Apogee Duet Monitors/Speakers

Hi,

I've recently just purchased the Apogee Duet. When it comes to adding output monitors to the break-out cable, do the monitors/speakers require an amplifier or will the Apogee Duet take care of that, i.e via it's preAmp?

Thanks.

MBP 17" C2D, Mac OS X (10.5.2)

Posted on Apr 9, 2008 8:37 AM

Reply
39 replies

Apr 11, 2008 3:52 PM in response to David Robinson9

David Robinson9 wrote:
hi again,
XLR tranformer balanced,
and
TS "audiophile" unbalanced.
most of the time, the "audiophile" out sounded cleaner and punchier.
DR9.


to be clear about connection impedances

XRL connectors comes with a standard professional LOW-Z 600 Ohm inpedance
TS Line connectors requires High ZI impedance...

http://en.wikipedia.org/wiki/Impedance_matching

if you connect a Line High ZI in a XLR Input (or viceversa) you are in wrong connection....
the frequency response will gives you a BAD sound.. you can use Neve, Universal Audio or the better Analog bilion dollars value gear... but you always get a big "fake sound"

This is not related with output +4 or -10 Db features!!!!
Obviously, the cable connection must have a perfect matched for your system

I repeat the point.

+4db OUT is the professional standard.
-10db out is consumer standard for Home, iPod, Hifi system.

Apogee Duet gives a great sound.. but cannot be used (my opinion) in a professional production as a Main Output interface...
otherwise it can be used for professional recording!

It is a great Firewire RECORDING INTERFACE! (-10db output was a small disappointment for me)

G

Apr 18, 2008 6:59 AM in response to eric55418

There is some misunderstanding in Balanced/UNbalacend connection!

I try to clarify the point

Balanced cables are the MUST for Microphones connection!!!
But, after preamp Balanced cables are not so important!!!

I never talk about Balanced cables because the connection fron MIxer/preamp to Power Amplifire is not so wrong...

I suggest to do a symple test:

1) Turm ON your Active monitors without any cable connected
2) switch to +4dBu sensitivity... (Close your ear to the tweeter... you will be able ti listen the noise...)
3) switch to -10dBu sensitivity... (Close your ear to the tweeter... you will be able ti listen the noise...)

with the point (3) you will ear very big noise increase!!!

this is not related with Balanced cables!!!
this is mathematics limit of -10dBu Output/Input and it is not depending from the cables...
There is no need to use balanced cables to connect a mixer to a power amplifier bacause the impedance after preamp is not so critical!!!

SO,
Forget Balanced cables... they must be used only for Microphones!!!

you can use unbalanced cables for connect your active monitors...
the Noise will be rise if you set the monitors for receive -10dbu in any case!!!
There are rules of Mathematics and Physics that can not be circumvented
We are talking about Analog Audio Amplifier.... 😉

Apr 18, 2008 7:26 AM in response to cbtlr

I'm sure of that... (but also Motu, Digi002/3. Metric Halo, and others)

Sound is good but with-10dBu you got MAX 60/70 db dynamic range because this is the physical limit for Analog Amplifier... (that's why a said that it is a not professional output sensitivity)

read the specification of Rosetta 200 or Universal Audio 2192:
they gives + 26dBu OUTPUT!!!

Apr 18, 2008 5:28 PM in response to David Robinson9

The "PRO" term should be understood as a synonym

David Robinson9 wrote:
hi,
the output of a device does not make it pro.
i have a mixer custom designed by Avalon Audio.
it outputs well over +30dBu and needs it's own 40volt power supply.
so, i guess, using your analogy, this is "more pro" the my rosetta?


and my answer about your question is

YEAH!!!

Avalon sounds is more beautiful 🙂

in any case + 26 or + 30dBu are the standard professional for be sure to use All theoretical 120 dB dynamic range of class A Analog Power amplifier

there is another way to explain my point...

the differnce between - 10dBu and +4 dBu OUT level could be comparable to a digital audio resolution of 16 bit (-10dBu) or 24 bit (+4dBu) ..... your Avalon should be like as a 32 float point bit dynamic range resolution.

believe me... I know what I'm talking about

😉

Apr 19, 2008 1:57 AM in response to marceldada

marceldada wrote:
In that case I guess I should can the Duet and go back to my Soundblaster Live since it has SPDIF (so it's pro) and therefore more dyanamic range. Thanks for the heads up.


ther are many Active Monitors speaker with optical or spdif input...
you can use also your internal mac card for be able to use full dynamics range..

... and you forget the fantastic inputs and preamp section of the Duet.

Apogee duet is a great recording interface.. I just talk about that.... read my previous post about duet....

(I never used SoundBlaster Live but should be comes with serious Clock-Jitter limitation)
For use Digital OUTs in a "PRO" environment you must have a a Jitter free Master clock device like the UA 2192 (or at least a Motu 828mK3, digi, RME).. after that you can use all your digital INs and OUTs in a professional way... except the Duet because it cannot be "clocked" with any device and cannot be use the Mac OS X aggregate device feature, that should be another way to use its clock as master clock!

this is another restriction of the Duet... (it must comes with some limitation because should be no reason to buy rosetta 200 if Duet restrictions disappears)

in any case the Duet is a very good interface with a great sound!

G

Apr 19, 2008 2:27 PM in response to marceldada

Sorry for that, but...
I never knew anything about SoundBlaster Live... it is a new MacDonald Hamburger type???

... never mind

Thanks for your help 😉

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