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Marantz 2600 Refurb Thread

So it produces 330wpc @.02% thd, before clipping on your machine? What does the 470wpc peak mean then, or under what circumstance would it be hit or used? Hopefully my question makes sense.
 
wildwill532 said:
So it produces 330wpc @.02% thd, before clipping on your machine? What does the 470wpc peak mean then, or under what circumstance would it be hit or used? Hopefully my question makes sense.
Click to expand...
Yes you make sense. Let me start off with explaining the most energy in a waveform is a sine wave and a continuous one is quite a chore for an amp. Especially both channels at once into loads as was the case for my test. Normal music waveforms have quite a bit less energy and in short bursts and especially at higher frequencies, I wouldn't be surprised if this unit could easily hit 470 watts instantaneously without clipping. When I was testing the LEDs initially I had the output on the oscilloscope and it just distorted at the level it took to light the LEDs. Of course the speakers were disconnected! I was using an audio generator set fairly hot and using the volume knob which has 2dB click stops which are fairly far apart at such high levels. So if you see a red flash grab that volume knob and turn it down!
 
I should add that the 2600 has been on continuously 24 hours now and doing just fine! I played some albums this afternoon including some Led Zeppelin that I hadn't spun for quite awhile!
 
In your professional opinion how does it sound vs all the other stereos you've restored and played with? Sure it's a tank but does it give off sounds that you enjoy hearing?
 
Disclaimer!: I'm not a professional opinionator on sound, just electronics. Buuuuut, to me it is very clean with none of the "warming" type distortion of the earlier series such as the 2270. It is more like a 2275.

In the shop sound / burn in system, everything is very distinct sounding but without being tiring, I could listen to this day in and day out and be content with it. This is on some very laid back AR-11's with rebuilt crossovers - my favorites. I had not had anything on that system for a few days so my ears had some deprogramming time.

At the workbench, the speakers used are the old Radio Shack Minimus aluminum box ones with the 5" "woofer". The drivers are both non-original with the tweeters being some gawd awful DJ things with a metal cone sticking out and I've left them a little hot to compensate for my high frequency hearing loss so anything harsh here would become really annoying and it wasn't to me at all. The woofers have been replaced with Faital 5" mid bass drivers which I like very much and there was nothing wrong down to the 45Hz they're still flat at.

If you don't like the 2600 I saw that Eric might want it!
 
Wow Randy, you are a true artists. I have 2 Marantz 250s one of witch is the (M) that I'm currently working on. Need to finish up the relay board on one, and start the other unit in a few weeks. Your work is amazing, I've rebuilt a few amps/receivers now and it's some slow detailed work, your work is flawless, simply amazing!! You literally put a smile on my face seeing how detailed the woke was.

Kind regards,
John
 
This is some of the best reading material !!!
Always love a thread from Randy !
Great job once again ! And such detail....
 
TJacques said:
Did you have any luck with this? Is there anywhere else these files can be loaded so that, perhaps, another subscriber can upload them?

I definitely would like to see these scans, so that I can produce a text-searchable pdf for the archive. :)
Click to expand...

I have the scans and have made them text searchable already. For whatever reason I can not get a login to the database, I will ping the admin again.
 
I will mention again... tx's scans are excellent and the 2600 manual really helped me out on this rebuild. C'mon by buddy and I'll buy ya a couple of brewskies!
 
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