure durability. The classic Marshall aesthetic—a black vinyl covering with distinctive gold piping—exudes a timeless appeal that stands out on stage and in the studio.

The integration of modern technologies with the traditional craftsmanship of Marshall amplifiers has made the 1923 and 1923C appealing to guitarists who wish to maintain a connection to the iconic sounds of rock while leveraging today's advancements for improved playability and versatility. Whether in the rehearsal space, studio, or on the main stage, these amplifiers continue to inspire creativity and sound excellence among musicians worldwide.