Weston Acoustics
Hand crafted valve amplifiers.
Preamplifiers.
6SN7 Preamplifier.
6SN7 Based active pre-amplifier.Uses valve rectifier, two 6SN7 driving output transformers (No capacitors in the signal path). Output impedance ~100 ohm.
4 Inputs, volume.
$1995.00 (including remote remote volume)
(Pictured on American Oak plinth +$150.00)
Max Voltage Output ......5 volts rms. 14 volts peak.
Frequency response.......20hz to 30khz +/- 0.25db
Separation.......……….... >55db
Signal to Noise............. >88db A Weighted
Signal to Hum…….…..... >68db
Distortion.................…..<0.05% at 0.5 volt rms output
Hum Level……………...... <0.1 millivolt (1.2 millivolt at full volume)
Gain.............................6db
Inputs………..…………..... 4
Time Machine Preamplifier.
Time Machine 2A3 / 45 Preamplifier / Headphone amplifier / Amplifier.Price from $3495.00 including headphone out and speaker output, and also including remote volume control.
Supplied with Linlai 2A3C output tubes, JJ or Tungsol 6SL7 small signal tubes, and Russian NOS 5U4g rectifier tube.
Pictures show vintage RCA45 tubes, black stained birdseye maple (+$150.00), and Graphite Chrome covers (+$450.00)
Specifications as Preamplifier / Headphone amplifier
Gain ............................12db (5db when using 6SN7)
Frequency response.......15hz to >50khz
Separation.......……….....>55db
Signal to Noise..............>92db A Weighted
Signal to Hum…….…......>80db below signal at all output levels
Distortion.................…..<0.05% at 0.5 volt rms output
Hum Level…………….......<0.1 millivolt
Output impedance.........<100 ohm
Inputs………..…………......4
Specifications as Amplifier
Power Output...............2 watts per channel (3.5 for 2A3)
Frequency response......-3db - 15hz to >30khz
Separation...................>55db
Signal to Noise.............>94db
Signal to Hum..............>78db
Distortion....................< 0.2% at 0.5 watt
Hum Level...................< 1.0millivolt
Sensitivity....................700mV
Inputs.........................4
Speaker output.............8 ohm (6 to 12ohm)
Damping factor............>4.0 20hz to 20khz 8 ohms
Weight ~20kg (~44lb)
Integrated Amplifiers.
Troubadour 6L6.
A classically designed hand made 6L6 amplifier with 20 class A watts per channel. Totally designed and hand made in Australia. Using custom wound output transformers wound by us in house. (Pictured on figured Tasmanian Oak plinth +$100.00)Price from $1795.00
SPECIFICATIONS
Power Output - 20 watts per channel
Frequency response -3db - 10hz to >40khz
Separation - >65db
Signal to Noise - >85db A Weighted
Signal to Hum - > 75db
Distortion - <0.4% at 1 watt rms
Hum Level - <2.0 millivolt
Sensitivity - 500mV
Input impedance - 100K
Inputs 4
Speaker output 8 ohm (6 to 10 ohm is fine)
Weight ~16kg (~35lb)
Dimensions 430mm x 320mm x 200mm (width x depth x height)
Can also run KT66, 7581 and 5881 output tubes.
Troubadour 350.
The Troubadour 350 is an upgraded version of the Troubadour 6L6.Upgrades include larger power supply, upgraded cathode capacitors, output transformers, (Gold Lion KT66 output tubes currently unavailable). Supplied with Shuguang KT66 or 350B if available at the time if order.
Can also run 350B, 350C, 6L6GC, 7027, 7581 and 5881 output tubes.
All built on an American Walnut chassis plinth.
Price from $2295.00
SPECIFICATIONS
Power Output - 20 watts per channel
Frequency response -3db - 10hz to >40khz
Separation - >65db
Signal to Noise - >85db A Weighted
Signal to Hum - > 75db
Distortion - <0.4% at 1 watt rms
Hum Level - <2.0 millivolt
Sensitivity - 500mV
Input impedance - 100K
Inputs 4
Speaker output 8 ohm (6 to 12 ohm is fine)
Weight ~16kg (~35lb)
Dimensions 430mm x 320mm x 200mm (width x depth x height)
Topaz 6CA7.
Now using my newly developed modified Pi wound output transformers for fully balanced DC resistance, AC impedance, and low distortion.The new output transformers measure 20hz to 20khz +/-0.2db.
What this means to you is the output transformers are not a limiting factor so no design compromises are needed to compensate.
Transformers used in some sub $3K amplifiers can measure as poorly as 20hz to 20khz +/- 5db. In these cases, massive circuit design compromises need to be made just to achieve barely acceptable sonic and measured results.
