P Spice parameter for MC cartridges like Lyra and Audio Technica? - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 20th November 2009, 09:10 AM   #1
diyAudio Member
tiefbassuebertr's Avatar
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default P Spice parameter for MC cartridges like Lyra and Audio Technica?

to develope by p-spice simulation nearly perfect head amps for low impedance moving coil cartridges, a modelling is actually necessary.

Unfortunately most engineers design from existing experience without any computer aided design. This is for me the main reason, why permanent very large audible differences by comparing of RIAA phono preamplifier are to observe, even by very expensive devices.

I have heard and read about great parasitic influences by very low output moving coil cartridges e. g. by the Lyra Dorian. See frequency response about
Lyra Dorian phono cartridge (English)
between 4 KHz und 18 KHz 7 db difference (!!!)

For me it is perfectly clear, that there are no possibility to compensate only with an appropriate load resistance. An equalizing is necessary for neutral and uncolored sound. CAD based no problem, but without CAD a very big problem.

Why there are no exactly CAD models for MC cartridges, even by the most expensive of the world?

Last edited by tiefbassuebertr; 20th November 2009 at 09:18 AM.
  Reply With Quote
Old 20th November 2009, 09:20 AM   #2
h_a is offline h_a  Europe
diyAudio Member
h_a's Avatar
Join Date: Sep 2006
Location: Graz, Austria
Spice modeling of MM-cartridges is regularly done as coil resistance+inductance and manufacturer's recommended loading capacitance is usually known. What is not known, completely ignored and therefore what makes this simple Spice simulations worthless is the mechanical part of the cartridge that is not taken into account. It's an oscillating mechanical system with a large resonance and to ignore the most vital part can only give poor results.

Modeling the mechanical part may be done by deriving an equivalent electromechanical model from the frequency response, measured for the cartridge in question.

Not done in 5 minutes, though.

Have fun, Hannes
  Reply With Quote
Old 10th September 2016, 12:31 PM   #3
rumors is offline rumors  Italy
diyAudio Member
Join Date: Aug 2003
To adjust the frequency response you can use trimmer instead of R riaa network
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Audio Technica AT30E bremen nacht Analogue Source 39 3rd February 2013 04:38 AM
Lyra Argo vs Audio Technica AT33ANV (AT 33 ANV, AT33, AT 33ANV) tiefbassuebertr Analogue Source 4 23rd February 2010 08:36 PM
Analyzer for verify of p-spice (Pspice) parameter - which PC Measurement System? tiefbassuebertr Software Tools 1 20th October 2009 06:29 AM
audio technica cartridges camotecue Analogue Source 8 3rd August 2008 10:56 PM
audio technica AT155lc jaudio Analogue Source 2 27th May 2006 09:23 PM

New To Site? Need Help?

All times are GMT. The time now is 09:21 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2