[dogn4u]

Just curious; I'm covered for a good phono pre, just curious why i couldn't run my phono thru my Langevin DVC. This two-channel preamp is what I use to record vocals and acoustic guitar. I specifically wanted a high end, solid state unit, since so much of my signal chain is already tube, I wanted one piece with the crispness and massive headroom that only MOSFETs can deliver...and got it in spades. Some of you who know your pro audio may be familiar with the Manley line of top shelf tube equipment; EQs; pres; compressors; channel strips. Great stuff, made right up the road in Chino. Or Fresno. I forget.

So my signal runs from a Blue Bottle mike through the Langevin to an ART Pro VLA II tube leveling amplifier (compressor/limiter) out to my Alesis MasterControl and to the hard drive via firewire and SONAR 7.

24/88.2 all the way; especially the bigger word length makes a huge difference in quiet passages and high end...but sure eats up space. A multitrack master before mixdown can take up 3-4 Gb, while the stereo master (still hi-res) about 100-200 Mb. Good sound, though, for digital. Hee hee.

So before I got my TT pre, I put a pair of RCA-1/4" adapters on the TT and plugged it in. Nothing. Nada. Zip. Zilch. I've plugged in many things thsi way and know the cables are good. What gives? Shouldn't it boost whatever you ask it to? Any one else ever try using a regular preamp for a phono stage?

Peace
Rudi

[dogn4u]

Originally Posted by dogn4u

Just curious; I'm covered for a good phono pre, just curious why i couldn't run my phono thru my Langevin DVC. This two-channel preamp is what I use to record vocals and acoustic guitar. I specifically wanted a high end, solid state unit, since so much of my signal chain is already tube, I wanted one piece with the crispness and massive headroom that only MOSFETs can deliver...and got it in spades. Some of you who know your pro audio may be familiar with the Manley line of top shelf tube equipment; EQs; pres; compressors; channel strips. Great stuff, made right up the road in Chino. Or Fresno. I forget.

So my signal runs from a Blue Bottle mike through the Langevin to an ART Pro VLA II tube leveling amplifier (compressor/limiter) out to my Alesis MasterControl and to the hard drive via firewire and SONAR 7.

24/88.2 all the way; especially the bigger word length makes a huge difference in quiet passages and high end...but sure eats up space. A multitrack master before mixdown can take up 3-4 Gb, while the stereo master (still hi-res) about 100-200 Mb. Good sound, though, for digital. Hee hee.

So before I got my TT pre, I put a pair of RCA-1/4" adapters on the TT and plugged it in. Nothing. Nada. Zip. Zilch. I've plugged in many things thsi way and know the cables are good. What gives? Shouldn't it boost whatever you ask it to? Any one else ever try using a regular preamp for a phono stage?

Peace
Rudi

and ps - the reason I mention Manley is that Langevin is what Manley named their solid atate line. Got it?

[Arny Krueger]

"dogn4u" wrote in message


Just curious; I'm covered for a good phono pre, just
curious why i couldn't run my phono thru my Langevin DVC.

So before I got my TT pre, I put a pair of RCA-1/4"
adapters on the TT and plugged it in. Nothing. Nada. Zip. Zilch. I've
plugged in many things this way and know the cables are
good. What gives? Shouldn't it boost whatever you ask it
to? Any one else ever try using a regular preamp for a
phono stage?

You should have gotten some kind of sound, but it should have sounded very
messed up due to the lack of RIAA equalization which roughtly amounts to a
6 dB/octave roll-off with a kink in the middle.

[Trevor Wilson[_3_]]

dogn4u wrote:
Just curious; I'm covered for a good phono pre, just curious why i
couldn't run my phono thru my Langevin DVC. This two-channel preamp is
what I use to record vocals and acoustic guitar.

**BZZZZZZZTTTT!

You need RIAA equalisation for a phono preamp. You also don't mention
whether you are using a moving magnet, or a moving coil (low output) phono
cartridge. MC carts require further amplification, as well as RIAA
equalisation.

I specifically
wanted a high end, solid state unit, since so much of my signal chain
is already tube, I wanted one piece with the crispness and massive
headroom that only MOSFETs can deliver...and got it in spades.

**What a load of ********. MOSFETs are not specifically capabloe of higher
headroom than any other output device. Headroom is, OTOH, directly related
to the regulation of the power supply. Well regulated power supply = low
headroom and poorly regulated power supply = high headroom.

BTW: Compare your fancy, shiny new MOSFET amp to a Phase Linear 700b (BJT)
sometime. Be prepared to be surprised.



--
Trevor Wilson
www.rageaudio.com.au

[Trevor]

"Trevor Wilson" wrote in message
...
BTW: Compare your fancy, shiny new MOSFET amp to a Phase Linear 700b (BJT)
sometime.

