McIntosh C39

jhAtl

New Member
I have a MC7300 and C35. I just took on a C39 and while it was in place with MC7300 and Oppo-103 playing a Bray "Darjeeling Limited", not that it matters, but about 1 hour into the C39, it shut down. Now it was at about 19 volume, normal room listening, not above or high volume/power. When I say it shut down, it stopped working, no sound, all lights but 1 went off. The 1 light was the selector for phono, TV, Tape, etc, was on but dim. I turned it off and waited 3-5 min and on again with same results. MC7300, lights on and waiting. I turned it all off to switch to C35. I unplugged the balanced outputs and decided to turn it on and plug them in while on. The system came back up as if nothing was wrong.. Any insight?????? I'm trying to decide if I want to keep it or is this a warning to get my money back before it becomes an issue.
 
The C39 has a relatively complex power supply to support all the video and SS functions. Sounds like part of the supply is intermittent. A restored C35 will run circles around it and most newer preamps.......
 
The C39 has a relatively complex power supply to support all the video and SS functions. Sounds like part of the supply is intermittent. A restored C35 will run circles around it and most newer preamps.......
Thanks for the thought. Yes, I own the c35 and the phono as well as everything sounds excellent. I am getting a refund on the c39. I wanted it for HT. Any suggestions are welcome.
 
From a HT standpoint the C39 is pretty outdated. If I were in your shoes I would return it as quickly as possible as something is not right with that unit. Don't attempt to "fix" it, simply get your money back if you can.
 
It has been stated numerous times in this forum, buy from a reliable source such as AudioClassics and you have peace of mind. They can also point you to the right equipment rather than guess what you need.
 
It has been stated numerous times in this forum, buy from a reliable source such as AudioClassics and you have peace of mind. They can also point you to the right equipment rather than guess what you need.
Mamrak1:
1. The c39 was not a guess, but an addition so not sure what you are talking about.
2. Purchased the c39 from reputable servicing dealer so the return was not an issue and was accepted.
3. My addition of the statement, any suggestions was meant as a lead in to "pointing.... right equipment".
4. The site is also full off the cuff statements and hijacked conversations.and statements meant to be helpful but simply pose more questions and provide no answers.
5. Did you have a suggestion or just an opinion?
 
Are you asking for home theater ideas?

Having designed and installed pro theater systems and installed very hi end home theater systems I always found integrating a theater into a excellent stereo system to be very lacking......no matter how much money you threw at it.
 
Are you asking for home theater ideas?

Having designed and installed pro theater systems and installed very hi end home theater systems I always found integrating a theater into a excellent stereo system to be very lacking......no matter how much money you threw at it.
I'll keep that in mind. Thanks!
 
Just remember a movie sound track designer builds up the theatrical sound illusion from the center speaker out, to them the center speaker is the most important part of the system.

A audio stereo sound engineer tries to create the 3D illusion of space between two speakers from contrived or actual recorded cues in the recorded signal. Using the L,R and Surround speakers the theater designer can make their own spacial cues.

I used to have fun with my local baptist and more fundamental church clients in pointing out that a church system had more in common with a movie theater sound system than a home stereo. Both fail miserably if you can not understand the main speaker's words.
 
The only way you can make a good stereo system into a good HT system is if you have the correct L&R speakers first and then add a matching center speaker . They should be speakers with a Directionality coefficient (Q) high enough to reproduce a signal with high intelligibility. Speakers that spread the sound all about the room don't work for HT. So if you think Line array and Horn based speakers don't make for good stereo, well its your loss. Because point source don't work for HT. Once you have your 3 front directional speakers then you have to decide what type of surround speakers you want. If you want the surround speakers just to recreate the ambience of space, for a concert recording or older movies, you can use point source speakers or bi directional speakers. But if you like todays current movies with sources of sound defined as they travel about the room then you need directional speakers. Line arrays or horns. Because the side and rear speakers are normally closer than the fronts the directionality of the fill speakers doesn't have to be as high, and because the bass is handled by LFE speakers they don't have to be as big either. Its a delicate balancing act. The more effects or fill speakers, the louder they sound the more directional or closer you have to sit to the front speakers. If your room were a perfect anechoic chamber with no reflections then the directionality of the speakers could be scaled way back, But the more reflective surfaces you have the more directional your speakers have to be. Also the furniture in the room should be as absorbent as the humans in the room. So the sound balance doesn't change with the room empty, full, or partly full. That means leather and plastic seating are out. Floors should be padded and carpeted, walls and ceiling absorbent. This absorbs stray sounds, decreases the need for speakers with very high Q. But also demands the system be able to put out more undistorted sound as the system doesn't have the room acoustics to help the system as a stereo system would desire

