JBL 3677

We use the Tune Method to evaluate performance

Moderator: Staff

matthias
Very active member
Very active member
Posts: 2098
Joined: 2007-12-25 16:47
Location: Germany

JBL 3677

Post by matthias »

lejonklou wrote:Yes, the Swedish group of 3677 owners collaborated in testing various resistors (including no resistor) instead of the protectors. The result was very interesting: The protectors seem to make the HF driver sound better! They can't be removed without the speaker performing worse.
I have the impression there is not so much that can be done to improve the filter of the 3677!

Matt
User avatar
lejonklou
Administrator
Administrator
Posts: 6550
Joined: 2007-01-30 10:38
Location: Sweden
Contact:

Re: JBL 3677

Post by lejonklou »

matthias wrote:I have the impression there is not so much that can be done to improve the filter of the 3677!
Maybe there is. The same group will be testing some other modifications soon.
matthias
Very active member
Very active member
Posts: 2098
Joined: 2007-12-25 16:47
Location: Germany

Re: JBL 3677

Post by matthias »

Music Lover wrote:Linnofil visited my yesterday to deliver the stands.
The 3677's is now SOOOO much better it's hard to believe!
Every aspect is improved.
That said, the 3677's on piles of books were already wonderful.
The stands is a MUST HAVE. The performance is at-least twice as good, if now more.
Linnofil, I thank you from the bottom of my heart :)
These stands going to be a huge seller together with the 3677.
I never heard anything remotely close - this is live...the real deal...just music. It simply flows.
Nobody that hear these speakers going to resist. They are a must have.
ML, can you or Linnofil please post a picture of the stands?
Thanks.

Matt
matthias
Very active member
Very active member
Posts: 2098
Joined: 2007-12-25 16:47
Location: Germany

Re: JBL 3677

Post by matthias »

lejonklou wrote:
matthias wrote:I have the impression there is not so much that can be done to improve the filter of the 3677!
Maybe there is. The same group will be testing some other modifications soon.
Curious about, hopefully these mods have nothing to do with Linn Exakt.

Matt
Linnofil
Very active member
Very active member
Posts: 343
Joined: 2007-02-05 22:22
Location: Gothenburg, Sweden

Re: JBL 3677

Post by Linnofil »

matthias wrote:ML, can you or Linnofil please post a picture of the stands?
I only have pictures from other customers homes. I will let them post the pictures they feel comfortable with sharing.

Christian has posted a picture here: http://www.lejonklou.com/forum/viewtopic.php?f=2&t=3163
Image

There is now more info and pictures in the separate thread for the stands: http://www.lejonklou.com/forum/viewtopic.php?f=2&t=3400
Last edited by Linnofil on 2016-09-01 14:13, edited 2 times in total.
User avatar
lejonklou
Administrator
Administrator
Posts: 6550
Joined: 2007-01-30 10:38
Location: Sweden
Contact:

Re: JBL 3677

Post by lejonklou »

matthias wrote:Curious about, hopefully these mods have nothing to do with Linn Exakt.
Ha ha ha!

Very funny Matthias!
User avatar
ThomasOK
Very active member
Very active member
Posts: 4371
Joined: 2007-02-02 18:41
Location: United States
Contact:

Re: JBL 3677

Post by ThomasOK »

Of course, the ultimate option would seem to me to be Fredrik making an active crossover with subwoofer summing section. Imagine what these things could do with the proper crossover and four (or five) TM2 amps!

Quite the satellite/subwoofer system, don't you think? :-)
The LP12 Whisperer
Manufacturer, Distributor, Retailer and above all lover of music.
User avatar
ThomasOK
Very active member
Very active member
Posts: 4371
Joined: 2007-02-02 18:41
Location: United States
Contact:

Re: JBL 3677

Post by ThomasOK »

As I received my stands last week and finally got the second one setup last night I posted a report on them under the Stands, by Linnofil thread here:

http://www.lejonklou.com/forum/viewtopic.php?f=2&t=3400

Since it was also as much about the sound of the speakers and whole system I felt I should mention it here.
The LP12 Whisperer
Manufacturer, Distributor, Retailer and above all lover of music.
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

Some pics from my modification where I replaced all local wiring with split K400's and put the X-overs in a wooden box outside the speakers.

Get these banana socket's (female), red and black ones.
IMG_5392.jpg
Remove the plastic plate from the 3677. On the back side is the X-over attached. Take plenty of pics and document all cables/colures. Cut all wires and remove the X-over.
IMG_5341.jpg
Take pics inside the speaker and then remove the treble horn and bass unit.
Remove the X-over from the plastic plate, drill holes and mount the banana socket's
IMG_5387.jpg
You do not have the required permissions to view the files attached to this post.
Last edited by Music Lover on 2016-09-29 15:05, edited 2 times in total.
It's all about musical understanding!
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

Then cut the K400 and solder them to the speaker elements. Put them back to the 3677 and solder the K400's to the banana sockets. Done!

To be continued...
Last edited by Music Lover on 2016-09-29 15:27, edited 1 time in total.
It's all about musical understanding!
Nature
Active Member
Active Member
Posts: 85
Joined: 2010-03-29 00:13

Re: JBL 3677

Post by Nature »

Music Lover wrote:Some pics from my modification where I replaced all local wiring with K200 and put the X-overs in a wooden box outside the speakers.
Are you really shure you used K200 cable and not a split K400 cable?

