Berendsen
Hi,
This schematic reminds me of a Berendsen mono amp that I had for service ones.
The Berendsen was balanced out but the schematic of one half of it looks very much like this schematic.
Do you have more information about this amp?
Best regards,
Audiofanatic 😉
Hi,
This schematic reminds me of a Berendsen mono amp that I had for service ones.
The Berendsen was balanced out but the schematic of one half of it looks very much like this schematic.
Do you have more information about this amp?
Best regards,
Audiofanatic 😉
Information
This new masterpiece from MB* fulfils the wishes of all the music lovers who want a com-pact and elegant audio reproduction system without any compromise in sound quality.
The power section of the mb* 7008 is designed with a double-mono construction, using 2 separate power boards. For optimal operation, the heatsink is on the top - this design creates the shortest signal path and the most homogenous temperature field for lowest thermal distortion. You will be surprised by the control of the power amplifier stage and you will feel that you have virtually limitless amounts of power available. The second surprise will be the total lack of coloration of the unit - what's left is only the beauty of the music. This is one of the rare amplifier designs where a solid-state amplifier is able to reproduce extremely difficult instruments with pure fidelity, without introducing distortion.
120W Rated Power :
Output Voltage max 35 V peak
Output current max : 20 A peak
Input Impedance :
10 kW, RCA
10 kW, XLR
Input Sensitivity : 1,5V, 185 W, 4W
S/N ratio unweighted : 111 dB
S/N ratio A-weighted : 115 dB
Frequency Response :
Mono/Stereo DC - 130 kHz
Distortion : <0.006%, 4 W, 1 kHz, 50 W
Damping Factor : 300 (4W)
Power Consumption :
4 VA sleep mode
47 VA (Idle Mode)
450 VA (max.)
This new masterpiece from MB* fulfils the wishes of all the music lovers who want a com-pact and elegant audio reproduction system without any compromise in sound quality.
The power section of the mb* 7008 is designed with a double-mono construction, using 2 separate power boards. For optimal operation, the heatsink is on the top - this design creates the shortest signal path and the most homogenous temperature field for lowest thermal distortion. You will be surprised by the control of the power amplifier stage and you will feel that you have virtually limitless amounts of power available. The second surprise will be the total lack of coloration of the unit - what's left is only the beauty of the music. This is one of the rare amplifier designs where a solid-state amplifier is able to reproduce extremely difficult instruments with pure fidelity, without introducing distortion.
120W Rated Power :
Output Voltage max 35 V peak
Output current max : 20 A peak
Input Impedance :
10 kW, RCA
10 kW, XLR
Input Sensitivity : 1,5V, 185 W, 4W
S/N ratio unweighted : 111 dB
S/N ratio A-weighted : 115 dB
Frequency Response :
Mono/Stereo DC - 130 kHz
Distortion : <0.006%, 4 W, 1 kHz, 50 W
Damping Factor : 300 (4W)
Power Consumption :
4 VA sleep mode
47 VA (Idle Mode)
450 VA (max.)
Attachments
I may be dumb but to me it looks like a mediocre opamp driving a follower. Not sure what is the advantage of the opamp rails referenced to the output.
You sound like your one of their salesmen.
OPamp front ends seem like a cheat to me. Why do you want 2 output stages? (one in the OA one in the amp)
OPamp front ends seem like a cheat to me. Why do you want 2 output stages? (one in the OA one in the amp)
I'm glad someone else feels this thread is almost a sales pitch !!
I was half expecting the price and P&P charges to have been listed by now.
Andy
.
OPA445 is a bad op amp for audio from my experience.
They are high voltage, yes, but that s all...
I still have a bunch that i got from a friend that work in a factory.
They use them to drive power op amps used in motors driving circuits...
They are high voltage, yes, but that s all...
I still have a bunch that i got from a friend that work in a factory.
They use them to drive power op amps used in motors driving circuits...
The amp in question has a retail price upwards of $5K - just guessing I don't know for sure and it is probably even more expensive.
When you take that into consideration do you still think that someone posting about the amp on diyaudio is a salesman? Selling what? ... the amp itself? Can't sell pcb or a kit of the design either because it is a commercial product.
This is not a bad design. There is a lot going on that is worth a closer look: the opamp rails referenced to the output for example. That explains the choice of opamp and gives it a different twist.
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5000$ ?......
It doesn t worth that sum..
It use old dirt cheap darlingtons BDV64/65.
A minimum would be to use superior Sanken devices, but i suppose
that the profit return ratio was the most studied equation when
designing this amp....
Hi,
help needed! If that thing should be generally regarded as a masterpiece of german engineering I´d like to emigrate and humbly search for asylum 😀
jauu
Calvin
help needed! If that thing should be generally regarded as a masterpiece of german engineering I´d like to emigrate and humbly search for asylum 😀
jauu
Calvin
Manufacturing quality is very good, as usual with german goods,
but the design and components used are at odd with its philosophy...
Pcb
Hi ANADIGIT,
Why don't you send two boards to me, I'll test them and report later.
I will send them back to you when I'm done testing them.
Best regards,
Audiofanatic 😉
Hi ANADIGIT,
Why don't you send two boards to me, I'll test them and report later.
I will send them back to you when I'm done testing them.
Best regards,
Audiofanatic 😉
No problem !
What's your address ?
I'll send my amplifier to you !
But...you have to pay me for garantee your honnest 😀
I'm not a seller, I bought from "audiogon"
Thanks
Anadigit
What's your address ?
I'll send my amplifier to you !
But...you have to pay me for garantee your honnest 😀
I'm not a seller, I bought from "audiogon"
Thanks
Anadigit
Attachments
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Very cheap !
No, No, I paid only 600USD for 2 channel.
I bought only Power module, not fully product !
I put them in my chassis and I bought 2 transformers from my local shop.
Thanks
Anadigit
No, No, I paid only 600USD for 2 channel.
I bought only Power module, not fully product !
I put them in my chassis and I bought 2 transformers from my local shop.
Thanks
Anadigit
Attachments
Okay- this is an "improved" (not really) copy of an Eagle 2c which came out in 1989. Me thinks the Eagle is probably quite a lot better but that is only an opinion please.
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