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ieales

Responses from ieales

Skeptic or just plain hard headed
@geoffkait The reason the ring has to be green is because green is the complementary color of red, which means red + green = blackBaloney!Red + Green = YellowA green filter of sufficiently steep slope blocks red. The 'filter' characteristics of Gr... 
Skeptic or just plain hard headed
Here's a two hour 'burn out' challenge.Select about 30 seconds of music you know well and loop it on a cold system at its normal level. Play it for two hours continuous, listening all the while. I guarantee it will change.In a day or two, repeat t... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
I am getting some ground loop noise from my Classé 5300 amp.I wired studios with 1000's of interconnections. We never used cheater plugs. E V E R !!  Solve the problem, don't bandaid it. Sometimes it involved fixing the gear's internal wiring.Are ... 
Has anyone added a small subwoofer to 2 channel and been thrilled with the result?
You have to find the bass node in your room to find the best placement.If a sub is fully controllable and there is a prime listening position, there are many possible placement sites. For stand mounted speakers slightly ahead of the main woofer to... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
@ramtubes preamp is balanced via electronic buffers. We don’t want to short those.Depends on the circuit design. A lot of pro gear has IC balanced outputs that can short either leg to Gnd and the output acts single ended, driving no current into t... 
Has anyone added a small subwoofer to 2 channel and been thrilled with the result?
With the SF Concerto, rolling the low end from the mains and adding a sub will increase the 'low end precision'. Ported speakers have poor bass transient response. Consequently avoid ported subs if you want good bass transient response. Hence, a c... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
@teo_audio Interestingly enough, his entire job rides on doing things that are either unmeasurable or so close to being unmeasurable that it is not worth bothering to try.Not true. It is relatively trivial to measure the diode switching noise*. IF... 
Ahhh--Problem solved. Adding a REL sub-bass unit...
@steakster Disinformation abounds here. Prefer it if you can refute engineering facts. 2. - Loudspeaker designers spend great effort creating crossovers for LF/Mid/HF bands. Mathematically it's almost impossible to mate a 12" driver to 8" or small... 
Ahhh--Problem solved. Adding a REL sub-bass unit...
(I always enjoy hearing what engineers hear) Almost no one ever will. The room and electronics are vastly different. Nowadays, by the time the label gets done ’improving’, any similarity between what was mixed and what’s on the disk is quite small... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
Sorry to say this is a horrible product.Ouch!Power in Los Angeles could be very problematic.I added a 5300 in about 2003 and it was a significant improvement even though my amp had an internal LC power filter. At the time, I auditioned 2 Panamax, ... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
@iamasif Is the hum from the chassis or heard through speakers?Are the two circuits on different sides of the breaker box?What is the voltage on each circuit?What else is on each circuit? 
Skeptic or just plain hard headed
Sorry to rain on your parade, but analog tape is not a valid test for before and after. Analog tape decays quite rapidly and print through muddies the sound. Add in sonic differences due to thermal deltas and results are even more suspect. Was the... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
@pwhinson The Thiel is a low impedance speaker, below 4Ω for most of the range with two steep peaks in the bass. https://www.stereophile.com/content/thiel-cs24-loudspeaker-measurementsAn amp to drive these speakers should be happy with a 2Ω load.A... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
I think it was Monster that did it to "burn in" their cablesWhen I consulted with Monster Pro in the 80s & 90s,AFAIR burn-in was never mentioned.The first I heard of it was in the early naughts, but I had been in AA [Audiophile Anonymous] for ... 
Does anyone care to ask an amplifier designer a technical question? My door is open.
If burn in exists in these devices why did we not know about it until recently. I find no references to burn in in the 50s 60s 70s.. when did it start? It's my belief that connectors are the largest culprit. As components became more modular, more...