Why did Mc choose Lyngdorf Room Perfect instead of...

[Jerome W]

Originally Posted by Face

The RP1 has the same issue, the DPA-1(preamp/processor) appears that it may not.

Sorry,

RP1 has not the same issue than the MEN220 and has fully balanced inputs AND outputs. I had the XLR outputs tested to be sure and they are OK :
Ground / + / -

[Masterlu]

Perhaps OT, but after living with the MX150 & RoomPerfect for a few months I can say, this processor is awesome. I am thoroughly pleased and it has exceeded all my expectations.

(which were quite high)

[schaefer11]

Originally Posted by TommyC

Doesn't Audyssey attempt to flatten frequency response curve of the room whereas RoomPerfect doesn't.

So after an Audyssey calibration, speakers of different brand will sound more or less the same due to a flattened curve. On the other hand, PR leaves the natural response curve of the speakers alone and attempts to remove room anomalies.

This is my understanding of these technologies.

I believe that all room correction devices manipulate the frequency response of the speaker and try to match it to a "house curve". It is the manner in which they manipulate the frequency response and the shape of the "house curve" that may differ.

[Kal Rubinson]

Originally Posted by schaefer11

I believe that all room correction devices manipulate the frequency response of the speaker and try to match it to a "house curve". It is the manner in which they manipulate the frequency response and the shape of the "house curve" that may differ.

Yes, but for most modern ones, the FR is not the primary target. They address the time decay of the sounds because these are greatly affected by room acoustics and position. In fact, some, such as Meridians MRCm adjust the FR only incidentally.

[howiebrou]

Originally Posted by Kal Rubinson

Yes, but for most modern ones, the FR is not the primary target. They address the time decay of the sounds because these are greatly affected by room acoustics and position. In fact, some, such as Meridians MRCm adjust the FR only incidentally.

Great to see a Meridian Aficionado chipping in. I agree that a FR is not the ultimate goal unless you want boring sound. Meridian's relatively mild corrections work a treat

howie

[schaefer11]

Originally Posted by Kal Rubinson

Yes, but for most modern ones, the FR is not the primary target. They address the time decay of the sounds because these are greatly affected by room acoustics and position. In fact, some, such as Meridians MRCm adjust the FR only incidentally.

Kal,

I am sure you are correct, you have much more expertise in this area than I ever will. But, it seems to me that almost all of the room correction companies make a very big deal out of the smoothing and extending of the frequency response (especially in the bass) and matching a target curve. So even if that is a secondary result of their approach, your particular speaker is going to have a frequency response similar to all others. However, I don't agree with others that this will make all speakers sound the same since, as you point out, they are trying to correct for other anomaolies of the particular room and even after correcting, rooms are still going to sound different from one another, IMO.

[Face]

Originally Posted by C220MC275

Sorry,

RP1 has not the same issue than the MEN220 and has fully balanced inputs AND outputs. I had the XLR outputs tested to be sure and they are OK :
Ground / + / -

Sorry, you're incorrect.

Flemming Smith <XXX@lyngdorf.com> to MICHAEL <XXX@gmail.com>
3:15am


Hallo Mike,
Please be informed that the balanced connectors are with signal on the + pin only

We have learned that this can cause amplifiers of older designs to overheat !

Med venlig hilsen / Best regards,
Flemming Smith
Customer Service Manager
SL Audio A/S
S T E I N W A Y L Y N G D O R F
L Y N G D O R F A U D I O

Fra: MICHAEL [mailto:]
Sendt: 13. september 2010 20:12
Til: info
Emne: RP-1


Can you tell me if the RP-1 is fully balanced or not?

Thank you,
Mike

[Masterlu]

That was my understanding also on the RP1

[jdandy]

Originally Posted by Face

Sorry, you're incorrect.

Mike.......Here is an email that Jérôme forwarded to me from Lyngdorf. Jérôme and I had been questioning the RP-1 balanced output wiring scheme. Read the email from bottom to top.

