Hello, Yes, I can work on the Parasound HCA-2200II. Please contact us at Service@nelionaudio.com for more details. Thank you!

Do you mod or refurbish Parasound HCA-2200ii? Mine is humming and a place in the Midwest stopped modding them. I also have a M1.0t in good condition to mod. Which do you think would sound better? thanks

After shipping my M-4.0t and CT-7 preamp, I decided to go with the audiophile restoration instead of the basic restoration. The work is beautiful, and I will be a while getting used to the smooth, quiet, powerful sound that comes out of this restored combination. Even with hearing damaged from age, military service, and a career in restoration carpentry, I can hear wonderfully. For the first time, I am leaving the bass, mid-range, and treble controls set flat, and love the sound. This is money invested, not spent, on some of the best sound that I could ever afford. I am thankful to have e

Hello, Yes we need to schedule you in. Please contact us at Service@nelionaudio.com Thank you!

Yes indeed - that is repairable.

Do I need to schedule the work, or just send the unit to you?

Unlimiter and autocorrolator circuits do not work as should. Volume control has loud clicks at lowest settings. Repairable?

I worked as an electronics restoration tech for many years. I saved a smoke-damaged M500 from a fire, meticulously cleaning it with pressurized DI water and surfactant. I used the amp for years until one day my wife's friend plugged a 3.5mm adapter from the input directly into her phone, cooking the right rail as the phono jack shorted. I fixed the first stage, but as the current came up it cooked again. Greg fixed my baby, making it better than ever. This amp means more to me than any other physical possession. Just do the MKII service--it's cheaper than buying many consumer recei

We use OPA2134. However the pinouts are quite different, so you have to use an adaptor.

What is the upgrade to the RC4136 IC chip in the C9?

I got this C-4000 several years ago second hand. Opened it up to replace Power board caps. Someone modified the motherboard by cutting traces, modified power switch (looks to be in headphone section?), and jumped from power board to motherboard. In reading schematic, there is a difference between the original board and the later versions, I wonder Is this a factory/service mod? Has anyone seen? Main question is; do I put back to stock or try and recreate the modification, in which case I need to get signal to the motherboard. The cut traces and bypass power switch are in image 3.

Thanks. I'll contact you tomorrow.

@Mike16w Oh no! Well, we can certainly take care of it. Hit us up at Service@nelionaudio.com! Or go to the homepage and hit the Contact Service button on the right sidebar.

Thanks. I'm having multiple issues with the amp and thinking about sending it in to you for repair/upgrading. Smoking transistors and resistors. Been too many years since I was a bench tech and the direct coupled layout has me getting frustrated.

@Mike16w Please use 0.47ohm 2W resistors. Good luck with the restore!

I have a Carver M 500 that I am trying to restore/fix. There is 4 resistor blocks (R170-R173). My amp does not have the resistors soldered on the top of these blocks. What value and wattage should I install? Thanks Mike

Changed Price to 350

No. Just normal hook up so I can listen to 4 speakers. I am looking for some splitters and cables so I can use the MXR as a third amp and hook up all 6 speakers.

Are you using them bridged?

Missed you guys at Carverfest. The M200's are sounding great and pumping those Cerwin Vega's very well.

Hello, I can restore the C-500. They are very similar to a Phase Linear 700 - brute force linear power supply and gobs of output transistors. Restoration includes cleaning inside and out, replacement of consumable parts, upgraded components where appropriate, calibration and testing. 3 year parts and labor warranty. $400 + shipping.

I haven't seen any restoration info on the Carver C-500 power amp, any recommendations?

Can't wait to send my C1 in for service. Love my Carver gear!

Thanks @RobA! Welcome to the forums!

It took me awhile to get here but hey, I am here. Excellent work on the MXR-150 back in April Greg. Still working great and the little scratchy sound in the tape knob is completely gone. But the new car smell is gone. LOL