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EAT - KT88 Diamond Matched Tubes (Pr)

Tubes

$899.00
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Availability: Backordered
Item: AEATKT88
Description

The EAT KT88S are Quite Possibly the Finest Tubes Ever Made

Built to the highest degree of perfection, the EAT KT88s are uncompromisingly excellent in every aspect of vacuum tube performance.  Measured and audible results confirm these are outstanding tubes, revealing life, breath and soul previously unheard of from a KT88.

The EAT KT88s despite their outrageous price are so exceptional that even the usually reticent Ken Kessler had this to say.

"The EATs are sensational.  Even though the measurements indicate no gain in power, the sound is more robust, with convincing weight and palpable mass, but the real gains were in the midband, the EATs increased intimacy strengthening the sensation of the singer being in the room.  The extra clarity and openness make it much easier to focus on detail typically masked or overwhelmed by louder sounds.  Then, there's the attack & decay capabilities of the EATs, they're quick, almost ridiculously so.  Put on a disc by any virtuoso known for rapid plucking or fingering, no muddle, no delays, no upsetting the timing.  What we have here, my friends, is the valve amp equivalent of Viagra."
– Ken Kessler, HiFi News

Roy Gregory loved EAT KT88s so much he awarded them HiFi+'s coveted Product of the Year!

"Sonically the results are absolutely superb, trouncing generally available examples and bettering even NOS tubes.  Romantic they aren't, but if you want power, transparency, grip, focus, detail and definition, all woven into a singularly convincing whole, then look no further."
Roy Gregory, HiFi+

If that's not enough to convince you, the EAT KT88s come with a 6 month warranty!

Read More Less
Pro Reviews
AV Guide (PDF, 2 MB)

HiFi News (PDF, 516 KB)

HiFi+ (PDF, 67 KB)

HiFi+ "Product of the Year 2004" (PDF, 123 KB)

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Size – included socket: 2 × 4.9 inch

Characteristics:
Plate dissipation (Max.): 40 W
Grid dissipation (Max.) : 6 W
Cooling: radiation
Heater – Voltage: 6.3 V
Heater – Current: 1.6 A

Maximum ratings:
Anode voltage: 800 V
Screen grid voltage: 600 V
Va, g2: 600 V
- Vgl: 200 V
Pa: 35 W
Pg2: 6 W
Pa + g2: 40 W
Ik: 230 mA
Vh -k: 200 V
Tbulb: 250 °C
Capacitances (measured on a cold unscreened valve)
Triode connection
Cgl -a, g2: 7.9 pF
Cg1 -all less a, g2: 9.8 pF
Ca, g2 -all less g1: 17 pF

Tetrode connection
Cg 1 -a: 1.3 pF
Cg 1 -all less a: 17 pF
Ca -all less g1: 12 pF

Push – Pull, Class AB 1, Cathode Bias, Ultra – Linear Connection (40% Tapping Points).

Vag2 (b): 500 – 375 V
Vag2 (o): 436 – 328 V
Ia + g2 (o): 2 × 87 – 2 × 87 mA
Ia + g2 (max. sig): 2 × 99 – 2 × 96 mA
RL (a-a): 6 – 5 k Ohms
Rk*: 2 × 600 – 2 × 400 Ohms
- Vg1 (approx.): 52 – 35 V
Pout : 50 – 30 W
Dtot: 1,5 – 1 %
I.M.D. : 4 – 3 %
Wa + g2 (o): 2 × 38 – 2 × 28.5 W
Wa + g2 (max. sin): 2 × 17 – 2 × 16 W
V g1 – g1 ac: 104 – 71 V
Zout: 4.8 – 4.5 k Ohms

*It is essential to use two separate cathode bias resistors.

I.M.D. intermodulation distortion measured using two input signals at 50 and 6000 Hz (ratio of amplitudes 4:1)

Push – Pull, Class AB 1, Cathode Bias, Triode connection.

Vag2 (b): 400 – 485 V
Vag2 (o): 349 – 422 V
Ia + g2 (o): 2 × 76 – 2 × 94 mA
Ia + g2 (max. sig): 2 × 80 – 2 × 201 mA
RL (a – a): 4 – 4 k Ohms
-Vg1 (approx.): 40 – 50 V
Pout: 17 – 31 W
Dout: 1.5 – 1.5 %
I.M.D.: 5.6 – 5.6 %
Wa + g2 (o): 2 × 26.5 – 2 × 40 W
Wa + g2 (max. sin): 2 × 29 – 2 × 27 W
V g1 – g1 ac: 78 – 114 V
Rk: 2 × 525 – 2 × 525 Ohms
Zout: 4.8 – 4.5 k Ohms

I.M.D. intermodulation distortion measured using two input signals at 50 and 6000 Hz (ration of amplitudes 4:1).

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Test Report (PDF, 76 KB)


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