Expéditeur: Leif Schmücker <lsc@steinwaylyngdorf.com>
Date: 10 août 2010 03:44:33 UTC-04:00
Destinataire: Jérôme Wanono <xxxxxxxxx@yahoo.fr>
Objet: SV: Tr : SV: SV: Technical question on RP1
Hi Jerome/Dan

Pls read my previous answer again 
I can assure you that nothing is inverted . .

Pin 1: signal ground (not signal minus or chassis ground).
Pin 2: signal plus (+)
Pin 3: signal minus (-)

And my comment was that we separate signal ground from chassis ground.
So when connecting the RP-1 with another product the two chassis are not connected.

Pls check in the ‘Input Connection’ menu that the input on the RP-1 is set correctly (is default set to ‘balanced’ but can be changed to ‘unbalanced’).

The only way the two chassis should be ‘connected’ is through the ground pin in the mains plug.
And you either connect none or all products in the signal chain to mains ground.
Otherwise you risk that differences in ground potentials (current) is flowing through the interconnects.

So, the pin connection in the RP-1 is in full compliance with the standard for balanced connections . . I guess we would also have heard something during the last couple of years had it been any different 
And you can use standard balanced XLR cable to connect the RP-1 to any amp with standard balanced XLR input.
We have never had a case with a mismatch.

Hope this clarifies the problem . . otherwise to let me know – OK?

Med venlig hilsen / Best regards,
Leif Schmücker

SL Audio A/S



Fra: Jérôme Wanono [mailto:xxxxxxxxx@yahoo.fr]
Sendt: 10. august 2010 04:16
Til: Leif Schmücker
Emne: Tr : SV: SV: Technical question on RP1

Hello again Leif,

This is the answer of my friend Dan to your message.
Your answers are very important to me cause I also use a truly balanced pair of monoblocks McIntosh amps ( 2301's) so if the pins are inverted on the Lyngdorf outputs compared to the Mc Intosh inputs, I could also be in trouble....

"
Jérôme,

It does seem Leif is telling you the RP-1 balanced output signal is a true balanced connection, but as I understand his comment pin #1 is signal cold (-). If that is the case, and pin #3 is the chassis ground, then the balanced connector wiring scheme is different than the balanced inputs on McIntosh amplifiers where pin #1 is chassis ground, and pin #3 is signal cold (-). If this is actually the case, then to make the RP-1 work properly with a McIntosh balanced amplifier the male end of a balance interconnect that feeds the McIntosh amplifier’s balanced input connector must have the wire swapped from pin #1 to pin #3, and from pin #3 to pin #1 in order for the signal cold (-) from the RP-1 to feed the proper pin on the amplifier.

I wish Leif had been specific about all three balanced pins functions, because his statement that pin #1 is signal cold (-) is contrary to the information printed in the Lyngdorf RP-1 owner’s manual. In the Technical Specifications section it shows pin #1 as ground, pin #2 as hot (+), and Pin #3 as cold (-). This configuration would mate perfectly with the McIntosh balanced input, but not so if the RP-1 balanced output signal has pin #1 as cold (-) and pin #3 as ground.


Best regards,
Dan "

Leif's answer seems to conflict with the information you have received, but since Jérôme had his Lyngdorf RP-1 balanced outputs tested, and confirmed to be a true balanced output, I would think that perhaps your information may be incorrect. I am not trying to start an argument, only providing the information that has been made available to me.

[Kal Rubinson]

Originally Posted by schaefer11

Kal,

I am sure you are correct, you have much more expertise in this area than I ever will. But, it seems to me that almost all of the room correction companies make a very big deal out of the smoothing and extending of the frequency response (especially in the bass) and matching a target curve.

I suspect that one gets this impression because they find it easier to emphasize this aspect as it is simpler for the general public to understand. Of course, it is a significant part of most roomEQs anyway.

Kal