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lpv's picture
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RE: completely puzzled !!!

Dear all. 

this is what i did: 

 

swaped rotel ra-11 with marantz pm 6400, added arcam rdac. kept q300.. music comes from macbook pro... simply amazing !!! rotel and marantz is like night and day... rotel - flat, dull, cold, clinical, no bass at all, clipping at high and low frequencies as I described above !!! listened rotel for a week and hated every day... kef's with rotel were lifeless and really poor. 

first few minutes with marantz and rdac and everything changed.. for good... rich and smooth bass, sweat treble.. lovely midtons.. all started to sing... 

itunes sound enhancer off, itunes eq off and sound from marantz, arcam and kef ? spot on Smile love it !

did try rotel with rdac.. built in rotel's dac is lower sq than arcam rdac... rotel is simply not for my taste.

enjoy the music !!!

 

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RE: completely puzzled !!!

Glad you got it sorted. Smile

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RE: completely puzzled !!!

Does it need to be on full volume to ensure a bit perfect feed?

I noticed that the app., Bit Perfect, turns my Mac's volume to full whenever I'm taking a feed from the optical output. It is noticeable that I have to run my amplification at a lower volume when the imput comes from my Mac than when using the CD section or taking a feed from other devices.

Stuff.

lpv's picture
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RE: completely puzzled !!!

I believe Overdose explained it best.. please check his post above.. he came to the conclusion that it's Rotel limitations...

I've got the same with Rotel amp.. feed from CD player was ok in terms of volume but when switched to mac optical it was too much, hence clliping... turning down volume in itunes to about 75% helped... 

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RE: completely puzzled !!!

Do you mean Marantz 6004?

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RE: completely puzzled !!!

No, the Marantz is the amp that replaced the Rotel.

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RE: completely puzzled !!!

you mean pm6004 becouse I cant find a model named pm6400, Im about to replace my ´pm6004 to a rotel ra-11 for better sound?

Tannoy Revolution DC6se, Harman kardon Hk3770, Jbl studio 260p subwoofer.

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RE: completely puzzled !!!

lpv wrote:

Hi all.

Would you please watch this video I've made. I recently bought Rotel RA-11 with Kef Q300. I've posted some questions on this forum how to set up my amp and speakers to work with Macbook Pro. I'm completely puzzled with what I can here from the speakers. Here's the video to demonstrate 

http://www.youtube.com/watch?v=IhnZ7J8lSjQ&feature=youtu.be

Soud enhancer on mac is switched off, no equalizer, just bass +4 and trable +4 on Rotel ... and I'm getting this weird clipping on high and low frequencies. So last few days instead of enjoy the music I'm woried to even turn any music on. This is happening with majority of tracks. What I'm doing wrong?

I'm using new cables for speakers as well as new optical cable to connect mac with amp...

with the old, cheap and simple sony amp and speakers I could turn on sound enhancer on mac and do whatever I want with eq settings and never got any clippling/ distortion.. with rotel and kef I can't even think of sound enhancer to be on and need to be very carefull with eq in itunes.. in the best world just turn it off... but then the music sounds dull, lifeless... 

is it something faulty? any component of my new hi hi? 

it's not something I expected !

any help please? advice?

Glad you got it sorted but did you not have the tone controls turned up on the Rotel that may have explained the distortion?

lpv's picture
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RE: completely puzzled !!!

busb - I did try all possible connections/ settings in itunes, on mac and on rotel... 

zax - I would stronglty suggest you audition rotel ra-11 before spending money... rotel produce really clinical sound.. lots of midtones and lack of bass.. cold sound.

Please tell us more about your set up... I don't know what you streaming from, what is your source? Mine is 100% macbook. If that's the case in your situation I can highly recommend adding decent DAC. I bought for Marantz 6400 Arcam rDac... and like I said before - warm, open sound with right amount of low, mid and high frequencies... works a treat with Kef Q300. 

