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  Parasound Halo A21 Mint     High End " High definition"  Stereo Power  Amplifier
Comes with  "Original Box and all accessories, including rack mount kit                              ( Excellent condition )  

Parasound Halo A21 power amp, in like new condition. An absolutely beautiful sounding amp, in perfect shape, just 12 months old. 250 Watts per side, Class A. Comes with original box and all accessories, including rack mount kit. Trade in from original owner .

This is one of the best amplifiers  on the market and is excellent valve for money . I  use a Parasound A21 power amplifier  in my own reference sound  system for speaker design and sound quality  evaluation ,The
Parasound Halo A21  Killer dynamic range Bass mid and top end  details at low to high levels  are excellent with true reproduction  any kind of music or home theatre system Music or Video Blu ray or Music DVD  .  This is a true  reference amplifier  that will drive ant type of   speaker from electrostatics , planar ,  dynamic cone    " Highly recommended " Russell Storey  Stones Sound Studio


Product Code: ParaA21


Parasound A21   HALO  Power amplifier   Parasound A21   HALO  Power amplifier rear

Specifications

* Circuitry designed by legendary John Curl
* THX Ultra 2 certified
* High bias Class A/AB operation
* Balanced inputs with discrete circuits and XLR connectors
* Direct Coupled - no capacitors or inductors in signal path
* Complementary MOSFET driver stage and JFET input stage
* 16 beta-matched 15 amp, 60 MHz bipolar output transistors
* 1.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel; 100,000 µF power supply filter capacitance
* DC Servo and relay protection circuits
* AC present, channel status, high temperature indicators
* Gold-plated RCA input jacks, loop output jacks
* Heavy-duty 24k gold-plated 5-way speaker binding posts
* Auto turn-on by 12v trigger or audio signal, 12v trigger out
* Rear panel gain controls; ground lift switch
* 4U Chassis; carry handles; rack mounting adapter included
* Parasound's 10 years parts, 5 years labor warranty



* Continuous Power Output: 250 watts RMS x 2, 20 Hz - 20 kHz, 8 ohms, both channels driven; 400 watts RMS x 2, 20 Hz - 20 kHz, 4 ohms, both channels driven; 750 watts RMS x 1, 20 Hz - 20 kHz, 8 ohms
* Current capacity: 60 amperes peak per channel
* Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt
* Total harmonic distortion: < 0.2 % at full power
* IM distortion: < 0.04 %
* Slew rate: >130 V/µsecond
* Dynamic headroom: > 1.5 dB
* Interchannel crosstalk: > 80 dB at 1 kHz; > 63 dB at 20 kHz
* Input sensitivity: 1 V for 28.28 V, THX Reference Level
* Input impedance: 33 kW unbalanced; 66 kW balanced
* S/N ratio: > 112 dB, input shorted, IHF A-weighted
* Damping factor: > 1100 at 20 Hz
* Voltage: 110V - 120V
* Dimensions: 17-1/4" w x 7-5/8" h x 19-1/8" d, 7" h without feet
* Net weight: 60 lbs

 This amplifier is very heavy at 75 lbs  packed   so  shipping cost  is dependent on your  location and post code

Price: USD

$2770.00




DYNAVECTOR   Karat DV17 MkII   Moving Coil Cartridge   (  " Mint  " condition )   stylus  played only  6 LPs )

Product Code:  DV17 MkII

Dynavector DV17 MkII MC cartridge

Price: USD

$899.00




 LUXMAN-pd300-vacuum-disc-turntable           Turntable only    WITH OUT  ARM & CARTRIDGE   
 11 Kg   Belt drive turntable with  electronic speed control  (45/33 rpm)   has  built in Vacuum bellows  that   clamp the record onto  it to the solid alloy platter. Bass mid and top end are excellent with the right tone arm  .
This is a very rare turntable and is  in  (  Good Condition  )

Product Code: PD300

luxman-pd300-vacuum-disc-turntable-Photo3

 

 

 

 

 

 

 

 

 

