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UREI / Universal Audio 1176LN compressor for 200 € The proof! Do-It-Yourself Test & Review Part 3 / 3

Here at last the long awaited third part of my thesis . Nothing but facts, facts, facts. : D

building instructions can be found under the Internet sources. Sound samples are assigned to the respective charts. To enlarge a particular image click it.

part 1: basics and background information on the devices

part 2: The comparison

, the evaluation, the conclusion

part 3:

survey statistics, audio samples, references, building instructions

complete thesis in PDF format (without audio)

complete thesis in PDF format (including audio)

(Note:. more links the references in the PDF have some outdated fall back to to this page if necessary, here updated online Furthermore, I know of sound-quality problems in sight, as the sound samples for their Web-Ready 320kbps mp3s had to be converted. Those who like to read the high resolution wav files would like, I may write an email

, I may like to put online.)

I would be happy as always your feedback. Greetings John

statistics of the survey

Please enter your gender to

Please enter your age

sound is your

What are you going to listen to the audio?

you know the UREI 1176 mono compressor?

How important are the following properties with respect to a professional studio compressor?

(Note: This question applies to all of the following items)

fast control response

characteristic sound coloration

good value for money

good mobility

reliable measurement instruments (such as VU meters)

good momentum limit

reputation

great reputation technical data (such as THD and SNR)

different connections (eg XLR and jack)

What file was processed with the original? (Note: This question relates to all of the following items, the subjects did not logically, so that the files have been modified

..
bass guitar 1 unprocessed

Example A (replica)
Example B (original)

Bass Guitar 2 raw

Example A (Original)

Example B (replica)

Kick Drum 1

raw

Example A (Original)

Example B (replica)

Kick Drum 2

raw

example A (replica)

Example B (original)

Drums

raw Example A (Original)

Example B (replica)

guitar

raw

Example A (replica)

Example B (original)

language (female)

raw

Example A (Original)

example B (replica)

song 1 (male)

raw

Example A (Original)

Example B (replica)

song 2 (male)
raw

Example A (replica)

Example B (original)

song 3 (male, bypass mode)

was how difficult it - saw an average - to hear out the differences?

Which example do you think the most obvious differences is in their life?

What is the difference was significant for you heard?

you think the price of the original compressor of about 2000 euros in comparison to the replica (200 EURO) justified?

Could you sacrifice quality for a studio unit be accepted, unless there be only one tenth of the original Price cost?

Figures

Figure 01 An open UREI 1176LN Revision H (SN: 7652 + ...)

Source: http://web.comhem.se/% 7Eu70623529/Urei % 201176.jpg

http://www.nrgrecording.de/html/how_it_works.html

Source:
Fig. 04 block diagram of the original 1176

Source:

http:/ / www.nrgrecording.de / html / how_it_works.html

Fig. 05 Gain Reduction control circuit of the 1176LN Source:
http://www.nrgrecording.de/html/how_it_works.html

Figure 06 Gain Reduction circuit of the 1176LN

FuzzMeasure

Fig. 09 yellow: compression, red: no compression

Source: Article "hand", Professional Audio magazine, issue 4 / 2007, page 82 to 89, Sonic Media Publishing

Figure 10 Phase response of the original
Source: John Power, 2009, made with

FuzzMeasure

Figure 11 Phase response of the replica
Source: John Power, 2009, cutting a screenshot, rendered in
Logic Pro 8 Figure 13 above: original, Bottom: reconstruction

Source: John Power, 2009, cutting a screenshot, created
in Logic Pro 8

Figure 14 above: original, Bottom: reconstruction Source: John Power, 2009, cutting a screenshot, created in Logic Pro 8

Fig. 15 red: original, green : replica

Source: John Power, 2009, made with
Fig. 16 green: compression, blue: without Compression

Haas, Gerhard

"audio circuits for audio engineering, studio and PA "

first Edition, 2006, Elektor Verlag
Meyer, Christoph

"Urei 1176 LN - hardware and software"

2004, Thesis SAE Hamburg

"Design and evaluation of a microphone preamplifier"

2007 thesis SAE Berlin

Nötges, Michael & Wittig, Harald

manual work articles of Professional Audio magazine, issue 4 / 2007 Page 82 to 89, Sonic Media Publishing

Schaufler, Christoph

"The UREI 1176 Limiting Amplifier: Sound quality and operational considerations of the original and its digital emulation"
Wupper, Prof. Dr. Horst
1st edition, 1996, Springer-Verlag 1st edition, 1996, Springer-Verlag

Internet Directory

The music thing

"The specialty store for electronic music DIY

http://www.musikding.de

[cited: 24.09.2009]

Jakob Erland
" The G1176 Clone

http://gyraf.dk/gy_pd/1176/1176.htm

http://gyraf.dk/gy_pd/1176/1176sch.gif

[cited: 24.09.2009]

JBL Pro Service

"UREI 1176LN Manual

http://www.jblproservice.com/pdf/Vintage% 20JBL-UREI% 20Electronics/UREI-1176LNmanual. pdf

[cited: 24.09.2009]

Natsume, Mako "Building the DIY Gyraf 1176LN Clone

http://mnats.net/1176.html

[cited: 24.09.2009]

(Note: Here's a very detailed instruction manual)

NRG Recording

"UREI 1176 FET Compressor

http://www.nrgrecording.de/urei_1176.html
http://www.nrgrecording.de/html/how_it_works.html

http://www.nrgrecording.de/html/history.html

[cited: 24.09.2009]

Reichelt Elektronik

'online store for electronics, "
http://www.reichelt.de

[cited: 24.09.2009]

Universal Audio Universal Audio History"
http:/ / www.uaudio.com / about / history.html
"Product Catalog 2008"
http://www.uaudio.com/_docs/UA-Products-2008.pdf
(currently defective)
[cited: 24.09.2009]
END PART 3
if you've read this far down through, you've earned in any case, a big thanks and much applause.
THANK
& * much * APPLAUSE
your John

part 1: basics and background information on the devices


part 2: The comparison , the evaluation, the conclusion


part 3: survey statistics, audio samples, references, building instructions




complete thesis in PDF format (excluding audio)

complete thesis in PDF format (including audio)



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