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Parasound Owners Thread - Page 90

post #2671 of 3341
Quote:
Originally Posted by csupernova View Post

The amp has a ground lift switch but it doesn't eliminate the hum. The hum is actually from the amp itself and not speaker. I have tried different ways of plugging the amp and it still has the issue. I have not tried the cheater plug though. Will try it tonight.

If the hum is not coming from the speakers, and you are actually hearing the amp itself humming, then you may have a power supply going bad. I have 4 Para amps and they are dead quiet even when I put my ear right up to them. I guess it is possible that you may have some dirty power affecting the amp too but a power conditioner would fix that.

I have bought a lot of used stuff over the years and it is very common for the seller to claim "It didn't do that when I had it" so you are left out in the cold if you bought it as-is that is unless the seller will work with you.

Email Parasound and see what they say.
post #2672 of 3341
Quote:
Originally Posted by davee70 View Post

Placement could also be a contributing factor. If there is not enough ventilation, it could cause the amp to hum. I think the guideline for the A23 is at least 3 inches of space above and to the sides of the unit. You can check that by downloading the manual from the Parasound web site.

I can't see how not enough ventiation could possibly cause the transformer in the A23 to hum. I've had my share of components over the years that have had transformer hum. I had bad transformer hum from a Sherbourn 7-2100A amp, PS Audio Quintessence Power Center and an APC H15 Home Power Conditioner. I found it very odd that two power conditioners would have transformer hum. I now have a Panamax 5100EX and it doesn't hum although I'm not sure if it has a transformer (I'm assuming it does). Most amps I've had in my system have had no transformer hum including a Parasound A52 which was dead quiet. All of my components definitely do not have the manufacturers recommended ventilation.

Bill
post #2673 of 3341
The mechanical hum you describe might have something to do with your AC line voltage. Get your electrician to test your line voltage at the outlet where the A23 is getting its power. If the voltage is exceptionally high it may cause some transformer Hum. Also does the amp hum all the time even after a good warm up? Also does it hum during peak draw hours or any time specifically? I agree with previous posts. Make your AC power a variable in your testing by taking the amp to another power source like a buddy's house. Good luck.
post #2674 of 3341
Question: is there a technical reason why the JC1 doesn't accept bare speaker wires?
post #2675 of 3341
Quote:
Originally Posted by WillyJ View Post

If the hum is not coming from the speakers, and you are actually hearing the amp itself humming, then you may have a power supply going bad. I have 4 Para amps and they are dead quiet even when I put my ear right up to them. I guess it is possible that you may have some dirty power affecting the amp too but a power conditioner would fix that.

I have bought a lot of used stuff over the years and it is very common for the seller to claim "It didn't do that when I had it" so you are left out in the cold if you bought it as-is that is unless the seller will work with you.

Email Parasound and see what they say.
+1........my thoughts exactly.
post #2676 of 3341
Quote:
Originally Posted by csupernova View Post
 

The amp has a ground lift switch but it doesn't eliminate the hum. The hum is actually from the amp itself and not speaker. I have tried different ways of plugging the amp and it still has the issue. I have not tried the cheater plug though. Will try it tonight.

I have had this too.  A noise from within the amp itself.  It could be something else on your household circuit that is causing noise, though this is uncommon.  Can you verify that another wall plug is on a different breaker, then try plugging  the amp in there?  A fridge, furnace or freezer could be an issue.

post #2677 of 3341

OK I emailed Parasound yesterday and surprised to received a reply back from the President at 3 am in East Coast !!  Hope they can help me with the issue. Yea, the seller that I bought it from said he didn't have this issue. I tried to plug the amp at another outlet from different circuit breaker and it does the same humming noise. The hum noise is there doesn't matter if the amp is warmed up or not. Cheater plug is of no help since this is humming from the amp itself.

post #2678 of 3341
^ & ^^
I would never call using a 'cheater plug' an adequate or safe solution. I use dedicated circuits for each of my 20 A circuits in my systems (3 wires: hot. neutral, and ground for each recepticle). I feel I can never be too safe and that over kill (within reason) should be an option on the list at all timeds. Also, being my own electricision saves some nice $$ in the end. A man's gots to know his limitstions. Seriosly though with nothing else on you HT circuits helps to keep unwanted noise to a minimum, plus you know exactly what the draw on each circuit is.
post #2679 of 3341
Quote:
Originally Posted by Bill Mac View Post

I can't see how not enough ventiation could possibly cause the transformer in the A23 to hum. I've had my share of components over the years that have had transformer hum. I had bad transformer hum from a Sherbourn 7-2100A amp, PS Audio Quintessence Power Center and an APC H15 Home Power Conditioner. I found it very odd that two power conditioners would have transformer hum. I now have a Panamax 5100EX and it doesn't hum although I'm not sure if it has a transformer (I'm assuming it does). Most amps I've had in my system have had no transformer hum including a Parasound A52 which was dead quiet. All of my components definitely do not have the manufacturers recommended ventilation.

