HIFI4ALL Forum: Erfaringer med Lyngdorf RoomPerfect

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greve
Forum Bruger

Bruger siden: 17 Februar 2006
Lokalitet: Sønderjylland
Status: Offline
Indlæg: 281

Sendt: 30 Juli 2006 kl. 15:27 \| IP-adresse registreret

Denne tråd kan bruges til at diskutere reelle erfaringer med Lyngdorf RoomPerfect rumkorrektion, modsat den anden tråd, der mere er meninger og forventninger end reelle erfaringer.

Jeg lægger ud med at kopiere de foreløbigt 2 indlæg jeg har skrevet på en dedikeret Lyngdorf usergroup:

Hi Andy and all others eagerly waiting for the first "real-life" RoomPerfect 
experiences.

Let me first say that the use of RP is my first experience with any room 
correction system, so you can call if a "room correction novice" view on the 
system.

First impressions are positive, but with some reservations. The measurement 
process is generally easy, but it seems difficult to get a high enough level for 
RP to measure successfully (manual states that it's fine to use a lower level, 
but in practice it doesn't seem to be like that).

I first tried the following system:
TDA2200 with RP driving Castle Richmond 3i (bookshelfs)
S2150 driving W210 (XO 200Hz)

With 4 or 5 measurements I got RoomKnowledge index above 90% and RoomCorrection 
index was around 45%. BUT, with RP active on the measured Focus Position the 
sound was thin and tinny and far worse than with RP on Bypass.

I then tried the following system:
TDA2200 with RP driving Castle Harlech S2 (floorstanders) and no W210 in at all.

With 4 measurements I got RoomKnowledge index above 90% and this time 
RoomCorrection index was only 13%. With RP active on the measured Focus Position 
the sound was clearly different from RP in Bypass and in my opinion also better 
than without RP. Some resonances were gone and the sound was simply better and 
"cleaner".

I now want to try to introduce the W210 back into the system with the 
floorstanders, but I was not able to get a high enough sound level for RP 
measurements. The S2150 displays 10dB higher than the TDA2200 (I presume this is 
due to the power differences) but TDA2200 needs to be at volume 82 for the RP 
measurements to succeed and this drives the S2150 into the volume ceiling and it 
stops at 87.9, which is then less than 10dB between the 2, hence not a 
representative setting.

Any input is welcome and more comments on my experiences will follow.

---

Hi

In addition to my previous post about my initial experiences, here follows some 
more notes from my fast-growing memory-bank of RP experiences.

I think I have now managed to get my head around the measurement setup. The 
manual states that mic location during measurements should be at "random 
location and orientation". I now believe that it's vital to keep the mic 
horizontal and not point it downwards or upwards, which I did in my first series 
of measurements (assuming that "random orientation" actually meant "random 
orientation" in all directions). Now that I keep the mic at same level and 
horizontal the results are far better than my first attempts.

Due to the experimentation I'm doing, I really miss a way to save one set of RP 
measurements for later reloading. E.g. when I want to try some other speakers or 
adding subs it would be real handy to have an easy way to come back to the 
previous RP setup - the way it is now, I have to redo measurements every time I 
change my system. This boils down to a general comment about RP: I'm missing the 
reproducability, i.e. being able to get back to a setup I know was working. RP 
presumably adjusts thousands of parameters automatically and I bet no 2 
measurements with the same setup will generate exactly the samt setting for all 
these parameters.

Anyway, now for the sound. I managed to get the W210 (on S2150) to work with the 
Castle Harlech S2 floorstanders (on TDA 2200). XO at 400Hz. The results were 
really good, although my wife thought there were slightly too much "bass boom" - 
I considered it spot on for my liking. The RoomCorrection index was as high as 
73% which I presume is because the lower frequencies had to be "corrected" quite 
a lot due to a high gain setting on the S2150 (I'm still experimenting with 
this).

One final comment relates to the use of the PC Pack software available for TDA 
2200 and TDA 2200+. I tried to connect to the TDA 2200+ with RP from the AmpCon 
and DSP software but I was not really able to do so (AmpCon could connect and 
display status but pressing "Setup" resulted in nothing - DSP was not able to 
get Product Type (was listed as "not known") hence the DSP tweaks were not 
possible). I guess the philosophy from Lyngdorf is that RP will take care of 
everything and there is no need for user-tweaks, but I feel that this will be a 
major limitation for many Lyngdorf users. Maybe I'm wrong and maybe it's just a 
matter of waiting for some software from Lyngdorf which enables DSP tweaking on 
RP equipped amps. Or maybe I'm doing something wrong - remember, this is my 
first experience with room correction and Lyngdorf products.

__________________
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