MADE IN ENGLAND
The original G12M of the 1960s was Celestion's first guitar speaker to use a ceramic magnet and paved the way for high power guitar amplifiers. The G12M uses a medium weight magnet to produce a sound that is smooth and warm but bright enough to hold its own against any rock backline. Known simply these days as the 'Greenback' the G12M's fabled 'brown tone' is characterized by a warm, controlled low-end, a rich vocal mid-range, and a delicate, detailed top end. Loaded into a 4x12 and driven hard, these speakers exude warm, crunchy chords and sweet searing single-notes.
Nominal Diameter: 12.0", 304.8 mm
Power Rated: 20 Wrms
Nominal Impedance: 8 ohms
Sensitivity: 96.0 db 1w/1m
Chassis Type: Pressed steel
Voice Coil Diameter: 1.75", 44.5 mm
Voice Coil Material: Round copper
Magnet Type: Ceramic
Magnet Weight: 35.0 oz, 990.0 grams
Freq. Response: 75.0 Hz-5.0 kHz
Resonance Frequency, Fs: 75 Hz
DC Resistance, Re: 6.57 ohms
Baffle Hole Diameter: 11.1", 283 mm
Overall Diameter: 12.2", 309 mm
Magnet Structure Diameter: 5.9", 150 mm
Mounting Slot Dimensions: 0.31", 7.9 mm
Mounting Slot PCD: 11.7", 297 mm
Number of Mounting Holes: 4
Overall Depth: 5.1", 130.0 mm
Net Weight: 7.9 lbs, 3.6 kg
Shipping Weight: 10.1 lbs, 4.59 kg
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The Celestion G12M Heritage (20 Watt) that I ordered from NextGen came with two of the main mounting screw holes elongated as if someone had used it before -- having to elongate the mounting screw holes to make it fit their situation -- but then returned it to NextGen. The only other scenario I can think of is that it came screwed-up like this to NextGen from Celestion. The speaker rattled at first because it wouldn't seat against the baffle properly because of these altered mounting screw holes. And it gave me trouble with the existing screw holes in my baffle.
Not a big deal to remount but I was pissed-off. But I really like this speaker. And it won't stop me from ordering again from NextGen -- this is my second purchase from NextGen and I wouldn't go any where else. What ever speaker I need I know they have; and the shipping and service are 'above and beyond the call of duty'. Plus, if you call you can actually talk to a real person who has all the info you'll ever need before you pull the trigger.
About this speaker: I play old Chicago Blues and Blues Rock with a Gibson ES 339 Studio Memphis thru a Hughes and Kettner Deluxe 20 (Watt) amp with closed back 1X12. The 50 Watt speaker I had was 'flubby' so I tried to match speaker wattage with the amp and that worked for me. I haven't used this in a huge venue yet (so someone else will have to do the max power review) but, as far as home studio and small gig/showcase goes this is a dream speaker for 'warm bite'. It growls at low volume. I used a 25 Watt (Chinese) Greenback for just a weekend before I got the G12M Heritage but I like the Heritage.
It's really hard to pick the right speaker for you based on youtube sound clips and articles. Most goodhearted reviewers neglect to mention what style of music they play -- what works for a Metal player might be the worst choice for Rock. Calling NextGen before I purchased help me narrow down my search considerably -- Good Luck.