Welcome To the Hoffman Amplifiers Forum

September 07, 2025, 09:40:09 am
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Low power Musing 40 with parallel/cascade idea  (Read 16547 times)

0 Members and 1 Guest are viewing this topic.

Offline dwinstonwood

  • Level 3
  • ***
  • Posts: 1217
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #100 on: August 12, 2021, 04:51:36 pm »
Thank you!

Offline dwinstonwood

  • Level 3
  • ***
  • Posts: 1217
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #101 on: August 14, 2021, 02:26:00 pm »
I had some laserable acrylic left over from my AC15, so I guess this one's going to have a blue faceplate, too. Here's a mockup drawing.

I've been playing it through the Celestion Creamback that's mounted in my AC15 cabinet. I haven't played it enough to really dial it in yet. But, it's a cool amp! :icon_biggrin:

Offline dwinstonwood

  • Level 3
  • ***
  • Posts: 1217
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #102 on: August 28, 2021, 09:54:58 pm »
So, I'm getting ready to order a Marshal head cabinet for this build (I have to budget and save for stuff).

It occurred to me that I should have used an OPT with multiple speaker Ohm secondary taps to allow for various speaker cabs other than 8 Ohm.

My current Deluxe Reverb OPT reflects 6,600 Ohms to the primary with an 8 Ohm speaker load.

It sounds really good as is, but I'm wondering if I might get less clean and less headroom if I went with an 8,500 Ohm 5E3 OPT (with multiple speaker taps) instead.

Contrary to logic and the interests of most gigging guitarists, I actually want the amp to distort sooner at the same volume.

Would the 5E3 OPT make a noticable difference at the same volume level in that regard?

Thanks. All advice and suggestions welcome.
« Last Edit: August 28, 2021, 09:59:40 pm by dwinstonwood »

Offline Glenn

  • Level 1
  • *
  • Posts: 68
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #103 on: August 29, 2021, 08:11:05 am »
Hi dwinstonwood. I had that exact same OT, it was a 6.6k 20 watt, with only the 8ohms tap on my Princeton reverb. I replaced it with a 18 watt 8.4k OT with multiple taps and even though I still am using the 8ohm the amp has more grunt now.
Good luck...Glenn

Offline dwinstonwood

  • Level 3
  • ***
  • Posts: 1217
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #104 on: August 29, 2021, 01:32:02 pm »
Thanks Glenn! That's what I was suspecting. Good to know. I'll look at one of those 18w OPT's. You can never have too many transformers.  :icon_biggrin:

It looks like the Hammond 1750PA is a good, inexpensive choice:
https://www.hammfg.com/part/1750PA
« Last Edit: August 29, 2021, 02:48:03 pm by dwinstonwood »

Offline Glenn

  • Level 1
  • *
  • Posts: 68
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #105 on: August 29, 2021, 03:31:25 pm »
Yes, that’s the one I used... I still have one left that I might use on a 6y6 Express I’m interested in.

How do you like the 6l6 bassman, you and Sluckey designed?
I’m interested in that too. Does it break up before the cops come to the door?
Thanks...

Offline dwinstonwood

  • Level 3
  • ***
  • Posts: 1217
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #106 on: August 29, 2021, 08:27:17 pm »
Glenn, the Musing 40, as I called it, has beautiful clean tones, but it's really way too loud for the townhouse I live in. I can get it into overdrive with the gain pot, but just for a few minutes at a time. I couldn't get away with playing it that loud for extended periods.
Now, I'm using a WGS 12C/S which is a warm speaker with a very smooth top end. High notes are really clear, but without being so bright that it hurts (I ended up leaving off the Bright switch). The filtering (coupling cap choices) seems very balanced through the whole frequency range. It would probably be a good Jazz amp. I think it would really shine with a big archtop.

Offline Glenn

  • Level 1
  • *
  • Posts: 68
  • I love Tube amps
Hoffman Amps Forum image
Re: Low power Musing 40 with parallel/cascade idea
« Reply #107 on: August 30, 2021, 07:56:13 am »
Thanks for the explanation, cheers.

 


Choose a link from the
Hoffman Amplifiers parts catalog
Mobile Device
Catalog Link
Yard Sale
Discontinued
Misc. Hardware
What's New Board Building
 Parts
Amp trim
Handles
Lamps
Diodes
Hoffman Turret
 Boards
Channel
Switching
Resistors Fender Eyelet
 Boards
Screws/Nuts
Washers
Jacks/Plugs
Connectors
Misc Eyelet
Boards
Tools
Capacitors Custom Boards
Tubes
Valves
Pots
Knobs
Fuses/Cords Chassis
Tube
Sockets
Switches Wire
Cable


Handy Links
Tube Amp Library
Tube Amp
Schematics library
Design a custom Eyelet or
Turret Board
DIY Layout Creator
File analyzer program
DIY Layout Creator
File library
Transformer Wiring
Diagrams
Hoffmanamps
Facebook page
Hoffman Amplifiers
Discount Program


password