McIntosh MHA200 Impressions
Nov 21, 2021 at 12:00 PM Post #586 of 893

doggiemom

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...move gently on the gain control.
The woman who cleans our house every couple of weeks is big on dusting. She unintentionally turned the volume knob on the MHA200 up to max last time she was here dusting, and I didn't realize it so just plopped my headphones on and started playback.... Ouch! :triportsad: At least now I know that the amp can get plenty loud!
 
Nov 21, 2021 at 12:45 PM Post #588 of 893

qboogie

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The woman who cleans our house every couple of weeks is big on dusting. She unintentionally turned the volume knob on the MHA200 up to max last time she was here dusting, and I didn't realize it so just plopped my headphones on and started playback.... Ouch! :triportsad: At least now I know that the amp can get plenty loud!
Whoa. I'm sorry for your ears. If you watch the Z reviews video (say what you will about his content) on the mha200, he uses a piece of sticky tack to secure the volume knob so that doesn't accidentally become ear splitting
 
Nov 24, 2021 at 1:39 PM Post #589 of 893

Crowbar44

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OK...so my MHA-200 has developed significant static in the left channel on startup...it goes away once the amp in warmed up after 30 min...

I suspect a bad tube...

Question...do the tubes just "pull out" on the MHA-200? Any special considerations when pulling tubes?

Plan to swap the left and right tubes to see if the static switches channels...

Many thanks all!
 
Nov 24, 2021 at 4:59 PM Post #591 of 893

u2u2

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OK...so my MHA-200 has developed significant static in the left channel on startup...it goes away once the amp in warmed up after 30 min...

I suspect a bad tube...

Question...do the tubes just "pull out" on the MHA-200? Any special considerations when pulling tubes?

Plan to swap the left and right tubes to see if the static switches channels...

Many thanks all!
First time out the tubes will be on the very tight side. Just work them slowly up with a little patience and an eye to keeping them aligned so you don’t bend the pins. I suggest a little Deoxit or similar on the pins when you reinstall them. Makes it much easier and that alone may solve the problem. I am on my second MHA200 and third set of OEM tubes… 2 X red plates and now static as well. Power tubes every time so I would check those first. On the plus side, if you need to replace any tubes there are many good performing and affordable tubes available for this amp.
 
Nov 24, 2021 at 5:09 PM Post #592 of 893

rreynolds

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OK...so my MHA-200 has developed significant static in the left channel on startup...it goes away once the amp in warmed up after 30 min...

I suspect a bad tube...

Question...do the tubes just "pull out" on the MHA-200? Any special considerations when pulling tubes?

Plan to swap the left and right tubes to see if the static switches channels...

Many thanks all!
They're easier to take out if you add a little wiggle, same with inserting them in. Rolled some NOS RCA's in place of the stock tubes.
 
Nov 27, 2021 at 7:23 AM Post #594 of 893

xtiva

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same here, i heard static on my HD800s when the volume at 0, not on abyss 1266 though

I had exact same issue with HD800, only on the right hand side. Though when removing the RCA/XLR cable, the noise went away.
 
Nov 29, 2021 at 9:08 PM Post #595 of 893

Yesthereisgasinthecar

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hello, wanted to be my first tube amp… I have Hugo2, Hifiman Ananda. I fell in love with mcintosh. But I don't have that much money yet, I'm considering a cheaper option - xDuoo TA-26 And eventually Macintosh in future. do you think this will be a good option for dac hugo2?
Absolutely. I personally do not care for the SE headphone out on my Hugo 2 with headphones (IEMS seem fine) and use tube amps to warm the sound up a bit. Buy what you can afford, enjoy the music along the way, and the aspirational gear will eventually come.
 
Nov 29, 2021 at 9:38 PM Post #596 of 893
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Whoa. I'm sorry for your ears. If you watch the Z reviews video (say what you will about his content) on the mha200, he uses a piece of sticky tack to secure the volume knob so that doesn't accidentally become ear splitting
😳 ouch!
 
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Nov 30, 2021 at 2:09 PM Post #597 of 893

Crowbar44

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They're easier to take out if you add a little wiggle, same with inserting them in. Rolled some NOS RCA's in place of the stock tubes.
Yup - it turns out one of the 12BH7a's went bad. When I swapped the 12BH7a's from left to right, the static moved from left to right...though once the amp is warmed up for about 30 min, the static is almost completely gone.

Stock tubes are about 6 months old...but full disclosure, I accidently left the amp running continuous sound via a video game for around a week a few months ago - so I'm not completely surprised a tube went bad...

I have a new set of stock 12BH7a's on order from McIntosh...of note, McIntosh only warranty's tubes for 60 days...

Does anyone know who makes the stock 12BH7a's for McIntosh? Suspect I could probably save $20 a tube going that route...

Cheers
 
Nov 30, 2021 at 2:30 PM Post #598 of 893
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Yup - it turns out one of the 12BH7a's went bad. When I swapped the 12BH7a's from left to right, the static moved from left to right...though once the amp is warmed up for about 30 min, the static is almost completely gone.

Stock tubes are about 6 months old...but full disclosure, I accidently left the amp running continuous sound via a video game for around a week a few months ago - so I'm not completely surprised a tube went bad...

I have a new set of stock 12BH7a's on order from McIntosh...of note, McIntosh only warranty's tubes for 60 days...

Does anyone know who makes the stock 12BH7a's for McIntosh? Suspect I could probably save $20 a tube going that route...

Cheers

JJ makes the tubes you are asking about.
 
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Nov 30, 2021 at 4:02 PM Post #599 of 893

Crowbar44

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JJ makes the tubes you are asking about.
Thanks Jason - interestingly, can't find a price online for the JJ 12BH7A that is cheaper than what McIntosh is charging...guess I'll stick with stock.
 
Nov 30, 2021 at 4:07 PM Post #600 of 893
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Thanks Jason - interestingly, can't find a price online for the JJ 12BH7A that is cheaper than what McIntosh is charging...guess I'll stick with stock.

Probably because McIntosh is their biggest client so they price match to keep McIntosh happy. The 12BH7a doesn’t really affect the sound so that tube value from nearly any supplier is very likely going to keep the MHA200 sound signature in tact.
 
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