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1959 Hoffman Tube Stereo console...NOS...Amperex Tubes

Detailed...Punchy...Layered...Sharp...Tight...Quick...Cymbals are smooth, the shimmer is fully coherent...there is no empty spaces in the lower frequencies and no dull edges around vocals...Van Halen is streaming...straight from my phone...I can’t imagine what a proper source would reveal...

This amp has me floored. There is life in the music. There is coherence without effort, the music spills forth without running into itself. There is no competition amongst instruments because they are allowed to exist within their own capacity, not forced to coexist with the rest of the music but instead understood and presented as an articulated and dense expression in and of itself. What you end up hearing is a moving performance, a vivid peek into the force driving the performers...and that’s at 1/2 a watt. It’s too late to go to one watt. The 12” woofers along with a mid(?) and tweeter round out the 3-way array of drivers, which seemingly get the job done effortlessly and exceptionally transparently. This is one case where I would argue that speaker design can only do so much for the amplification taking place in the power and preamp sections of a hi-fi setup...I say this because as I listen at low volume I can observe that the speaker is playing a subordinate role...it is doing what it’s being told and while the components within the speaker itself certainly determine the successful reproduction of the source, it seems to me that the more a speaker ‘gets out of the way’ of the amplification, the better it performs. And by getting out of the way I mean simply reproducing sound in such a way that the driver arrangement and quantity is not excessive, redundant or lacking. What do you all think? Ok, that’s enough. I need to resume my queue. :beatnik:
 
You got the amp fixed? If you don't mind me asking, what was involved in bringing it up-to-snuff?

Thanks! :)
Took this puppy to the amp doctor, didn’t want to risk messing anything up. All the Doc did was stick two new 80mfd 450WV caps under the chassis, and a new CE four section cap on top. Replaced one fried resistor and bada-bing bada-boom, she’s singin:music:

I’ll make a YouTube vid soon and post it for you folks
 
Detailed...Punchy...Layered...Sharp...Tight...Quick...Cymbals are smooth, the shimmer is fully coherent...there is no empty spaces in the lower frequencies and no dull edges around vocals...Van Halen is streaming...straight from my phone...I can’t imagine what a proper source would reveal...

This amp has me floored. There is life in the music. There is coherence without effort, the music spills forth without running into itself. There is no competition amongst instruments because they are allowed to exist within their own capacity, not forced to coexist with the rest of the music but instead understood and presented as an articulated and dense expression in and of itself. What you end up hearing is a moving performance, a vivid peek into the force driving the performers...and that’s at 1/2 a watt. It’s too late to go to one watt. The 12” woofers along with a mid(?) and tweeter round out the 3-way array of drivers, which seemingly get the job done effortlessly and exceptionally transparently. This is one case where I would argue that speaker design can only do so much for the amplification taking place in the power and preamp sections of a hi-fi setup...I say this because as I listen at low volume I can observe that the speaker is playing a subordinate role...it is doing what it’s being told and while the components within the speaker itself certainly determine the successful reproduction of the source, it seems to me that the more a speaker ‘gets out of the way’ of the amplification, the better it performs. And by getting out of the way I mean simply reproducing sound in such a way that the driver arrangement and quantity is not excessive, redundant or lacking. What do you all think? Ok, that’s enough. I need to resume my queue. :beatnik:


Now you got interested. I just picked up a Hoffman console as well with same amp and tuner as yours, also with Amperex tubes (not NOS though) for gas money+. Was told the thing works, however I need to build a DBT before trying to hook things up to my B+K AC power supply. First console that I picked up that got termites damage to the wood console, lol. One thing I already like about the 1129 amp is that the quality of output trannys look to be of higher quality than some other amps I've seen like some Magnavox 6BG5-based amps Can't wait to experience the SET goodness this thing has to offer and am looking forward to your Youtube video!.
 

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One thing I already like about the 1129 amp is that the quality of output trannys look to be of higher quality than some other amps I've seen like some Magnavox 6BG5-based amps Can't wait to experience the SET goodness this thing has to offer
The output tubes in this are 7189s which are essentially the same tube as the 6BQ5s used in the Magnavox. Difference is that they are rated at a higher voltage although plate dissipation is actually the same.

The "T" in SET refers to a triode. The 7189 and 6BQ5 are pentodes so this is a SEP in stock form, not an SET. The output tubes can be wired in triode but they will only put out a fraction of their pentode output. In pentode they're probably ~5 wpc and in triode they would probably only put out ~2 wpc.
 
Now you got interested. I just picked up a Hoffman console as well with same amp and tuner as yours, also with Amperex tubes (not NOS though) for gas money+. Was told the thing works, however I need to build a DBT before trying to hook things up to my B+K AC power supply. First console that I picked up that got termites damage to the wood console, lol. One thing I already like about the 1129 amp is that the quality of output trannys look to be of higher quality than some other amps I've seen like some Magnavox 6BG5-based amps Can't wait to experience the SET goodness this thing has to offer and am looking forward to your Youtube video!.
I ran it about 6 hours the other night but was somewhat let down when I cranked it the day after. I think it’s the speaker setup. I might have to modify to add external speakers
 
I’m thinking of adding provisions for external speakers...would I be able to add them while still allowing for the original console speakers to be plugged in?
 
Glad to see discussion of these. I have one as well. Mine is mono, but had a nice set of tubes and was fantastically clean inside.
 
Two sets of speakers will create loading issues. It will work but expect lower power output and higher distortion. This is only going to make about 4 watts per channel, not much power to waste here.

Also if the stock console speakers are as unimpressive as the ones in mine were, i don't think you'd gain much by leaving them connected. I redesigned the speakers in mine to make them not suck so much. The bass and mid drivers are probably ok, but the crossover design is lousy and the tweeter really isn't much of a tweeter.
 
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