Marantz PM66 KI tweeks

[Fidelity Audio]

Hi

I am new to this brilliant forum (can't believe I never found it before).

I have for the past 6 months been heavily modding my CD63 KI and the results have been fantastic.

So I have turned my interests to the KI amp.

So far I have changed C705/706/751/752 for equivalent Black Gates

C717/718/719 for uprated Black Gates.

C709/710/753/754/755/756 to equivalent silver mica types

The results have been very good indeed, bringing new life to the amp.

I was wondering if anyone here has done similar mods and has any more pointer for me.

cheers

[SimontY]

Hi rowemeister, and welcome to the forum.

Originally posted by rowemeister
I have for the past 6 months been heavily modding my CD63 KI and the results have been fantastic.

I'd love to know all about your mods to this fine (when modded to kingdom come) CD player, pehaps in another thread.

I'm afraid I don't know much about modding amps, but make sure your mains and internal power supply is good. This is perhaps the single most important factor for sound quality in an amp. If you prefer a smoother sound run your amp off a large isolation transformer. I personally love the way amps sound on wooden feet - try Russ Andrews' Oak Cone feet [if you haven't already].

As for internal considerations, I'd rather leave that to those that know better!!

[Fidelity Audio]

Yeah.

I will compile a list of the mods. I have changed over 90 components. lol

I think I will change the mains lead to a quality one on the Amp too.

[davecooper]

Rowemeister. Have you completed your list of mods yet? I am about to change the speaker terminals on my KI for something better and have decided to carry out a few other mods at the same time. Would love to hear what you have done. Do you have a schematic for the amp?

jabba@jeana.freeserve.co.uk

[Fidelity Audio]

I have done quite a few mods to this amp now so I thought I should post a pic.
The most noticable mod is the rather small res caps. lol

The bass is very good from these caps and no loss of treble etc.

[SimontY]

Wowsers, looking good Brent. Let us know how it sounds after more listening.

[Fidelity Audio]

Simon

Upon a few hours listening at work and at home I can confirm the bass has more weight with no side affects towards treble or mid range.

The bass seem effortless helping with resonance on piano or double bass.

I will give it a good long listen over the weekend.

Brent

[Fidelity Audio]

Here is my little mods list.

Open with notepad.

[SimontY]

Nice mods Rowe, any more plans for the amp now? Or are you just going to enjoy it for a while?

[Fidelity Audio]

Originally posted by SimontY
Nice mods Rowe, any more plans for the amp now? Or are you just going to enjoy it for a while?

You know me, I say im leaving things alone and then 10 mins later decide to change something.

To be honest there is a lot less to do to an amp than a cdp.

Brent