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68.104.193.12
Yep it finally happened. I bailed out of NJ. Although we don't actually have a house YET, I can see that I may need a solid state amp for the extreme part of the hot season. It's already 114 degrees. So I would have to seen how adding a room heater to that mix would play out.
The good news is I remember my Sherwood being pretty good at not being much of a room heater.
The VTA ST-70 is a room heater!
But maybe I can use my Conrad Johnson preamp with the NAD C275BEE amp??
I finally got back into a good place with tubes again. Sure would hate to loose that again.
Charles from his new location Arizona
Follow Ups:
Congrats on the move, I may be moving to Chandler Arizona with in the next few years. Work related, I will be looking into the Hybrid amps like Rouge Audio and Vincent, the are many others but I have read that The rouges with tube rolling sound pretty sweet.
Welcome to the copper state. It's real good living here baring a few issues I dare not bring up. I hope you didn't make the mistake of moving to the Phoenix area aka Los Angeles wanna be without the beach or glamour.
I've lived in Phoenix for 56 years, survived the 122dF of many years ago, and have used vacuumtubed preamps and poweramps LOTS. Currently I use Atma-Sphere M-60s, a stereo pair of which uses 16 output tubes and 8 (or, in mine, 6*) 6SN7GT frontend tubes.
How you operate your music-reproduction system depends on which electrical-rate plan you buy (unless you don't care about how much you pay to Arizona Public Service each month). Mine has peak rates (8.8 cents per KWH) from noon thru 7PM, weekdays, and low rates (4.4 cents per KWH) all other times.
Airtime, welcome to the valley of the SUN (I presume) and enjoy your music.
* I use one A-S gain-reduction plug in each amp.
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
...you can allocate more toward air conditioning. Here just outside the Denver area I'm paying 12 cents per KWH all the time. That's one of the reasons why I run a SS amp in my smallish office listening room in the summer months. I don't have to blast coolness throughout the entire house just to keep my office listening room cool. It stays cooler with SS amplification. Really.
Edits: 06/10/16
But you won't mind 70 in January..
Cheers
K
Welcome to Arizona, I live in Prescott. I have two systems, one for summer SS, and one for winter Tube. I don't listen as much in the summer so I don't mind listening to SS, although my tube amp sounds better. Outdoor activities call my name so I don't listen as much....
I agree with you 100% that most people that live in Arizona arn't going to be inside very much at all!!!! This state is an endless out door park.
My wife and I drove through Payson on 87. You live in one of the prettiest part of the country.
Talk about "out of the frying pan!" I remember reading that the average annual high in Phoenix is still rising. It has yet to stabilize as a result of the continued addition of modern pavement and concrete.
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Buy Chinese. Bury freedom.
We've come close.
I get up at 4am so I can enjoy time outdoors before it becomes uncomfortable. With almost no humidity (usually < 20%, sometimes <10% this time of the year) it's nice until around 10am. I don't mind it at all even later in the day for safe periods of time. Breezes are still refreshing.
That all changes around mid-July when the monsoons roll in driving the humidity up and the temperatures down. Evaporative coolers become useless. No fun getting caught in a dust storm on a bike. By then, the giant heat sink called The Valley of the Sun is saturated. Now you have temperatures averaging 105F with humidity and everything around you radiating heat. Lows are usually in the 90s. Wind is hot, actually makes things worse by pulling more moisture out of your body. August through early October is my least favorite time of the year. Get a lot accomplished indoors (like winter for most folks) and enjoy the NFL (Go Eagles!).
I've had many tube components (both home and pro) over the years. The only time I really noticed a problem was with Joule Electra monos. Can't imagine having any problem with a ST-70.
With a cash infusion and some "horse trading", you can have your cake and eat it too.
Klipsch "Cornwall" speakers require very little power and are truly full range. The 5 WPC or so full pentode SE 6BQ5/EL84 "finals" yield will make "bleeding ears" SPLs possibile. SS rectify the B+ and use "fixed" bias, to hold extraneous heat generation down.
Look for a used "Cornwall" pair on CL and/or FleaPay, as brand new Hope, AR, product is darned costly.
Eli D.
Go to Arizona Hi Fi order a Grommes phi-26 pair with any good klipsch
cornwall, quartet, Forte I
plenty of sound little heat
"Klipsch "Cornwall" speakers require very little power and are truly full range."
I just got rid of my Cornwalls for lack of bass. Had them several months and really WANTED to like them. A perfect match for my little 4W/ch amps in all other respects. AFAIK, no commercial high-sensitivity speaker is really full range, although Klipschorns can come close.
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Buy Chinese. Bury freedom.
TK,
The OP has a SERIOUS thermal problem. If "Cornwalls", as you indicated, have bass extension issues, he needs to go to a multi-amped setup of some kind. The NAD SS amp the OP already owns should be satisfactory for bass duty. Let the OP DIY or commission a preamp/crossover/SE pentode main amp unit and add a bass commode.
Do you think an F 3 of 90 Hz., along with a 24 dB./octave Linkwitz-Riley configuration would "unload" the Klipsch or other suitable high efficiency speakers sufficiently?
Eli D.
I've yet to try a sub that blended well with any of my amps. I built a 24dB all-tube xover a few years ago as a last resort, but even that didn't cut it. The guy I bought the Cornwalls from had an expensive sub, but it sounded awful at any level at which it actually extended the bass. I've concluded that medium efficiency speakers and a larger amplifier (or headphones/tiny listening room) are the way to go with these pristine-sounding tube amps. Klipshorns are another possibility, but my livingroom is too small.
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Buy Chinese. Bury freedom.
Have you tried a SW driven by the speaker level I/Ps? Don't "daisy chain". Instead, simply connect the SW in parallel with the speakers already present. The SW's SS amp will pick up some of the tubed main amp's sonic signature. Adjust the SW's controls to fill in underneath the main speakers, where they are deficient.BTW, 16 AWG OFC zip cord is quite good enough for connecting the SW to the main amp. Remember, the SW's crossover presents a high impedance to the main amp below the "corner" freq. and above the "corner" freq. no load is present, making that high impedance too.
Eli D.
Edits: 06/07/16
The possibility of amplifying hum and noise from speaker-level signals would ordinarily turn me away from that. However, I've seen amplification from that level work OK in other applications. Yes, it's something to try when I get re-motivated on this subject. Thanks for the suggestion!
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Buy Chinese. Bury freedom.
First off congratulations on the move. I'm glad that it's working out well. Man 114 degrees. It was in the 70's here, San Francisco Bay Area, and I went running and thought it was on the hot side.
Does the tube stuff really give off that much heat? Most of my solid state stuff seems to put off about as much heat as my tube stuff does with one amp, Van Alstine Fet Valve EX even giving off more. Anyway, maybe add a slow large fan to the top of your VTA70's cage. My ST70 doesn't seem at all on hot side even though it's biased to 50ma a tube but I'm not running a GZ34 in it.
114....you must be in Phoenix. It was a chilly 109 in Tucson yesterday. No serious heat generating problems with the Latino ST 70 on my end. That said, didn't even consider turning on the 845 amp. Now that's a truly serious space heater.
But it's a dry heat.
....until the monsoon season.
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