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User Manual for 

 

GROOVE SLEUTH MK.II  

NON-EQUALISING 

PHONO PREAMPLIFIER 

(for needle-drop* recordings with Stereo Lab Software which is supplied 

free with this product) 

 

 

 

 
 

 

 
 

* A 

needle-drop

 is a term which means a version of a music album that has been transferred from a vinyl 

record to a digital audio medium. Needle-drops are also sometimes called 

vinyl rips

 
 

Version 5.1 (February 2018 

 new universal 

Groove Sleuth Mk.II

 

 

 
 
 
 
 
 
 

 

 

 

Summary of Contents for GROOVE SLEUTH MK.II

Page 1: ...tereo Lab Software which is supplied free with this product A needle drop is a term which means a version of a music album that has been transferred from a vinyl record to a digital audio medium Needle drops are also sometimes called vinyl rips Version 5 1 February 2018 new universal Groove Sleuth Mk II ...

Page 2: ...tems of these operating instructions and the safety suggestions Keep them for future reference Follow the warnings indicated on the unit as well as in these operating instructions THE USER SHOULD NOT ATTEMPT TO SERVICE THE UNIT ALL SERVICING SHOULD BE REFERRED TO QUALIFIED SERVICE PERSONNEL OR FACTORY ONLY Phædrus Audio products should NEVER be connected to the external power supply or in any othe...

Page 3: ...do not exist in a perfect world so when warp or rumble as these imperfections are named are present they are better eliminated The technique always employed to remove these effects is high pass filtering and that is the approach taken in Stereo Lab too a slightly under damped fourth order filter may be employed as a rumble filter so that the response falls sharply below the audio passband However ...

Page 4: ...he Groove Sleuth Mk II is also suitable for Phaedrus Audio PHLUX PHLUX II active moving magnet cartridges See Chapter 5 for more information about PHLUX active cartridges Each base unit is equipped with a high quality looping path called iLOOP and the Groove Sleuth Mk II preamplifier has an option for RIAA and limited alternative equalisations In the base options the unit simply presents the cartr...

Page 5: ...for late 78s and early LPs labelled LP and Early which is for all records made up until the late 1940s labelled 78 In this way record monitoring may always be comfortable and accurate This is followed by slightly more make up gain 24dB than the mid band loss in the RIAA network because the signal now has the crest factor of the original music signal Power supply and warm up The Groove Sleuth Mk II...

Page 6: ...the Groove Sleuth Mk II PHLUX II digital correction The PHLUX II cartridge has a very level frequency response Variation is confined to 1dB This is a very good result and is illustrated in the graph above by the red trace Nevertheless 1dB is just perceptible especially when it is a monotonic 2dB drop as shown in the graph The result is a very slightly warm tonal balance So before applying recordin...

Page 7: ...tery supply green LED before making a needle drop this will ensure that the needle drop recording is of the highest quality Reselect external supply when the recording is made to preserve battery charge Chapter 7 Decoding Quadraphonic and Ambisonics discs There were many interesting and important recordings made in Quadraphonic sound and versions of many classic recordings were mixed in Quad Many ...

Page 8: ...roblem with a Phædrus Audio product contact support phaedrus audio com We will diagnose the problem remotely and advise you of the warranty status If a repair or replacement is required we will issue a Return Merchandise Authorization RMA number and tell you where to send the unit to be repaired You MUST have an RMA number before you return the equipment to Phædrus Audio s support service Phædrus ...

Page 9: ... declaration are 89 336 EEC Electromagnetic Compatibility directive 73 23 EEC Low Voltage Equipment directive The products covered by this declaration are Groove Sleuth Mk II non equalising phono preamplifier The basis on which conformity is being declared The manufacturer hereby declares that the products identified above comply with the protection requirements of the EMC directive and with the p...

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