Grado Hum Database

[kermit z]

Grado Prestige Black w/ LP Gear Audiophile headshell on a Technics SL-1400 no hum:thmbsp:

 

[Mr. Lin]

Grado Silver on Pro-Ject RM-5: Slight hum that gets louder toward the center.

Still sounds incredible.

 

[pbda]

Grado Reference Sonata with Linn LP12 (Hercules power supply) and Ittok LVIII tonearm: No hum.

 

[amelia]

Has Shielding The Motor Been Covered?

I have completely isolated Grado hum with a piece of metal bent as necessary to be between the motor and cartridge. It was an 8MZ and a CJ Sonographe table (like a Sota Comet). It was steel about 1/8" or 3/16".

Questions can email me at rwd1018@hotmail.com as I won't be checking back here.

 

[Tmac83]

Marantz 6300 with Grado Gold no hum

 

[Scorpion8]

Dual CS-714Q and Technics SL-D3 w/Grado ZTE+1 ..... no hum on either.

 

[cason]

Grado Platinum on ProJect XPression 1.2 No Hum

Grado Gold P-mount on Technics SL-Q200 No Hum

 

[Rotoplooker]

Grado Black + Thorens TD 147 Jubilee

Grado Black + Thorens TD 147 Jubilee/upgraded interconnects = no hum.

 

[Mr. Lin]

Grado Reference Platinum on Pro-Ject RM5: little bit of hum, gets louder towards center.

Sounds so good I don't care.

 

[Juniperlater]

Before I switch tables, I guess I should write that:

Ariston Q-Deck/Grado Reference Platinum = no hum at all.

 

[Robie]

Grado 8MX and Black with Rotel RP-1000, no hum.

Grado 8MX with Rega Planar 2, no hum.

 

[Jonesy09]

Grado Blue + Dual 1246 = no hum

 

[kermit z]

Grado Black on a Technics SL-1300MKII and no hum

 

[gearhound]

Grado Sig.8M with AR ES-1.............no hum.

Steve

 

[sdana1231]

This thread is great. I just purchased a Dual CS 503-1 that had many upgrades including new interconnects and 5 way grounding post and when I plugged it in it was humming. Thought it was time for a new amp...


Dual CS 503-1 w/ Grado Green - Hum

 

[Juniperlater]

Before I switch tables, I guess I should write that:

Ariston Q-Deck/Grado Reference Platinum = no hum at all.

Now the Pro-Ject Xpression III/Grado Reference Platinum = no hum at all.

 

[bobschneider]

Linn LP-12, Valhalla power supply, Linn Basik Plus arm, Grado Gold - no hum at normal or even loud volumes, but noticeable hum with volume past 1 o'clock and arm cued up towards center of LP.

 

[pbda]

Linn LP-12, Ittok LVIII arm, Hercules Power Supply, Grado Sonata.

Hum that increases as the cartridge approaches the center of the platter. This hum is motor-dependent (motor turned off = no hum).

Have tried using mu metal to cover the motor, but that does not help.

 

[myopia]

Luxman PD277 with Grado G1 Gold - no hum, sounds wonderful
Dual 1257 with Grado Blue - slight hum in middle area of record side, not so much at beginning or end

 

[PeterWebb]

I've got a Grado Green on a stock Technics 1210MG5. There is no hum.