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So I've had this player in the closet for many years. Did not get much use due to use of streaming and ripping my CD collection. But anyway, it contains dual Wolfson DACs WM8740 and with the use of @NTTY s recent work I ripped some test files to CD and made a few tests. This is not a...

This is a mini review of the Mørch DP-8 tone arm with some measurements. There are not many reviews of such around, but given the unusual design of this tone arm, I am going to make a try. I went from a Linn Akito tone arm to a Mørch UP-4 unipivot tone arm a few years ago, mostly because the...

I start to believe. Scary. Measurements will come but difficult to say what to measure vs the UP-4 arm.

I found a video on AK regarding arm/cartridge ”dance” while playing the highly modulated Billie Jean on M Jacksons album Thriller. I checked my own and it does the same. My guess is that this would be fixed if the horizontal Rf would be low, as would be expected if you use an arm with much...

Last night the D10s suddenly just muted and gave no sound. Connected to Mac Mini via USB and then to AVR via analogue. Sound works fine via HDMI between Mac Mini to AVR. D10s is detected on USB bus. Bought in June 2023. Any thoughts?

Yes, that is the question. Injector cleaners, engine cleaners from STP and similar brands. Snake oil all of them?

These are my findings. - Severely scratched records goes to the bin. - Minor scratched records gets "fixed" by using real-time click-repair But what about other possible "fixes" (found on the internet): - Using toothpick or cactus spines and microscope to even out the scratch - these are too...

This is a mini review of the HumminGuru ultrasonic cleaner for vinyl records. The following procedure was used for cleaning. 5 minutes of ultrasonic using alkaline water (≈pH 10) followed by 2 minutes ultrasonic in demineralised water and 5 minutes of drying cycle. Both solutions contained 2...

This review was updated September 21, 2023. Main change was the use of the E1DA Scaler to fix the impedance issues that is evident when using the E1DA ADC alone. This is an attempt to make a small review with measurements of the Muffsy MM phono preamplifier. It is a DIY kit so it is far from...

I was wondering how to set and interpret distortion in the RTA window of REW. Below is one measurement of a phono stage. Clearly one can see 50 Hz noise around -95 dB. However, the N figure is at -75 dB. How is the noise (N) calculated? Is this what should be expected? I can't really see how the...

I did some initial experiments with the D10s and Cosmos in the Cosmos thread, and got some weird 100 Hz noise when D10s was connected to Mac mini. Since this seems to be related more to the D10s and Mac mini I made a separate thread. The noise profile, measured with macbook/E1DA on battery...

Both the Marantz NR1510 that Amir reviewed and the NR1710 that I measured both suffer from 100 Hz jitter noise in the digital section that previous models lacked. These models have also added a RIAA input and a chassie GND for grounding. The signal ground appears to the connected to chassis at...

As a follow-up of the poll https://www.audiosciencereview.com/forum/index.php?threads/which-speaker-setup-best-describes-your-primary-audio-system.37604/ I would be interesting to find out how many of you that have only stereo, only multichannel or both (i.e. two different systems). Headphone...

Recorded with in-ear mics at LP upmixed to 4.2.2 (Dolby Atmos). Filtered a bit in the bass to be better suited to Harman-curve headphones. I still hear issues in bass, but it's the best I can do. How does it sound to you using headphones...

Does anyone know how much power, on average, that goes to surround and Atmos speakers vs front speakers? If I use pre out front on my NR1710 and use it only for surronds and Atmos, I will save power for the internal amplifiers. But how much power is normally spent on those channels in movies and...

There are been quite a number of threads dealing with vibrations in speaker cabinets, both in relation to "speaker feet" and vibrations in enclosures themselves. I recently took out my ACH01 accelerometer to do some measurements, both speaker feet and enclosures. There was some initial...

Is there a harman curve for over-ears without the ear canal effect to be down-loaded somewhere? I.e. if you would measure with microphones located in the concha.

Around 2002 I purchased a surge protection filter with (Voltex SP390 J/S) to reduce som surge sound spikes occurring from the amp when a lamp was switched on and off. These are some measurements I made at the time, first spikes with lamp on and off: With the filter, I did not get rid of the...

Take an ideal speaker in farfield listening and use it for nearfield. Will it sound identical? If not should speakers be designed differently depending on listening distance? Not sure if this has been a topic before. Link to that thread if so.

Just painted and will try finish it in the weekend. Will take away the cheap Onkyo Dolby Atmos enables roof firing speakers that doesn’t work as intended. I think top front will add more to the ambience. Speaker kit is Ino Audio Ambience 1.