Search found 1141 matches

by admin
Wed Jan 17, 2018 8:36 am
Forum: Troubleshooting/problems/manuals/schematics
Topic: Official Schematics and Manuals Thread (Registered Users)
Replies: 65
Views: 20831

Re: Official Schematics and Manuals Thread (Registered Users)

Hi mojn,
Any schematics that we have in our database can be found listed in the first post of this thread. Download instructions are also posted there as well.
by admin
Sat Jan 13, 2018 7:59 am
Forum: Amplifiers
Topic: MF2500 throwing 68 DCvolt out on right channel
Replies: 6
Views: 123

Re: MF2500 throwing 68 DCvolt out on right channel

Hi runner70. I also have a 2000 Evolution amp and love it. I, unfortunately, do not know its design history in detail. I too would be interested in the sound comparison of this now "older" amp vs something designed more recently. As for mods, one simple cheap mod that can be done and which my unit h...
by admin
Mon Jan 08, 2018 8:35 am
Forum: Member Presentation Thread
Topic: Hi From Malaysia
Replies: 1
Views: 29

Re: Hi From Malaysia

Hi, welcome to the site, it's great to have you with us!

You can find our schematic database here: viewtopic.php?f=17&t=128
by admin
Fri Jan 05, 2018 5:06 pm
Forum: Preamps
Topic: PV11 trouble shooting
Replies: 2
Views: 48

Re: PV11 trouble shooting

Hi Joel, Sorry to hear about your trouble. I presume you downloaded the schematic on our database at: http://www.conradjohnsonowners.com/viewtopic.php?f=17&t=128 Probably the easiest way to answer your question is to just open up the PV11 and do a visual inspection (don't forget to look on both side...
by admin
Mon Jan 01, 2018 12:29 pm
Forum: Classifieds and Wanted
Topic: Northlake Engineering Transformer
Replies: 2
Views: 91

Re: Northlake Engineering Transformer

I think you may have posted this in the wrong section as this is more for selling/buying. Anyway,... I don't own a premier one so I can't be specific but a little google search came up with some pictures of the premier one's internals. Do the transformers look like the ones in the pictures: http://w...
by admin
Thu Dec 21, 2017 3:57 pm
Forum: Amplifiers
Topic: MF2500 throwing 68 DCvolt out on right channel
Replies: 6
Views: 123

Re: MF2500 throwing 68 DCvolt out on right channel

Unfortunately, we do not have the MF2500 schematic in our database. If you have access to the unit you can try to take measurements backwards along the signal path and try to identify at what component the signals deviate from each other. However, you would have to be very careful and kind of know w...
by admin
Wed Dec 20, 2017 5:42 pm
Forum: Amplifiers
Topic: CJ Amp Recommendations -Sold my Premier 140 w/ CJD Teflon; have (3) CJ Pre's PV12 w/ phono, P17LS, P16LS2
Replies: 4
Views: 91

Re: CJ Amp Recommendations -Sold my Premier 140 w/ CJD Teflon; have (3) CJ Pre's PV12 w/ phono, P17LS, P16LS2

I agree, the more power the better. I do think that with many (if not most) speakers you don't have to go "crazy". Quality power trumps Quantity in most cases. There are cases where you do need a lot of power but that is usually restricted to playing music at high volume on inefficient speakers. I w...
by admin
Tue Dec 19, 2017 11:02 pm
Forum: Amplifiers
Topic: CJ Amp Recommendations -Sold my Premier 140 w/ CJD Teflon; have (3) CJ Pre's PV12 w/ phono, P17LS, P16LS2
Replies: 4
Views: 91

Re: CJ Amp Recommendations -Sold my Premier 140 w/ CJD Teflon; have (3) CJ Pre's PV12 w/ phono, P17LS, P16LS2

I can't speak to all of those, but I do own the PV12 and I use a CJ Evolution 2000 amp. I need a lot of power because I have very inefficient speakers. I can compare the PV12 to the PF2 and can say that the PV12 is definitely a big upgrade. If memory serves, the Klipsch Forte is a very sensitive spe...
by admin
Tue Dec 19, 2017 10:54 pm
Forum: Member Systems Gallery
Topic: A Couple of Shots of the System
Replies: 3
Views: 160

