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Post by jin167 on Sept 7, 2018 1:56:05 GMT -6
I remember reading comments of some people who were praising the quality of the sound they got out from the 1073lb + la2a combo. Hmm..
Anyways, after years of buying and trying out clones and 'inspired by' units, I came to a conclusion that how much the product sounds like a real thing or its name value doesn't really matter that much or at least its importance is minuscule in comparison to other factors like the design/quality of the unit, its actual performance, and most importantly, customer support.
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Post by wiz on Sept 7, 2018 2:18:14 GMT -6
I can’t watch the video S I don’t have enough data on my phone..but if that aint Rob’s workshop I will walk buck naked backwards down Broadway 8)
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Post by jin167 on Sept 7, 2018 2:32:43 GMT -6
I can’t watch the video S I don’t have enough data on my phone..but if that aint Rob’s workshop I will walk buck naked backwards down Broadway 8) You're correct hahahaha |
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Post by Johnkenn on Sept 7, 2018 6:57:44 GMT -6
So what does that even mean?
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Post by svart on Sept 7, 2018 7:03:33 GMT -6
I remember reading comments of some people who were praising the quality of the sound they got out from the 1073lb + la2a combo. Hmm.. Anyways, after years of buying and trying out clones and 'inspired by' units, I came to a conclusion that how much the product sounds like a real thing or its name value doesn't really matter that much or at least its importance is minuscule in comparison to other factors like the design/quality of the unit, its actual performance, and most importantly, customer support. People like it because of the wooly-thick type tone you get from the neve/LA2A combo, which is due to the harmonics from distortion. Believe it or not, people LIKE the sound of distortion on most things. It's just that they've been conditioned by marketing to believe they shouldn't.. So they'll buy certain gear on the promise that it's super clean, and then add tons of compression, limiting, and saturation on top to get it to sound harmonically rich (read: distortion).. |
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Post by svart on Sept 7, 2018 7:04:57 GMT -6
So what does that even mean? It means the 1073LB can't drive 600R loads like the input of an LA2A without lots of distortion.. And it also insinuates that the LB must be different from the original somehow. |
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Post by jazznoise on Sept 7, 2018 8:53:17 GMT -6
Well I imagine it is since the output stage is probably running at a much lower level. The output stage should be a power transistor, with a pretty low resistor value on the emitter (47ohms?) An original 1073 can run a lot of voltage into a 600 ohm load. The Heritage Audio clone specifies 26dB into 600 ohms and the transformers should be designed for that sort of power.
500 series stuff doesn't supply the current per unit for that. Power stage impedance and voltage noise levels have to be sacrificed to save on power consumption. A 500 series la2a would probably be fine as I imagine they'd tailor the input z to handle a 500 series Pres output (probably 2.5-10k?)
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Post by christopher on Sept 7, 2018 10:08:30 GMT -6
Thanks for the explanation, the video made me feel like he was criticizing the 1073 as bad design. It didn't occur to me he is criticizing the re-design as inferior to the original e:fixing broken gear. Shoot, I was just thinking someone's going to model a plugin after this.
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Post by matt@IAA on Sept 7, 2018 11:14:53 GMT -6
Wonder what he’s powering it with.
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Post by m03 on Sept 7, 2018 11:56:14 GMT -6
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Post by svart on Sept 7, 2018 12:54:02 GMT -6
Very possible. I do see a SMPS brick sitting on the desk, which is what I'm assuming is powering the unit. Based on the 1/2 brick size, that's probably able to supply enough current to be considered "full power", although I'm just guessing. |
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Post by jazznoise on Sept 7, 2018 13:13:11 GMT -6
Wonder what he’s powering it with. I doubt he's under powering it, the current limitations of the 500 series means the emitter resistance for the power stage is much higher. Its a couple of Watts to run a 1073 afaik. What's the current limitation for 500 series, 100mA at +/- 24V? |
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Post by matt@IAA on Sept 7, 2018 13:47:18 GMT -6
VPR spec is 130 mA per rail at +/-16V.
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Post by jazznoise on Sept 8, 2018 16:13:08 GMT -6
VPR spec is 130 mA per rail at +/-16V. So this threw me as the original 1073 draws 133mA @24v. That's within spec! Then I looked up the specs for the lb edition and it does indeed show good tolerance of low output impedance to +24dB so either his is defective, something in the supply is preventing full output swing or the specs are false. |
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Post by Johnkenn on Sept 8, 2018 22:16:42 GMT -6
I - for one - don't believe this thing is underpowered.
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Post by jampa on Sept 12, 2018 4:58:22 GMT -6
The update was posted on his Facebook page shortly afterwards
"well here's the upshot. The bias pot was missing some solder. Once fixed and aligned correctly I got the typical +27dBu and +23 dBm max levels."
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Post by jin167 on Sept 12, 2018 5:26:00 GMT -6
at least it can be fixed then but that QC tho..
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Post by Calvin on Sept 12, 2018 14:34:27 GMT -6
at least it can be fixed then but that QC tho.. Can't tell a thing about QC by a single report of a bad solder connection. We have no idea what the history of that particular unit is, or how many other folks are reporting similar issues. I wouldn't hesitate for a second to purchase this unit if that's what I had my eye on. |
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Post by jazznoise on Sept 13, 2018 5:11:09 GMT -6
The update was posted on his Facebook page shortly afterwards "well here's the upshot. The bias pot was missing some solder. Once fixed and aligned correctly I got the typical +27dBu and +23 dBm max levels." Hah. So there you have it. Should have read the manual before he posted! |
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