I have a HCA-1500 with bad left channel ... shorted output drivers ... so it's time to go ahead and do a recap at the same time. I'm having a shop do it, but wondering if there are commonly accepted devices that are worth considering an upgrade.
The power supply specs on the Parasound site are 60,000uF (Nichicon), but my unit must be later in the production line, as it has a higher rating of 80,000uF (Elna).
I notice that Wima film caps seem popular, sometimes in place of electrolytics, so I'm wondering how this decision is typically made.
Yes, I'm having a shop work on, but I know John pops up here on occasion, and if he, or anyone else, can recommend even a few smart updates, I would appreciate it.
Part of why I am keeping this amp and having it worked on is that it is a fantastic value. It's affordable audio muscle that sounds great in my system and there is no way I can replace with anything that will sound better.
Thanks John!!
The power supply specs on the Parasound site are 60,000uF (Nichicon), but my unit must be later in the production line, as it has a higher rating of 80,000uF (Elna).
I notice that Wima film caps seem popular, sometimes in place of electrolytics, so I'm wondering how this decision is typically made.
Yes, I'm having a shop work on, but I know John pops up here on occasion, and if he, or anyone else, can recommend even a few smart updates, I would appreciate it.
Part of why I am keeping this amp and having it worked on is that it is a fantastic value. It's affordable audio muscle that sounds great in my system and there is no way I can replace with anything that will sound better.
Thanks John!!
I wonder if you ever found an answer to your question? I am in a similar position, with a new to me HCA 1500a. I am finishing a complete rebuild of my second set of vintage Polks and I wonder if it is time to expend some time, money and effort on my Parasound. I don't have a problem with how it sounds presently, but I also thought the Polks both sounded good BEFORE I rebuilt the crossovers. The crossover rebuild and a few other easy mods brought the speakers to an entirely different, much improved, level. I am wondering if something similar is possible with the amplifier????
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I'm also considering a rebuild of my 1500
Any body done a rebuild of their HCA1500a? I have bulging power caps. The amp is working fine but I'm thinking of going through the all the electrolytics or building a class d?
Any body done a rebuild of their HCA1500a? I have bulging power caps. The amp is working fine but I'm thinking of going through the all the electrolytics or building a class d?
This amp's circuit design is good. Upgrade with normal recap, replace resistor is OK.
If we change a higher driver current, you will have a more warm, dynamic and punch bass performance. To do that, remove two 100R resistors R119,R120 and replace a 47R 2W connect between two driver transistors. After mod reset bias.
If we change a higher driver current, you will have a more warm, dynamic and punch bass performance. To do that, remove two 100R resistors R119,R120 and replace a 47R 2W connect between two driver transistors. After mod reset bias.
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I started a thread before seeing that this one just suddenly got active on similar subject. Unfortunately my posts are being moderated, so there are other things i've posted which have not hit the thread. Hopefully we'll get more info. Thank you patrick101 for the help!
Parasound HCA-1500A repair and possible upgrades
Filippo
Parasound HCA-1500A repair and possible upgrades
Filippo