McIntosh MA9000 temperature in standby

Hello,

My system consists of McIntosh MA9000 with DA2 DAC, McIntosh MT10, Burmester BA31 and IFI Zen Streamer.

I noticed that the temperature of the integrated amplifier (heatsink) is about 102°F (39°C) at a room temperature of 79°F (26°C).

I performed the following test by increasing the volume in 3 steps:

1. 30% volume for 15 minutes: heatsink temperature -106°F (41°C)

2. 50% volume for 15 minutes: heatsink temperature -117°F (47°C)

3. 70% volume for about 15 minutes: heatsink temperature -145°F (62.7°C) - the power was cut off

I would like to know if 55°F (13°C) on top of the room temperature is normal for McIntosh amplifiers in standby.

Thank you in advance for your support

constantin197003-15-2022 11:33am

overthemoon Details Discussions Posts This discussion Message User 417 posts 03-15-2022 at 05:47pm Copy Comment URL Report Comment Edit Delete I don't recall my MC302 ever being not room temperature when in standby and much props for listening at 70%!
imhififan Details Discussions Posts This discussion Message User 2,181 posts 03-19-2022 at 05:37am Copy Comment URL Report Comment Edit Delete "standby" and "idle" are two different things! In "standby", all the circuits in the integrated amplifier are shout-off except drawing small current to provide power to lite up the "standby" LED and maybe some control circuit. Therefore the heatsink should be at room temperature. At "idle", all the circuits (DAC, preamp section, power amp section, control circuits) in the integrated amp are on, only there's no source signals input. The class AB power amp section will run at its class A bias. Hence the heatsink temperature is higher than ambient temperature.
constantin1970 OP Details Discussions Posts This discussion Message User 3 posts 03-20-2022 at 03:24pm Copy Comment URL Report Comment Edit Delete Thank you for your reply. The integrated amplifier was in standby when the temperature was about 102°F . I contacted McIntosh and I was told to send it to service if temperature increases again while in standby.