Price: USD

$997.00




NAKAMICHI  CA5 II  Pre-amplifier   manual volume   ( bass /trebble  On /Off  ) MC /MC   switchable Cartridge EQ the Phono pre amp  has  one exception in detail and dynamics
   " Excellent High pre amp for Hi end   Stereo Audio  reproduction    
       Line Cd Aux tuner inputs , tape in out /rec  2 line outputs                            (  Good Condition  )

Product Code:CA5 II

Nakamichi CA5 II preamplifier

Price: USD

$699.00

 

  NAKAMICHI  CA7-E Legendary   Preamplifier with remote ( with remote control functions and volume  )  MINT
 Nakamichi  Top Shelf    switchable Cartridge EQ the Phono pre amp  has  one exception in detail and dynamics  is one exception in detail and dynamics
   " Excellent High pre amp with remote volume and mute  for Hi end    dynamic and details  Stereo Audio  reproduction   
    Line Cd Aux tuner inputs , tape in out /rec  2 line outputs (  3band Equalizer  on/off)           (  Good Condition  )


Product Code: CA7-E



Price: USD

$1577.00




  NAKAMICHI  500   in  " "Original Nakamichi  Box " " one owner   fully overhauled record play excellent 3 Microphone inputs  mixer level control plus 2 line inputs with 400 Hz Calibration  ref   Odb VU  tone  (    good condition  ). One of the better sounding decks because of the discrete simple circuits . This  Deck comes with guarantee and full  technical back up            

Product Code: Nak500


Nakamichi 500  

Price: USD

$297.00




NAKAMICHI    HI COM II Noise reduction Unit        (  "Excellent " condition ex Stones Sound Studio ) 

 Comes with the  original the "  Owners manual  "  Fully tested and Guarante

Noise Reduction System, it comes in very good  clean condition, 100% fully functional, all tested. With Nakamichi Analyzer  and Tape deck in record and Play modes ,, I also  tested the unit with new recording  and as well  tapes I had recorded in 1978 with high com and its dynamic range and noise reduction are second to none  true  High end sound !!   This unit was designed  for Professional tape machines  by Telefunkin  Germany  for Nakamichi Japan  and  It works very well on any kind of music and play back , has  built in 400Hz calibration tone  master and sub master level controls  rear  panel record and play level controls  plus  yes ,  Its got a Phono    Noise  processor actually   lowers  records noise and  has manual  subsonic filter for warped records .   Bingo its got the lot

  

Product Code:  NAK-Hi COM II                SOLD

Nakamichi Hi Com II  Noise reduction Unit

Price: USD

$287.00




 NAKAMICHI 600  cassette deck    ( In Mint Condition )        One owner

The deck mechanism  has been fully overhauled cleaned lubricated    re aligned and speed calibrated to Nakamichi Standard in our Nakamichi Service lab .
This decks sound on  Playback is fantastic  and Record with standard TDK tapes  is very good but with TDKSA90  the recording is  EXCELLENT !! very dynamic and detailed  some decks sound better than others this is one of those . the deck meets and exceeds specification in frequency response , WF and speed . Mechanism  and heads have little or no wear..   its top shelf   . Deck comes with guarantee and full  technical back up      line inputs   with 400 Hz Calibration  ref   Odb VU  tone        
 
This is a very rare  untouched  electronics & mechanics   (  Good working  Condition  )

 


Product Code: NAK600-1W          SOLD

Nakamichi 600 Cassette deck

 

 

 

 

 

 

 

 

 

Price: USD

$387.00


  Parasound Halo A21 Mint     High End " High definition"  Stereo Power  Amplifier
Comes with  "Original Box and all accessories, including rack mount kit                              ( Excellent condition )  

Parasound Halo A21 power amp, in like new condition. An absolutely beautiful sounding amp, in perfect shape, just 12 months old. 250 Watts per side, Class A. Comes with original box and all accessories, including rack mount kit. Trade in from original owner .

