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ieales

Responses from ieales

Living with unsolvable hum - Any audio detectives out there?
As good as Jensens are, any transformer will introduce sonic artifacts which vary with the equipment either side of them. 
Living with unsolvable hum - Any audio detectives out there?
It's a no brainer that 60Hz hum is likely a ground loop.A Loop Break in the amps from Earthing (Grounding) Your Hi-Fi - Tricks and Techniques (sound-au.com) may solve the issue and keep the system safe.!!_DO NOT RUN THE SYSTEM WITH THE SAFEY EARTH... 
Living with unsolvable hum - Any audio detectives out there?
Does one connected power amp only hum? i.e. completely remove one amp from the system.Try each amp. One amp may be quieter than the other.If no hum with only one amp, try reversing power transformer input leads on the other power amp. I had a simi... 
Newly patented, infinitely adjustable system tuning
Audacity.RIP, EQ, BURN.One & Done.Licenced in the Public Domain.   The GNU General Public License v3.0 - GNU Project - Free Software FoundationSorry about your patent, Eric... 
Perfect Speaker Placement - Put next to the back wall as much as possible.
Did you read the article? Yes. Any many similar over the years. It was talking about setting up a mixing studio. " Start by facing the short wall of your room" is a non-starter. Many ’mixing studios’ I worked in and my company wired had the desk ... 
Perfect Speaker Placement - Put next to the back wall as much as possible.
The usage is different, but acoustics does not magically change, and goals acoustically need to be similar. Control room acoustics are nothing like home.Walls, floors, trapping, etc. vary massively from studio to studio. Large control rooms ma... 
Perfect Speaker Placement - Put next to the back wall as much as possible.
As a retired recording engineer, I can tell you first hand that studio and home setups are as different as chalk and cheese.In the studio, we don't listen to music. We listen to instruments, voices and mixes.B I G  difference. 
Is this how a Subwoofer Crossover is supposed to work?
@ OPCheck out ieLogical SubterraneanHomesickBlues for a little information on setting up subs and how their controls work.Definitely characterize you subs individually at close range and in the same position.Visit hunecke.de | Loudspeakers Calcula... 
What is the name of the tool?
The Illuminated Power Output Watt Meter on the MC501 is peak responding, and indicates the true power output of the amplifier No, they measure voltage. Power would only be correct for a pure resistance. Examine loudspeaker impedance curves. S... 
What is the name of the tool?
Meters are too slow unless they are instantaneous peak reading with decay, read voltage, not power, and only if you know the amp voltage capability at all frequencies.Most meters come under the classification of jewelry and are installed for appea... 
Cables 101, new student, first question
So I know what I’m talking about. Or perhaps not.Cables, regardless of cost or manufacturer, must mate well with the components they connect.All else is hooey.See ieLogical CableSnakeOil for a bit of science and some links to intelligent papers. 
Should I use long interconnects, or long speaker cables?
First off, what is the room construction?Basement, 2nd floor, interior/exterior wall?All of these affect transmissive coupling.20 foot unbalanced interconnects with a low impedance output pre-amp into 10x amp impedance will be fine. Canare Star-Qu... 
I've been dragged to recommendations, kicking and screaming
What's your experience been with online streaming and automated recommendation systems? THX1138 
More power for moderate listening levels?
 I added a T+A power supply that adds 1800 watts. Power is V x A.Increasing 4Ω power from 500 to 1800 requires changing the voltage from 45 to 85. Current would increase from 11 to 22A. It very unlikely the output devices were that over spec'd ... 
More power for moderate listening levels?
That has got to be a lot more than a few mV bias. The JC1 has 9 pairs of output transistors.25W ≈ 22mV across 18x 1.3Ω emitter resistors