Planar Speaker Asylum

Welcome! Need support, you got it. Or share your ideas and experiences.

Return to Planar Speaker Asylum


Message Sort: Post Order or Asylum Reverse Threaded

Danny tackles the 3.7i

98.53.129.146

Posted on October 27, 2022 at 08:30:13
mraudio
Audiophile

Posts: 381
Location: Northern Colorado
Joined: November 4, 2006
Very informative.

https://www.youtube.com/watch?v=_bpDP0jxj4k&t=750s

 

Hide full thread outline!
    ...
RE: Danny tackles the 3.7i, posted on October 27, 2022 at 09:27:38
Davey
Audiophile

Posts: 2469
Joined: September 26, 2013
I don't think people appreciate how difficult it is to (properly) measure speakers like this.
Danny is out of his depth on this one, nor does he have the facility to do it.

BUT, he's got an expensive parts kit he'll sell you! :)

Dave.

 

RE: Danny tackles the 3.7i, posted on October 27, 2022 at 10:37:57
mraudio
Audiophile

Posts: 381
Location: Northern Colorado
Joined: November 4, 2006
I don't know. I learned a long time ago, not to poo poo anything until I actually hear it.

I was impressed with his presentation and knowledge.

I'd love to hear this mod!

 

RE: Danny tackles the 3.7i, posted on October 27, 2022 at 13:02:38
emailtim
Audiophile

Posts: 5090
Joined: July 2, 2017
There are too many reasons jumping out to imagine Magnepan would pre-wire their 3.7i's without XO parts, fuses and connection plates substituting tube-connectors to plug up to an external aftermarket DIY parts kit while maintaining factory warranty support without copious amounts of terms and conditions in place beforehand.

Using a 60 watt amp and then saying the 3.7i bass was anemic was another head scratcher.
.

2022/03/30 Historical Records CENSORED

 

RE: Danny tackles the 3.7i, posted on October 27, 2022 at 19:40:04
Davey
Audiophile

Posts: 2469
Joined: September 26, 2013
I have to hand it Danny though. He drives full-throttle with his business model and doesn't care who he impugns along the way. Nobody is off limits from criticism......either ignorant or informed.

I'm wondering about the person that offered up these brand new 3.7's to Danny. I don't understand the motivation there.

Oh well.

Dave.

 

RE: Danny tackles the 3.7i, posted on October 27, 2022 at 19:48:32
bluesy41
Audiophile

Posts: 129
Location: Seattle
Joined: February 20, 2018
I saw the video earlier and I have a lot questions about this. I'm not saying the external crossover may not have sounded good to his ears . I just question a lot that was said.

 

RE: Danny tackles the 3.7i, posted on October 27, 2022 at 23:48:38
emailtim
Audiophile

Posts: 5090
Joined: July 2, 2017
I don't fault Danny for doing his mods. That is what this forum used to be all about (Peter Gunn mods, DIY mods, XO's tweaks, parts swaps, bypassing, active XO, rewires, stands, wings, frames, delam repairs, chopsticks, razor, etc.).

His donor is probably no different than those that sent off their Maggies to PG for new furniture and a serial XO, but they were probably not new when they shipped off (except for the base models).
.

2022/03/30 Historical Records CENSORED

 

RE: Danny tackles the 3.7i, posted on October 27, 2022 at 23:53:07
emailtim
Audiophile

Posts: 5090
Joined: July 2, 2017
What are your questions ?
.

2022/03/30 Historical Records CENSORED

 

RE: Danny tackles the 3.7i, posted on October 28, 2022 at 01:17:14
Roger Gustavsson
Audiophile

Posts: 1946
Location: Huskvarna
Joined: February 12, 2010
His way of measuring a large dipol panel speaker is a bit odd to me. You cannot measure it at 60 inches. There is little connection to the perceived response.

The response of the ribbon tweeter is not like the same type of ribbon in the 3.6. This is how it measure in the 3.6, just the tweeter with its high pass crossover.



This is what I get at the listening position, 4m from the speaker(s).



 

RE: Danny tackles the 3.7i, posted on October 28, 2022 at 07:09:46
Davey
Audiophile

Posts: 2469
Joined: September 26, 2013
Based on his efforts, is it now everybody's understanding the 3.7i crossover is improperly designed???
This is the premise he's establishing, so I'm wondering how much this sort of thing moves the needle with owners and potential owners.

Dave.

 

RE: Danny tackles the 3.7i, posted on October 28, 2022 at 07:58:35
bluesy41
Audiophile

Posts: 129
Location: Seattle
Joined: February 20, 2018
My question/ problem is with measurement. I could be wrong or missed thus in the video as I was watching while working. But didn't he say these were straight from the factory? If so how many hours did he allow for the 3.7i's to break in? Wouldn't that impact the measurements? As a Maggie owner I've experienced them to be unlistenable out of the box for at least 50 hours and IMO don't hit their stride until roughly 250. I don't doubt his crossover sounds phenomenal, my concern is it a fair test.

 

RE: Danny tackles the 3.7i, posted on October 28, 2022 at 13:52:03
emailtim
Audiophile

Posts: 5090
Joined: July 2, 2017
Towards the end of the video he discusses break in and mentions they were NOT fully broken in (including the bass Mylar stretching). He also mentioned the amp he was using.

I think he estimated they were about half broken in at the end of the development process but would have to rewatch the video to be certain.
.

2022/03/30 Historical Records CENSORED

 

RE: Danny tackles the 3.7i, posted on October 28, 2022 at 22:00:34
bluesy41
Audiophile

Posts: 129
Location: Seattle
Joined: February 20, 2018
So wouldn't that skew his original measurements? That was my biggest issue outside of the lack of bass comment. I mean if you're going to do this I would like to see size of room, model of amp and other components. Was it a integrated amp, tube amp or a class A Pass Labs. To me that information would of been helpful.

 

RE: Danny tackles the 3.7i, posted on October 29, 2022 at 06:03:24
shumi
Audiophile

Posts: 149
Location: Virginia
Joined: January 11, 2020
The 3.7s were shipped to him directly from the factory and he drove them with two monoblocks rated at 100 watts peak power.

 

RE: Danny tackles the 3.7i, posted on November 3, 2022 at 16:27:28
riverdinaudio
Audiophile

Posts: 9
Location: Virginia
Joined: February 20, 2013
Let us pray that anyone interested in a Magnepan will trust their ears!
Danny has some clear biases and to operate on a fresh speaker is troubling. It is also notable that his measurements always seem to conflict with everyone else's.
I enjoy his videos and learn quite a lot but I have 50 years of personal
audio experience to filter what I am shown with what I know. Or some might say, my personal biases! I started with the MG2c - 3A - 4A - 20.0 - 1.7 and now the 3.7i. There will always be a Magnepan in my house. I consider 250 watts into 4 ohms a minimum. I do want to remove the crossover from my 3.7i and install jacks for direct contact with
the drivers. That opens a world of possibilities because in the end I am all things DIY. Magnepans are just fine as designed and built but it only costs $1200 and a couple days labor to see if Danny is correct.

 

Page processed in 0.031 seconds.