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Audiolab 250W RMS Power Amp for just ₹69,300/-

HiFiVision

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Audiolab 250W RMS Power Amp for just ₹69,300/-



The 8300MB is a pocket powerhouse, housing 250W of pure, balanced amplification. 8300MB’s full power output is delivered into any loudspeaker load – unconditionally. Massive reserves of power are available for high current drive capability to power and control the mightiest of speakers. This latest development of the Audiolab range now features a fully balanced power stage making the most of the balanced XLR inputs.

The 8300MB is quite possibly the perfect example of Audiolab's goal to effortlessly reproduce music with exquisite detail. Not only is 8300MB an extremely powerful amplifier, offering 250W of pure power with high current drive capability, but it also features a fully balanced power stage.

Internally the 8300MB is arranged as two complete power amplifiers which are bridge coupled to the loudspeaker terminals. Each power amplification stage is fed from one of the terminals of the balanced input, therefore the 8300MB operates as a fully balanced amplifier right through to the speaker output.

The benefits are a high level of noise rejection and lower transient distortion plus the ability of the amplifier to draw maximum current from the power supply as required to follow the musical waveform accurately.

It all adds up to a startlingly vivid and highly impactful musical performance that will put more energy into your loudspeakers as well as control them like never before.



You can also consider the Audiolab 6000A to use as a Pre Amplifier for the above power amplifier!

✔ FREE Shipping to most locations in India
✔ Official Manufacturers Warranty valid in India
✔ Brand NEW in Box & 100% Original
✔ Price includes GST
✔ Electronic products run on 230 volts
✔ Secure payment options & EMI

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rahuln

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Sep 15, 2011
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226
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Hyderabad, India
IMHO, This is for just one channel so you will need two for stereo setup :). If its a pair, its a fabulous offer to buy.
 

sachinclemens

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Aug 13, 2013
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kochi
How's the performance of these monoblocks? Any FM using these mono blocks in their rig ? If so please post your review.
 

Fantastic

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Jun 1, 2010
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These are very well regarded in the European market. Among the best I'm sure. Their stand alone ( lower power ) stereo power amps are very good. This one is very beefy and should work well with difficult speaker loads. But as usual , you should see what it can do in your system. Buying expensive audio equipment blind ( or unheard !) isn't a good idea, in my opinion ! Monoblocks are very attractive . Can do a lot of things with it to improve the sound in one's system. Wonder what it is like at low volume.....
 

sachinclemens

New Member
Joined
Aug 13, 2013
Messages
20
Points
3
Location
kochi
These are very well regarded in the European market. Among the best I'm sure. Their stand alone ( lower power ) stereo power amps are very good. This one is very beefy and should work well with difficult speaker loads. But as usual , you should see what it can do in your system. Buying expensive audio equipment blind ( or unheard !) isn't a good idea, in my opinion ! Monoblocks are very attractive . Can do a lot of things with it to improve the sound in one's system. Wonder what it is like at low volume.....
Wise comment. Thank you
 

Fantastic

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Jun 1, 2010
Messages
865
Points
93
Location
Third Rock
I see all kinds of explanations about the desirable damping factor in amps and many factors seem to be misunderstood. The actual damping factor is NEVER as good as they claim, in a real system.
To understand what it really does....For those who have a spare driver of 6 inches and above you can do an experiment. Should also work with a regular complete speaker ( meaning with crossover and cabinet ) but not the ideal way of trying this . Tap the woofer and listen to the sound. Then short the speaker terminals with a piece of wire and the sound would have changed when you tap it. Without the short the woofer would resonate at its ( low) resonant frequency. With a shorted terminal it would be damped so much that that the resonance would hardly be there and on tapping the sound would be sharper as the low frequency would be truncated a lot. This doesn't even involve an amplifier ! Practically it only has to do with what the speaker "sees" in the outside world . The terminal contact resistance, the external wires resistance , the amp's output impedance ( when it is powered up ! ) and the amps terminal contact resistance and the speakers internal dc resistance.
The damping is generated by what is called the back emf ( voltage ) generated in the speaker coil moving in the speakers magnetic circuit. With a shorted terminal the only 'resistance' is the resistance of the voice coil. You cannot 'damp' the speaker more than applying this short. In this condition you have the speaker resistance and the external resistance ( zero ohms if its shorted with a small piece of wire ) .
Damping here is the speakers nominal impedance divided by the external resistance and dc resistance of the voice coil. In a full system the external resistance would comprise of all the components mentioned above.
The other resistances could add up as follows ...Contact resistance at the speaker ( say 0.005 ohms x 2 ), the speaker leads ( say 0.016 ohms x 2 for a wire 10 feet long made with 12 gauge wire ), contact resistance of the connector at the amp ( say 0.005 x 2 ohms ). A total of 0.052 ohms PLUS the speaker dc resistance ! Assuming a dc resistance of 6 ohms for an 8 ohm speaker , we get 6.052 ohms.
For an amp rated at having a damping factor of 1000 with an 8 ohm speaker , the output impedance is 8/1000 = 0.008 ohms !
However in the real world we calculated ( for an 8 ohm speaker ) the total resistance in the circuit to be 6.052 ohms. So the "real" damping factor here is 8 ohms ( nominal speaker impedance ) divided by all resistances in the circuit ( 6.052+0.008 ) = 8/6.06 = 1.32 !
So a published 1000 damping factor for the amp , in a real world system ends up as 1.32 !
However the story doesn't end here ! It's always complex when you start scratching the surface and start looking deeper ! There is mechanical and acoustical damping also . In addition to this, the circulating ( electrical damping ) current generated by the speaker coil itself passes through the amp which has to handle this . How the amp reacts to that also affects the sound we hear.

