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Calling all owners - Jasmine LP 2.0 MKII

I've got about 4 full day's use on mine but do not like what I hear.

Question: How dramatically does this phono preamp change throughout break-in?

I hear distortion (spittiness and splashy bass as if it is running out of power) and a flat soundstage.

I am using the stock power cord and umbilical.

I compared it to my other three phono preamps - Hagerman Bugle, V-LPS, Biotronics Control Systems Gestalt (outstanding and extremely rare). They all are much clearer and cleaner.

It must be mentioned that I requested the Ebay seller to provide a reduction in global gain since I have loads of it with my Project Sunrise II headphone amp. They added a switch on the rear that cuts gain by about 5 dB.
roth_s
sbrownnw
652 posts
 
How does on break in a new phono stage as quickly as possible besides leaving it on? I assume trying to play as much vinyl through it in the waking hours. Is there a quicker way?
jaspert
157 posts
 
I use a hagerman Inverse RIAA Filter( $50) and plug a Squeezebox Touch output in and play Internet radio none stop to accelerate the burn in.

I modded mine with Jantzen Superior z caps and a few other caps, power supply cap changed too & Shinkoh tantalum resistor. I only use the MM stage with external SUT ( AT-700 or Uesugi Ubros 5 L) and it is very good this way.
redglobe
218 posts
 
Jaspert, can you provide specifics on the modification to the power supply? If the result was an improvement, I would like to do the same.
sbrownnw
652 posts
 
@Jaspert, does one have to have a reverse RIAA filter to break in the jasmine or can one run a tuner right into the Jasmine MM inputs?
roth_s OP
11 posts
 
Can someone measure the actual voltage out from the power supply unit? I am still running into troubles and I believe the 21.8V I measure may be a contributing factor. I've had to replace the entire phono main board due to a failed MC section left channel. Long story. So I have yet to replace caps, etc.

I have been having troubles from day one, as seen from my earlier posts. The issues I thought were caused by other things may have been the Jasmine all along.
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