Combo amplifiers have been a staple for many guitarists due to their convenience and integrated design, which combines the amplifier head and speaker(s) in a single unit. However, some musicians wonder if they can use a combo amp as a cabinet by bypassing the amplifier section. In this article, we’ll delve into the possibilities and limitations of using a combo amp as a cabinet and explore the advantages and considerations involved in this practice.
Understanding Combo Amplifiers
Combo amplifiers, or “combos,” are amplifiers that house both the amplifier head (preamp and power amp sections) and one or more speakers in a single enclosure. They come in various sizes and configurations, such as 1×12, 2×12, or 4×12, and offer different tonal characteristics based on the amp models and speaker types they incorporate.
Using a Combo Amp as a Cabinet: The Pros
- Cost-Effective Solution: If you already own a combo amp and want to expand your setup, using it as a cabinet can save you money compared to purchasing a separate speaker cabinet.
- Portability: Combo amps are designed with portability in mind. Utilizing one as a cabinet can maintain the convenience of a compact, all-in-one setup while extending your tonal options.
- Tonal Compatibility: Using a combo amp as a cabinet allows you to pair your amplifier head with a speaker specifically designed to complement its tonal characteristics, potentially resulting in a harmonious combination.
- Space Efficiency: In smaller practice spaces or home studios, combo amps can serve a dual purpose, conserving floor space while providing various tonal options.
Using a Combo Amp as a Cabinet: The Cons and Considerations
- Amplifier Bypass: To use a combo amp as a cabinet, you must bypass the amp’s preamp and power amp sections, which can be a technically challenging process, depending on the amp’s design. It may require modifications or special cables.
- Impedance Matching: Ensuring the correct impedance matching between your amplifier head and the combo amp’s speaker(s) is crucial. Mismatched impedances can damage your equipment.
- Sound Quality: Combo amps often have different speaker configurations and types than standalone cabinets, which can result in tonal differences. You may not achieve the exact sound you desire.
- Modifications: Modifying your combo amp for use as a cabinet may void warranties and could affect the resale value of the amp.
- Limited Tonal Range: Combo amp speakers are typically voiced to work well with the built-in amplifier. Using them as a cabinet might limit your tonal options compared to a dedicated speaker cabinet.
How to Use a Combo Amp as a Cabinet Safely and Effectively
If you decide to use your combo amp as a cabinet, here are some steps to consider:
- Bypassing the Amplifier: Consult the amp’s manual or seek guidance from a qualified technician to safely bypass the preamp and power amp sections.
- Impedance Matching: Ensure that the combo amp’s speaker(s) match the impedance rating of your amplifier head. Using an impedance-matching calculator can help.
- Tonal Adjustments: Be prepared for potential tonal differences and experiment with your amplifier head’s settings to find the right balance.
- Maintenance: Regularly check the connections and speaker integrity to avoid any issues with your setup.
Using a combo amp as a cabinet can be a cost-effective and space-saving solution for expanding your guitar setup. However, it comes with technical challenges and potential tonal differences. Careful consideration of your equipment, the necessary modifications, and proper impedance matching are essential to use a combo amp as a cabinet safely and effectively. Ultimately, the decision should align with your specific musical goals and preferences.
