If Posting Measurements/Reviews...

[pozz]

Please pm me with a link so that I can include it in the master review thread and elsewhere in the comparison charts (once some level of standardization is established) as was recently discussed.

Apart from @amirm, here's a list of members (that I know of) who have submitted reviews/teardowns/measurements/tests:

• @audio_tony
• @Blumlein 88
• @DDF
• @edechamps
• @LTig
• @March Audio
• @pkane
• @SEKLEM
• @shanecoughlan
• @SIY
• @STUDIO51
• @trl
• @VintageFlanker
• @WolfX-700

I usually add only full reviews and measurements with some level of detail. In-depth impressions are fine too, as long as they are from an informed perspective. See a few examples here:

• (12 October 2019) Apollon AS1200 (ICEpower 1200AS2)
• (7 October 2019) Parasound Zonemaster 2350 (ICEpower 700AS2)
• (28 May 2019) Ruizu X02 Unboxing & (31 May 2019) Teardown
• (28 May 2019) Topping NX4 DSD Unboxing
• (12 September 2018) Canton GLE 496

 

[SEKLEM]

I wasn't sure if my write ups warranted front page material since they almost entirely subjective with the exception of features mentioned. I'll definitely bookmark this thread and check your list from time to time.

 

[Rja4000]

Hi
I've done some attempt.
https://www.audiosciencereview.com/...n-spl-volume2-model-2602-volume-control.9760/

Will do it more structured in the future.

Just tell me and I will make it more structured (=assertive)
Feedback more than welcome

 

[audio_tony]

I'm working on trying to achieve a more standardised approach but I can't perform many of the measurements that Amirm does.

EDIT: I have a few more vintage amps to test;

Rotel RB06
Harman Kardon HK870
NAD 2200 (if my dummy load can take it!)
Fisher CA860
Tensai 2200
....

 

[Rja4000]

Please pm me with a link so that I can include it in the master review thread and elsewhere in the comparison charts (once some level of standardization is established) as was recently discussed.

Apart from @amirm, here's a list of members (that I know of) who have submitted reviews/teardowns/measurements/tests:

• @audio_tony
• @Blumlein 88
• @DDF
• @edechamps
• @LTig
• @March Audio
• @pkane
• @SEKLEM
• @shanecoughlan
• @SIY
• @STUDIO51
• @trl
• @VintageFlanker
• @WolfX-700

I usually add only full reviews and measurements with some level of detail. In-depth impressions are fine too, as long as they are from an informed perspective. See a few examples here:

• (12 October 2019) Apollon AS1200 (ICEpower 1200AS2)
• (7 October 2019) Parasound Zonemaster 2350 (ICEpower 700AS2)
• (28 May 2019) Ruizu X02 Unboxing & (31 May 2019) Teardown
• (28 May 2019) Topping NX4 DSD Unboxing
• (12 September 2018) Canton GLE 496

About teardown, don't forget Maty

 

[maty]

BTW, just now:

The "Measurement Of Amplifiers Rig" (MOAR): Standard Tests, Loopback results, and the AMOAR Score.

http://archimago.blogspot.com/2019/11/the-measurement-of-amplifiers-rig-moar.html

 

[SEKLEM]

About teardown, don't forget Maty

I can't believe you've done this.

 

[pozz]

I wasn't sure if my write ups warranted front page material since they almost entirely subjective with the exception of features mentioned.

I thought it was a good look at the unit and I appreciated the pics of the internals.

 

[Blumlein 88]

Remind me of any measures you want if I haven't listed them here. I'm amending some reviews to add the standard info if it wasn't there already.

Marantz 7701 AV pre/pro
https://www.audiosciencereview.com/forum/index.php?threads/marantz-avr-7701-dac-measurements.3485/
SINAD is 91 db
Dynamic range 100 db
Linearity 20 bits worth. (note my test of low level linearity is performed differently than Amir's).

Focusrite Forte recording interface.
https://www.audiosciencereview.com/...-of-focusrite-forte-recording-interface.3100/
SINAD is 102 db.
Dynamic Range is 114 db.
Linearity is to the 20th bit (I didn't check lower than this).

Focusrite Scarlett 18i20 recording interface.
https://www.audiosciencereview.com/forum/index.php?threads/focusrite-18i20-dac-measurements.2128/
SINAD is 97 db.
Dynamic Range is 106 db.
Didn't check linearity.

Emotiva UMC200 pre/pro
https://www.audiosciencereview.com/...d-measurement-of-emotiva-umc200-pre-pro.3504/
Jeckyll and Hyde.

HDMI input:
SINAD is 79 db.
Dynamic Range is 99 db.
18 bits of good linearity.

over Coax or Toslink:
SINAD of 66 db.

 

[WolfX-700]

I am still learning how to use APX. I will try to follow the same protocols Amir does.

 

[VintageFlanker]

I am still learning how to use APX. I will try to follow the same protocols Amir does.

@WolfX-700, I just saw your last measurements recently!
Nice to see an alternative offering and get a little idea about some gears measured.

Even more interesting is to measure the ones done by @amirm and see if there is correlation.

 

[Rja4000]

BTW, just now:

The "Measurement Of Amplifiers Rig" (MOAR): Standard Tests, Loopback results, and the AMOAR Score.

http://archimago.blogspot.com/2019/11/the-measurement-of-amplifiers-rig-moar.html

Interesting.
I purchased the Autoranger II too and wanted to use the above-mentioned SPL Volume2 for volume setting.

 

[maty]

I purchased the Autoranger II too and wanted to use the above-mentioned SPL Volume2 for volume setting.

Expensive but it measures very good. https://www.thomann.de/es/spl_volume_2_black.htm € 393

 

[Rja4000]

Expensive but it measures very good. https://www.thomann.de/es/spl_volume_2_black.htm € 393

Got mine new from French dealer, with VAT and guarantee, including shipping, for less than 350€.
Overall, for the whole setup, no comparison with the cost of an AP or even of a RTX6001.

 

[Matias]

I am still learning how to use APX. I will try to follow the same protocols Amir does.

Thanks! Very nice to have someone with an AP555 in China measuring with the same ASR standards.
Now only if we had someone in Europe with an AP555 too, would be great to cover the largest markets.

 

[LTig]

EDIT: I have a few more vintage amps to test;

Rotel RB06
Harman Kardon HK870
NAD 2200 (if my dummy load can take it!)
Fisher CA860
Tensai 2200
....

2 NAD 2200 here, but no dummy load

 

[Rja4000]

Thanks! Very nice to have someone with an AP555 in China measuring with the same ASR standards.
Now only if we had someone in Europe with an AP555 too, would be great to cover the largest markets.

That's nice indeed.

I still think though that 90% of measurement filtering can be done with cheaper equipment.
Then the AP555 may be use to separate the very good from the excellent, or to confirm (or ibfurm) results.

I'm now able to automate tests.
When time allows, I'll work on standardizing more the output drawings, more in line with Amir's recommendations.

 

[LTig]

I'm now able to automate tests.

Tell me more, please!