Audio Research SP9 Circuit Diagram HELP!

calvert73 · 2nd September 2006, 01:48 PM

Hi, I'm looking for a circuit diagram for the ARC SP9 ideally all 3 versions with parts lists, I'd be glad to pay even for a good scan via e-mail.

RC

calvert73 · 7th September 2006, 11:32 AM

even just the line section. I dont mind ordering one from ARC via snail mail (forget about AS in the UK prices are just silly!) but my hand is itching!

RC

gingertube · 11th September 2006, 03:42 AM

RC,
Not exactly what you want BUT
SP6 , 8, 10, 11, 14, 15 schematics are here:

http://www.pi.infn.it/~federico/further.htm

I'd just grab copies of the SP8 and SP10 and hope that teh SP9 is somewhere in between.

Cheers,
Ian

calvert73 · 17th September 2006, 10:26 AM

Thanks Ian,

the SP8 and SP10 (which I've owned) are all valve the SP9 is a hybrid circuit but quite different to the SP11.

RC

Toaster · 27th September 2006, 03:25 PM

Hi, I have the circuit for the SP9 MK1- ARC thoughtfully include it with the manual. Bear in mind though that some of the fets are ARC own brand and equivalents are not listed, so it depends what you're trying to do as to whether the circuit'll do you any good...

Valde · 22nd February 2008, 07:16 AM

Hi Folks and mainly Toaster,

I'm in the same situation for the need of a circuit diagram for a SP9 mkI.

The ARC dealer in Denmark won't handover a sheet to even if I pay for it.

My ARC SP9 has a modified phono section. The 2 big transistors (in a TO-220 housing) in the mid of the phono stage has been removed a modified with one EC91 in each channel. Somebody claims that this is in the powersupply section of the phono section but I doubt. So I will be very pleased to see a circuit diagram for the SP9 (the original version, but a later version will also be apreciated

Regards
Valde

Luke · 22nd February 2008, 07:19 AM

check out the arc database

http://www.arcdb.ws/

caliban · 22nd February 2008, 08:11 AM

I have the schematic. if you don't get if from anyone else, let me know and I will photograph it and send it to you. Mine is dated 4-20-97, it's an original SP9.

caliban · 22nd February 2008, 10:22 AM

Typo: 97 should be 87

Valde · 22nd February 2008, 10:35 AM

Caliban!

Wow, I would be very pleased to get an email from you with the scanned circuit diagram for the SP9

The web side Luke mentioned does not include the SP9, SP1->8 and SP10-> so again I will be very happy to receive your email

Regards
Valde

flemming.skov@nypost.dk

2nd September 2006, 01:48 PM	#1
calvert73 diyAudio Member Join Date: Aug 2005	Audio Research SP9 Circuit Diagram HELP! Hi, I'm looking for a circuit diagram for the ARC SP9 ideally all 3 versions with parts lists, I'd be glad to pay even for a good scan via e-mail. RC

7th September 2006, 11:32 AM	#2
calvert73 diyAudio Member Join Date: Aug 2005	SP9 Line Circuit? even just the line section. I dont mind ordering one from ARC via snail mail (forget about AS in the UK prices are just silly!) but my hand is itching! RC

17th September 2006, 10:26 AM	#4
calvert73 diyAudio Member Join Date: Aug 2005	Not Quite! Thanks Ian, the SP8 and SP10 (which I've owned) are all valve the SP9 is a hybrid circuit but quite different to the SP11. RC

22nd February 2008, 07:16 AM	#6
Valde diyAudio Member Join Date: Nov 2007 Location: Nordjylland	mkI Hi Folks and mainly Toaster, I'm in the same situation for the need of a circuit diagram for a SP9 mkI. The ARC dealer in Denmark won't handover a sheet to even if I pay for it. My ARC SP9 has a modified phono section. The 2 big transistors (in a TO-220 housing) in the mid of the phono stage has been removed a modified with one EC91 in each channel. Somebody claims that this is in the powersupply section of the phono section but I doubt. So I will be very pleased to see a circuit diagram for the SP9 (the original version, but a later version will also be apreciated Regards Valde

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11th September 2006, 03:42 AM	#3
gingertube diyAudio Member Join Date: Oct 2004 Location: Adelaide South Oz	RC, Not exactly what you want BUT SP6 , 8, 10, 11, 14, 15 schematics are here: http://www.pi.infn.it/~federico/further.htm I'd just grab copies of the SP8 and SP10 and hope that teh SP9 is somewhere in between. Cheers, Ian

27th September 2006, 03:25 PM	#5
Toaster diyAudio Member Join Date: Jun 2004 Location: South East England	Hi, I have the circuit for the SP9 MK1- ARC thoughtfully include it with the manual. Bear in mind though that some of the fets are ARC own brand and equivalents are not listed, so it depends what you're trying to do as to whether the circuit'll do you any good...

22nd February 2008, 07:19 AM	#7
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	check out the arc database http://www.arcdb.ws/

22nd February 2008, 08:11 AM	#8
caliban diyAudio Member Join Date: Feb 2008	I have the schematic. if you don't get if from anyone else, let me know and I will photograph it and send it to you. Mine is dated 4-20-97, it's an original SP9.

22nd February 2008, 10:22 AM	#9
caliban diyAudio Member Join Date: Feb 2008	Typo: 97 should be 87

22nd February 2008, 10:35 AM	#10
Valde diyAudio Member Join Date: Nov 2007 Location: Nordjylland	Caliban! Wow, I would be very pleased to get an email from you with the scanned circuit diagram for the SP9 The web side Luke mentioned does not include the SP9, SP1->8 and SP10-> so again I will be very happy to receive your email Regards Valde flemming.skov@nypost.dk

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