I'd prefer to try the Primus 150, among the Infinities 🙂 because it looks better, more sober...whatever this means 🙂
well, it just makes me bump my head like silly on the 1028A 😛
it's still anyone's guess why the sound is better on sockets...I've asked the browndog guy, but he told he's half deaf a little while ago...so he prolly won't be of much help.
anyway, I'll put them all back on socket and call it a day...they sound so damn good on those
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Well I have fired it up today... works perfectly... once I found a tape.
Just recorded a CD onto it to try.
And you know what ! It holds it's own even today. It was reckoned to outperform even many a Nakamichi at the time 🙂
And all with 4558 opamps too.
This is the one, with Dolby C
http://www.walkmancentral.com/products/wm-d6c
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So I'm not wrong in finding that that uPC 4570 opamp sounds quite good...am I? 🙂
At least I know it must be far better than a JRC 4558, with all the due respect..
At least I know it must be far better than a JRC 4558, with all the due respect..
No, the contrary.
If the crossover is similar to the one of my Alphas there is a resistor after the cap, if you swap that one with another 0,2-0,3 Ohm bigger you retain the original response.
If you swap the cap without compensation resistor you shoud have a 0.5-1.0 dB more on tweeter, going to the colder side...
These alumimum/ceramic drivers are very accurate, neutral and unforgiving even with an elco they sound so but with a hint of grain and harshness.
If the source/ampli/cables chain is only a bit could they sound cold.
'Light blue' shoud be the right color, I would say...😉
A sligthly warmer cap like Obbligatos should make a wonderful job in that role.
Yes Primus are more 'classic', they're similar to Alphas in that regard:
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Yeah sorry, I'd realized my silly mistake. 😱
That is one more reason not to tweak crossovers, anyway; ain't it? I would rather buy a speaker that (like my Polk's) already has a decent film cap on the tweeter. Or else, I'd leave whatever it has. I'm not a hardcore tweaker anymore 🙂
Yes...the Alpha and Primus look nice. I think the Primus look best, personally, again...whatever it means 🙂
I'd also heard my Polk at a Media World side by side with the Beta 20, of course both to burn in.
The Polk held its own well in precision, beating a Wharfedale Diamond 8.1 and approaching the merciless tweeter of the Beta 20.
The Polk held its own well in precision, beating a Wharfedale Diamond 8.1 and approaching the merciless tweeter of the Beta 20.
anyone's got an idea of what op-amps there could possibly be in this mixing board?
picture was shot in 1979 at Sly & Robbie's studio in Kingston, Jamaica.
maybe I should ask this english expert Andrea likes so much, can't recall his name.
An externally hosted image should be here but it was not working when we last tested it.
picture was shot in 1979 at Sly & Robbie's studio in Kingston, Jamaica.
maybe I should ask this english expert Andrea likes so much, can't recall his name.
Jim Williams? If you really want to know (whatever difference it makes for you), it's a good idea 🙂
I dunno, for fun? I'm quite sure Rupert Neve never used op-amps in his mixing boards, though..
PS: he was using discrete op-amps apparently: Rupert Neve op-amps - Google Search
Rupert Neve Designs – Evolution
PS: he was using discrete op-amps apparently: Rupert Neve op-amps - Google Search
Rupert Neve Designs – Evolution
it's clear than a 5532/5534 will never sound as good as a burson, but an AD797B or LT1028A can clearly compete/exceed it.
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Is there any experience with the OPA1632? How does it sound?
It's a fully differential opamp (and not pin-compatible) with specs:
-Noise:1,3nV
-Slew Rate 50V/us
-Gainbandwith: 180MHz
-Output:at least 50mA
-Distortion: 0,000022%
It's a fully differential opamp (and not pin-compatible) with specs:
-Noise:1,3nV
-Slew Rate 50V/us
-Gainbandwith: 180MHz
-Output:at least 50mA
-Distortion: 0,000022%
Not yet. They'll be sent after Jan. 23 anyway.
I might put the OPA1642 into a cheap small-sized DVD player I just bought, for my 'bedside system' to replace a (however good) Kenwood portable CD player. Provided that the player sounds good to begin with. 🙂 Either this or the LME49725.
I have samples but never used them, due to that somewhat schizophrenic layout of pin connections. 😱
This device is for a specific use... having differential outputs.
If you are interested in the theory and applications have a read here,
http://focus.ti.com/lit/an/sloa099/sloa099.pdf
I think Andrea might skip that bit 😉
If you use just one of its differential outputs (the + output), it will work just like a normal opamp, only with more distortion than specified. 😉
And I'd see no reason to want to use it in a normal (non differential) application, now that the OPA1611 exists.
Hi Mooly,
The feature to get a balanced output from a single input interest me.
And thanks for the link, most interesting indeed.