Blog tagged as vinyl

Tools for Modifying the Muffsy Phono Preamp

Several people have been in touch lately with questions on how to modify the PCB into something it isn't right now. Popular requests are balanced inputs and/or balanced outputs, and DC servo on the outputs.

16.10.18 03:08 PM - Comment(s)
Vinyl-rips on YouTube, Using the Muffsy Phono Preamp

YouTube user Blake G has posted a couple of vinyl-rips using the Muffsy Phono Preamp onto the video site. Although YouTube probably alters the bitrate, you can still get an idea on how the Muffsy Phono Preamp performs in his setup. His setup, btw, is:

    • Turntable: Sony PS-X500
    • Cartridge: Empire 999ve...
31.08.17 02:48 PM - Comment(s)
Modify the Muffsy MC Head Amp's Input Impedance


Since only one extra resistor value is needed to get the higher impedances, it's been added to the kit. Now you can choose between these two options.

The input impedances on the Muffsy MC Head Amp can be changed to your liking. To help you find the right values, here's a nifty input impedance ...

26.09.16 04:01 PM - Comment(s)

After a lot of testing, ordering of components, assembling kits, more testing and writing build instructions, the Muffsy MC Head Amp kit has finally launched!

If you're looking for a way to use low output MC cartridges with your Muffsy Phono Preamp, or any other MM phono stage, look no further! 
Get i...

21.09.16 12:36 PM - Comment(s)

It's done, it's built, it's the first of its kind, it's plugged in, it sings! 

No hiccups, no artifacts, it just works. It's playing the 40th anniversary "Crime of the Century" by Supertramp right now.

Sweet :)

This does mean that, with some effort, the kit will be ready in about two weeks. T...

18.09.16 11:14 PM - Comment(s)

That's right, the MC Head Amp made it to the front page of HACKADAY, which is a great honor!

Unfortunately, there's some confusion in the article and in the comments that I would like to address here.

18.09.16 01:07 PM - Comment(s)
Muffsy MC Head Amp - Specifications

Wondering how the Muffsy MC Head Amp measures? Look below for the numbers.

  • Topology: Dual mono
  • Gain: 24.6 dB
    • 0.3 mV input = 5 mV output
    • 0.5 mV input = 8.5 mV output 
  • Input impedance: 47 - 100 ohms, in four steps
  • THD: < 0.1 % *)
  • THD+N: < 0.6 % *)
  • SNR:  71.8 dB, referenced to 0.5 mV input @ 1 kHz
  • Frequen...
12.09.16 10:33 AM - Comment(s)
Why Would You Want an MC Head Amp?

You may have noticed that the Muffsy MC Head Amp is on its way. UPDATE: It's already here!

Here's why you might want one for yourself.

07.09.16 03:54 PM - Comment(s)

While we're waiting for the Muffsy MC Head Amp, here's a sneak peek of the new back panel for the B0905 cabinet.

There are a lot of considerations to make when dealing with the very low output from an MC cartridge. Noise and interference should be avoided in all parts of the design, and that's why th...

07.09.16 10:04 AM - Comment(s)