Clipping of audio sytems - Help needed

[admin_exported]

Hi ,

I have a doubt - --- though tried to gather information on this ....left me confused ....

I have been hearing my Marantz PM7001 (70W at 8 ohms and 100 at 4 ohms) with Quad 11l2 (85W at 6 ohms) along with CD6003 for the past one and half months ......All of them are brand new systems .......

it was quite good .......as days went by the Bass has increased and Treble has come down considerably ...........now the sound is not as good as it used to be earlier ....also I feel the level of detailing has gone down ...............the bass is not very solid .... is this a result of Burn out ......OR is this clipping of speakers ? .....i dont play the system with the volume knob beyond the 11 O clock position .........how do i find this out ?....

Also before buying i did a lot of googling ........paid attention to the specs and then purchased this combo .............given the specs of my speakers vis a vis the amp ...is clipping possible ? My Logic was if Quad is giving a continuous output of 85 W at 6 ohms......then at 8 ohms it would come somewhere close to 70 W .......also Marantz generally has a higher output than they declare ...... What is the time it generally takes for the Burn out to happen in case of Amp and Speakers ?

http://www.hifivision.com/editpost.php?do=editpost&p=138076

 

[drummerman]

More likely is that your new speakers have settled down. Not always a good thing as I have mentioned in the past, especially not if you preferred them new/out of the box ...

 

[Anonymous]

thanks Drummerman ....so all the new systems have settled down to give me a sound which i am not quite happy with ...........maybe i will get used over a period of time ...

One thing which i have noticed is that I have to now keep the volume a bit higher if I have to hear low frequencies ......mid and highs are ok ...

given the specs of Marantz and Quad 11L2 is clipping of speakers
possible if i raise the volume ? . Which are the other bookshelf speakers (bright ones - after settling down ) which would go down well with Marantz ...

Marantz PM 7001 - 70Watt/Ch Into 8 ohm /100 Watts/Ch Into 4 ohm

Quad 11l2 -

Power Handling (watts) : 85 watts (continuous Programme)

Recommended amp power(watts) - 30 -150 watts

Sensitivity (db) : 86

Nominal Impedance (Ohms) 6

Frequency response (Hz) - 45 - 28,000
Upper frequency limit: 32,000

Drivers : HF: 1" (25mm) soft-dome with Neodymium magnets and aluminium voice
coil
LF: 5" (125mm) woven Kevlar

 

[drummerman]

Yes. Clipping is possible if you play to loud.

 

[Anonymous]

It could be somthing else too. When setting up a new system you can get very excited and happy about the upgrade from what you had before. As time goes by and that feeling wears off you start hearing faults or just different things that you did not hear when you was excited about your new system. Give it a few more weeks and also try to move your speakers abit as that can have a huge impact on the sound.

 

[Anonymous]

I suspect Joestone has touched on the answer. The position of the speakers can make a huge difference but also where you sit. If your ears are the same distance from the back wall as the speakers are from the front wall - all sorts of odd things happen. The position of furniture can absorb high frequencies and sitting with a curtain (or similar) behind you can leave you with the 'dead' sound you seem to be describing. Thick carpets will also deaden the sound somewhat.

To get a 'lively' sound that you seem to seek you must be in a lively place. An extreme example would be to listen in a conservatory. I am not recomending that but if you did, the sound would be totally different. For some reason the British take little notice of the room acoustics but the Americans understand that the room may have to be tuned as well as the HiFi system. Now that British houses are virtually all built with plasterboard walls, instead of hard plastered walls, getting good sound is more difficult. HiFi shops do not universally recognise this (I went to one with a suspended ceiling!) but most listening rooms will be set up to give better results than you may find at home.

Before spending any more money on HiFi try moving things around and try to get something reflective behind you. If possible try your kit in the emptiest, most reflective room possible. If you still don't like it, that is the time to consider changes.

One last observation, some recomended cables really do rob the sound of high frequencies. For example, 'QED Silver Anniversary' ruined the sound in my system. Have you changed anything recently?

 

[Anonymous]

Hi ...thanks all ...

No I have not changed anything recently ...i can fiddle around with the treble controls in the amp ...currently its in source direct mode ....but i have this inkling that some amount of clipping has taken place ..... or maybe i can try and plug the bass ports in the rear ...