Amp for Raven R1, R2

Jazr · 20th October 2005, 07:52 AM

Can anyone recommend a great amp to pair with the Raven R1 or R2 ribbon drivers. They present a mostly resistive load of 2.5 ohms and require very little power. I would prefer +4 balanced inputs. The source is a Behringer dcx-2496 crossing at 3K.

Eclipse911t · 20th October 2005, 06:01 PM

NP uses a small Aleph on the Raven in the Rushmore. Just crank up the bias a bit. 15v and 2.4 amps, 4 - 6 devices. Should do it quite nicely.

28watts @ 2.5 ohms

As I recall there was a bit of controversy about the crossover setting. Check out the Rushmore thread.

Nelson Pass · 20th October 2005, 11:28 PM

The Rushmore crosses the R2 in at 8800 Hz. I am not
aware of any controversy about this, but that was our
favorite setting for about 2 years, and that's what shipped.

Eclipse911t · 21st October 2005, 05:36 PM

Perhaps controversy was not the right word.

I just recalled Peter Daniel liking it crossed-over down around 7k AND melting his Ravens from time to time.

When in doubt, the Master is right.

Patrick

Eclipse911t · 21st October 2005, 05:38 PM

Here is the thread http://www.diyaudio.com/forums/showt...703&highlight=

DaveM · 21st October 2005, 07:19 PM

I'm not sure what type of crossver is being used, but I have a pair of Raven 2's that I have been running for about 4 years without issue. From time to time they do see ear splitting volumes for short periods.

I am using a D'Appolito designed crossover at 1800 Hz.

http://www.zalytron.com/Schematics/991033Z_A.jpg

I've never had a problem. I think that any low freq information is destructive to them. They really need to have a high order crossover to be safe. But ribbons are very cheap (were free to me for my R1) and are easy to replace.

Now the Raven 1 is a different. I am working on a design using a R1, and I don't think I would suggest using it below 3500. It starts to sound a bit thin when you ask it to do too much. Again high order crossover is in order.

DaveM

Jazr · 21st October 2005, 08:27 PM

Hi Nelson,
Would you mind sharing what order the Raven was crossed at 8800 with? Thanks.

Nelson Pass · 21st October 2005, 09:03 PM

Quote:

Originally posted by Eclipse911t
I just recalled Peter Daniel liking it crossed-over down around 7k AND melting his Ravens from time to time.

Perhaps the Raven design is not intended for Industrial
applications.

We used 2 poles and a DC blocking cap.

20th October 2005, 07:52 AM	#1
Jazr diyAudio Member Join Date: Feb 2005 Location: Oregon	Amp for Raven R1, R2 Can anyone recommend a great amp to pair with the Raven R1 or R2 ribbon drivers. They present a mostly resistive load of 2.5 ohms and require very little power. I would prefer +4 balanced inputs. The source is a Behringer dcx-2496 crossing at 3K.

20th October 2005, 06:01 PM	#2
Eclipse911t diyAudio Member Join Date: Mar 2005 Location: Fort Wayne, IN	Rushmore NP uses a small Aleph on the Raven in the Rushmore. Just crank up the bias a bit. 15v and 2.4 amps, 4 - 6 devices. Should do it quite nicely. 28watts @ 2.5 ohms As I recall there was a bit of controversy about the crossover setting. Check out the Rushmore thread. __________________ "I'm against picketing but I don't know how to show it." ~Mitch Hedberg

21st October 2005, 05:36 PM	#4
Eclipse911t diyAudio Member Join Date: Mar 2005 Location: Fort Wayne, IN	Raven Crossover Perhaps controversy was not the right word. I just recalled Peter Daniel liking it crossed-over down around 7k AND melting his Ravens from time to time. When in doubt, the Master is right. Patrick __________________ "I'm against picketing but I don't know how to show it." ~Mitch Hedberg

21st October 2005, 05:38 PM	#5
Eclipse911t diyAudio Member Join Date: Mar 2005 Location: Fort Wayne, IN	Here is the thread http://www.diyaudio.com/forums/showt...703&highlight= __________________ "I'm against picketing but I don't know how to show it." ~Mitch Hedberg

21st October 2005, 08:27 PM	#7
Jazr diyAudio Member Join Date: Feb 2005 Location: Oregon	Raven R2 Hi Nelson, Would you mind sharing what order the Raven was crossed at 8800 with? Thanks.


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20th October 2005, 11:28 PM	#3
Nelson Pass The one and only Join Date: Mar 2001	The Rushmore crosses the R2 in at 8800 Hz. I am not aware of any controversy about this, but that was our favorite setting for about 2 years, and that's what shipped.

21st October 2005, 07:19 PM	#6
DaveM diyAudio Member Join Date: Feb 2003 Location: Vermont	I'm not sure what type of crossver is being used, but I have a pair of Raven 2's that I have been running for about 4 years without issue. From time to time they do see ear splitting volumes for short periods. I am using a D'Appolito designed crossover at 1800 Hz. http://www.zalytron.com/Schematics/991033Z_A.jpg I've never had a problem. I think that any low freq information is destructive to them. They really need to have a high order crossover to be safe. But ribbons are very cheap (were free to me for my R1) and are easy to replace. Now the Raven 1 is a different. I am working on a design using a R1, and I don't think I would suggest using it below 3500. It starts to sound a bit thin when you ask it to do too much. Again high order crossover is in order. DaveM

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