Harpsichord on Youtube

http://www.youtube.com/watch?v=71x4MSlpGUk

Joachim

***The frequency is depended of the length of the soundboard and is well above 10KHz. I found this info in a book from Neville Fletcher.
See table 11.10 on page 344.

http://books.google.de/books?id=9CRSRYQlRLkC&pg=PA343&lpg=PA343&dq=frequency+of+a+harpsichord&source=bl&ots=RqbdiL1kfl&sig=ltO1pJBOK7V0uAe4rkS3QGtdtgc&hl=de&sa=X&ei=1dAzVOqmNKGfygPvlIH4Cg&ved=0CEMQ6AEwAw#v=onepage&q=frequency%20of%20a%20harpsichord&f=false
***

Hi Mani,

In the latest German paper "hifi & records" the content of an article is about room modes. In general - with freqencies up to appr. 300Hz "The room is in control" and above "The loudspeaker is in control".

You will find more informations under the keyword "Schroeder frequency equation" in the net.

Paul has a very special room.

Joachim

***see also
http://www.amazon.com/Sound-Reproduction-Acoustics-Psychoacoustics-Loudspeakers/dp/0240520092

Great!!!!
**This is a 75 Ohm connection. Do you have details about the future cable, 93 Ohms? The SQ is?**

I saw this coming and now? 

..... it's time for an external PSU, and then the NOS1a goes back to the Netherland for the next revision "B"!?!

Joachim

Hi,

the cable is from H + S, type K_02232 T and is not in production anymore. From the datas we can see the construction.

The "D" in the table is for "double braid screen", the "K" for "high temperature", and that cables have a double screen always at H+S.

Joachim

Hi Gary,

The cable is identical to Brians RG142 ("Solid Silver-coated Copper Clad Steel Conductor"), see Reply #100 http://www.phasure.com/index.php?topic=3026.msg32357#msg32357

Joachim

Hi,

interesting.

I heard with Nordost Valhalla and Entreq RCA's before, and changed the NOS1a to poweramp connection only, nothing else.

The prices of the Palladium are appr. 15% above the Valhalla's.

Joachim

http://www.positive-feedback.com/Issue20/silversmithpalladium.htm

Didn't you order RG223?

Joachim

Hi Peter,

shipping costs are? 25$ ?

Joachim

Hi Brian,

I do use an identical type cable to the RG142 with copper coated steel strands and the SQ is great. Let's see (hear) what the RG223 is emerging.

Joachim

This cable (double shielded) is Roberts proposal and it seems to be the best choice.

http://www.l-com.com/coaxial-rg223-coaxial-cable-bnc-male-male-50-ft

Joachim

Hi,

Interview and two videos about cables from a technical aspect:

http://www.audioholics.com/gadget-reviews/speaker-cable-and-audio-interconnects

Joachim

Continuation from Reply # 8  after listening sessions from today (with variation C):

1)   Better 3D-image of the recording studio/concert hall
2)   Better definition/resolution (tone colour/timbre) of all instruments and voices. The “refined” timbre is AMAZING!!!
3)   Bass not that “tight” anymore (or “nearer to live”?)
4)   Off axis listening again possible

Test CD’s:

- “Touch” from Yello (a lot of bass)
- “M²” from Marcus Miller (a lot of bass)
- “Kind Of Blue” From Miles Davis (brass instruments)
- “Tenderness” from Al Jarreau
**“The Chick Corea Songbook“ from The Manhatten Transfer**

This is the best SQ I ever heard in my room.

If some of the NOS1a owners has the chance to test this combination it is worth an test attempt.

Joachim

P.S. Our audio system is connected to the mains without any refinement.

Hi Peter,

A) Laptop tested with a full loaded battery only, no connection the power distributor.

B) Laptop tested with a full loaded battery, power supply transformer AC/DC (220V/12V) connected to the power distributor (and laptop). (Battery Through Mode)

C) battery removed from the laptop, power supply transformer AC/DC (220V/12V) connected to the power distributor (and laptop).


Joachim

Edit:
Version "A" should produce the best SQ and "B" the second best. (acc. to my Dartzeel experience)

EDIT II: After listening through last night, the best SQ creates  choice/alternative  C)

Hi Peter,

A)   Stumbling over the article about the BNC cable I tried to test that cable due to the immediate availability within my spares. Let’s say, this was an “accident”.

B)   With your modifications of the NOS1 to the NOS1a and your remark/hint to the laptop and my experience of a superior SQ with the battery driven Dartzeel preamp the idea came to test the laptop route.

C)   My room with the unfavourable speaker placement is my reference environment and I can hear differences (under this same conditions).

D)   The audio configuration I’m using is very simple. Laptop with USB connections to the mouse, NOS1a and an external hard disk. No tablet. The USB connections are not enhancing the pre-conditions for a good SQ. (XXH using in “attended mode” and with “**8x** ArcPrediction”  **on the PC + laptop** all the time)

E)   The SQ with the laptop is not altering noticeable when driven in “battery mode” or without battery. The conclusion is, the 12Volt “power supply” of the laptop is the key benefit for a better SQ.

F)   The laptop has not the performance of a PC by design but with the NOS1a the result is amazing. The processor load is very small (23% of 1,0 Ghz) and increasing a little bit during the data transfer naturally.


So happy listening in the late afternoon today.


Joachim

EDIT:

The USB cable to the NOS1a is a "data transfer only" type.

Report continued from Reply #2

The Laptop is working with XXH now ………… and I will confirm Jud impressions.
The SQ is very near to live impressions.

I have never heard such drums and voices in my room.
Jimmy Hendrix is live on stage with “All Along The Watchtower”
The distance between Beady Bell and Jamie Cullum on stage is now appr. 2m, with the PC it is appr. 0,05m on the track “Intermission music”. ( http://www.amazon.co.uk/Belvedere-Beady-Belle/dp/B0012K5PX4/ref=sr_1_8?s=music&ie=UTF8&qid=1411057693&sr=1-8&keywords=beady+belle)

1)   The “colours” of the drumset (cymbals, Tom Toms) are very good to distinguish.
2)   Kick drums are better than with a PC.
3)   Bass “sound volume” is less.

The complete audio chain plus the listening rooms are full of compromises, and the 12Volt driven laptop seems at present the best choice for a better SQ.

The consequence is, the power supply/transformer of the PC has to be removed into a separate housing/case.

If there is a chance for you to install XXH on a laptop it is worth a test.

My laptop is from 2011 and the sound is great/amazing!!

Joachim


EDIT I:
With the SQ of the laptop I do have more and more the impression that I have to adjust the speaker placement. But when ………. my next sleeping place is in the barn.

Edit II: Jud found a wonderful description what comes to our ears with the laptop. Voices are great. Sammy Davis jun. sings just live in the living room.