Rotel RA-11 cost £499 at the moment. 

Marantz PM6400 £229.95 + Arcam rDac £229 [ bought from Richer Sounds] = £458.95... cheaper and works much better for me then Rotel Smile

if you've got any questions about Rotel I'm happy to help.. but please audition it first !

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RE: completely puzzled !!!

I should mention - mac's audio midi setup: 96khz, 24 bit [ early 2011 model allows up to 96khz]

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RE: completely puzzled !!!

lpv wrote:

...I would stronglty suggest you audition rotel ra-11 before spending money... rotel produce really clinical sound.. lots of midtones and lack of bass.. cold sound...

Hi lpv

I have to diagree with you in terms of what you say about the Rotel 'sound'...yes, more clinical but I would not say either 'really clinical' or 'lots of mid tones and lack of bass'.  I am running the same setup as you had and find the whole ensemble very nicely balanced...just the right amount of detail and bass...which the Q300s convey superbly...and in my opinion the Rotel is a better amp (but only marginally) than the Marantz....but there is the subjective nature of HiFi.

I do very, very much agree that auditioning is required (and if the dealer is any good then the set-up to be auditioned will at least have been warmed up overnight before the session. Wink

Good luck with yo new combo/glad that you are sorted to your satisfaction. :grin:  

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RE: completely puzzled !!!

I much value your opinion Baldrick:) 

I still have both amps and listening them side by side. Can't get bass on Rotel where I want it to be. As I mentioned before..

I've connected rDac to Rotel to bypass Rotel's built in Dac and Rotel's got audible worse sq to arcam rDac. 

.. but then obviously we can't comment on someones different tastes...

I'm glad you happy with your set up:)

 

lpv's picture
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RE: completely puzzled !!!

.. or my rotel amp - as some people suggest - is simple defective Sad

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RE: completely puzzled !!!

I am not a big fan of the Rotel sound, if that's what it is. But it is odd to have a digital input clipping an amp like that.

The big screaming detail in your original post is the 'bass and treble up to 4.' That is by far the most obvious explanation for what is happening. I had a pair of Q300s and I do not have a single negative thing to say about them - brilliant speakers for the money, as hyped. But my Q300s spent most of their time hooked up to a Naim Nait 5 (45W x 2, similar to the Rotel), and I can say that they need a lot of juice. The Nait drove them really well, but the volume knob was well into the early afternoon to get big sound out of them. That Rotel does not have the grunt of a Nait 5, and if you are pushing the amp at all, with a low-efficiency speaker like the KEFs, the Rotel's 40 watts are pumping. Then you roll the bass knob up to four. I couldn't find an impedence graph for the Q300 online but other speakers based on the Uni-Q driver have thier lowest impedence dips right around 100-200 Hz and at around 10K - basically exactly where the extra boost from the bass/treble knobs is. You are asking too much of a 40W amp.

Have you tried the old setup without the bass and treble boost? If you are saying that the bass is so bad that you have no choice, then something is wrong - especially if there are problems at low volumes. But I do present the following audiophile axiom: If you can only deal with your amp because it has bass and treble controls, it is time for a new amp. Like, sit down with your wife and declare an emergency.

 

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RE: completely puzzled !!!

it's all deicided and Rotel goes back to dealer.. marantz sounds better with it's bass and treble controls.. I wonder what people do when using amp without it? ... all records are recorded in different way/ fashinon... let's say one cd is bassy enough and the other lacking... what would you? when you re not have an option to add or reduce some bass when you need it? I wonder how some expensive amps ( without these knobs) cope with different genres, productions? 

I know some very weird behaviour of a guy who - back in days - traveled to numbers of countries to get 'these cable' to get 'this componet' to his hi fi and the music he plays on his stereo never felt inspiring.. he ended up listening to classical music only because that was the only one that sounded good on his eq.. I dont even remember what was it, but there was only one knob on his amp, volume.. 

 

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