This is one of the best amplifiers  on the market and is excellent valve for money . I   use a Parasound A21 power amplifier  in my own reference sound  system for speaker design and sound quality  evaluation ,The
Parasound Halo A21  Killer dynamic range Bass mid and top end  details at low to high levels  are excellent with true reproduction  any kind of music or home theatre system Music or Video Blu ray or Music DVD  .  This is a true  reference amplifier  that will drive ant type of   speaker from electrostatics , planar ,  dynamic cone    " Highly recommended " Russell Storey  Stones Sound Studio


Product Code: ParaA21-2    SOLD


Parasound A21   HALO  Power amplifier   Parasound A21   HALO  Power amplifier rear

Specifications

* Circuitry designed by legendary John Curl
* THX Ultra 2 certified
* High bias Class A/AB operation
* Balanced inputs with discrete circuits and XLR connectors
* Direct Coupled - no capacitors or inductors in signal path
* Complementary MOSFET driver stage and JFET input stage
* 16 beta-matched 15 amp, 60 MHz bipolar output transistors
* 1.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel; 100,000 µF power supply filter capacitance
* DC Servo and relay protection circuits
* AC present, channel status, high temperature indicators
* Gold-plated RCA input jacks, loop output jacks
* Heavy-duty 24k gold-plated 5-way speaker binding posts
* Auto turn-on by 12v trigger or audio signal, 12v trigger out
* Rear panel gain controls; ground lift switch
* 4U Chassis; carry handles; rack mounting adapter included
* Parasound's 10 years parts, 5 years labor warranty



* Continuous Power Output: 250 watts RMS x 2, 20 Hz - 20 kHz, 8 ohms, both channels driven; 400 watts RMS x 2, 20 Hz - 20 kHz, 4 ohms, both channels driven; 750 watts RMS x 1, 20 Hz - 20 kHz, 8 ohms
* Current capacity: 60 amperes peak per channel
* Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt
* Total harmonic distortion: < 0.2 % at full power
* IM distortion: < 0.04 %
* Slew rate: >130 V/µsecond
* Dynamic headroom: > 1.5 dB
* Interchannel crosstalk: > 80 dB at 1 kHz; > 63 dB at 20 kHz
* Input sensitivity: 1 V for 28.28 V, THX Reference Level
* Input impedance: 33 kW unbalanced; 66 kW balanced
* S/N ratio: > 112 dB, input shorted, IHF A-weighted
* Damping factor: > 1100 at 20 Hz
* Voltage: 110V - 120V
* Dimensions: 17-1/4" w x 7-5/8" h x 19-1/8" d, 7" h without feet
* Net weight: 60 lbs

 This amplifier is very heavy at 75 lbs  packed   so  shipping cost  is dependent on your  location and post code

Price: USD

$2770.00





NAKAMICHI  ZX7 
Cassette deck    (  " Mint  " condition  front panel  with original  cal covers )     one owner

The deck mechanism  has been fully overhauled tested  cleaned lubricated  re aligned and speed calibrated to Nakamichi Standard in our Nakamichi Service lab .  
This decks sound on  Playback is better than fantastic its a reference machine for sound quality and as good as a ZX9 in every aspect  of sound quality  on Play back and Record with standard TDK tapes  is very good but with TDKSA90  the recording is  EXCELLENT !!  ,, Metal  tapes in record  is out of this planet very dynamic and detailed  some decks sound better than others this is one of those . the deck meets and exceeds specification in frequency response , WF and speed . Mechanism  and heads have little or no wear..   its top shelf   Deck has  Manual  Azimuth calibration system with  400 Hz  and 15KHZ  reference tones with Azimuth coloured leds for  setting azimuth . has Automatic  3sec  fade in / out  of recording record  level  controls  . Deck comes with guarantee and full  technical back up      line inputs   with 400 Hz Calibration  ref   Odb VU  tone

 Deck comes with guarantee and full  technical back up    Stones Hi End demo ref  tape   Frequency response Graph            