Stereo systems depend on the surfaces of the room to re-enforce the ambient sound on the recording to make a recording seem more life like. The problem today is most recordings are contrived in a studio using digital effects to simulate the atmosphere of where the performance is suppose to take. Knowing what the engineer intended can only be recreated by using highly directional speakers removing the sound of your room allowing the studio sound to shine thru. So where some folks think directional HT speakers don't make for great sound, actually those same speakers are the only way of you hearing what the recording engineer intended.

Now you know why LPs have made a resurgence. Engineers in the past wanted to capture the live sound of a performance in an acoustical space. it wasn't until Les Paul came along effects started being part of the recording process. The idea was to keep the sound real. Later on with the introduction of the Moog and other gimmicks during the disco age that pop music was transferred from on stage sound to studio sound. Studio sound was crude at first so speakers that spread the room around the room to add smoothing room acoustic were still the first choice by most folks. But as things have changed so must your system. How you choose to do that is your choice. Directional or non directional speakers for stereo. HT is easy. Directional speakers with the understanding the center channels is the most important. Not an after thought.

We have talked about the quality of the HT system, Now we have talk about quantity. point source speakers are usually confined to below 92 db sensitivity, with only the big Coaxial speakers approaching 100 db sensitivity. Home theatre systems should be able tp produce 110 db from the center speaker. which its quite easy for a Speaker system made by JBL, Altec, and Klipsch. 5 to 20 watts is all thats necessary. Point source speakers would need any where 75 to 400 watts. And if you plan on producing the peaks, you might need 1000 watts. Tannoys, Altecs, JBL, other directional speakers might require 100 watts or less less. Where line arrays fit in this situation. Well back in the 70's the only way to produce 115 db as Paul Klipsch recommended with less than 1% distortion was with a line array spreading the demands across many speakers working to gether. It wasn't until the very late 80's that low distortion was extended to the woofers using new woofer voice coil and magnet design, with multiple drivers. So for low distortion the line array was the solution. Today with JBL and others using the same woofer technology and extending the magnet design to the mids with modern rare earth diaphragms for their drivers lower distortion was added to horn speakers. Klipsch redesigned their speakers, too. Other manufacturers have incorporated the new technologies, too. So today we can have point ounce, Horn or line array speakers only requiring different amounts of power to reach similar levels with the same low distortion.

You can use any type of speaker with low distortion for stereo. But for HT you still need directional speakers unless you are willing to make your HT space an approximate anechoic chamber. Its just more economical to use a good Horn loaded system and then only the most recent ones to guarantee the lowest distortion, with the largest dynamic range with moderately powerful AV processor- amps.

The question is do you as the consumer need all this performance. The way the studios mix the DVD sound you have to turn up the volume a certain amount to get a comfortable speaking voice level. Once that that is established your system has to handle the built in dynamic range of the recording . Some units have a night switch to help control levels. I would like to see more programming choice allowing us to limit the dynamics of some movies with out destroying the intended artistry. The other choice is to use amps with built in limiting to control the dynamic range or add limiters to the system. The film industry and the HT designers of electronics, don't make it easy or cost effective.

Now as others have said as a HT processor the C-39 time has expired a long time ago. It has a lot of flexibility and if you want to add some speakers to add ambience to a room for Stereo recordings, it does that quite well. But for producing current movies, nope, no way, no how. We had issues with every C-39 we sold, MX 130, too. But they sounded good in the stereo mode.
 
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Twii, I know you spent time at Sy-Aud-Com and while I did not visit the farm but did it at EAW with additional time honing my skills with EASE and EAW products I know you know that a speech or dialog dependent system needs to be built from the center out. If you do not understand the actor's words the system fails......period.

The problem with a stereo based theater system is the center speaker is given the lowest priority not the highest priority.....center out vs stereo's outside in is what makes a good theater.
 
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