He'd have to find one that still works first :-)

[David Nebenzahl]

On 5/5/2011 2:31 PM Trevor Wilson spake thus:

dogn4u wrote:

Just curious; I'm covered for a good phono pre, just curious why i
couldn't run my phono thru my Langevin DVC. This two-channel preamp
is what I use to record vocals and acoustic guitar.

**BZZZZZZZTTTT!

You need RIAA equalisation for a phono preamp. You also don't mention
whether you are using a moving magnet, or a moving coil (low output) phono
cartridge. MC carts require further amplification, as well as RIAA
equalisation.

A useless point here, MM vs MM.

If the O.P. is that clueless about needing equalization, chance are slim
to none that they have a moving-coil audiophool cartridge (and Slim just
left town). Don't know why folks always bring this up. The problem is
just no RIAA here.


--
The current state of literacy in our advanced civilization:

yo
wassup
nuttin
wan2 hang
k
where
here
k
l8tr
by

- from Usenet (what's *that*?)

[geoff]

David Nebenzahl wrote:
On 5/5/2011 2:31 PM Trevor Wilson spake thus:

dogn4u wrote:

Just curious; I'm covered for a good phono pre, just curious why i
couldn't run my phono thru my Langevin DVC. This two-channel preamp
is what I use to record vocals and acoustic guitar.

**BZZZZZZZTTTT!

You need RIAA equalisation for a phono preamp. You also don't mention
whether you are using a moving magnet, or a moving coil (low output)
phono cartridge. MC carts require further amplification, as well as
RIAA equalisation.

A useless point here, MM vs MM.

If the O.P.

Semi-useless point. If it's an MC cartridge, then doing the EQ in software
is even more unsatisfactory that doing it that way for a (higher output) MM
cartridge.

geoff

[Randy Yates]

On 05/06/2011 11:48 AM, David Nebenzahl wrote:
[...]
l8tr

Even that's illiterate: "l eight tr"? Better "l8r".
--
Randy Yates % "So now it's getting late,
Digital Signal Labs % and those who hesitate
% got no one..."
http://www.digitalsignallabs.com % 'Waterfall', *Face The Music*, ELO

[David Nebenzahl]

On 5/6/2011 7:44 PM geoff spake thus:

David Nebenzahl wrote:

On 5/5/2011 2:31 PM Trevor Wilson spake thus:

dogn4u wrote:

Just curious; I'm covered for a good phono pre, just curious
why i couldn't run my phono thru my Langevin DVC. This
two-channel preamp is what I use to record vocals and acoustic
guitar.

**BZZZZZZZTTTT!

You need RIAA equalisation for a phono preamp. You also don't
mention whether you are using a moving magnet, or a moving coil
(low output) phono cartridge. MC carts require further
amplification, as well as RIAA equalisation.

A useless point here, MM vs MM.

If the O.P.

Semi-useless point. If it's an MC cartridge, then doing the EQ in software
is even more unsatisfactory that doing it that way for a (higher output) MM
cartridge.

Butbutbut ... you cut out the crucial part: It's not gonna *be* a MC
cartridge. Odds are 99,999 to 1 against it.


--
The current state of literacy in our advanced civilization:

yo
wassup
nuttin
wan2 hang
k
where
here
k
l8tr
by

- from Usenet (what's *that*?)

[Trevor Wilson[_3_]]

David Nebenzahl wrote:
On 5/5/2011 2:31 PM Trevor Wilson spake thus:

dogn4u wrote:

Just curious; I'm covered for a good phono pre, just curious why i
couldn't run my phono thru my Langevin DVC. This two-channel preamp
is what I use to record vocals and acoustic guitar.

**BZZZZZZZTTTT!

You need RIAA equalisation for a phono preamp. You also don't mention
whether you are using a moving magnet, or a moving coil (low output)
phono cartridge. MC carts require further amplification, as well as
RIAA equalisation.

A useless point here, MM vs MM.

**You mean: MC vs. MM.

And no, it is far from a useless point. Neither of us knows what kind of
cart is being used. It is more likely to be a MM, but it could be an MC,
thus compounding the problem. Given the knowledge imparted by the OP we need
to examine all possible parts of the problem.


If the O.P. is that clueless about needing equalization, chance are
slim to none that they have a moving-coil audiophool cartridge (and
Slim just left town).

**Nope. I agree that an ME is less likely though. The OP may have snagged an
eBay 'bargain' with an unknown cart fitted. I've seen it many times.

Don't know why folks always bring this up. The
problem is just no RIAA here.

**That is certainly the major part of the problem.


--
Trevor Wilson
www.rageaudio.com.au

[Trevor Wilson[_3_]]

Trevor Wilson wrote:
.. I agree that an ME is less likely though.

**That would be 'MC' of course.


--
Trevor Wilson
www.rageaudio.com.au