Jason.......You are operating a total of 12 tubes under the top cover, six 12AX7's and six 12AT7's. There is a heater coil in each of those glass bottles radiating BTU's that must be dissipated. Since the only vent holes in the top cover of the preamplifier section are at the rear, I would expect the remainder of the top cover and side panels to be absorbing a portion of those BTU's. Since the top cover is not too hot to force you to remove your hand, it is likely that the preamplifier is working within its design perimeters. Make sure you are providing adequate ventilation. If you still have concerns, you can always mount a small cooling fan on the vent holes to pull additional air through the chassis.
__________________
Dan
STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario
LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113
VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A
|