2. amps-preamps
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Those with experience with Rowland Model 6's?

I have the 6's with their battery power. My whole system is Rowland.
The Coherence II, the Cadence, and the Model 6's.
Incredible with my Quads, both the 63's and the 989's.

Need help if anyone can answer....
One of the amps is warming up unevenly. The right side warms up the left is much cooler. The other amp is coming to temperature and maintanining it correctly on both sides.

Have replaced the fuses that are supposedly to maintain temperatures, on the left side of the troubled amp. But still no difference.

The amp works as well as the one that maintains its temperature on both sides.

Any ideas what might be amiss? Am I forcing the amp even if there is not audible difference?

Thanks for any help.
128x128jemo
9 responses Add your response
hifimaniac
508 posts
 
Great solid state amps; with batteries in AZ it really helped with AC grunge. One of Jeff's best. Enjoy them. Call Jeff; he'll tell you what to do!
rleff
1,065 posts
 
Is this occuring with just the batteries or both power sources (ac/dc)?
jemo's avatar
jemo OP
4 posts
 
Thanks for the question Rleff,

it is just with the amp part, not the batteries.
rleff
1,065 posts
 
I have these amps without the bps and they drive Soundlab m2's and usher rw 723 monitors and one channel seems to run hotter than the other and never thought it was a concern as class A amps run hot (hotter) than other class amps.
I would call rolands tech support group to get their opinion as well.
My battery question was to see if the amp section acts the same without the batteries being used.
jemo's avatar
jemo OP
4 posts
 
This is interesting. I spoke to Jeff and it is possible that one may run hotter than the other depending on what each speaker is drawing in power.
However, in my set one of the amps is running cooler on one side only.
So when I get back after new years, I will recheck if the fuses have been blown again on the temperature control system.
According to Jeff it is possible that since there are seperate amps left and right of each unit, only the temperature elements may have trouble, if the sound is equivalent on both amp units.

Will get back to you in a week or so.
jemo's avatar
jemo OP
4 posts
 
Rleff,

I just saw your other threads from some time ago. Interesting that you also have dipoles, and even ones that require even more power.

If you can get the batteries, by all means do so! The sound field opens up and it is even closer to tubes, yet, with greater realism.

If it is of interest, I have used the REL sub along with my Quads, and it is very well intergrated. It was amazing to see what the 6's brought out in the lower end of the spectrum with the REL.

Do you have any info on how A class our 6's are? Is it for the first 10 watts or so?
rleff
1,065 posts
 
Jemo I was told they are class A and not a sliding biased amp;I never checked with rolands tech support group though.
I always have my eye out for the BPS option as I have been told from others as well that it is a very worthwhile investment.
hifimaniac
508 posts
 
Hey guys, Jeff Rowland has a friend, Ron that deals in his older equipment. I purchased my 6's and BPS from Ron and was referred to him by Jeff himself. Shoot him an email and let him know you are looking for batteries and he may stumble across a source from them. He is a very good guy and knows Jeff's equipment really well. Here is the email to reach him, I believe:audioelan@msn.com.
Good luck; the batteries are awesome; lower noise floor, smooth sound, very musical.
rleff
1,065 posts
 
Thanks Hifimaniac I will shoot off a email to him today.
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