Product Code:  NAK-ZX7

Nakamichi ZX7 cassette deck Nakamichi ZX7 with Nakamichi  HiComII

Price: USD

$899.00



         
  SONY  PS4570     Direct drive Turntable " with 9" arm  High definition cartridge" 
 
( Excellent condition )  

 
Comes with   9" long arm  ,mounted an  Excel ES70Ex ( Goldring Hi End division Japan )  MM cartridge with special  cut and shaped Shibata stylus    4Sq  Stereo  Cartridge /Stylus has  45khz bandwidth, This Cartridge is excellent and kills a lot of moving coils in dynamic range bas mid and top end and detail  . Stylus is   tested  as  New  few playings 
Cartridge and arm Tracks at 0.8 to 1gm ,  Arm is HQ  can take a wide range of cartridge with Oil damper antic scate 

manual hydralic damped lift lower,  45-33 rpm  Speed controlled direct drive motor , Platter  Rubber record damping pads  , Cover and deck in Very good condition .  # Record damper in photo3 not supplied with TT

 
 This Sony PS 4570  turntable I have personal owned and used  for recording and play back
 "   recommended by  " Russell Storey  Stones Sound Studio
 as a V good  main or second back up quality turntable

Product Code: Sony PS-4570   SOLD


Sony PS4570 Direct Drive turntable with 9" arm & cartridge  




Price: USD

$357.00




Dynavector    Karat DV17 Mk-II        High  End   Moving Coil Cartridge     20 -  100Khz   bandwidth 

 
(  " Mint  " condition ) Comes in original box with  Dynavector factor QC graph . The  stylus  has been tested and  is   as new 9/ 10
This cartridge was used only a few times as a reference in sound quality by Stones Sound Studio

Product Code:  DV17 Mk-II

Dynavector DV17 MkII MC cartridge


Fig.A is input square wave form comprising frequency components
up to 200th higher harmonic component.
Fig.B shows the wave deformation by the dispersion
in 7 mm aluminum cantilever.
Fig.C shows the effect of dispersion of 1.7 mm solid diamond cantilever.

 

 


Figure D is from DV's lab and shows the totally flat response of the cartridge.
Notice between 150Hz to 10KHz the extremely flat frequency response.
The sharp cut off near 20KHz is obviously due to the measuring system.

Price: USD

$899.00



 



Dynavector  DV-505 tone-arm  (  " Excellent " condition )   

TOP SHELF   Arm   In  the  original box  with  Arm  template counter weights  and information

Product Code:  DV17 505


Price: USD

$1775.00


http://4.bp.blogspot.com/-ZZPty7sZiMI/TlVf9E1k4KI/AAAAAAAACOE/o_e4CplCclo/s400/blogDV505%2BC.jpgThis unconventional tone arm is our answer to to-day's advanced record cutting technplogy. The DV/505 with its biaxial arm, dynamic and electro-magnetic damping systems and spring loaded tracking force, gives 100% cartridge performance. The DV/505 arm will extrat from the Dynavector cartridge the very maximum in quality and enable you to experience tremendous satisfaction from your records. The 1977 CES Design and Engineering Exibition selected and awarded the DV/505 tone arm. Why not treat yourself to this luxury -
the experience will be well worth it.

In a radical departure from conventionally accepted ways of tone arm design, Onlife Research introduces its Dynavector DV-505 arm that looks and in many ways behaves like no other tone arm ever before. By its full technical designation it is called a "magnetically damped, inertia controlled, bi-axis massdivided, dual pivot, dynamically balanced tone arm," a lengthy description whose numerous unfamiliar terms already hint at the uniqueness of this innovative design. Details about features and functions are explained on the back page; the validity of the various design innovations will be demonstrated best, however, in a careful comparative listening test i n conjunction with a high fidelity reproduction system of the highest order of professional quality.

 

The Dynavector DV-505 Raises Tracing Fidelity to A New Level of Accuracy.

