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:
Maybe you understand the title now as I didn't know where to put this...
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:
Maybe you understand the title now as I didn't know where to put this...
Could be something like this:
Magnetic amplifier - Wikipedia, the free encyclopedia
This solution seems to be used before the wide application of semiconductors...
Magnetic amplifier - Wikipedia, the free encyclopedia
This solution seems to be used before the wide application of semiconductors...
I found that odd too... As are the following two quotes. Not exactly a consistent way of describing it
It costs $485 (plus 150 shipping and 60 paperwork).
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.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?
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:
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.
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.
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.
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.
Why no? I think it is a possibility. They do not tell that they do NOT use a active device. They do NOT use a opamp, tube or transistor according to the ad. Why use the batteries for example. Please take a look at this link:
Homemade Magnetic Audio Amplifier.
It describes a diy magnetic amplifier where a battery is used for DC bias. If they only use a passive transformer, why build in the battery?
I do admit that the ad is very vague and open to discussion. Perhaps they use a combination. I must say it intrigues me. I would almost buy it for reverse enginering
.Yes, but note that it says:
That oscillator needs to be made with transistors, and the magnetic amplifier won't work without it.
[OT]
I love that website - homemade lasers, CRTs, triodes, transistors etc. That's real DIY!
[/OT]
It does? I must not have read with enough attention then.
Or possibly this quote threw me off: "BLAUDIO LP1 mkII does not use tubes or solid state parts (no transistors or op amps) to reproduce sound."
To some of you I may very well be a noob with very limited knowledge, but I would venture to say said buffer is part of the system for sound reproduction.
But it may indeed not belong to the LP1 mkII but to the headphone amp? Well that's the other gripe I have: very limited and not very consistent information...
Yes, but note that it says:
That oscillator needs to be made with transistors, and the magnetic amplifier won't work without it.
[OT]
I love that website - homemade lasers, CRTs, triodes, transistors etc. That's real DIY!
[/OT]
Point taken! Unfortunatly oscillators are still a bit "black art" to me. I have to dive into that
. I feel now like Al Bundy from Married with Children (one of my favorite tv comedy shows). They have a episode when they try to find out what some electric switch in the house is doing. You can guess the result...lightning and shortning.... Anyway, oscillators are for me still ...- Status
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