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Vintage 1947-1949 Gibson GA-25 Amplifier Excellent Condition RARE NO RESERVE For Sale


Vintage 1947-1949 Gibson GA-25 Amplifier Excellent Condition RARE NO RESERVE
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Vintage 1947-1949 Gibson GA-25 Amplifier Excellent Condition RARE NO RESERVE:
$1075.00

At top 40 guitarsour customers satisfaction is our firstconcern.All of our items have a 14 day return policy.If after 14 days you are notcompletelysatisfiedwith yourpurchase, please return it for a full refund....Peace be with you...
*all returned items must be in the same condition theywere at the time of sale.All original packing must be included.
#4718
Up forSale is aVintage 1947-1949 Gibson GA-25 Amplifier!
15W 1x12\" and 1x8\" Combo Amp! Made In USA!This is really cool. You are looking at a Vintage 1947-1949 Gibson GA-25 Amplifier. Not sure of the exact year. They were only built for 3 years. This amp is in pristine condition. Appears to be in mostly original condition other than a few caps, grounded cord, etc. (See picture #9).
Gibson built a very high quality product just after WW II. From the late 1940\'s to the mid 1950\'s was Gibson\'s Golden Age of Amp Design. Gibson felt it was their patriotic duty to hire veterans that had been engineers during the war. Consequently they had a lot of personnel that were over qualified but needed a job and they came up with some very advanced designs.This Amp sounds AWESOME! This low wattage amp has a great clean tone that breaks up early. You can drive this amp and make it sing! A real \"Tone Monster\" Does double Duty as a Guitar or Harmonica Amp. The 2-Offset Speakers really give a good clarity and Punch. Original 12\" and 8\" Jensen Alnicos.
From The Web:
An all new amp was released in late 1947, to replace the mid-priced BR-4. At $132.50, the GA-25 was in the same price range for the short time both were available, but it exuded a definite post-WWII design. The cabinet was noticeably wider than it was tall, and completely lacked ornamentation, other than the new company logo. This isn’t to say the amp was unsightly. Rather, it projected a sleek, mid-century modern image, with uninterrupted surfaces and two speaker openings, of different sizes. Nothin’ but a box covered in “…rich brown Keratol” with a handle on top and two holes for the sound to get out… simplicity in industrial design. On the backside, the panels covering the top third and bottom third exaggerated the stretched out lines of the new cabinet, offering protection to (but without impeding ventilation for) the tubes, which stood straight up from the bottom-mounted chassis. Even the input jacks, control knobs, pilot light, fuse and on/off switch were in a single, horizontal plane.

Using two Jensen speakers of different sizes (12″ and 8″) was a novel approach, offering a little better high-end than a single 12″, without sacrificing much in the bass frequencies. These new speakers were permanent-magnet Jensens instead of the field coils used on all previous Gibson amps. One lost benefit of the field coil was the smoothing action on the DC plate current (ahead of the filter caps), which was conveniently used to charge the electromagnet. Without running the pulsating DC through the windings of the field coil, the addition of a choke (inductor) to supplement the filter caps was necessitated (the choke is the little transformer-like device protruding from the bottom of most amp chassis and is basically one side of a transformer).

Just about everything else in the new circuit was different, too, starting with the inputs. Three instrument jacks were run into the 6SJ7 preamp tube formerly reserved for the mic input. A small difference in the value of the input resistors was now all that differentiated the mic input from the instrument inputs. Missing was the 6SL7 preamp tube that had added a second stage to the mic channel and made feasible a separate mic volume control. A single volume and a tone were now the only controls.

In the phase inverter section, the BR-4’s 6SN7 twin triode tube was replaced with a pair of 6J5 tubes, possibly so they wouldn’t have to call the GA-25 a five-tube model. The number of tubes used was often equated with quality, as seen in the BR-4’s original catalog description “6 tubes, two of which are dual purpose, providing the equivalent of 8 tube performance.” The GA-25 offered six-tube performance from six tubes, including the unchanged 5Y3. The twin 6V6 power tubes, however, yielded a “…full 15 watts” according to company literature and coupled to twin speakers, should have provided a louder amp.

GA-25


15W 1x12\" and 1x8\" Guitar Combo
Speakers: 1x12\" & 1x8\"
Inputs (instr. + mic.): 3+1
Channels: 1
Volume Controls: 1
Tone Controls: 1
Tremolo: No
Preamp Tubes: 1x6SJ7
Phase splitter Tubes: 2x6J5
Output Tubes: 2x6V6
Rectifier Tubes: 1x5Y3
Watts Output: 15

Rare and Collectable!
This Amp Sounds AWESOME! Has that Vintage Tone. In my opinion these Gibson amps sound much better than the Fender Tweeds of thatera for substantially less money.Gigging or Recording this amp will do it all. Our Amp Tech did aService on this Amp. You can see the replacedparts in picture #9.You will not have to spend any additional monies. Gig Ready on Arrival!Cosmetics:ExcellentCondition. Keep in mind that this is a 68+ year old vintage amp that has been used. Some scuffs, scratches and minor tears in the Keratol Print Finish.Dripping with \"Mojo\" This is the \"Real Deal\" Overall, good shape. Normal wear and tear.It is used. Not perfect. Look at the pictures closely. They will tell the story.Call the shop at 619-258-3957 with any questions.We are here to help!Top 40 guitars is a Veteran owned business.

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