Prodigy transformer specs
- Thread starter 18000rpm
- Start date
Help Support MartinLogan Audio Owners Forum:
Are there any markings on the transformers themselves?
Have you tried emailing Ron at Martin Logan? He might be able to help.
Are the panels relatively new and having this issue? My old original Prodigy panels had a noticeable difference in sound output, I think it was about 5 dB. Once I got new panels the problem went away. Now the setting on my receiver has a difference of only .5 dB when set by Audyssey, and I think that's just the nature of my room.
It's a common problem for older panels I believe.
It's a common problem for older panels I believe.
I believe Mike mentioned he had new panels in another thread related to this issue.
ok. Thats too bad if its true. So far speakers are ok and they were manufactured in 2000. The panels are new of course.
Do you think it was a gradual thing where the output dropped slowly over time or was it more of an overnight thing?
Im scared this could happen to me. I'll be watching this thread. Thank you.
I was thinking it was, Mike, aka - GW1800
- Joined
- Apr 15, 2023
- Messages
- 38
- Reaction score
- 17
Hello to all. My name is Tom. I have owned Monolith iii's, Sequel 2's, Quests, Odyssey's and Ascent i. My current speakers are Prodigy's and I have a similar problem. I did order a set of new panels since they are over twenty years old. Brian at ML SERVICE sent me these files for troubleshooting. Hope this can help anyone.
Cool, nice to have those documents. Do you know the bias voltage for the Prodigy?
Is one of your Prodigy speakers having the same problem ie. the panel has much lower volume than the other? One of mine is 6-12dB lower than the other (starts above 250Hz which is the crossover point for the panel).
- Joined
- Apr 15, 2023
- Messages
- 38
- Reaction score
- 17
My one panel is about 12db's down. I decided to change panels because of age. I have not done any measuring yet. I did wash the panels yesterday and the are drying as we speak. I also soldered two panel connections. I will post the process for both procedures in a day or so with results. I am going to swap the top half of the speaker assembly to see if the bad panel follows the dB loss.
Tosh
Well-known member
First I would suspect the transformer on the PS board. Since you have one working side, you should be able to compare.
Many years ago one of mine went flaky and gave intermittent low levels:
https://www.diyaudio.com/community/...tent-bias-supply-problem.210168/#post-2973125
Many years ago one of mine went flaky and gave intermittent low levels:
https://www.diyaudio.com/community/...tent-bias-supply-problem.210168/#post-2973125
Attachments
Do you happen to have docs specific to those 2 models?
- Joined
- Apr 15, 2023
- Messages
- 38
- Reaction score
- 17
Hello JonFo, sorry, no I do not.
Tosh
Well-known member
My recommendation was based on your previous post, so you should clarify more.
I actually have 3 PS boards. One from the "good" speaker, one from the problem speaker, and a spare I bought new from ML 4 years back. All 3 of them show the same problem when placed in the problem speaker so that is unlikely to be the issue.