The Topaz 6CA7 is a stereo (two-channel) amplifier rated at over 30 watts per channel into 8 ohms.
The input stage of the Topaz can have a big impact on the sound quality of the amplifier, and good quality driver vacuum tubes should be used. The Topaz comes supplied with a set of three new JJ or Tung-sol 6SL7GT small signal valves. The output stage of the Topaz 6CA7 is a standard self biasing setup that, whilst not giving maximum output, gives maximum reliability. It also avoids the use of silicon diodes in the bias network.
The sound from this amplifier is extremely musical, being a true ultralinear connected Class A amplifier, it will give a sound that isn’t fatiguing and is very accurate especially through the critical vocal ranges. It will drive difficult speakers quite well and has very good bass control. Running in class A is the best possible sound for this type of design. The 6CA7’s (=EL34) in this amplifier give a beautiful full musical sound with plenty of controlled bass punch and crystal clear highs.
The Topaz uses very little negative feedback (less than 4db), this is testament to its stable design and use of quality parts.
Price from $2495.00
SPECIFICATIONS
Power Output - 33 watts per channel
Frequency response -3db - 8hz to >70khz
Signal to Noise - >90db A Weighted
Signal to Hum - > 80db
Distortion - <0.05% at 1 watt rms
Hum Level - <2.0 millivolt
Sensitivity - 700mV
Input impedance - 100K
Inputs 4
Speaker output 8 ohm (6 to 10 ohm is fine)
Damping Factor >6 (20hz to 20khz 8 ohm)
Weight ~20kg (~44lb)
Dimensions 440mm x 370mm x 220mm (width x depth x height)
Can also run KT77 and EL34 type output tubes.
Topaz KT120.
Now using my newly developed modified Pi wound output transformers for fully balanced DC resistance, AC impedance, and low distortion.The new output transformers now measure 20hz to 20khz +/-0.1db.
What this means to you is the output transformers are not a limiting factor so no design compromises are needed to compensate.
Transformers used in some sub $3K amplifier can measure as poorly as 20hz to 20khz +/- 5db. In these cases, massive circuit design compromises need to be made just to achieve barely acceptable sonic and measured results.
Based on the Topaz EL34 circuit, the KT120 version runs larger power supply featuring a 900va power transformer and dual rectifiers.
(Pictured on Jarrah Plinth +$50.00).
Price from $3495.00
SPECIFICATIONS
Power Output - 45 watts per channel pure class A
Frequency response -3db - 6hz to >50khz
Signal to Noise - >90db A Weighted
Signal to Hum - >80db
Distortion - <0.05% at 1 watt rms (Typically 0.02%)
Hum Level - <3.0 millivolt
Sensitivity - 500mV
Input impedance - 100K
Inputs 4
Speaker output 8 ohm (6 to 12 ohm is fine)
Damping Factor >6 (20hz to 20khz 8 ohm)
Weight ~22kg (~49lb)
Dimensions 440mm x 370mm x 220mm (width x depth x height)
Can also run KT88, KT90, KT100, 6550, EL34, 6CA7, KT77 type output tubes.
Tempest KT120.
Using my newly developed modified Pi wound output transformers for fully balanced DC resistance, AC impedance, and low distortion.The new output transformers now measure 20hz to 20khz +/-0.1db.
What this means to you is the output transformers are not a limiting factor so no design compromises are needed to compensate.
The Tempest uses valve rectifiers in it's power supply to offer the user a true all valve experience. The power supply of the Tempest uses a massively over sized power transformer rated at 600VA, dual rectifiers, hand wound filter choke, and German made F&T filter capacitors. What this means is the amplifiers operates whisper quiet and there is never a shortage of power available for those times when no-one is about ;).
The output transformers on the Tempest are wound with 20 interleaved layers on a large core size for extended bass response. A special winding technique is used to improve detail, micro detail and improve damping.
The Tempest can be biased to run KT66, KT77, KT88, KT90, 6L6gc, 6550, EL34, 6CA7 and the new Tung-sol KT120 output valves.
The bias on the Tempest is easily set by the owner. Above chassis adjustment point and build in meter make it a 1 minute task. Once set, it only needs to be checked every 4 to 8 weeks to keep the Tempest running at its best. (shown on Jarrah plinth +$50.00)
Price from $3995.00 (Supplied with Tung-sol KT120 output tubes)
SPECIFICATIONS
Power Output - 60 watts per channel
Frequency response -3db - 6hz to >100khz
Signal to Noise - >88db A Weighted
Signal to Hum - > 80db
Distortion - <0.1% at 1 watt rms (Typically 0.03%)
Hum Level - <2.0 millivolt
Sensitivity - 300mV
Input impedance - 100K
Inputs 4
Speaker output 8 ohm (6 to 10 ohm is fine)
Damping Factor >10 (20hz to 20khz 8 ohm)
Weight ~24kg (~53lb)
Dimensions 440mm x 370mm x 220mm (width x depth x height)
Time Machine 300B.