SO, what really matters ? The output stage capability of the amp ( high current ) and a well designed speaker. Any damping factor of say 20 or more is most likely sufficient since it will swamped by all the other resistances in the system. While a damping factor of 1000 sounds 'exciting ' it really doesn't matter much practically. As far as amplifiers go , some use a series resistance of about 0.1 ohms or thereabout on the output for stability . These amps will have a damping factor of say 80 with an 8 ohm speaker and 40 with a 4 ohm speaker. Others that are stable without this resistance can have much higher damping factors though as shown it doesn't matter so much eventually.
 
Joined
Oct 10, 2018
Messages
53
Points
8
Location
bengaluru
I see all kinds of explanations about the desirable damping factor in amps and many factors seem to be misunderstood. The actual damping factor is NEVER as good as they claim, in a real system.
To understand what it really does....For those who have a spare driver of 6 inches and above you can do an experiment. Should also work with a regular complete speaker ( meaning with crossover and cabinet ) but not the ideal way of trying this . Tap the woofer and listen to the sound. Then short the speaker terminals with a piece of wire and the sound would have changed when you tap it. Without the short the woofer would resonate at its ( low) resonant frequency. With a shorted terminal it would be damped so much that that the resonance would hardly be there and on tapping the sound would be sharper as the low frequency would be truncated a lot. This doesn't even involve an amplifier ! Practically it only has to do with what the speaker "sees" in the outside world . The terminal contact resistance, the external wires resistance , the amp's output impedance ( when it is powered up ! ) and the amps terminal contact resistance and the speakers internal dc resistance.
The damping is generated by what is called the back emf ( voltage ) generated in the speaker coil moving in the speakers magnetic circuit. With a shorted terminal the only 'resistance' is the resistance of the voice coil. You cannot 'damp' the speaker more than applying this short. In this condition you have the speaker resistance and the external resistance ( zero ohms if its shorted with a small piece of wire ) .
Damping here is the speakers nominal impedance divided by the external resistance and dc resistance of the voice coil. In a full system the external resistance would comprise of all the components mentioned above.
The other resistances could add up as follows ...Contact resistance at the speaker ( say 0.005 ohms x 2 ), the speaker leads ( say 0.016 ohms x 2 for a wire 10 feet long made with 12 gauge wire ), contact resistance of the connector at the amp ( say 0.005 x 2 ohms ). A total of 0.052 ohms PLUS the speaker dc resistance ! Assuming a dc resistance of 6 ohms for an 8 ohm speaker , we get 6.052 ohms.
For an amp rated at having a damping factor of 1000 with an 8 ohm speaker , the output impedance is 8/1000 = 0.008 ohms !
However in the real world we calculated ( for an 8 ohm speaker ) the total resistance in the circuit to be 6.052 ohms. So the "real" damping factor here is 8 ohms ( nominal speaker impedance ) divided by all resistances in the circuit ( 6.052+0.008 ) = 8/6.06 = 1.32 !
So a published 1000 damping factor for the amp , in a real world system ends up as 1.32 !
However the story doesn't end here ! It's always complex when you start scratching the surface and start looking deeper ! There is mechanical and acoustical damping also . In addition to this, the circulating ( electrical damping ) current generated by the speaker coil itself passes through the amp which has to handle this . How the amp reacts to that also affects the sound we hear.

SO, what really matters ? The output stage capability of the amp ( high current ) and a well designed speaker. Any damping factor of say 20 or more is most likely sufficient since it will swamped by all the other resistances in the system. While a damping factor of 1000 sounds 'exciting ' it really doesn't matter much practically. As far as amplifiers go , some use a series resistance of about 0.1 ohms or thereabout on the output for stability . These amps will have a damping factor of say 80 with an 8 ohm speaker and 40 with a 4 ohm speaker. Others that are stable without this resistance can have much higher damping factors though as shown it doesn't matter so much eventually.
Well said...
 

Mayank Shah

Active Member
Joined
May 22, 2015
Messages
481
Points
43
Location
Chennai
Strangely, Audiolab doesn't have a model in between. If they had a 80-120 watter monoblock for around 40k, then I would have got them blind, and surely would be more appealing to the masses.
 

Mukul77

New Member
Joined
Nov 21, 2014
Messages
1
Points
3
Location
Tezpur, Assam
Hi everyone. Myself Mukul from Assam. I have been using the earlier version of this amp i.e. a pair of 8200MBs and 8200CDQ as CDP/DAC/Preamp with Dynaudio Audience 72 (4 ohms) floor standers. I cannot explain the SQ in technical terms. Quite neutral and clean sounding amp with massive power to drive the most demanding/power hungry speakers. The only update (IMO) to 8200MB is the dedicated switch (back side penal) to select XLR and line level input which the previous version was selected by dedicated sorting pin in XLR port. These are very underrated amps. Nothing can beat at their price point.

Regards.
Mukul
 
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