Monaural Pre-Amplifier like X0.2/XP-30 so as Integrated Amp - very special and rare - diyAudio
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Old 5th September 2011, 08:59 PM   #1
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Default Monaural Pre-Amplifier like X0.2/XP-30 so as Integrated Amp - very special and rare

Monaural power amp devices are nothing special - there are a wide range of manufacturers.
But for me very special are pre-amplifiers and integrated amplifiers in a monaural design.
And such design's I prefer
Unfortunately I know only this examples from each kind of amp.

1) Monaural Pre-amplifier: only the currently available Pass XP30
Pass Laboratories
http://www.passlabs.com/pdfs/product...s/XP-30_OM.pdf (Owner's Manual english)
and the legacy (vintage) model X0.2
http://www.passlabs.com/pdfs/old%20p...ls/x0.2_om.pdf (Owner's Manual)
DONG FONG AUDIO: Pass Labs X 0.2 PreAmp ( Used ) (Offer)

2) Monaural integrated Amplifier JVC AX-M9000
HiFi-Do McIntosh/JBL/audio-technica/Jeff Rowland/Accuphase
http://venetor-sound.com/main/AX-M9000-01.jpg
http://venetor-sound.com/main/AX-M9000-02.jpg
VICTOR ƒ‚ƒmƒ‰ƒ‹ƒvƒŠƒƒCƒ“ƒAƒ“ƒvAX-M9000‚ÌŽd—l ƒrƒNƒ^[
??????????????????AX-M9000??????????????RM-RE9000?
http://av.watch.impress.co.jp/docs/20060914/vic15.jpg
http://www.jvc.de/html/faq/highend/a...000Deutsch.pdf (Owner's German)
JVC AX-M9000 Manuals, Support and Troubleshooting - Amps (Owner's english)
JVC AXM9000 Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics
JVC AX-M9000 SM 2 Service Manual free download, schematics, eeprom, repair info for electronics

The preamp models X02 and XP30 are more consequently aligned to high performance, because the power supply has been extracted along with the operating/VF-display unit (with a lot of devices, which are critical by a close arrangement of the signal path) of the actual pre-amplifier devices.
This wasn't realized by the integrated Amp from JVC.



Who knows additional examples of this very rare genre ??
Attached Images
File Type: jpg JVC AX-M9000-front.jpg (111.0 KB, 931 views)
File Type: jpg JVC AX-M9000-rear.jpg (169.8 KB, 919 views)
File Type: jpg Pass Labs X 0.2 front panels.JPG (159.7 KB, 916 views)
File Type: jpg Pass Labs X 0.2 rear panels.JPG (223.2 KB, 908 views)
File Type: jpg Passlabs XP-30_rfront.jpg (76.3 KB, 890 views)
File Type: jpg Passlabs XP-30_rear.jpg (160.1 KB, 284 views)

Last edited by tiefbassuebertr; 5th September 2011 at 09:04 PM.
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Old 5th September 2011, 09:04 PM   #2
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I don't recall seeing any others.

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Old 21st September 2011, 11:24 AM   #3
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For this reason it would be a good idea, to replace the presently output stage through a very small power amp stage in your preamplifier for a special integrated amp series (e. g. arround 2-6 watts output power at 8 ohms) for directly connecting of high efficiency speakers (or also even low efficiency and small speakers like ProAc Tablette or Auratone 5C in very small rooms).
The already massive housing envelope is entirely sufficient as a heat sink by this wattages.

In your currently monaural preamp models unfortunately this massive aluminum housing parts are not used as a heat sink.

Last edited by tiefbassuebertr; 21st September 2011 at 11:26 AM.
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Old 16th January 2012, 02:30 PM   #4
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It's me, Yves Bernard André.
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Old 16th January 2012, 03:13 PM   #5
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NP is a man capable to do so many things , but he just isn't capable to make small Pass amp ...... (without forced cooling )

somehow I can't imagine PL making D class amps ( ok - I remember that pic from Ark , but that was ..... )

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Old 27th January 2012, 12:17 PM   #6
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Hi,

Quote:
Originally Posted by tiefbassuebertr View Post
Who knows additional examples of this very rare genre ??
The AMR AM-77 is a Stereo Amplifier, however it can be switched to mono operation and multiple units can be slaved together. So it kind of applies.

In Mono-Mode the solid state output stages of the two channels (it is a hybrid amp) are paralleled up on the inputs (and also outputs too if the single output mode is selected - bi-amping is the other option in which case the outputs remain independent), everything else just uses the left channel's circuitry.

Ciao T
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Old 28th January 2012, 09:02 AM   #7
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good advice - thank you.
http://www.fastaudio.com/workspace/u...r-serie-77.pdf
amr ph77
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Old 28th January 2012, 12:48 PM   #8
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Hi,

Quote:
Originally Posted by tiefbassuebertr View Post
Modesty and full disclosure obliges me to point out that the design of these units is to a certain degree by yours truly.

Ciao T
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Old 5th July 2012, 11:54 AM   #9
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Quote:
Originally Posted by jacco vermeulen View Post
Knock, Knock !
Who's there ?
It's me, Yves Bernard André.
Which models are this pre- and power amps from YBA ?

not mentioned about
YBA Product Overview
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Old 5th July 2012, 04:09 PM   #10
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Preamplifier : Signature 6 (total of 6 cases) , Signature 4 (4 cases, phono stage built in the L+R preamp boxes)
For each channel of the six box affair : 1 power supply chassis, 1 preamp case, 1 phono box.

(Signature power amp : 1-case stereo version, 2 monaurals, and a 4-box version with 4 x 500VA transformers per channel)
Attached Images
File Type: jpg Signature_preamplifier6.jpg (41.3 KB, 130 views)
File Type: jpg YBA-signature.jpg (39.4 KB, 86 views)
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Last edited by jacco vermeulen; 5th July 2012 at 04:29 PM.
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