I remember you well. One of the guys who implemented my cable advice and was happy with the results:
"Pass Lab 250.5 with Magnepan III's.
I replaced DIY 5 foot 16 AWG silver ladder line. Have previously used a variety of commercial Helix design, solid flat wire and braided multi-stranded wires insulated and in multiple sleeves. All 12 AWG, 5 to 8 foot length. Costs ranged from $400 to $2,000.
Dear b4icu57,
I purchased 25 feet of 0 AWG form a supplier on eBay for $45 ($12 shipping) and
four brass (supposedly gold plated) battery connectors ($7.49).
I constructed four five foot cables in just over one hour. Battery
connectors were converted to spades with a cold chisel and wire cutters, cable
was cut with a hacksaw and insulation stripped with the hacksaw. Spades
were connected to Pass Labs 250.5 terminals (PL does not supply banana plug
receptacles). I attached banana plugs to a two inch piece of silver
plated 8 AWG wire. I hollowed out a holle in 0 AWG wire with a punch and
did not remove insulation. I then inserted the stripped 8 AWG wire in
hole and secured the assembly with a hose clamp around the insulation at the
cable’s end.
The cables were attached to my thirty year old modified MG IIIa’s.
The results are stunning. The amount of
undistorted energy filling the room, is jaw dropping. I keep turning up
the volume to levels that previously irritated my ears, and experience no
irritation. In the modified lyrics of B.B. King, “The shrill is gone.”
My wife is hearing new detail in cuts she has listened to many times
before.
In my case, b4icu57, you were absolutely correct, thank you (except for
the part of you doubting ribbon speakers would be improved with installation of
your design). I can’t wait to try the cables in one of my other systems
that employs cone speakers.
I am sure every case is different. Nevertheless, I encourage other hobbyist
to test your theories.
Thank you for your generosity and patience.
All good wishes."
Well, Class-D, tend to have a Spec. of high to very high DF (Dumping Factor). It is in the thousands...
As DF is a representation of Ro (output Resistance) and equals to 8/Ro, a DF of 4000 (common to D-Class Amps) is 0.002 ohms.
If I compare it to your PASS Labs 250, with a DF of 150, it's Ro equals to:
0.053 ohms. In other words. it's 26 times lower Ro, of better DF !
How it is achieved:
D-Class is a high speed switching power device. It uses some H-FET or equivalent high power and very low ON resistance, between the power rails and the output. That's the DF or Ro are coming from.
For the Devialet 120 (replaced an older model called 110, and now they are at 140...) I'd found no Spec. regarding it's DF. I'll try to contact them later today to ask their technical support about the DF figure.
As It was on my last thread, it is also now (Physics didn't change), the higher the DF (same cables length) the importance of thick cables grows.
The other parameter that I use in my calculations, is the cable length.
I assume the length is the same: 6 ft.?