MASCO MA-25 1950's TUBE HARMONICA GUITAR 25 watt HEAD SERVICED!

JUNE CLEARANCE FINAL$

**Here at Gordy's Music in Ferndale, Michigan, we are so proud and grateful to receive the REVERB TOP 300 SELLERS Certificate for the second year in a row! A real honor. We want to start by thanking all of you, our customers, my partner and wife Marcia, top notch crew, and Reverb.com. We have quite a team and will strive to get this certificate year after year.**

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Here we have a 1950's Masco MA-25 tube head in ready to use condition. My amp technician of 40 plus years just went through and replaced the filter caps and added 2 new 7-4B pre-amp tubes to replace the weak microphonic ones. He converted one of the 2 input jacks to a more useable 1/4" female input to accept today's guitar and microphone cables. He also tested and cleaned all functions so the amp comes with a fresh clean bill of health. All cleaned and serviced up.

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The original Masco MA-25 tube amplifier is a vintage public address (PA) system head, and its specifications vary slightly depending on the exact year and model variation (e.g., MA-25N). The original unit was rated for 25 watts of power output. 

Core Specifications:

• Power Output: The amplifier provides a full 25 watts of "undistorted output" in its original design, operating in a Class AB-2 power stage.
• Tube Complement: The specific tubes can vary by production year and whether it's the original PA version or a later modification. Common configurations include:
• • (2) 6L6G power tubes
  • (1) 5U4 or 5U4GB rectifier tube
  • (1) 6SJ7 pentode and 6SC7 dual triode preamps
  • (1) 6SC7 phase inverter
  • Some models used (4) 7N7 tubes instead of the 6SJ7/6SC7 arrangement.
• Inputs: The original units typically feature four inputs: three for microphones and one for a phonograph, each with independent volume control. Many units available today have been modified with 1/4-inch jacks for guitar or harmonica use.
• Output Impedance: The output transformer is multi-tapped, offering options for 4, 8, 15, 125, 250, and 500 ohms.
• Controls: The amplifier generally includes individual controls for the four inputs, a master bass equalizer, and a master treble equalizer, in addition to a power switch.
• Frequency Response: The MA-25N model specifications list a frequency response of 50 to 15,000 CPS (Hz) with a tolerance of ±2 DB.
• Dimensions: A typical physical dimension for the amplifier chassis is 15 x 8 x 9 inches (W x H x D).
• Weight: The weight before packing is approximately 23 lbs. 

General Description:

The Masco MA-25, manufactured by the Mark Simpson Company starting around 1947, was originally designed as a robust public address system amplifier. It has gained popularity in vintage audio circles and among musicians for its durable point-to-point wiring and warm, "slightly gritty" tube-driven tone when converted for instrument use. Many second-hand units have had their capacitors and jacks updated to modernize them for safe and reliable use as instrument amplifiers especially for guitar and harmonica.

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Amp weighs 25 lbs.

Ships fast and insured

Shipping weight is 27 lbs.

Shipping box dimensions: 24"x16"x20"

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Shop at our Reverb Store for a bunch of vintage and other products at:

https://reverb.com/shop/gordys-music

IN BUSINESS for 40 YEARS!!

50 YEARS of VINTAGE EXPERIENCE!

MICHIGAN GUITAR SHOW PROMOTORS Since 1989!

Brick and mortar to the end!

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NOTE: Too cool. We just shipped very recently this summer a 1967 MapleGlo Rickenbacker 6-12 Converter 'comb' guitar to Billy Corigan of Smashing Pumpkins! We also then shipped a vintage 50 watt Marshall head to L.A. studio-touring guitarist extraodinaire, Michael Landau, and 2 vintage guitars to Jack White's organization down in Nashville just a few days before his 50th. birthday! mmm? Add 'The Kentucky Head Hunters' to the list, just sold Greg a cool little 50's Valco tube combo amp!

Gordy's Music has become a Detroit institution! Our shop was used as a filming location for a few films like "Miracle in Motor City" a Christmas movie on Lifetime (featuring Smoky Robinson). We've supplied gear for movies including "Bill & Ted Face The Music" with Keanu Reeves. We've got decades of celebrity customers, including recent visits from Beck, Eric Johnson, and we recently sold Billy Joel's bassist a cool Gibson SG he is in love with. One day a while back Andre 3000 and his group stopped in to browse as they were playing Masonic Temple that night and right after that we sold an old oil can Morley Wah Vibrato pedal to Credence Clearwater Revival's thee John Fogerty!

We are having and have had a lot of fun here at Gordy's Music! I was just remembering about 35 years ago a tour bus pulled up to our little shop, and who rolls right in and hangs out for an hour? Lenny Kravitz and his entire group, right about the same time I was selling many guitars to and chauffeuring around Dee Dee Ramone who had an apartment a block down from my house.