| Author |
Message |
hank alrich
Guest
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 Posted:
Mon Oct 31, 2005 9:34 pm Post subject:
Re: 48 v phantom power to 9 v circuit |
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Geoff@home wrote:
| Quote: | "Paul Stamler" wrote:
Any electric guitar or bass. 1M is minimum, and on a lot of pickups
you can tell the difference in sound between 1M and 10M. With a 1M input
on a DI, musicians will often claim that having the DI in circuit changes
the sound of the stage amp (because it halves the impedance the pickup
sees in a typical case).
I'll give you another example of something that needs a 10M input
impedance:
a piezo pickup. They sound somewhat less like dog crap with a very high
load
Z. Sort of going from worse to bad.
So what devices have you seen with a 10M Z-IN ?
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Evil Twin, GTQ2, Baggs PADI.
--
ha
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hank alrich
Guest
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| Posted:
Mon Oct 31, 2005 9:34 pm Post subject:
Re: 48 v phantom power to 9 v circuit |
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Pooh Bear wrote:
| Quote: | hank alrich wrote:
Pooh Bear wrote:
Can you suggest an example where 10M input Z is required ?
For whatever reasons, the very best DI's I have used have an input
impedance in that range.
Sounds to me like overkill.
I can't actually imagine where anything over 1M would be needed.
|
Imagine what you will. When the sound meets my ear I tell you what I
think of it. I have direct experience with a few of these boxes. I
report what I hear, as a recordist, an SR mixer, and as a player of a
few different string instruments. I can hook up a passive Jensen DI with
about 200K input impedance, a GR MP2-MH with about 500K, an Alembic F2B
with a megohm, and the GTQ2 and Evil Twin with 10 Megohms. All of those
work reasonably well with electromagnetic sources. The last two allow
piezos other than the K&K Pure Western system I have in one instrument
to sound tolerable. The K&K does something different inside it and
sounds quite good with a range of devices, but usually having at least
the one megohm you suggest.
Piezos want really high input impedances. I've read more than once
somebody's technical treatise about why one megohm should be sufficient.
I'll believe that when I hear it, and not before.
--
ha |
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Paul Stamler
Guest
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| Posted:
Tue Nov 01, 2005 12:34 am Post subject:
Re: 48 v phantom power to 9 v circuit |
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"Geoff@home" <geoff@nospam-paf.co.nz> wrote in message
news:Mam9f.3892$S24.244638@news.xtra.co.nz...
| Quote: |
"Paul Stamler" <pstamlerhell@pobox.com> wrote in message news:DPj9f.9833
Any electric guitar or bass. 1M is minimum, and on a lot of pickups
you can tell the difference in sound between 1M and 10M. With a 1M
input
on a DI, musicians will often claim that having the DI in circuit
changes
the sound of the stage amp (because it halves the impedance the pickup
sees in a typical case).
I'll give you another example of something that needs a 10M input
impedance:
a piezo pickup. They sound somewhat less like dog crap with a very high
load
Z. Sort of going from worse to bad.
So what devices have you seen with a 10M Z-IN ?
|
Acoustic guitar preamps (which is an oxymoron, but never mind). Typically
they'll use a FET input.
Peace,
Paul |
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Phil Allison
Guest
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| Posted:
Tue Nov 01, 2005 5:42 am Post subject:
Re: 48 v phantom power to 9 v circuit |
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"hank alrich"
| Quote: |
So what devices have you seen with a 10M Z-IN ?
Evil Twin, GTQ2, Baggs PADI.
|
** The Fender amp called "The Twin" ( aka Evil Twin) does not have a 10
Mohms input resistance.
Like all fender tube amps it is 1 Mohms.
.......... Phil |
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John L Rice
Guest
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| Posted:
Tue Nov 01, 2005 5:42 am Post subject:
Re: 48 v phantom power to 9 v circuit |
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"Phil Allison" <philallison@tpg.com.au> wrote in message
news:3so8upFoqsvbU1@individual.net...
| Quote: |
"John L Rice"
"Phil Allison"
"hank alrich"
So what devices have you seen with a 10M Z-IN ?
Evil Twin, GTQ2, Baggs PADI.
** The Fender amp called "The Twin" ( aka Evil Twin) does not have a 10
Mohms input resistance.
Like all fender tube amps it is 1 Mohms.
Eclair Engineering...
** Funny way to spell "Fender" ??
......... Phil
|
Oh, sorry if I misunderstood. I thought you were saying that the Evil Twin
DI was designed by Fender at one point or modeled after a Fender amp or
something.
Never mind.
--
John L Rice
www.DeliriumFix.com |
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Phil Allison
Guest
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| Posted:
Tue Nov 01, 2005 5:42 am Post subject:
Re: 48 v phantom power to 9 v circuit |
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"John L Rice"
| Quote: | "Phil Allison"
"hank alrich"
So what devices have you seen with a 10M Z-IN ?
Evil Twin, GTQ2, Baggs PADI.
** The Fender amp called "The Twin" ( aka Evil Twin) does not have a 10
Mohms input resistance.
Like all fender tube amps it is 1 Mohms.
Eclair Engineering...
|
** Funny way to spell "Fender" ??
.......... Phil |
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John L Rice
Guest
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| Posted:
Tue Nov 01, 2005 5:42 am Post subject:
Re: 48 v phantom power to 9 v circuit |
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"Phil Allison" <philallison@tpg.com.au> wrote in message
news:3snpqvFp95tpU1@individual.net...
| Quote: |
"hank alrich"
So what devices have you seen with a 10M Z-IN ?
Evil Twin, GTQ2, Baggs PADI.
** The Fender amp called "The Twin" ( aka Evil Twin) does not have a 10
Mohms input resistance.
Like all fender tube amps it is 1 Mohms.
......... Phil
|
Eclair Engineering doesn't seem to have it's own website so I don't know if
this site is listing the specs accurately or not. But FWIW they list the
Evil Twin as having a 10 Meg ohm input impedance:
http://www.marquetteaudiolabs.com/eclair.html
--
John L Rice
www.DeliriumFix.com |
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