Mastersound 300b Compact-thoughts???

This is one of two integrated amps I did not bring in to demo (the other being the Dueundici) due to the low power and lack of speakers to properly show the amplifier.  

I have had the Compact 845 as well as the Evo 300B.  The Evo 300B was an incredible amplifier and possibly my favorite overall integrated they made.  It had twice the power and much more current though so it was able to handle some things the Compact 300B simply wouldn't.  

The Compact 845 is an excellent all-around integrated and the most popular model.  Even with this one, I found the amp to sound great with speakers with 2 or 3 drivers maximum.  Once you started pushing four or more, the amp began losing control of the speaker.  The Evo series does not suffer this fate.

The MastersounD products are very good products but they need to be in the right environment to shine.

Sorry to revive an old thread, but can't find much info on this amp online...

I've been considering this amp since it was recommended to me by the speaker-maker of my speakers, but I have some concerns - notably the 15wpc rating on it. As a SET 300b amp, that seems quite high. I'm used to seeing half that in SET applications for 300b, so I'm a little wary as this may negatively impact tube life - which, considering the cost of these 300b tubes, would be a dealbreaker.

Anyone have any experience, thoughts, insight, etc? Reviews online are all quite old and for previous iterations of this model or for the 300b SE or 845.

@mmcgill829 

I've been considering this amp since it was recommended to me by the speaker-maker of my speakers, but I have some concerns - notably the 15wpc rating on it. As a SET 300b amp, that seems quite high. I'm used to seeing half that in SET applications for 300b, so I'm a little wary as this may negatively impact tube life - which, considering the cost of these 300b tubes, would be a dealbreaker.

These are valid concerns. 15 watts from a single 300b is very high and certainly suggests that the chosen operational points are very aggressive and pushing the 300b quite hard. In this scenario a shortened tube lifespan is very likely. The sweet spot for SET 300b is usually 6 to 8 watts per channel. Now there could be some innovative circuit that can achieve this level of power without stressing the 300b. If so I’m unfamiliar with such.

Charles 

@charles1dad Yeah, that was my worry, especially if I plan on getting Takatsuki or Elrog tubes to put in it. At that expense for the tubes, it would be silly to put them in an amp that is going to make their lifespan dramatically less. They're just too expensive to do that.

It's too bad there's no documentation that I can find about this amp or any measurements done on it to get a glimpse into how it's operating. While I got offered one at a great price and it came recommended, with so much unknown, it's probably better to look for alternative options maybe.

I wanted to experience the 300b sound. So I got the Woo 300b amp for my headphone system. I also put in Takatsuki tubes in them. Honestly my headphone system became incredible sounding. So much so that I had a hard time listening to my $70K main system. The realism, natural musicality, detail… emotional draw. So, this caused me to completely upgrade and reconfigure my main system. Now both my main system have the same character, detail, midrange bloom, emotional connection. It is an all Audio Research Reference system… but you get the same warmth, natural sound, detail, musicality with the foundation series and even the integrated. 
 

Let me suggest, you are going at this in the most difficult way possible. Trying to power a main system with a 300b is a very difficult thing requiring lots of big compromises. You can get the character in a main system and with lots of power by using Audio Research, Conrad Johnson, Cary, or VAC. You can then choose from lots of great speakers.

If you must experience the best the 300b has to offer… get a headphone amp and power some great headphones. You can see my headphone system and main system under userID. A fantastic headphone system will cost 1/10th thst of a main system and you can get the magic of the tube through great high power components made to power the pajority of speakers on the market.