Odd Cable Behavior:

Inspector #20

Inspector #20

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Got a cable that makes noise when you tap it. No buzz, no hum, nothing like that, but the cable seems like it's "alive" in that if you bump it anywhere along it's length, it will amplify the 'bump.' I have other cables, so this is not a problem, but I am just curious if anyone has experienced anything like this??? It has nothing to do with the ends, the cable is 'microphonic' along it's entire length and it's a Mogami with Neutrik ends....
 
Have not experienced anything like that, is the cable new or older? either you might have got got a dud or its just done its time.
 
Robert Herndon said:
Got a cable that makes noise when you tap it. No buzz, no hum, nothing like that, but the cable seems like it's "alive" in that if you bump it anywhere along it's length, it will amplify the 'bump.' I have other cables, so this is not a problem, but I am just curious if anyone has experienced anything like this??? It has nothing to do with the ends, the cable is 'microphonic' along it's entire length and it's a Mogami with Neutrik ends....
Click to expand...

But you can see from the specs that W2893 has the lowest microphonic noise rating compared to W2534.
Yes it's normal for a cable on a tube amp. Depending on how it's wired, what type of cable.
There are certain Mogami cables that are anti microphonic.
Basically anything connected to the grid of a preamp tube will be microphonic and it's normal. Including the coupling caps in the circuit...
When the wire has more capacitance per foot it probably makes it less microphonic. But yeah the grid of a tube is way sensitive like an antenna.

Neglex Quad Microphone Cables
Mogami Neglex quad cable is perfect cable for home studios suffering from wiring and grounding problems. Mogami 2534 should also be used where intense RFI interference is a problem. Mogami 2534 provides an improvement in signal to noise of 10-20db over equivalent twisted pair cables. Double conductors quad cables are more effective in canceling noise that can get past even the best of shields and is critical in an environment of high RF and EM interference.



  • Conductor insulation is XLPE ( Cross-Linked Polyethylene) which has excellent electrical characteristics and prevents shrink-back during soldering.
  • Served (spiral) Bare Copper Shield is superior to foil or braided shields for sound quality and simplifies termination.


Part No. W2534

Neglex Quad Microphone Cables


Reference Standard NEGLEX Quad High Definition Microphone Cable
NEGLEX No. W2534 has become popular around the world as the standard for high quality digital and analog recording. The cable has also become popular for use with unbalanced equipment, such as high quality pre-amp, amp inputs and tape decks. Miniature Quad Superflexible Microphone Cable Originally designed for BANTAM patch-cords, this cable has become popular where a small diameter Quad mic cable is required.





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SPECIFICATIONS

Configuration
Mogami Cables Configuration w2534
Mogami Cables Configuration w2893
Part No.
W2534​
W2893​
No. of Conductor
4(Quad)​
ConductorDetails
20/0.12 OFC​
30/0.08 OFC​
Size(mm²)
0.226mm² (#24 AWG)​
0.15mm² (#26 AWG)​
InsulationOv. Dia.(mm)
1.6Ø (0.063")​
1.0Ø (0.039")​
Material
XLCPE (Cross-Linked Polyethylene)​
Colors
Blue / Clear (Quad)​
Black / Red / Blue / Clear​
Served Shield
Approx. 64/0.18A​
Approx. 73/0.12A​
JacketOv. Dia.(mm)
6.0Ø (0.236")​
4.8Ø (0.189")​
Material
Flexible PVC​
Flexible PVC​
Colors
10 colours available​
5 colours available​
Roll Sizes
50m (164 Ft)
100m (328Ft)
200m (656Ft)​
50m (164 Ft)
100m (328Ft)
200m (656Ft)​
Weight per 200m Roll
11kg​
7.5kg​


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ELECTRICAL & MECHANICAL CHARACTERISTICS

Part No.
W2534​
W2893​
DC Resistance at 20°CInner Cond.
0.083Ω/m(0.025Ω/Ft)​
0.13Ω/m(0.040Ω/Ft)​
Shield
0.012Ω/m(0.0037Ω/Ft)​
0.025Ω/m(0.0076Ω/Ft)​
Capacitance at 1kHz, 20°C
(Partial C. Value)
See below figure*		K0
65pF/m(20pF/Ft)​
74pF/m(23pF/Ft)​
K1
13pF/m(4pF/Ft)​
11pF/m(3.4pF/Ft)​
K2
4pF/m(1.2pF/Ft)​
3pF/m(0.9pF/Ft)​
Balanced
Quad
Connection		Cond.-Cond.
97pF/m(29.6pF/Ft)​
131pF/m(40pF/Ft)​
Cond.-Shield.
110pF/m(33.6pF/Ft)​
178pF/m(54pF/Ft)​
Inductance between conductors at 1kHz. 20°C
0.4µH/m(0.12µH/Ft)​
0.5µH/m(0.15µH/Ft)​
Electrostatic Noise**
50mV Max.​
50mV Max.​
Electromagnetic Noise**
0.15mV Max.​
0.15mV Max.​
Microphonics at 50KΩ/ Load**
430m V Max.​
30m V Max.​
Voltage Breakdown
Must withstand at DC 500V/15sec.​
Insulation Resistance
100000 M Ω/ × m Min. at DC 125V, 20°C​
Flex Life**
11,000 cycles​
26,000 cycles​
Tensile Strength
686N​
500N​
Emigration
Non-emigrant to ABS​
Non-emigrant to ABS​
Applicable Temperature
-20°C‾ +70°C(-4°F‾ +158°F)​
** Using standard testing methods of Mogami Wire & Cable Corp.* Partial Capacitance
mogami diagram w2893
 
Last edited:
Robert Herndon said:
The only bad cables I've ever had have been Mogami...
Click to expand...

Crazy. Have never heard of one even going bad over time.

That being said, I prefer George L's to all others. They are the only cables I've ever used that provide noticeably better sound (and what I mean by that is I think they are the most transparent). I've never noticed a difference in sound with any other brand.
 
gball said:
Crazy. Have never heard of one even going bad over time.

That being said, I prefer George L's to all others. They are the only cables I've ever used that provide noticeably better sound (and what I mean by that is I think they are the most transparent). I've never noticed a difference in sound with any other brand.
Click to expand...

The George L's are fantastic. I started using Monoprice Quad-Path cables after experiencing them at Capitol working as a per-diem. Never had a problem with them.

Go Figure!!!!
 
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