Information about Hafler

Taifun · 17th February 2006, 08:13 PM

What difference between Hafler 9300 and 9303 or 9500 and 9505. I try to find information about this, but find different opinion.
I have shematic for 9300/9500.
And I want to see schematic 9303/9505. This files on Hafler server
MAN0587D_9303_9505_man
MAN0587E_9505_man
have not schematic. Please, send me this files with schematic if anyone have it.
Thanks.
taifun@clink.ru

Raoul · 18th February 2006, 12:44 AM

I don't have a schematic for the 9303/9505, but the '03 and '05 series offer balanced (XLR) connectors. The flexibility is accomplished by the use of an op amp (absent on the 9300/ 9500), which arguably degrades the sound. Diyaudio member Dick West seems pretty knowledgeable about Hafler products; hopefully he will find this thread.

Dick West · 18th February 2006, 03:25 AM

Info about the 9300 series is beyond my pay grade. My expertise (whatever that is) is with the earlier models that also were kits. The later models and later professional models never had all the info published about them the earlier kit models enjoyed. Sorry, but I have no help here.

Dick West · 18th February 2006, 03:37 AM

The use of an opamp, as Raul suggested, might be done by adding a separate board, which is standard practice for some other Haflers.

Here is an example of one:

http://www.diyaudio.com/forums/showt...746#post674746

BTW, I still have this board if anyone is interested

Raoul · 18th February 2006, 04:34 AM

You might try calling around to local repair shops or local dealers that sold Hafler equipment. That is how I found the schematic for my 9300. It's too bad that Rockford/ Hafler seems to have "whited-out" the schematic on the online PDF manual.

Taifun · 18th February 2006, 02:04 PM

Is the 9303/9505 have schematic in manual with amp?

Raoul · 18th February 2006, 03:32 PM

Quote:

Is the 9303/9505 have schematic in manual with amp?

I'm not positive that the schematic is included, but it is implied by the pages in the online manual that list "Schematic" and "PC board layout". These pages in the PDF are, of course, blank. They look similar to the pages in the 9300 manual that include schematic, though.

Taifun · 19th February 2006, 01:48 PM

Thanks to all!

17th February 2006, 08:13 PM	#1
Taifun diyAudio Member Join Date: Feb 2006 Location: Russia	Information about Hafler What difference between Hafler 9300 and 9303 or 9500 and 9505. I try to find information about this, but find different opinion. I have shematic for 9300/9500. And I want to see schematic 9303/9505. This files on Hafler server MAN0587D_9303_9505_man MAN0587E_9505_man have not schematic. Please, send me this files with schematic if anyone have it. Thanks. taifun@clink.ru

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18th February 2006, 12:44 AM	#2
Raoul diyAudio Member Join Date: Feb 2003 Location: OR	I don't have a schematic for the 9303/9505, but the '03 and '05 series offer balanced (XLR) connectors. The flexibility is accomplished by the use of an op amp (absent on the 9300/ 9500), which arguably degrades the sound. Diyaudio member Dick West seems pretty knowledgeable about Hafler products; hopefully he will find this thread.

18th February 2006, 03:25 AM	#3
Dick West diyAudio Member Join Date: Aug 2004 Location: Illinois	Info about the 9300 series is beyond my pay grade. My expertise (whatever that is) is with the earlier models that also were kits. The later models and later professional models never had all the info published about them the earlier kit models enjoyed. Sorry, but I have no help here.

18th February 2006, 03:37 AM	#4
Dick West diyAudio Member Join Date: Aug 2004 Location: Illinois	The use of an opamp, as Raul suggested, might be done by adding a separate board, which is standard practice for some other Haflers. Here is an example of one: http://www.diyaudio.com/forums/showt...746#post674746 BTW, I still have this board if anyone is interested

18th February 2006, 04:34 AM	#5
Raoul diyAudio Member Join Date: Feb 2003 Location: OR	You might try calling around to local repair shops or local dealers that sold Hafler equipment. That is how I found the schematic for my 9300. It's too bad that Rockford/ Hafler seems to have "whited-out" the schematic on the online PDF manual.

18th February 2006, 02:04 PM	#6
Taifun diyAudio Member Join Date: Feb 2006 Location: Russia	Is the 9303/9505 have schematic in manual with amp?

19th February 2006, 01:48 PM	#8
Taifun diyAudio Member Join Date: Feb 2006 Location: Russia	Thanks to all!

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