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A wishlist of gear to be reviewed by Amir

Thomas savage

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Are we talking about modern Japanese washlet-type bidets?

Or old-school European type?

We have one of the former. We haven't upgraded to the new version that plays music.

If we do, I could send it to @amirm to evaluate it as a speaker before installation.
You better had , you know all his life has been leading up to measuring shit can speakers .

Let's hope directivity is better than I can manage after a late night garlic chilli king prawn.
 

pozz

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Wishlist.

Soundcards:
- RME BabyFace Pro
- RMA DigiFace USB (analog out)
- Arturia Audiofuse

Portable DAC/Amp:
- HRT microStreamer
- HRT dSp
- Musiland MU2 (w/o "plus")

Test measurements:
- Crosstalk
- S/N (w/o THD)
- output impedance vs. freq.

Test for all DUTs:
- THD (w/o Noise) vs. freq. & out power
- IMD vs. freq. & out power
+1 for Arturia Audiofuse. Also if there is a chance for the original Babyface also that would be super!
 

Sam1879

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Hi there. My first Post :)

There are many offers of these 80/100W per chanel Audience AMP25 / AMP35 Amps on Aliexpress.
It offers LineIn and Bluetooth, and it's described with "0.08% THD".
It's descibed as a MOSFET-Amp with "Superior Sound Quality"

Price is under 200$, with PS usually.

Would be great to have especially the Audience AMP35 measured, as I think the design and build quality of these seem to be quite good.

It think the (mostly included) delivered external power supply only brings 72W. Maybe it's important to have a stronger supply for testing purposes.
Photos of inner parts are attached.

Thank you all for sharing your knowledge here and have a nice day.

Best regards.

Sam


Edit: The AMP35 even has an USB-Dac.
 

Attachments

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Imho looks like it is based at TDA7294 chipamp. At least I don't know any other class AB single chip solution in MOSFET technology and that type of case. But I wonder how they managed to generate negative rail from single wall wart. I see only three small 4.7uH inductors, no way it's high power SMPS. Possibly single supply capacitor coupled?
If they didn't failed at anything you should expect 60-70dB of SINAD at best. Enclosure looks elegant and well made but IMHO class D is more interesting, especially in this price bracket.
 

Sam1879

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Thank you.
Just checked the TDA7294 documentation and specs, and there are already some thoughts about it on this forum.
Seems to be at least something very similar to a TDA7294. Though the chip doesn't look exaxtly like pictures of the TDA7294.
Chip in the AMP is not labeled, but also if its not a TDA7294 probably it won't deliver any better specs. Guess your right with "60-70dB of SINAD at best." Still would be great to see some measurements :)
Have a nice day.
 
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Hmm, you might be right. As I recall there was TDA7294 version with isolated package without tab.
Chipamp market is mostly dominated by LM3886 and TDA7294 but that doesn't mean it couldn't something more exotic ;)
Possibly some Chinese manufacturer? Few years ago I heard about Canaan Semiconductors chipamps. They claimed really good performance but I never seen any commercial product utilizing their ICs. http://canaan-semi.com/epage/amp/mobile/index.html
 
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Electrostatic headphone amplifiers please! Especially the solid-state Stax ones.

Thank you for this marvellous web site!
 

Billy Budapest

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I would like to see this measured as well , some reported that the amp could not do low frequency as per the spec ,DC voltage spike would lead to speaker protection would kick in .
I predict bad things for Kinki Studio. Those products look like form over function has been emphasized and the website contains audiophile buzzwords and regurgitates some audiophile myths.
 
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This may have been mentioned already, but this is a product I'd like to see reviewed;

https://mathaudio.com/room-eq.htm

MathAudio Room EQ VST/AU and Room EQ for Foobar2000


  • Corrects deficiencies of room acoustics (multipoint compensation).
  • Corrects acoustic imperfections of speakers.
  • Avoids the pre-echo (pre-ringing) problem of conventional convolver-based room correction systems. The absence of pre-echo ensures the neutrality of the sound.
  • Works in rooms, halls and outdoor venues of any size.
  • Works with zero latency. Perfect for live performances and studio monitoring. Doesn't delay the audio track when playing video.
  • Corrects both amplitude and phase components of frequency response.
  • Quells resonance peaks of frequency response while leaving the deep notches. Avoids the overcompensation which happens in conventional linearizing room correction systems.
  • Manually adjustable level of compensation allows one to reach the maximum transparency of the sound.
  • Supports full range of sample rates from 44,056 kHz up to 384 kHz. All sample rates are supported without resampling to avoid any possible loss in quality.
  • Includes a custom target curve feature.
  • Applies 64-bit signal path throughout.
  • Works with USB measurement microphones (e.g. MiniDSP UMIK-1 or Dayton Audio UMM-6) or standard measurement microphones (e.g. NADY CM100 or Dayton Audio EMM-6).
  • Supports microphone calibration files.
  • Applies a patented method of frequency response correction.
 
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