Item: 1 pair of Weston Acoustic Topaz KT150 Mono block amplifiers
Location: Adelaide, SA
Price: $3500.00 (Firm) + pp and insurance (New RRP are $5995). Will ship double-boxed as they came from Weston Acoustic.
Item Condition: Present as new but are 2nd hand
Reason for selling: Time to move them along...
Payment Method: Pickup - Cash or shipped EFT only. No PayPal
Extra Info: I am the 2nd owner of these wonderful mono-block push-pull Class-A amplifiers (purchased from SNA / Eggmeister). They are in perfect condition, no scratches, marks on the wood or stainless steel surfaces. The full specifications below are from the Weston Acoustic website.
Included in the sale will be additional tubes: 4 * CV181-ZTreasures HiFi Electron Tubes, 4* 6SN7 Sophia Electric Tubes and 2 * 5U4G Rectifier tubes (Russian Black base/plate I think - what I'm currently using in the amps. The original Cetron 5R4WGB are in their packets).
Look at my thread here on SNA "An update to Frankn system" Posts 159-163 for pictures of unpacking them and condition - they are the same now as they were then. I've added a couple of extra pictures from this morning however the lighting is not good and I only have an iphone. It is raining atm so I'm not taking them outside to photograph.
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 18 layers of 0.25mm wire interleaved within the primary windings.
Runs separate over sized high voltage (600VA) and heater (125VA) power transformers.
CMC Teflon valve sockets, paper in oil coupling capacitors, CDM (Cornell Dubilier Mallory) & Philips cathode capacitors, Vishay thick film 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 - 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
Pictures: YES, and also see my thread "an update to Frankn system" posts 159-163
