Ruby 12 - Loudspeaker Celestion - Free user manual and instructions
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| Product Type | Loudspeaker |
| Brand | Celestion |
| Model | Ruby 12 |
| Driver Size | 12 inches (30.5 cm) |
| Impedance | 8 Ohms |
| Power Handling (RMS) | 75 Watts |
| Frequency Response | 70 Hz - 5 kHz |
| Sensitivity | 97 dB (1W/1m) |
| Magnet Type | Ceramic |
| Cone Material | Paper |
| Voice Coil Diameter | 1.75 inches |
| Chassis Material | Pressed steel |
| Weight | 3.6 kg (8 lbs) |
| Dimensions (Diameter x Depth) | 12 x 5.5 inches |
| Mounting Style | Front or rear mount |
| Connector Type | 6.3mm spade terminals |
| Recommended Cabinet Volume | 20-60 liters |
| Usage | Electric guitar amplifiers |
| Maintenance | Clean with dry cloth; avoid moisture |
| Repairability | Replacement parts available from Celestion |
| Safety | Operate within rated power; proper enclosure |
Frequently Asked Questions - Ruby 12 Celestion
What is the impedance of the Celestion Ruby 12?
The impedance is 8 Ohms, making it compatible with most guitar amplifiers designed for standard 8-ohm speaker loads.
How much power can this speaker handle?
The Ruby 12 handles up to 75 Watts RMS, ideal for practice amps and moderate-stage performance without risk of damage.
What type of guitar music is it suitable for?
Its warm tone and smooth response make it versatile for blues, classic rock, and jazz, clean or overdriven.
How do I clean the speaker?
Use a soft dry cloth to gently wipe the frame and cone. Avoid moisture, solvents, and compressed air, which can damage the cone.
Can I use this speaker in a combo amp?
Yes, the Ruby 12 is designed for closed-back and open-back enclosures, commonly found in combo guitar amps.
What is the sensitivity of the Ruby 12?
It has a sensitivity of 97 dB (1W/1m), meaning it produces high output even with low wattage, perfect for power-tube overdrive.
Does it come with mounting hardware?
Mounting screws are not included, but the speaker features standard 6.3mm spade terminals and a frame compatible with common 12-inch speaker screws.
How do I break in a new speaker?
Play music or chords at moderate volume for about 2-4 hours. This loosens the cone surround, smoothing the frequency response and preventing stiffness.
What is the frequency response?
The speaker responds from 70 Hz to 5 kHz, ideal for guitar frequencies without excessive hiss or muddiness.
Is it compatible with tube amplifiers?
Yes, an 8-ohm load is standard for most tube amps. Ensure your amplifier's output transformer is set to 8 ohms for optimal performance and safety.
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USER MANUAL Ruby 12 Celestion
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Product information
Brand : Celestion
Model : Ruby 12
Category : Loudspeaker