Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Return to Tweakers' Asylum

Message Sort: Post Order or Asylum Reverse Threaded

monoblock input resistor value

68.60.180.89
Posted on January 13, 2021 at 23:23:13
glue tech
Audiophile

Posts: 128
Location: western new york usa
Joined: March 27, 2014
 hi all,
I'm rewiring and simplifying my quad 50e mono blocks. These have an input pot. Their cousins the 50d do not. I would like to eliminate it. the schematic shows that the pot is 40k to 10 k. the 50d schematic shows a 10k resistor. a search shows many types and wattage ratings of 10 k resistors. What type and wattage rating of resistor should i pick for this application?

 

Hide full thread outline!
    ...
RE: monoblock input resistor value, posted on January 16, 2021 at 12:34:20
Lew
Audiophile

Posts: 10911
Location: Bethesda, Maryland
Joined: December 11, 2000
 Just based on the model designations you provided, it seems that the use of the potentiometer at the input came later than the use of the single value resistance (50E vs 50D). Have you used the 50E amplifier in your home system, and when you did, what setting on the pot sounded best? I ask because for some preamplifiers, especially for a tube based preamplifier, a fixed input impedance of 10K ohms might be problematic. On the other hand, getting rid of the pot per se may improve SQ.

 

RE: monoblock input resistor value, posted on January 15, 2021 at 05:27:45
B. Scarpia
 I use Audio Note 1/2 Watt Tantulum as input resistors on my 'Blocks which are "reasonably" priced from Parts Connexion.

 

RE: monoblock input resistor value, posted on January 14, 2021 at 13:18:43
tweaker456
Audiophile

Posts: 7732
Location: SF Bay Area
Joined: June 20, 2020
 Input resistors don't see much current so a 1/4 watt should be fine (unless I'm missing something). I would consider a very high quality resistor like a Vishay metal foil (S102) or at least a Dale RN55. Surplus Sales of Nebraska has quite a few S102 and S102c resistors at very reasonable prices.


So let us stop talkin' falsely now, the hour's getting late --
Robert Allen Zimmerman

 

Page processed in 0.018 seconds.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]