Hi everyone
I am wondering if someone could help me interpret the following info:
I am using a meridian 101/103 setup for 30 years now and would like to upgrade the power amp.
The Meridian 101 pre output values are:
0dBm (775mV) for rated input (120mVrms at 1kHz) behind 600ohm.
Max output +20dBm
Tape output -20dBm behind 5hohm
As I can not interpret the given values, I would like your oppinion if this pre amp can be used with any of the followin power amps:
ROTEL RB 06
Audiolab 8000P
Rotel RB 870 BX
Best regards
Ricardo
I am wondering if someone could help me interpret the following info:
I am using a meridian 101/103 setup for 30 years now and would like to upgrade the power amp.
The Meridian 101 pre output values are:
0dBm (775mV) for rated input (120mVrms at 1kHz) behind 600ohm.
Max output +20dBm
Tape output -20dBm behind 5hohm
As I can not interpret the given values, I would like your oppinion if this pre amp can be used with any of the followin power amps:
ROTEL RB 06
Audiolab 8000P
Rotel RB 870 BX
Best regards
Ricardo
Re: Re: Meridian 101 pre amp needs new power amp
And why would that be? The 775mV is RMS at 120mV input. At a standard CD level input the output will be sufficient to overdrive any power amp bar the F4.
So, to answer the original question - yes, the 101 will drive to full power practically all of the listed power amps. Whether any of them will be an upgrade for the 103 is a different question.
On second thought: there might be a chance of the preamp input getting overloaded with standard CD sources. This will depend upon topology. No problem if the volume pot is at input, otherwise a simple attenuator may be added to the cd input.
nigelwright7557 said:
And why would that be? The 775mV is RMS at 120mV input. At a standard CD level input the output will be sufficient to overdrive any power amp bar the F4.
So, to answer the original question - yes, the 101 will drive to full power practically all of the listed power amps. Whether any of them will be an upgrade for the 103 is a different question.
On second thought: there might be a chance of the preamp input getting overloaded with standard CD sources. This will depend upon topology. No problem if the volume pot is at input, otherwise a simple attenuator may be added to the cd input.
Re: Re: Re: Meridian 101 pre amp needs new power amp
Hi
So I can expect no real improvement changing to one of the proposed amps ?
I would apreciate your comments because I did not hear any of the amps I quoted.
The CDP sounds a little too high but does not distort.
The sound is quite good in the Tuner "buffered" input.
Regards
Ricardo
analog_sa said:
Hi
So I can expect no real improvement changing to one of the proposed amps ?
I would apreciate your comments because I did not hear any of the amps I quoted.
The CDP sounds a little too high but does not distort.
The sound is quite good in the Tuner "buffered" input.
Regards
Ricardo
Your pre-amp...
1) raises 120mV to 775mV and hence has a gain of x 6.5 . (Note that 775mV is a standard reference level in the professional audio industry, and hence this is why the Meridian is specified reference this level).
2) has a maximum output of +20dBm which is (if I recall accurately) 7.75 V across 600 Ohms.
The Rotel RB 06 and Audiolab 8000P require about 1 V for full output, so you should have no problem with driving them from your pre-amp.
Both of these amps seem to work well at their price points.
1) raises 120mV to 775mV and hence has a gain of x 6.5 . (Note that 775mV is a standard reference level in the professional audio industry, and hence this is why the Meridian is specified reference this level).
2) has a maximum output of +20dBm which is (if I recall accurately) 7.75 V across 600 Ohms.
The Rotel RB 06 and Audiolab 8000P require about 1 V for full output, so you should have no problem with driving them from your pre-amp.
Both of these amps seem to work well at their price points.
Re: Re: Re: Meridian 101 pre amp needs new power amp
Most amps need at least a couple of volts to get the full specced output level. My CD player puts out about 3 volts peak to peak.
If he is just playing the amp in his living room then fine, but if like me he is performing discos then he would need the correct input volts to get the most out of his amplifier.
analog_sa said:
Most amps need at least a couple of volts to get the full specced output level. My CD player puts out about 3 volts peak to peak.
If he is just playing the amp in his living room then fine, but if like me he is performing discos then he would need the correct input volts to get the most out of his amplifier.
Re: Re: Re: Re: Meridian 101 pre amp needs new power amp
He doesn't need any more gain. Less would probably be better.
The 101 pre output is +10dB to +20dB more than almost any power amp needs for full power.
Has the 101 got trim pots on the inputs to balance levels between different voltage sources?
The pre has a gain of +16dB (*6.5).nigelwright7557 said:
He doesn't need any more gain. Less would probably be better.
The 101 pre output is +10dB to +20dB more than almost any power amp needs for full power.
Has the 101 got trim pots on the inputs to balance levels between different voltage sources?
Re: Re: Re: Re: Re: Meridian 101 pre amp needs new power amp
Thank you all.
I was starting to believe these 101 where forgotten.
The 101 does not have any trim pots inside.
As I wrote before, I am not having any distortions or clipping problems but the CDP plays louder than the Tuner (... just 5 min on the pot).
My normal listening is done at 12 oclock pot position and I believe the sound could be better if I used less attenuation on the pot.
As I am using the Tuner input "buffered" for the CDP (the sound is so much better), a friend sugested I should raise R5 and R11 to 1k in order to lower the buffer signal output..... Did anyone try this before ? I am afraid to experiment too much and also afraid to loose the beautifull freq resp balance.
In the link below you can dowload the 101 schematics:
http://www.doebbe.com/hifi/items/meridian101.html
Best regards
Ricardo
AndrewT said:
Thank you all.
I was starting to believe these 101 where forgotten.
The 101 does not have any trim pots inside.
As I wrote before, I am not having any distortions or clipping problems but the CDP plays louder than the Tuner (... just 5 min on the pot).
My normal listening is done at 12 oclock pot position and I believe the sound could be better if I used less attenuation on the pot.
As I am using the Tuner input "buffered" for the CDP (the sound is so much better), a friend sugested I should raise R5 and R11 to 1k in order to lower the buffer signal output..... Did anyone try this before ? I am afraid to experiment too much and also afraid to loose the beautifull freq resp balance.
In the link below you can dowload the 101 schematics:
http://www.doebbe.com/hifi/items/meridian101.html
Best regards
Ricardo
Thank youGordy said:
This is exactly the kind of explanation I was looking for..!!!
AndrewT said:
I am waiting for a good friend´s help in order to proceed with the refurbishment.
My 101 does not seem to have balanced output. I believe the 105 was sold with the 101b (with balanced output).
I am not sure of this statement but would apreciate your comments.
Best regards
Ricardo
AndrewT said:
I Andrew
It was a very succesfull mod.
Next will be the caps of the 101 preamp.
I will need all the help I can get so I can not afford to get binned.
I did not say the freq response was altered... My first impression is tighter and more detailed bass.... for now.... I must wait a few days.
I believe good caps can give more speed and attack as well as lower compression to the sound.
Thank you for your reply
Regards
Ricardo
We don't sin bin people for disagreeing . We generally bin them for being disagreeable Attacking another member personally or making the same argument on a daily basis to harass another member can work also.
Andrew knows this so is just trying to scare you I suppose. He is entitled to his opinion of course
Now Ricardo we DID ask you to cut your siglines down to three line maximum, as that is the policy here.
Mark
Attacking another member personally or making the same argument on a daily basis to harass another member can work also. Andrew knows this so is just trying to scare you I suppose. He is entitled to his opinion of course
Now Ricardo we DID ask you to cut your siglines down to three line maximum, as that is the policy here.
Mark
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