Bill
Interesting that you should mention that you had hum from the transformer of your APC H15. At the time I heard hum I thought it was from my 3-year old A51, which at the time I had on the shelf above my APC H15 power conditioner. Since then I have relocated the A51 across the other side of the room on a shelf that gives it more than 7 inches of clearance. Before it had about 5". My new A21 is now on the shelf above the H15 but which now has a little over 6" of clearance. All that aside, I assumed at the time it was the A51 because that's where the hum was coming from and you know it does get warm with 5 channels on board rated 250 watts each. That was back in the summer when my room temperature was ~80^o F. So far no repeats of the hum. YYY
post #2680 of 3341
Quote:
Originally Posted by coli View Post

Question: is there a technical reason why the JC1 doesn't accept bare speaker wires?

I would email Parasound about this specifically. This would get you the best answer.

service@parasound.com
post #2681 of 3341
Well I might offer safety as a possible reason. All it takes is one small strand of your stranded speaker cable to get bent out of place and it could short out the amp.
I would use spades if you don't like banana plugs. All you need is a crimping tool to connect them to your bare-ended speaker wire.
post #2682 of 3341
Quote:
Originally Posted by coli View Post

Question: is there a technical reason why the JC1 doesn't accept bare speaker wires?

For 400W amp, banana plugs or spades provide for better connection. Being it is John Curl's top design, guess he did not want to leave anything to chance.
post #2683 of 3341
Quote:
Originally Posted by coli View Post

Question: is there a technical reason why the JC1 doesn't accept bare speaker wires?
the JC1 does accept bare wire states it in the manual also
post #2684 of 3341
Quote:
Originally Posted by darrenbr View Post

the JC1 does accept bare wire states it in the manual also
but not recommended, read on
post #2685 of 3341
Quote:
Originally Posted by davee70 View Post

but not recommended, read on
Cant seem to find where it says not recommended
post #2686 of 3341
"The two five-way binding post speaker terminals on the JC 1 are connected in parallel and accept most
speaker wire terminations including single or dual banana plugs or 1/4” spade lugs. The openings in
the terminals are too small to accommodate bare ends of the gauge speaker wire you should use."
post #2687 of 3341
RE: JC1 speaker connections:
"What You’ll Need: Speaker wire (AWG 16 or thicker) with banana plugs or spade lugs. Stripped bare ends won't fit terminals"
post #2688 of 3341
^^ Guys, is this REALLY worth half a page of discussions? wink.gif
post #2689 of 3341
Do any of you guys know what a rough value would be on a Parasound 5125 amp? I'm looking at buying one used. I imagine it's probably a 5 or 6 years old. Original MSRP was $2k. Any idea of what a fair value might be? I've tried looking on Ebay,etc, but haven't found any comparables.
post #2690 of 3341
If you search on that one online auction site wink.gif and check the box on the left side that shows "completed listings" you will find a few 5125's and what they sold for. A quick search showed me one that sold for $700 one for $605 etc.
post #2691 of 3341
Quote:
Originally Posted by exm View Post

^^ Guys, is this REALLY worth half a page of discussions? wink.gif

I agree. I would never use bare wire as the possibility of stray wires causing issues is something I wouldn't risk. Oh boy here I am continuing the discussion eek.gif.

Bill
post #2692 of 3341
Quote:
Originally Posted by merrymaid520 View Post

My P5 is here and up and running!


Doing some listening while I can. Our new born is out with mom:)

Hi Merry, I'm interested in your opinion on the P5 compared to other preamps you've heard before.
post #2693 of 3341
Quote:
Originally Posted by merrymaid520 View Post

My P5 is here and up and running!


Doing some listening while I can. Our new born is out with mom:)

Brandon,

Well how does the P5 sound smile.gif? I'm hoping you are going to swap places with the Yamaha and have the P5 sitting above the A21 wink.gif.

Bill
post #2694 of 3341
Quote:
Originally Posted by perseus234 View Post

Hi Merry, I'm interested in your opinion on the P5 compared to other preamps you've heard before.

