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I don't remember the exact process I went though, but I'm pretty sure it's a real 60 Hz tone in the power lines that bleeds into the NE5534 via the Vcc-/Vcc+. IIRC, I saw it both on the QA403 and my oscilloscope. It was present even when I tested the main power supply disconnected from the...

I did come up with some additional filtering caps to remove that spike, but decided not to mess with the circuits by adding more filters. In my SPICE models and tests (outside the c30), it did help reduce the 60hz. But I would have had to add a new board with caps between the power supply and...

Personally, I like the Sony/Google TV experience more than the LG interface, at least on the lower-end LG that I have.

I am in California and have the Arendal 1723 S1. It was about 3 days shipping. I think they have a US hub. It's not a bad option for the US. The subwoofer comparison is in this thread. It's a google sheet. There should be instructions, but in a nut shell you want to create a filter view...

You could also add a umik-1 and learn basic REW so you can properly integrate the sub with the speakers and see how the speakers are performing in your room. Those effects are many times greater than any tweeks you could make on the electronics.

I picked up a used dbx 223xs for about $100. Here's how it measured. I plan on using this in a tiny music studio I have to cross over a sub out of a motu ultralite mk5. My target is an 80 Hz crossover. In addition to the measurements that Amir usually does, I added crossover measurements...

Just to bring up the science part.... You can get a phono test record, like the Ortofon. This will have frequency sweeps and steady test tones. It will allow you to measure (e.g. with an audio interface to your receiver and REW), the performance of your current setup. You can then see any...

In regards to having the PA turn on for either the STR or Marantz, you can use a diode combiner for the 12V triggers. https://www.avsforum.com/threads/pre-made-diode-for-12v-trigger-2-sources-1-amp.3069910/

To expand on this, from the manual it sounds like the STR will hard-wire a given RCA input to an RCA output or XLR input to XLR output via a relay. So, it's always connected unless you turn on the STR and select a different input. It works for L+R+Sub1+Sub2. I've never used this mode, but it...

That’s right, it has IR in. I misremembered the inputs. It does support automation via IP. According to the Manuel page 13 HT bypass engages automatically even when in standby..

Personally, I'd try to keep it simple and just daisy chain the trigger through them all. I think the Marantz has 2x trigger out. Run that to the STR trigger in, then the STR trigger out to the amp. I suspect if you just turn on the STR it will turn on the amp, and the marantz will be off. If...

I don't have a technical answer for you, just some points that seem relevant. McIntosh is usually conservative with their specs, so the real damping factor might be much higher, especially in the 20-20k range. They also have different ways to drive difficult loads. For example, the 2-4-8...

I have the DCA Aeon 2 Noire (for a closed) and the Sundara (for an open). I use EQ on both (slightly modified Oratory). I have the RME ADI2 FS DAC, which can drive them both, and does the EQ. I tend to reach for the Sundara more often, if I do not need the closed back. I find them a bit more...

That's interesting, didn't know that about Burdick. I always thought the H was from the class H rails.

I realize @John_Siau is the authority on the AHB2, but I don't know where the "class G" came from. The Benchmark website says "A unique output stage incorporates class-H tracking power supply rails to improve efficiency." And again "The feed-forward error correction also allows the use of...

You should lookup other threads about doing side-by-side amp comparisons. You want to get them level matched and have an easy speaker switch so you can go between the two amps easily and quickly, as people generally don't have great sound memory. you will also want to properly match the AHB's...

For my room, with a MLP about 4m from speakers, I went with 2x AHB2. Most of the time, I listen around -30 to -40 dB on the preamp. When I want to really crank it, I'm up to about -10 dB on the preamp. It's an Anthem STR with the AHB2 set, I believe, on medium sensitivity. I also have a an...

I did try to slip in that waffle word "average" which in the US for a living room is 12x18 ft (3.7m x 5.5m). Yes, I can see 1000wpc (or more) for a room over twice that size. Really, for 98 dB SPL @ 10m with 92 dB speakers and good headroom, I could see 1200 or more depending on the dynamic...

One must also ask, what is making that tone? Most natural sources top out around 16k (cymbal, violin, etc.). So we're talking 1st or 2nd harmonics, which will be down at least 10dB from the fundamental. So that 100dB 24 kHz tone is likely a 110 dB (or more) 12 kHz fundamental. And the...

Happiness is one of those things that some say the more you chase it, the quicker it flutters away. Like a butterfly, it might land near you if you are calm and at peace, but if you chase it, it will lead you on an endless quest for it.