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Old 20th October 2005, 07:52 AM   #1
Jazr is offline Jazr  United States
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Default 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.
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Old 20th October 2005, 06:01 PM   #2
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Default 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.
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Old 20th October 2005, 11:28 PM   #3
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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.

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Old 21st October 2005, 05:36 PM   #4
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Default 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
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Old 21st October 2005, 05:38 PM   #5
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Here is the thread The Unvailing of the ???? at the CES
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Old 21st October 2005, 07:19 PM   #6
DaveM is offline DaveM  United States
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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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Old 21st October 2005, 08:27 PM   #7
Jazr is offline Jazr  United States
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Default Raven R2

Hi Nelson,
Would you mind sharing what order the Raven was crossed at 8800 with? Thanks.
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Old 21st October 2005, 09:03 PM   #8
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Default Re: Raven Crossover

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.

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