ROWLAND Research D40 Amp

happy_guy · 8th September 2007, 05:45 AM

Hey folks, just bought the aforementioned amp. Looks like it's an early design. Does anybody know anything about this? Mark.

happy_guy · 15th September 2007, 06:12 PM

Nobody knows anything about this??

I may need to post a picture...... PS I still haven't plugged it in and see how it sounds like.

Mark

TNT · 15th September 2007, 06:23 PM

This is a DIY forum - is it a kit?

/

Charles Hansen · 15th September 2007, 06:27 PM

It's a really old design, probably from the early '80s. I think Jeff built them in his garage when he was still working for Ampex, before he quit to start building amps full time. I seem to remember that it was a very slim and maybe rack mount design.

I don't know anything about the circuitry. If it works, you are in good shape. To get any more information, you should just call Jeff Rowland Design Group in Colorado. I don't think he made more than a few dozen of them, and there isn't much information out there on them.

happy_guy · 15th September 2007, 06:41 PM

Charles, good point about contacting Jeff. Didn't know he worked for Ampex before. Indeed it's a rack mount amp. I'll let you know how it sounds like. Thanks. Mark.

happy_guy · 15th September 2007, 06:43 PM

Hey TNT, it's not a kit. I know very little about it. Charles mentioned that it was an old Jeff's 'starter' amp. Mark.

8th September 2007, 05:45 AM	#1
happy_guy diyAudio Member Join Date: Sep 2007	ROWLAND Research D40 Amp Hey folks, just bought the aforementioned amp. Looks like it's an early design. Does anybody know anything about this? Mark.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rowland Research Amplifier Help!	ungie	Solid State	97	7th December 2008 02:23 AM
Jeff Rowland Model 5	itom	Vendor's Bazaar	0	12th July 2008 02:06 PM
Bridgeclone - Rowland Concentraclone	ThorstenL	Chip Amps	29	11th November 2006 01:26 AM
Problem on Rowland model2 need help	Chalitr	Solid State	0	22nd May 2005 06:34 PM
Jeff Rowland	ben goh	Analogue Source	0	14th May 2005 06:04 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

15th September 2007, 06:12 PM	#2
happy_guy diyAudio Member Join Date: Sep 2007	Nobody knows anything about this?? I may need to post a picture...... PS I still haven't plugged it in and see how it sounds like. Mark

15th September 2007, 06:23 PM	#3
TNT diyAudio Member Join Date: Apr 2003 Location: Sweden	This is a DIY forum - is it a kit? /

15th September 2007, 06:27 PM	#4
Charles Hansen diyAudio Member Join Date: May 2003 Location: Colorado	It's a really old design, probably from the early '80s. I think Jeff built them in his garage when he was still working for Ampex, before he quit to start building amps full time. I seem to remember that it was a very slim and maybe rack mount design. I don't know anything about the circuitry. If it works, you are in good shape. To get any more information, you should just call Jeff Rowland Design Group in Colorado. I don't think he made more than a few dozen of them, and there isn't much information out there on them.

15th September 2007, 06:41 PM	#5
happy_guy diyAudio Member Join Date: Sep 2007	Charles, good point about contacting Jeff. Didn't know he worked for Ampex before. Indeed it's a rack mount amp. I'll let you know how it sounds like. Thanks. Mark.

15th September 2007, 06:43 PM	#6
happy_guy diyAudio Member Join Date: Sep 2007	Hey TNT, it's not a kit. I know very little about it. Charles mentioned that it was an old Jeff's 'starter' amp. Mark.