This is Linn K200 cable:
Image
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

Nature wrote:Are you really shure you used K200 cable and not a split K400 cable?
Good point!
We have been using the name K200 when we split K400, but now when Linn released the "silver K200" we have to be careful.
I now updated my posts.
It's all about musical understanding!
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

The two X-overs were placed in a wine box.
IMG_5356.jpg
The X-over inside the box (paper dummy)
IMG_5357.jpg
X-over in operation, placed on a Harmony shelf
IMG_6216.jpg
You do not have the required permissions to view the files attached to this post.
It's all about musical understanding!
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

The 3677 with new speaker connection (spelling error, sorry)
You do not have the required permissions to view the files attached to this post.
It's all about musical understanding!
User avatar
Tony Tune-age
Very active member
Very active member
Posts: 1589
Joined: 2009-12-19 19:07
Location: United States

Re: JBL 3677

Post by Tony Tune-age »

Hoping to hear these speakers soon, along with the Linnofil stands too! It's possible I might decide to sell my Isobarik speakers and stands, to purchase the JBL's and stands...if I can live with less bass.
Tony Tune-age
matthias
Very active member
Very active member
Posts: 2098
Joined: 2007-12-25 16:47
Location: Germany

Re: JBL 3677

Post by matthias »

Thank you, Music Lover,
is there an optimal length of the speaker cable between
1.) amp and XO box
and
2.) XO box and 3677?

Matt
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

matthias wrote:Thank you, Music Lover,
is there an optimal length of the speaker cable between
1.) amp and XO box
and
2.) XO box and 3677?

Matt
1) we haven't tested yet. The cable I use is app 1m
2) I use the 2.48m from Lejonklou, we believe that is the one to use. But again, not evaluated.
It's all about musical understanding!
matthias
Very active member
Very active member
Posts: 2098
Joined: 2007-12-25 16:47
Location: Germany

Re: JBL 3677

Post by matthias »

Music Lover wrote: 1) we haven't tested yet. The cable I use is app 1m
2) I use the 2.48m from Lejonklou, we believe that is the one to use. But again, not evaluated.
Thanks,
what happens musically with the external crossover?
Have all the "3677 forum members" now switched to the external crossover?

Matt
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

I think it's only me end Christian. But Eric started planning for it.
You obtain a better insight into the music and also better sound. The X-over is VERY sensitive regarding placement, a good rack is going to further enhance the performance.
It's all about musical understanding!
User avatar
ThomasOK
Very active member
Very active member
Posts: 4371
Joined: 2007-02-02 18:41
Location: United States
Contact:

Re: JBL 3677

Post by ThomasOK »

Music Lover wrote:I think it's only me end Christian. But Eric started planning for it.
You obtain a better insight into the music and also better sound. The X-over is VERY sensitive regarding placement, a good rack is going to further enhance the performance.
You forgot about me. I posted a photo of one of my crossovers in the wood box and info on what I did on the previous page of this thread.
The LP12 Whisperer
Manufacturer, Distributor, Retailer and above all lover of music.
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

Sorry!!
It's all about musical understanding!
donuk
Very active member
Very active member
Posts: 406
Joined: 2010-02-21 13:25

Re: JBL 3677

Post by donuk »

I suggest split K400 henceforth be known as K400/2

Donuk Sunny downtown York
User avatar
Music Lover
Very active member
Very active member
Posts: 1673
Joined: 2007-01-31 20:35
Location: In front of Lejonklou/JBL/Ofil

Re: JBL 3677

Post by Music Lover »

NOTE
Inside the 3677, I use the "split K400" WITH the black plastic coating still in place. This to hold the hot and neutral cable strands in place, keeping the rotation and distance between them correct.

According to Fredrik, this is important so I just adapted :)
It's all about musical understanding!
User avatar
ThomasOK
Very active member
Very active member
Posts: 4371
Joined: 2007-02-02 18:41
Location: United States
Contact:

Re: JBL 3677

Post by ThomasOK »

Music Lover wrote:NOTE
Inside the 3677, I use the "split K400" WITH the black plastic coating still in place. This to hold the hot and neutral cable strands in place, keeping the rotation and distance between them correct.

According to Fredrik, this is important so I just adapted :)
Same here. I've even taken to twisting the small ends where they connect to the amp and the speakers, although I haven't A/B compared the outcome yet.
donuk wrote:I suggest split K400 henceforth be known as K400/2

Donuk Sunny downtown York
But wouldn't that make it the mark 3 version of Linn K400? ;-)

Maybe we should take a page out of the book by one of my favorite styli cleaners and call it Original K200!
The LP12 Whisperer
Manufacturer, Distributor, Retailer and above all lover of music.
albadrex
Active Member
Active Member
Posts: 50
Joined: 2015-04-29 13:59
Location: Glasgow
Contact:

Re: JBL 3677

Post by albadrex »

AdobePhotoshopExpress_1f5ca435a34b4a4eb02d94ba5318893a.jpg
Very excited.. the 3677 conspiracy grows!
You do not have the required permissions to view the files attached to this post.
KDSR(0), Sagatun 1.1, Tundra 2.0a, JBL 3677, Ofil Stands
Post Reply