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Calling All "Vintage" Integrated/Receiver Owners - Page 741

post #11101 of 13591
Quote:
Originally Posted by brunk View Post
 

I like to use a feather duster (to pick up much as i can), followed by an air compressor :evil:

 

My current office-feather-duster doesn't quite reach into the vertical grooves of the amp; will seek finer instrument. Maybe something soft; washable...

post #11102 of 13591
Quote:
Originally Posted by MattTCG View Post
 

I have a question...there is a big difference when using  pre-amp between my dac and pioneer sx1050. The sound seems more dynamic and full without the preamp. I've used both the lyr and A2 as pre-amp with the same result. Any thoughts?

 

How does the SX-1050's own pre-amp sound? What Interconnects are you using? Lastly, when using external pre-amps, does the SX-1050 retain clarity of presentation sans body and dynamics?

post #11103 of 13591

My experience when using pre amps is that you end up adding the sound of the pre amp. Basically, you need a very good pre amp for it to be invisible power. But ime the sound always ends up thicker with less clarity than without.  

post #11104 of 13591
Quote:
Originally Posted by Silent One View Post
 

 

How does the SX-1050's own pre-amp sound? What Interconnects are you using? Lastly, when using external pre-amps, does the SX-1050 retain clarity of presentation sans body and dynamics?

 

I'm using audio quest golden gate IC's. They are not the be all, end all but very decent quality. The clarity seems to be there...just not as full or rich. 

post #11105 of 13591
Quote:
Originally Posted by MattTCG View Post
 

 

I'm using audio quest golden gate IC's. They are not the be all, end all but very decent quality. The clarity seems to be there...just not as full or rich. 

Curiously, how does the Pioneer's own pre-amp sound?

post #11106 of 13591
Quote:
Originally Posted by Silent One View Post
 

Curiously, how does the Pioneer's own pre-amp sound?

 

Great...

post #11107 of 13591

I'd like to add that implementing a preamp into the chain is not an arbitrary thing. Many things must be considered. For example, the DACs output impedance must be a good match with the preamps input impedance, and the preamps output impedance must be a good match with the amps input impedance. That's not taking into account if you have excessive gain issues, and whether an active or a passive pre is best for you. Plus, it does no good if you can't bypass the vintage amps own pre anyways, as all you're doing is inserting needless gain stages and circuitry.

post #11108 of 13591

My experience says that, in general, less is more.  When I listen to my main system I am routing the signal through the analog bypass inputs on the pre-amp.  Little or no active circuitry touching the signal - sounds very clean.  Second the point about impedance matching also.  When I first connected my JRDG1s to my preamp I had their input impedance set low.  Sounded awful.  Bumped it to 100K and it was a different system (the Rowlands have adjustable input impedance).  The preamp wanted a higher impedance.

post #11109 of 13591
Thread Starter 
Quote:
Originally Posted by LugBug1 View Post
 

My experience when using pre amps is that you end up adding the sound of the pre amp. Basically, you need a very good pre amp for it to be invisible power. But ime the sound always ends up thicker with less clarity than without.  

That's the same thing as just using the receiver without a preamp(unless he's adding one without separating  it from the power amp which I'm sure he's not). Just using a receiver as is, you are listening to the power amp and preamp at the same time. That's why many of the upper line receivers/integrates allow you to separate them to use a better preamp.  

 

The preamps in many of these vintage pieces have been notorious for being noisy. Separating the preamp and comparing  them to the modern preamp I had at the time was one of the things I use to do for fun whenever I've brought home a new "vintage toy" For example, with most of the gear I've done that with,  using the headphone out with any of my low impedance cans was way too noisy. So I would disconnect the jumpers, and plug in my preamp into the input of the receiver/integrated amp. Not only was the noise floor much lower, but I could drive iems from the headphone out with  a completely black background.

 

I know the first thing you must be thinking is "yeah, but that receiver probably needed to be recaped". Well, I've had the same result with my fully restored 9090db. I can get a black background by engaging  the -20 button with my w3000anv, but even then, I still get hiss and a little hum with my jh13. There have been some exceptions. Both the 2325 and 2330 have very good preamps. And the ka-907 have an excellent preamp...one of the best I've heard infact. But for the most part, the preamp in many of these vintage amps are noisy. Both sx1280s I've had were noisy with anything outside of orthos.

 

One last quick point....it's been well documented that many prefer the 1250 over the 1280. I read of a person over at ak who had both in his home to do a direct comparison. His results were, he thought they were similar but the 1250 pulled ahead because of the harshness in the lower treble of the 1280(I too have experienced this on both of mine). He then decided to separate the preamps and use the 1250 preamp on the 1280, and found the 1280 to sound exactly like the 1250 and vice versa with the 1250 using the 1280 preamp. 

post #11110 of 13591

^ Just goes to show how important a great preamp really is :L3000: 

Thanks for sharing Moodyrn.

post #11111 of 13591
I had an AK buddy of mine make me a solid walnut case for my fully restored SX-1980 - which really completes the restoration smily_headphones1.gif

post #11112 of 13591

That finish looks better:tongue_smile: than ice cream at a July picnic!

post #11113 of 13591

Thanks SO. I had him finish it with Arm R Seal - it's as smooth as it gets! :L3000:

post #11114 of 13591
Quote:
Originally Posted by Skylab View Post

I had an AK buddy of mine make me a solid walnut case for my fully restored SX-1980 - which really completes the restoration smily_headphones1.gif
  Warning: Spoiler! (Click to show)

Really nice job!

Is that the original metal work (vents)? 

post #11115 of 13591
Looks brand new! The slightly darker tone harmonizes nicely with the black meters.
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