Re: A Couple of Shots of the System

Great system. Very cool stuff... I'm sure you know what my favorite pieces are! Those monoblocks are just amazing. How are the acoustics of the environment? Looks like a difficult room to set up correctly with the large glass window and tight space. Do you use any acoustic treatments or find the roo...
by admin
Sun Dec 17, 2017 11:00 pm
Forum: Amplifiers
Topic: ART300 Amplifier Review
Replies: 3
Views: 180

Re: ART300 Amplifier Review

Wow! What great articles. Thank you so much for the contribution of such a great review and interview with the founders of our favourite audio company!
by admin
Sat Dec 16, 2017 11:29 pm
Forum: Amplifiers
Topic: Cables for my MF2550
Replies: 2
Views: 67

Re: Cables for my MF2550

If you are looking for "budget" cables I have had very good experience with Signal Cable and Blue Jeans interconnects.

In the DIY section of this forum, I've posted about making my own interconnects which use the Blue Jeans cable with some locking RCA plugs.
by admin
Wed Dec 13, 2017 12:08 pm
Forum: CJO Feedback, Suggestions and Report Site Problems
Topic: cant find schematic mv55
Replies: 1
Views: 81

Re: cant find schematic mv55

You can download all available schematics via following the directions in the text file attached to the first post here: viewtopic.php?f=17&t=128

If you have any difficulty please let me know exactly what steps you have taken so I can help you troubleshoot.
by admin
Wed Dec 13, 2017 11:11 am
Forum: Off-topic
Topic: Christmas comes early
Replies: 16
Views: 3276

Re: Christmas comes early

ronenash wrote:
Wed Dec 13, 2017 8:35 am
King Crimson - In the Court of the Crimson King!!

Indeed iconic and instantly recognizable. Enjoy the Evolution. Fantastic amp.

Mary Christmas.
It seems like King Crimson is not on any of the music streaming services. One of the last holdouts.... kind of a shame. Great music.
by admin
Tue Dec 12, 2017 12:07 pm
Forum: Member Presentation Thread
Topic: New member from Hong Kong
Replies: 1
Views: 96

Re: New member from Hong Kong

First, welcome to CJO, it's great to have you with us! I think you may be our first member from Hong Kong. I'm actually planning on spending a week there in April. It's going to be my first time there and I am very excited about seeing such a famous city. As for the schematic, you can download them ...
by admin
Tue Dec 12, 2017 11:59 am
Forum: Off-topic
Topic: Christmas comes early
Replies: 16
Views: 3276

Re: Christmas comes early

Just wanted to wish everybody a very happy holiday season. Best wishes from CJO to you and all your loved ones!


CJO Xmas Video 2017

Image
by admin
Sun Nov 26, 2017 10:34 pm
Forum: General Discussion - CJ related topics
Topic: Repairs and/or modifications to C-J products
Replies: 2
Views: 91

Re: Repairs and/or modifications to C-J products

My two cents is that if you want to have the flexibility to change power cords, then an IEC plug placement is probably one of the easiest DIY projects. The hardest part is cutting the case for the plug but the plug border typically overlaps a little so if the cut is not perfect you will still be fin...
by admin
Sun Nov 26, 2017 8:04 am
Forum: Member Presentation Thread
Topic: Hi from Montreal
Replies: 1
Views: 39

Re: Hi from Montreal

Hi Bert,
Welcome to the site. Very nice to have you with us.
by admin
Sun Nov 26, 2017 8:02 am
Forum: Member Presentation Thread
Topic: Hi from East Bay, CA
Replies: 5
Views: 75

Re: Hi from East Bay, CA

Welcome to the site, it's nice to have you with us!

That is one good looking system! Very nice.
by admin
Thu Nov 23, 2017 6:56 pm
Forum: General Discussion - CJ related topics
Topic: Correct Phase
Replies: 3
Views: 62

Re: Correct Phase

Both the PV9 and Evolution 2000 are phase inverting so if the sub is after the amp, you don't have to phase invert it.
by admin
Thu Nov 23, 2017 7:14 am
Forum: General Discussion - CJ related topics
Topic: Correct Phase
Replies: 3
Views: 62

Re: Correct Phase

First, welcome to the site. Which CJ preamp are you using? We should make sure that it is phase inverting. Presuming it is we need to know how the sub is connected to the system. If it's via RCA from the preamp as a passthrough, you would need to select 180 phase on the sub (ie phase convert). You a...