The Time Machine is a stereo (two-channel) amplifier rated at 9 watts per channel into 8 ohms. It is comprised of two main stages: the input stage and the output stage. The input stage can have a big impact on the sound quality of an amplifier, and good quality driver vacuum tubes should be used. This is why some of the best current production 6SN7’s are included. The output stage of the Time Machine is a standard self-biasing setup that, whilst not giving maximum output, gives maximum reliability. It also avoids the use of silicon diodes in the bias network. This is then coupled to custom wound output transformers (the heart and soul of every valve amplifier). Every output transformer is painstakingly wound by myself to exacting specifications. The TM300B output transformers are wound with 18 layers of parallel 0.25mm secondary windings interleaved within the primary windings to offer a level of detail and micro detail only found in very few amplifiers.The Time Machine represents a state of the art “Low-Tech” high-end vacuum tube amplifier that is affordable, and can be used to glorify the beauty and passion of recorded music in one's home.
Price from $3995.00
SPECIFICATIONS
Power Output - 9 watts per channel
Frequency response -3db - 8hz to 55khz
Separation - > 55db
Signal to Noise - > 90db
Signal to Hum - > 70db
Distortion - < 0.2% at 1.0 watt
Hum Level - < 2.0millivolt
Sensitivity - 700mV
Inputs - 4
Speaker output - 8 ohm (6 to 10ohm)
Damping factor >4.0 20hz to 20khz 8 ohms
Weight ~20kg (~44lb)
Artisan 150
The Artisan 150 dual mono amplifier is rated at 45 watts class A per channel into 8 ohms each.The Artisan uses minimal added global feedback (less than 4db), this is added via a tertiary winding in the output transformer. I have found that using a small amount of feedback in this manner had only positive effects on both measured and sonic performance.
The sound from this amplifier is extremely musical, being a true ultralinear connected Class A amplifier, it will give a sound that isn’t fatiguing and is very accurate especially through the critical vocal ranges. It will drive difficult speakers very well and has very good bass control. Running in class A is the best possible sound for this type of design The Tung-sol KT150’s in this amplifier give a beautiful full musical sound with plenty of controlled bass punch and crystal clear highs.
$9995.00
SPECIFICATIONSPower Output - 45 watts per channelFrequency response -1db - 10hz to 50khz
Separation - > 65db
Signal to Noise - > 90db
Signal to Hum - > 80db
Distortion - < 0.05% at 1.0 watt
Hum Level - < 2.0millivolt
Sensitivity - 700mV
Inputs - 4
Speaker output - 8 ohm (6 to 10ohm)
Damping factor >4.0 20hz to 20khz 8 ohms
Weight ~36kg (~80lb)
Artisan 300
The Artisan 300 dual mono amplifier is rated at 18 watts class A per channel into 8 ohms. The Artisan 300 uses hand wound output transformers wound with 32 interleaved windings which offers a level of detail and micro detail found in very few amplifiers.The Artisan uses minimal added global feedback (less than 4db), this is added via a tertiary winding in the output transformer. I have found that using a small amount of feedback in this manner had only positive effects on both measured and audible performance.
The sound from this amplifier is extremely musical, being a pure single ended Class A amplifier, it will give a sound that isn’t fatiguing and is very accurate especially through the critical vocal ranges. It will drive difficult speakers quite well and has very good bass control. Running in cathode bias class A results the best possible sound for this type of design. The mesh plate 300B output tubes in this amplifier give a beautiful full musical sound with liquid vocals and crystal clear highs.
The Artisan 300 represents a state of the art “Lo-Tech” quality vacuum tube amplifier that can be used to glorify the beauty and passion of recorded music in ones home. I trust you will enjoy your amplifier for many years.
$11995.00
SPECIFICATIONS
Power Output………….....18 watts per channel
Frequency response......-1db <10hz - >50khz
Separation...................... >65db
Signal to Noise.................>90db A Weighted
Signal to Hum……………....>80db
Distortion..........................<0.1% at 1 watt rms
Hum Level……………….......<2.0millivolt
Sensitivity.........................500mV
Inputs…………………………..4
Input impedance…………...100k ohm
Speaker output……………….8 ohm (6 to 12 ohm is fine)
Topaz Duo KT150 monoblocks
KT150 Class A self biasing push-pull monoblocks.The Topaz Duo is built on two mirrored chassis.
