Pre-amp/DAC for JOB 225

playntheblues said:
Do we know for sure if it has just one set of outputs? I sure would like to see two sets of outputs, but I guess that would be an easy fix.
Click to expand...

Yes.

This is a disappointment to me, too. I prefer connecting subs at line-level, not speaker-level.

But, then again, the PRE2 is $1700, not $7000, or whatever the most inexpensive Goldmund preamp costs.
 
I am afraid you would lose 3db or about half of your power by splitting the signal that way opposed to doing it internally. Can someone a little sharper than me confirm or dispute this?
 
Got email from JOB of specs for the Pre2,



Dear Brian,

please find some technical datas hereafter:




TECHNICAL DATA


POWER SUPPLY

  • Nominal line voltage: 117 V
  • 1x Power transformer
  • Input voltage range: +/- 10 %
  • Fuse1 A
  • Separated ground and earth signal
  • Connection between earth and ground to cancel all ground loops

Rated Power Consumption:

IEC 60065: 6,5 W

Max Power Consumption:

·IEC 60065: 10 W



FRONT PANEL

Input Switch


  • Volume Control
  • Orange led for power
REAR PANEL

  • Power cord socket 3 lugs
  • Voltage Selector 110/220 V
  • 3 pairs of RCA inputs (right and left)
  • 1 pair of RCA output (right and left)

INPUT

  • Input impedance: 50 kOhms
  • Nominal input level: 2.25 V RMS
  • Maximum input level: 3.6 V RMS

OUTPUT

  • Maximum output level: 3.6 V RMS
  • Output impedance: 75 Ohms

PERFORMANCE

Frequency response:

These values for any level to maximum output level

+/- 0.1 dB, 10 - 20 kHz

·

+/- 3 dB, 10 - 200 kHz



Group delay:


  • Propagation delay < 1 ms stable with frequency from DC to 100 kHz
Distortion:

With 1 V RMS output level, 80 KHz measurement bandwidth, 600 Ohms termination impedance


  • THD unbalanced in to unbalanced out < 0.005% (-90 dB) flat with frequency
  • IMD unbalanced in to unbalanced out < 0.002% (-80 dB)
Circuit speed:


  • Slew rate of the amplification stages: > 20 V/us
  • Rise time: < 700 ns

Crosstalk:


  • Separation: > 80 dB between channels. (20 Hz – 20 kHz)
Noise:

·Signal-to noise ratio on line input: > 80 dB (0.01 Hz - 10 Mhz)

·Weighted ASA A: > 100 dB


SAFETY FEATURES

Automatic switching to MUTING if the AC line drops or is interrupted

SIZE AND WEIGHT

Size

360mm (14,2") W x 245 mm (9,7") D x 64 mm (2.5") H

Weight

Total Weight: 4 Kg (8.8 lb)

WARRANTY

1 year parts and labor

Thanks.

Best Regards.

JOB Electronics.




and finally a picture taken during a warming up session.

Thanks.

Best Regards.

JOB Electronics.



photo Pre2 JOB.JPG

 
Unable to post the link but the details are on Wizard's blog (with pictures) - basic remote with volume control and mute. Extract below:

Goldmund's budget division which packages their core circuits in basic
threads and scaled-down features have released the matching preamp to their
popular Job 225 stereo amp.

With 3 RCA inputs, 1 RCA output and basic volume control, the Job Pre2
built in Goldmund's Geneva factory is available now for $1699 delivered to
nearly anywhere in the world, all customs and shipping fees included (Spain
and Portugal excepted due to shipper restrictions and Australians must add a
small import tax upon delivery).
 
Thank Joe, I listened to the JOB 225 with goldmund metis preamp, it was a beautiful match , but as the JOB 225 he was very sensitive to the quality of the power cord.I think taking a TWL10+, the sweetcord socket is curiously not compatible with European plugs...
 
Yup the Sweetcord is ONLY US compatible. You HAVE to buy an adapter to use it.
 
I thought rather to change if it is possible the plug, I don't know if it's glued or screwed ?
 
No, better an adapter. I dont know where the small AC-Curator is located!!!!!

They told me to use an adapter.
 
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