Continual effective output 2W+2W/8Ω, 1W+1W/16Ω, 500mW+500mW/32Ω and 27mW+27mW/600Ω

Input sensitivity/input impedance

unbalanced: 1.0V/26KΩ and balanced: 1.0V/67KΩ

Total harmonic distortion 0.0025% (1KHz), 0.02% (20Hz~20KHz)

Frequency range 20Hz~20KHz (+0, - 0.1dB), 5Hz~170KHz (+0, - 3.0dB)

Signal-noise ratio 115dB (IHF-A)

Input/output

Input: 1 balanced pair, 1 unbalanced pair

Output: 2 headphone jacks and 1 through φ6.3 RCA jack

Power/dimension/weight: 19W/40 (W)

I like my P1 better from a looks perspective. I also don't understand the headphone output from RCA jacks on the back.

Hrm does the rear output say headphone output? Based on the specs and squinting I'd guess it says through output.. like a loop out perhaps?

It's a loop out. Pity they didn't go the extra mile and make it a pre.

I read it quickly and then the blurry, Grado-like photo almost seems to say "headphone output" on the back. Loop makes the most sense.

You can only plugin two phones? Deal breaker.

This means that, because the Japanese are big on the latest gear, P-1's will be available cheap.

This means that, because the Japanese are big on the latest gear, P-1's will be available cheap.

I'll take two, please.

Yep...the older P1 sure looks nicer. If I could land a used Jap version P1 for around 1.2k I might do it.

That's a bit disappointing. It doesn't seem like a big upgrade over the P-1 if it can be called an upgrade at all.

I guess Luxman America's going to sell it for $3000, more because of where the yen is in relation to the dollar today than because of improvements made to the design.

For reference, these are the P-1 mkI specs

Continuous Rated Output

4W+4W/8Ω and 2W+2W/16Ω,

1W+1W/32Ω and 500mW+500mW/64Ω,

53mW+53mW/600Ω

Input Sensitivity / Impedance

1.0V/23KΩ balance 1.0V/66K

Total Harmonic Distortion

0.008% or less (1kHz), 0.025% or less (20~20kHz)

Frequency Response

20~20Hz (+0, - 0.1dB), 10~100kHz (+0, - 0.5dB)

Signal-To-Noise Ratio (IHF-A)

Above 108dB

Inputs

One pair of RCA sockets,

One pair of Balanced sockets on XLR.

Outputs

3 outlets - quarter inch standard headphone jacks

Attachments

Volume, Balance controls, Balance Control Bypass Switch, Input selector switch,

Power switch, power source on (protection) indicator,

Balanced & UnBalanced Inputs, Line Phase Sensor, AC inlet

Electric Power Consumption

31W

Dimensions W x H x D

16.4"(467)

You can only plugin two phones? Deal breaker.

Ditto....I really liked the three headphone jacks on the original P-1.

I just saw Jude's post on head-fi stating that it has the same power output of the P-200...

I would have liked to see the power output of he P1u match that of the P1. Balanced outputs and a remote would have been nice.

I posted this on HF, but if one turns up at the local Stax dealer (small hi-fi shop) then I'll see if they wont let me take internal shots, though some will surely turn up on a Japanese blog somewhere sooner or later.

On a Higher Note :: P-1u Headphone Amplifier

A lot more details and pictures have been posted by On a Higher Note.

This one seems to have only one primary on the transformer i.e. the input voltage can't be changed like on the old one. \

I got a email from on a higher note yesterday with the following information

"Luxman are replacing the P-1 reference headphone amplifier with the P-1u; another class A design, the P-1u features ODNF 3.0 and is more than four times quieter than its predecessor. We are expecting our first shipment of the P-1u in September @ $3,000; these are expected to sell out quickly as initial supplies will be limited."

I got a email from on a higher note yesterday with the following information

"Luxman are replacing the P-1 reference headphone amplifier with the P-1u; another class A design, the P-1u features ODNF 3.0 and is more than four times quieter than its predecessor. We are expecting our first shipment of the P-1u in September @ $3,000; these are expected to sell out quickly as initial supplies will be limited."

Getting pretty expensive there. Wonder will the pricing on the original P1 will drop to 2k.

As I predicted: Luxman P-1. It has 3 days to go, so it will be interesting to see what price it fetches.

4x quieter? I don't hear any noise in mine at all. What is 4x zero...

Hmmm, maybe I should try it in the middle of the night, when it is dead quiet, to see if i hear anything. Not that I'd sell it anyway. I like my P-1.

P1u... I guess the "u" means ultimate in this case, going by the claims of performance.

I laughed when I read that it's 4X quieter. Nice marketing. I can't say as I've heard anything on the P1 either.

Aesthetically speaking, the original P1 is 4x better...

Seriously though, the P1 does "look" better. Even the color scheme. However, I'd have upgraded to a P1u IF IT HAD BALANCED OUTPUTS.

How did that one slip by them again?

ehh, don't most people use hp amps as the end-of-the-chain components though?

Well, yes, but if everything is balanced from start to finish in the chain, might as well have balanced headphones too. But I'm just being picky now.

I thought you meant the outputs on the back.

The front didnt even occur to me