Uses modified Pi wound output transformers for fully balanced DC resistance, and AC impedance, which equals very low distortion and exceptional frequency response. Secondary windings are made up of 12 layers of 0.40mm wire interleaved within the primary windings.
Runs separate over sized high voltage (600VA) and heater (125VA) power transformers.
Teflon valve sockets, paper in oil coupling capacitors, CDM & Panasonic FC cathode capacitors. English high voltage copper hook up wire and solid copper core signal wire, CMC speaker binding posts.
Transformers manufactured using Australian magnet wire, Australian and Japanese laminations, English and New Zealand bobbins, Australian made covers.
Chassis tops are Australian laser cut 2mm stainless steel (1.2mm SS bottom plates).
Price from $6995.00
SPECIFICATIONS
Power Output - over 45 watts per channel pure class A
Frequency response -3db - 6hz to >75khz
Signal to Noise - >90db A Weighted
Signal to Hum - >80db
Distortion - <0.1% at 1 watt rms (Typically 0.05%)
Hum Level - <3.0 millivolt
Sensitivity - 500mV
Input impedance - 100K
Inputs 1
Speaker output 8 ohm (6 to 12 ohm is fine)
Damping Factor >6 (20hz to 20khz 8 ohm)
Weight ~20kg (~44lb) per monoblock.
Dimensions 440mm x 370mm x 220mm (width x depth x height) per monobloc
Can also run KT88, 6550, KT90 and KT100 type output tubes.
Tempest Duo Monoblocks
KT120/KT150 high powered monoblocks.The Tempest Duo uses valve rectifiers in it's power supply to offer the user a true all valve experience. The power supply of the Tempest Duo uses a massively over sized power transformer rated at 600VA, and also a separate power transformer for heater filaments. It uses dual rectifiers, hand wound filter choke, and European made filter capacitors. What this means is the amplifiers operates whisper quiet and there is never a shortage of power available for those times when no-one is about.
The Tempest Duo shares the same basic chassis as the stereo Tempest with the right hand chassis mirrored to give a balanced look. The output transformers on the Tempest Duo are wound on massive cores with a newly developed winding technique to give a very flat response and balanced current draw. The output transformers on the Tempest Duo are wound with focus on the bass and midrange regions whilst still maintaining extended high frequency response.
The Tempest Duo can be biased to run KT77, KT88, KT90, KT120, 6550, EL34, 6CA7 output valves.
The bias on the Tempest Duo is easily set by the owner. Above chassis adjustment point and build in meter make it a 1 minute task. Once set, it only needs to be checked every 4 to 8 weeks to keep the Tempest Duo running at their best. (Pictured on black stained maple plinths +$300.00) (Pictured with Graphite chrome transformer covers +$900.00)
Price from $7495.00 ($7995.00 with KT150 output tubes)
Power Output - >80 watts per channel
Frequency response -3db - 6hz to >100khz
Signal to Noise - >88db A Weighted
Signal to Hum - > 80db
Distortion - <0.05% at 1 watt rms
Hum Level - <2.0 millivolt
Sensitivity - 1000mV
Input impedance - 100K
Inputs 1
Speaker output 8 ohm (6 to 10 ohm is fine)
Damping Factor >10 (20hz to 20khz 8 ohm)
Weight ~50kg (~110lb)
Time Machine Duo
Time Machine Duo 300B push-pull monoblocks.The Time Machine Duo is built on two mirrored chassis.
Uses modified Pi wound output transformers for fully balanced DC resistance, and AC impedance, which equals very low distortion and exceptional frequency response.
Runs separate over sized high voltage (600VA) and heater (125VA) power transformers.
Teflon valve sockets, paper in oil coupling capacitors, Panasonic Long Life FC cathode capacitors, Arcol bias resistors,
English high voltage copper hook up wire and solid copper core signal wire, CMC speaker binding posts.
Transformers manufactured using Australian magnet wire, Australian and Japanese laminations, English and New Zealand bobbins, Australian made covers.
Chassis tops are Australian laser cut 2mm stainless steel (1.2mm SS bottom plates).
SPECIFICATIONS
Power Output - 18 watts per channel pure class A
Frequency response -3db - 6hz to >75khz
Signal to Noise - >90db A Weighted
Signal to Hum - >80db
Distortion - <0.1% at 1 watt rms
Hum Level - <3.0 millivolt
Sensitivity - 500mV
Input impedance - 62K
Inputs 1
Speaker output 8 ohm (6 to 12 ohm is fine)
Damping Factor >5 (20hz to 20khz 8 ohm)
Weight ~20kg (~44lb) per monoblock.
Dimensions 440mm x 370mm x 220mm (width x depth x height) per monoblock.