From the aguilar website -
I have 4 brand new KT-88's, not the 6550's. they are functionally the same and i think better sounding.
Manual can be found here - http://www.aguilaramp.com/pdf/support_manuals_db359.pdf
Specifications and features:
All noise measurements are “A” weighted.
Output Power: 200 watts RMS. This is into 4 or 8 ohms.
Noise: -80 dB
Fuses: 1 external 7 amp for 100 – 200 VAC operation.
(3.5 amp for 220 – 230 VAC operation).
1 internal 2 amp Fast blow
Power tubes: Four premium Aguilar AG6550C power tubes.
Preamp tubes: Two 12 AX7 and one 12 AU7.
Transformers: Custom designed toroidal output transformer for ultra-wide
bandwidth. Power transformer is also toroidal.
Outputs: 2 ¼” speaker outputs. One 4 ohms, one 8 ohms.
Inputs: One active input 39K ohm, one passive input/1meg ohm.
EFX Send: Variable send level.
EFX Return: One return with –20 db to 0 db compatibility.
Cooling: Ultra-low noise fan regulates the operating temperature of the
Weight: 50 lbs.
Chassis: Steel construction provides sturdiness without excessive
weight. Access to tubes is provided through rear of unit for convenience and is
isolated from any dangerous voltages.
Components and workmanship: Only the highest quality components and
workmanship are used in Aguilar products.