A wishlist of gear to be reviewed by Amir

[Thomas savage]

They are a wonderful but underused invention in the west. Now, I can test them but no way I am getting a bunch of people on one and perform a "blind test" to see how clean it got them! You on the other hand, are well situated for such tests Thomas.

Blind , nose blind ?

 

[watchnerd]

They are a wonderful but underused invention in the west. Now, I can test them but no way I am getting a bunch of people on one and perform a "blind test" to see how clean it got them! You on the other hand, are well situated for such tests Thomas.

Id appreciate Amirm's thoughts on bidets ?

Come on don't pretend like you don't have a lifetimes experience, both me and @watchnerd eagerly await your response.

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.

 

[Thomas savage]

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]

Would be nice to review a β22 diy headphone amplifier, maybe its a hidden gem like the Hypex Ncore.

https://www.amb.org/audio/beta22/index.cgi?h=/audio/beta22/rmaa_loopback.shtml

It's pretty good.

 

[Harmonie]

I wonder about Kinki Studio EX-M7 amp's measyrements

 

[maverickronin]

Kinki Studio

Off topic aside, that name has always bothered me.

I can't decide if it's supposed to be an intentional misspelling of the English "kinky" or if it's supposed to be "taboo" in Japanese (kinki/きんき/禁忌)

 

[Harmonie]

>>>
What is Topping then ? The icing on the cake ?

 

[orbitaldebri]

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!

 

[Saeniv]

I would really like to see some measurements from:

ifi ZEN CAN
Mayflower ARC MK2

Thanks a lot for your work.

 

[Sam1879]

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.

 

[Bamboszek]

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]

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.

 

[Bamboszek]

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

 

[RaphTim]

I wonder about Kinki Studio EX-M7 amp's measyrements

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 .

 

[brimble]

Electrostatic headphone amplifiers please! Especially the solid-state Stax ones.

Thank you for this marvellous web site!

 

[Billy Budapest]

Qudelix 5k

 

[Billy Budapest]

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.

 

[Toroid]

Would love to see Tekton Double Impacts and MOABs reviewed.

 

[MuseIcal]

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.

 

[MuseIcal]

A speaker I would like to see reviewed is the Polk RTi A3.

I owned a pair of these and thought they were very good. Especially good for a speaker under $250.00

https://www.polkaudio.com/en/bookshelf-speakers/rtia3

6 1/2-inch Dynamic Balance® woofer, 1-inch Dynamic Balance dome tweeter and 150 Watt power handling

ON-WALL, BOOKSHELF AND SOUNDBARS

• Qty Included Pair
• Availability US Internationally
• Orientation Vertical
• Height 14.75" (37.47 cm)
• Width 8.44" (21.44 cm)
• Depth 14" (35.56 cm)
• Weight 16 lbs (7.26 kg)
• Front Array Driver Enclosure Type PowerPort Bass Venting And ARC Port
• Front Array Driver Complement • (1) 6.5" (16.51 cm) d (Round) Dynamic Balance driver with polymer composite cone and rubber surround - Mid/Woofer
  • (1) 1" (2.54 cm) d (Round) Dynamic Balance silk polymer composite dome - Tweeter

AUDIO QUALITY

• Total Frequency Response 40 Hz → 27,000 Hz
• Nominal Impedance 8 ohms
• Sensitivity (1 watt @ 1 meter) 89 dB
• Lower and Upper -3dB Limits 50 Hz → 26,000 Hz

CROSSOVER

• Type 2-way
• Tweeter/Midrange Crossover Frequency 2800 Hz

EXTERNAL AMPLIFIER

• Recommended Amplifier Power Per Channel 20 watts → 150 watts

INPUTS

• Audio Inputs -
• Speaker Inputs (1) Pair of Dual 5-way Binding Posts - Gold-Plated