Very nice example of a Harmony H303A guitar amp from the early 60's.

This is a great sounding little amp that is in super condition for it's age.

The Harmony H303A is a compact, low-wattage vintage tube combo amplifier manufactured in the 1950s and 1960s. Known for its simple, stripped-down design, it is a favorite among home players and studio musicians seeking authentic vintage grit and natural tube overdrive.

Key Specs & Features

  • Power Output: Typically ranges between 3 to 8 watts depending on the exact year and revision.
  • Tube Complement: Features a three-tube configuration consisting of a 35W4 rectifier, 50C5 power tube, and 12AU6 preamp tube.
  • Speaker: Originally equipped with a 6-inch or 8-inch vintage Jensen speaker.
  • Controls: Extremely minimal. Features a single volume knob that doubles as the on/off switch.
  • Inputs: Includes 2 to 3 inputs that usually feed the same signal without variation.

Tone & Use Cases

  • Overdrive & Grit: If you are looking for clean headroom, this is not the amp for you. However, it truly shines at pushing early, smooth harmonic breakup and distortion.
  • Studio & Practice: Because it relies on low wattage, you can crank the volume for a dirty, overdriven tone at bedroom or recording levels.
  • Pedal Platform: It takes boost and overdrive pedals very well to enhance its natural tube compression.

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The Guitar Shop Phone Number 419-332-8788

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Closed Sunday, Monday, Tuesday.

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Since my shop is closed on Sunday, Monday and Tuesday, if you purchase the item late on a Saturday and want it fast, let me know am I will try to get it sent out on a Monday, if you don't mind, then I will get it shipped out when I get back in my shop on Wednesday. Thanks

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listed2 days ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more
Brand
Model
  • H303A
Categories
Year
  • 1960-1964
Made In
  • United States
Number of Inputs
  • 3 Inputs
Speaker Configuration
  • 1x8"
Electronics
  • Tube
Direct Output
  • No Direct Output
Power Tube Type
  • 50C5
Reverb
  • None
Number of Channels
  • 1 Channel
Output Power (Watts)
  • 3

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The Guitar Shop & Music Co. LLC

Fremont, OH, United States
Joined Reverb:2025

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