Modding/tweaking my system


Hi all

I thought I would start this thread almost like a diary.

After living with my system for 12 years, purchased 2nd hand, i find myself wanting to see if i can improve on the sound.

I tried modding a Marantz cd67 player years ago with some success then went too far and wrecked it.

The system is 

Rotel RCD02 cd

Cambridge Audio Dacmagic

RC03pre amp

2 RB03 power amps running as mono blocks

PBC FB1

The first thing I wanted to do was tame the overly bright high end by modding the PMCs to + after years of searching I finally found the crossover layout bought the parts and set about the mods.

1st impressions are the highs are tamed however I have 1 speaker that "sounds" louder than the other, more on that later.

I bought the Dacmagic el-cheapo without the box or instructions. I recently downloaded the instructions and realised the Spdif requires the use of a 75ohm digital cable, I've been using a standard RCA all these years.

The room, HiFi and speaker placement are far from optimal but it is was it is and cannot be changed.

I noted I can feel the CD chassis vibrating with music at reasonable levels so that needs a change.

The overall voicing of the system I would describe as slightly forward with a muddy mid range.

It's the highs and mids I'm looking to resolve.

 

notdeadyet

@notdeadyet Here's the link to create your system: https://systems.audiogon.com/ just click CREATE SYSTEM on top right. 

I’m saying that you have many interesting comments about your journey and a system page with photos is a great way to show what you have, let others comment & ask questions about it, and over time as you make changes, we can easily follow your path and learn from it.

One of my favorite ways to learn here is to gain insight into how member’s choices and decision process evolve over time. Occasionally, prospective purchasers might ask for your insights to their situations.

Just a thought for you to get more enjoyment from the forum. Cheers,

Spencer

Just a quick update 

The right hand speaker still seems brighter than the left, but not on all recordings.

I may Have to pop the x-over check the resistor and reflow the solders?

The Sorbothane isolators have arrived today so warming the old girl up and will pop em in later, not expecting any change but a £10 tweak is worth a go.

 

Looking at your setup...I would be inclined to address the placement of your speaker system in your room... along with a readjustment of the room layout to be conducive to a proper setup.

You're on the right track with what you're doing but the things you're using are getting all the poor results I would expect. That mat material you're using is more for quieting cars than audio gear. A much better material is TA-102 fO.q tape. This damps micro vibrations revealing inner detail without losing bass or dynamics. Looks expensive but a little goes a long way.

Pull your speakers out into the room. Close to the wall muddles imaging and muddies bass. Worst is the rack by the right speaker, reflections off that are bad. Use a tape measure to align the speakers absolutely equidistant and symmetrical. Then experiment with toe. You will probably want them toed in a lot more for better imaging. But this is a tradeoff, you get better imaging and less room effects being toed in a lot, but also more direct might exacerbate your bright top end. Only you can decide the right balance. 

Get some Nobsound springs and put them under everything. These will clean up a tremendous amount of grunge and smear and get you a more natural sound. Springs are sensitive to loading. By adjusting and listening you will be able to tune your system to a lot better sound. It will take some time to figure out the best combination but it will be well worth it as you will be able to tame that top end without losing anything in the process.

Bear in mind a certain amount of top end glare will always be there simply due to what you are using. But there's an awful lot you can do to ameliorate it without trying to mask it creating problems in other areas like with the mat stuff you tried.