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Old 21st May 2012, 08:49 PM   #1
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Default Mod: move if needed: amp without SS or tubes?

Hi,

Been looking at this amp as someone (other forum) bought the thing and is awaiting delivery.
It just screams "SCAM" to me, but I am not omniscient. So that's where you all come in. Any views on what this might be from the, imho, very scarce info they provide?

Link.

Quote:
Quote:

BLAUDIO LP1 mkII does not use tubes or solid state parts (no transistors or op amps) to reproduce sound. Instead, two nanotechnology produced high end transformers powered by a battery power supply, are used to amplify the sound. The preampís transformers act like a moving coil cartridge on a grands scale to reproduce sound.
Maybe you understand the title now as I didn't know where to put this...
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Old 21st May 2012, 09:20 PM   #2
Enzo is offline Enzo  United States
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Contains no tubes or solid state. Yet farther down it claims it is Class A operation.


I didn't even bother to look at the price.
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Old 21st May 2012, 09:34 PM   #3
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Could be something like this:

Magnetic amplifier - Wikipedia, the free encyclopedia

This solution seems to be used before the wide application of semiconductors...
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Old 21st May 2012, 10:22 PM   #4
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Quote:
Originally Posted by Enzo View Post
Contains no tubes or solid state. Yet farther down it claims it is Class A operation.
I found that odd too... As are the following two quotes. Not exactly a consistent way of describing it
Quote:
Because of its unique amplification characteristics, LP1 mkII is the closest device to a straight wire with gain
Quote:
Vinyl analogue sound, very musical sonic characters
Quote:
Originally Posted by Enzo View Post
I didn't even bother to look at the price.
It costs $485 (plus 150 shipping and 60 paperwork).

Quote:
Originally Posted by tubesforlive View Post
Could be something like this:

Magnetic amplifier - Wikipedia, the free encyclopedia

This solution seems to be used before the wide application of semiconductors...
Interesting... never heard of that before! Definitely a flaw in my course material
Assuming nano-technology produced transformers work the same way as normal ones I think you have at least solved the 'how it works' part.
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Old 22nd May 2012, 07:27 AM   #5
RJM1 is offline RJM1  United States
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TECHNICAL:
Input Impedance: 100Kohms
Gain: 12db
Bandwidth: 3Hz - 150kHz (-3db)
Total Harmonic Distortion (1kHz): <=0.05%
S/N Ratio: > 105db
Input interface: Gold plated RCA x 1 pair
Output interface: Gold plated RCA x 1 pair, 6.5mm headphone jack x 1
Power: +/-9.6V 600mA
Battery operation time: 25 hours for each battery



No output impedance? 0.05% at 1Khz? 12db of gain.Preamplifier/Headphone amp.
No specs. for what kind of headphones that it will drive?

Last edited by RJM1; 22nd May 2012 at 07:29 AM.
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Old 22nd May 2012, 07:32 AM   #6
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Quote:
Originally Posted by ric-paul View Post
Maybe you understand the title now as I didn't know where to put this...
Well, it doesn't have valves, so it must be solid state, so I'm quite happy with it here.
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Old 22nd May 2012, 08:34 AM   #7
godfrey is online now godfrey  South Africa
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Quote:
Originally Posted by tubesforlive View Post
No, that would still require an active device for the HF oscillator.

My guess is it's just a passive volume control pot and a transformer. Note that the headphone amplification is an "add on circuit", thus exempt from the "no tubes or solid state parts" claim.
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Old 22nd May 2012, 09:21 AM   #8
DF96 is offline DF96  England
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Quote:
Vinyl analogue sound, very musical sonic characters
Roughly translated, that means a fair amount of low-order distortion?

Nanotechnology is just a modern buzzword, applied to all sorts of things. It may or may not be relevant.

It could be a step-up transformer and a volume pot, with a resistor hidden somewhere to run the battery down. Or it could be a major advance in audio technology. Take note of the origin. This is the country which produces lots of 'tube amplifiers' in which the tube is either purely cosmetic or actually damages the sound. Sadly, the scams of their countrymen mean that when a Chinese firm really comes up with a bright idea the rest of the world won't believe them.
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Old 22nd May 2012, 10:55 AM   #9
SY is offline SY  United States
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Quote:
Originally Posted by DF96 View Post

It could be a step-up transformer and a volume pot, with a resistor hidden somewhere to run the battery down.
From the photo of the innards, that's exactly what it appears to be. They didn't even bother to use a transformer volume control.
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Old 22nd May 2012, 11:06 AM   #10
DF96 is offline DF96  England
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-105dB S/N sounds impressive until you notice that no reference level is given. Then you calculate that a 100K pot at mid point, so 25k source impedance, gives -111dB wrt 1V or -105dB wrt 500mV.
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