Celestion G12H-150 Redback 8 Ohms
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What you need to know
What you need to know
- Colossal power of 150 W to handle a 100 W tube head in a 1x12 cabinet without flinching.
- Greenback/Creamback tonal signature with tight lows, detailed mids, and more relaxed highs.
- High sensitivity (100 dB) offering projection, headroom, and dynamics both on stage and in the studio.
- Robust design: heavy G12 ceramic magnet, 2 voice coil, and steel frame for maximum reliability.
Manufacturer Information
Celestion
https://www.celestion.com
info@celestion.com
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Safety manager:
Algam SAS
Email: contact@algam.net
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A super Greenback in the Classic Celestion series
Designed in response to the demand for increasingly powerful amps, the G12H-150 Redback expands the Classic series by capturing the character of a Greenback/Creamback while pushing power capacity further. It retains the Celestion DNA while allowing you to play very loud without sacrificing balance or musicality.
Who is it for and what are its uses?
Ideal for guitarists who want to reduce the size of their cabinet while maintaining depth, or for those seeking a 1x12 capable of keeping up with a 100 W head. Rock, hard rock, high-gain, or punchy clean tones: the Redback delivers a solid, clear, and controlled foundation, whatever the saturation level.
What the Redback changes in your sound
Tonal Response
The Redback offers tight and controlled lows that hold tuning, richly detailed mids that cut through the mix, and softer highs that avoid harshness at high volume. This results in exemplary playability and natural projection.
Reliability-oriented design
With its 2 voice coil and the heaviest G12 magnet, this 12 speaker in a steel frame is built to withstand the assaults of a pushed-to-the-limit amp while remaining responsive. Its 100 dB sensitivity maximizes efficiency, and its 150 W power rating provides ample headroom before compression.
Technical specifications
| Cabinet impedance (Ω) | 8 Ω | Magnet | Ceramic |
| Speaker diameter | 12" | Chassis | steel |
| Sensitivity | 100 dB | Coil diameter | 2 " |
| Frequency response - start | 70 Hz | Depth | 138 mm |
| Frequency response - end | 5 kHz | Power output | 150 W |
| Category | guitar amp speaker | Weight | 4.7 kg |
| Diameter | 12 inches | Voice coil diameter | 2 inches |
| Frame | steel | Power handling | 150 W |
| Impedance | 8 ohms | Frequency response | 70 Hz - 5 kHz |
Questions frequently asked
Can the Celestion G12H-150 Redback 8 Ohms handle a 100 W amplifier head?
With a rated power of 150 W at 8 Ω, this speaker is designed for a 1x12 cabinet paired with a 100 W head. This provides a power margin before compression occurs.
Which impedance should be chosen for the Redback?
This version has an impedance of 8 Ω. The speaker’s impedance must match the amplifier’s output or the cabinet wiring.
What tone does this Celestion 12-inch speaker provide?
The frequency response from 70 Hz to 5 kHz delivers tight lows and detailed mids. The highs are described as smoother at high volume, with a sensitivity of 100 dB for effective projection.
Is the Redback suitable for rock and high-gain sounds?
Its 150 W capacity and ceramic magnet are suited for driven amps. It fits rock, hard rock, and high-gain styles while remaining usable for punchy clean tones.
What is the weight and construction type of the G12H-150 Redback?
The steel frame and ceramic magnet bring the total weight to 4.7 kg. The voice coil has a diameter of 2 inches.