A tone arm has to support and guide the phono cartridge in its path along the record groove, permitting it to faithfully follow all groove excursions at a light tracking force, without however vibrating, resonating or in any other way moving itself. Contrary to conventional thinking, this "steadiness" in a tonearm is best achieved by giving the arm a relatively high mechanical mass. Records, however, being mass produced, almost invariably show some small degree of warp which forces the arm up and down when playing. A n arm of large mass would, because of its high inertia, cause rather violent changes in tracking force. Ideally a tone arm should fulfill two conflicting demands: large mass for steadiness in the horizontal plane, low mass for the vertical plane. A tone arm should actually be two tone arms. Impossible?

The Dual-Pivot Dynamic Balance Dynavector Arm.

The Dynavector DV-505 is two arms in one. Its main arm section of large mass, pivoted to move only in the horizontal plane, provides a superb degree of steadiness; its sub section, separately pivoted to move only vertically, is of low mass, and tracking force is applied by a precision calibrated spring mechanism. It thus provides perfect tracking of lateral a n d vertical groove modulations without being affected by record warp.

http://3.bp.blogspot.com/-Ti2J7tZYEl4/TlVf8kb9DqI/AAAAAAAACN0/y5iqviQArqY/s400/blogDV505%2BC1.jpg

Dynamic Damping System. Eliminates Arm Resonance

Every tone arm, being a physical mass, tends to resonate at or around a certain frequency, and this arm resonance can seriously affect the cartridge's tracking fidelity — the sound becomes "muddied" and loses all transparency and clarity. Resonances in conventional tone arms have not really been eliminated but only moved down into the subsonic region at around 10 to 20 Hz where they show up as a strong peak — up to 10 dB — in the system frequency response curve.

To solve this problem in the Dynavector DV-505, a subsidiary vibrating mass consisting of a spring bob weight is provided inside the U-shaped main arm, with its mass calculated precisely in such a way that it will resonate at the same frequency — but in exactly opposite phase — as the arm itself. This opposite resonance has the effect of cancelling out any arm resonance.

 

Constant, Unvarying Tracking Force

Vertical tracking force is applied by a precision made spiral spring device. This "dynamic balance" system maintains unvarying tracking force regardless of record warp.

Tracking force adjustment is done by means of a dial mounted on the sub arm pivot.

 

http://2.bp.blogspot.com/-I35wE3dWnxU/TlVf8k3o4iI/AAAAAAAACNs/XKx2o0v8zP0/s400/blogDV505%2BC3.jpg

Electro-Magnetic Damping System for Perfect Tracking.

An additional measure of damping is effected by the electromagnetic damping system. A curved rod attached to the rear of the arm is embedded in a magnetic field supplied by two permanent magnets. Any minute movement of the rod, due to an undamped arm resonance, causes an eddy current to be induced in the rod, which in turn interacts with the magnetic field to return the system to its rest state. As response graphs show, the arm thus becomes virtually free from any resonance phenomenon and permits perfect tracking of even subsonic frequencies. This highly effective damping also makes the arm impervious to acoustic feedback and vibrations transmitted through the floor and turntable cabinet, to guarantee utmost clarity of sound under all operating conditions.

 

Free-standing Type

Thanks to its heavy base, the Dynavector arm can be placed freely on any turntable without requiring screw mounting. (Mounting holes are, however, provided.) A template is supplied for correct overhang adjustment.

Specifications

Overall lenght: 335 mm incl. head shell

Effective lenght: 241 mm

Offset angle: 21,5 degrees

Lateral tracking error: 0° at inner grooves, 2,2° at outer grooves

Overhang: 15 mm

Adjustable height range: 38 - 70 mm

Lateral and vertical sensitivity: less than 50 mg

Head shell connection: standard EIA type 4-pole connection

 

  

     Returns :

Returns on New Items :Customer must contact Stones Sound Studio within 7days of purchase to  receive an GR approval  number and authorization

Returns on Used Items , Customer must contact Stones Sound Studio within 7days of purchase to to  receive an GR approval  number and authorization  

            Condition :

Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is operational and functions as intended. This item may be a floor model or store return that has been used.
See  Stones Sound Studio  listing   for  details and description  .