Hello. So far I'm really enjoying it! I messed with using different high pass XO settings with my EQ'ed subs but ended up with similar settings with my previous 2100. Overall it's very similar sounding to my 2100 and without A/Bing them it's tough to say. It's definitely great sounding. The only preamps I am familiar with is the parasound 2100 and proceed pre. I've enjoyed the parasoundd more so than the proceed.

Bill,
Hello!

I originally had the preamp above the A21 but I missed not being able to view the yamahas inputs on the display:(

I know it's not aesthetically as nice, but more functional!
post #2695 of 3341
Any P5 user's review yet? I have a Krell KAV-400xi integrated amplifier using the ht-bypass with a modded Music Hall DAC25.3 and a music fidelity v-lps for my 2 channel in my basement home theater set up. Looks like a P5 with the A21 amp can replace all 3 of these units for a neater look. Would this be an upgrade, sound wise? My front speakers are a pair of Thiel CS3.7.
post #2696 of 3341
Quote:
Originally Posted by merrymaid520 View Post

Quote:
Originally Posted by perseus234 View Post

Hi Merry, I'm interested in your opinion on the P5 compared to other preamps you've heard before.

Hello. So far I'm really enjoying it! I messed with using different high pass XO settings with my EQ'ed subs but ended up with similar settings with my previous 2100. Overall it's very similar sounding to my 2100 and without A/Bing them it's tough to say. It's definitely great sounding. The only preamps I am familiar with is the parasound 2100 and proceed pre. I've enjoyed the parasoundd more so than the proceed.

Bill,
Hello!

I originally had the preamp above the A21 but I missed not being able to view the yamahas inputs on the display:(

I know it's not aesthetically as nice, but more functional!

What are your speakers and what type of yamaha aventage do you have? I own RXA3020 and been thinking adding P5 or P7 into my system so I only need 1 sub in my room.
post #2697 of 3341
Quote:
Originally Posted by richardyc View Post

Any P5 user's review yet? I have a Krell KAV-400xi integrated amplifier using the ht-bypass with a modded Music Hall DAC25.3 and a music fidelity v-lps for my 2 channel in my basement home theater set up. Looks like a P5 with the A21 amp can replace all 3 of these units for a neater look. Would this be an upgrade, sound wise? My front speakers are a pair of Thiel CS3.7.

If the P5's phono stage is as good as the P7's it most likely will be an upgrade for LP playback.
How the P5 compares to the 400xi/MH dac 25.3 combo that is something only you can answer.
post #2698 of 3341
Quote:
Originally Posted by perseus234 View Post

What are your speakers and what type of yamaha aventage do you have? I own RXA3020 and been thinking adding P5 or P7 into my system so I only need 1 sub in my room.

I have the yamaha rx a3000 with Ascend acoustic Sierra towers with RAAL tweeter.
post #2699 of 3341
Quote:
Originally Posted by richardyc View Post

Any P5 user's review yet? I have a Krell KAV-400xi integrated amplifier using the ht-bypass with a modded Music Hall DAC25.3 and a music fidelity v-lps for my 2 channel in my basement home theater set up. Looks like a P5 with the A21 amp can replace all 3 of these units for a neater look. Would this be an upgrade, sound wise? My front speakers are a pair of Thiel CS3.7.
I have not heard the P5 myself. However, you couldn't go wrong by starting with the A21 using the pre-outs on the Krell and then see if you're satisfied with that combo. If not, then you could pursue further upgrades with your other components.
post #2700 of 3341
Just Purchased a JC2 to play back my to 2 channel . I did not not get the BP as both my blu ray players, Oppo 83,& Pio SC-05, have 7.1 outs.I use the FL& FR in to the JC2. I just had a bad heart attack so I replaced my Bryston BP20 with the JC2 to help with the constant ups and downs to manually control the preamp that was so easy a few few weeks ago yet so hard now. I got a great deal from AudioAdvisor.com. The demo, in black, 2999 shipped and no tax. Comes with full 5 year warranty. It has incredible sound already!. I am using a Halo A52 THX 5 channel amp. This may be the best sounding pre amp I have ever owned. My B&W 805 signatures are smoking right now without even hooking up my sub. For cd playback I have a Krell Showcase DVD and a Bryston BDA-1 DAC and a Rega P3-24 for Vinyl. My recovery is going to be slow but the JC2 is making my time at home a lot easier. biggrin.gif
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