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Author Topic: amp for the truth preamp  (Read 692 times)
Martin1
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« on: November 12, 2017, 02:47:46 PM »

Hello, My name is Martin and i recently bought a the Truth preamp. My amp recently got broke down and even though i am trying to repair it..i think i won't be able to do that. It is turning too expensive to do so, so i think i won't be able to afford to repair it. SO i am trying to find a substitute, preferably a power amp (not integrated) so i can take best advantage of the Truth preamp...Mr Schilling has recommended me to write to the forum and ask the question...what amp or power amp would you recommend to use with the truth in order to get a very good system, and if possible, as affordable as possible. My current loudspeaker is the audio physic virgo with audio physic luna subwoofer. They are rated at 87db, 20 to 150 watt. Also i might get a quad esl-63...and a quad 405 amp...would that be good?. Other options i am considering:
a) nad c350. old and affordable and got good reviews. b) clone made in china based on mark levinson ml-2, or dartzeel nhb-108. but no way to know how god they are. the dartzeel there are some reviews on aliexpress. c) some affordable tube amp...like the
https://www.aliexpress.com/item/HIFI-EXQUIS-manufacturer-6n2-FU32-tube-amplifier-with-headphone-output-Handmade-welding-scaffolding-standard-version/2049087012.html?spm=2114.01020208.3.32.0K5CAG&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_10130_10068_436_10136_10137_10157_10060_10138_10155_10062_10156_10154_10056_10055_10054_10059_100032_100033_100031_10099_10103_10102_10096_10147_10052_10053_10050_10107_10142_10051_10084_10083_10080_10082_10081_10178_10110_10111_10112_10113_10114_10181_10183_10182_10185_10078_10079_10073_10123,searchweb201603_2,ppcSwitch_5_ppcChannel&btsid=568ecf80-3b49-483b-a66f-cab2132837ba&algo_expid=a3f7358b-02e1-4100-a572-284fce686477-4&algo_pvid=a3f7358b-02e1-4100-a572-284fce686477
 in aliexpress. but it has low watt output around 4 watts per channel.

any opinions or what has worked would be very welcome...thank you very much, martin
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Martin1
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« Reply #1 on: November 12, 2017, 02:49:49 PM »

another option i forgot to mention is a version of the hiraga class a amp, available as diy projects......there are in 8 watt 14 watt 20 watt....
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Henry
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« Reply #2 on: November 12, 2017, 06:41:30 PM »

Hey Martin, what amp will you be replacing... and did you like it? 
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Martin1
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« Reply #3 on: November 14, 2017, 05:14:50 PM »

i am replacing a gryphon callisto 2200...i bought many years ago thinking it would had all the power i would ever need, very well built, and very good sound quality...the only thing it turned out to be true was the first one,,,powerwise i think it was ok..reliability ok until now and it is prohibitively expensive to repair...(i am still trying..)and the sound quality was ok but i wasn't enamoured of it at all...SO my answer is no, i did not like it...it wasn't close to sound as real classical concerts i have experienced (Small venues)....NOw i am trying on a quad 405..i heard only once and i think it was ok...musical..maybe not very detailed whatever that means...not heard long enough to get a better idea of how it sounds...
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Martin1
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« Reply #4 on: November 14, 2017, 06:20:12 PM »

i am reading about the benchmark nhb2..any experiences with it? maybe too expensive for me ( i would liek to spend mess of 1000 if possible at all), specially with shipping and import duties, but i would like to know if it could be a good option...
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Henry
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« Reply #5 on: November 14, 2017, 08:49:06 PM »

Martin, I have an Audio by van Alstine (AVA) Ultravalve and really like it.  It's a little over your budget, but makes a healthy 35 tube watts per channel and works well with the Truth.  It seems like 100 watts of solid state. 

Also, AVA makes solid state amps that may be good choices for you as well.  They have been around for decades and make good, reasonably priced, no frills equipment in the good ol' USA.  Check out their web site to see if anything interests you and talk to Frank van Alstine via email or phone.  He can tell you which product may work best for you.

I'm sure others have some thoughts on this and can give some recommendations.  As Ed says, choices are bad...  Grin
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sonic
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« Reply #6 on: November 15, 2017, 10:21:13 AM »

i am reading about the benchmark nhb2..any experiences with it? maybe too expensive for me
Benchmark is overpriced audio jewelry, meaning that it's for the looks and bragging rights.  You won't be getting better audible sound.

Your Audio Physic Virgo speakers are rather power (amperage) hungry speakers.  Your late Gryphon Callisto has good specs in terms of low impedance output.  Amp you want is something that's stable at low impedance.  Commercial amps (AKA PA amp) may be what you want to look into.  Some of them are passive cooling (no fan) so it can work well in home audio setting.  Also, those PA amps are not as expensive as audio jewelries like Benchmark.  Bhringer A500 is one example.
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Martin1
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« Reply #7 on: November 21, 2017, 05:25:34 PM »

Hello, THank you for the suggestions. I looked on Van Alstine site and his products look very interesting, although maybe out of my initial budget. Regarding the Behringer a500 i see very good reviews..but i have the ultracurve pro deq2496 equalizer and its effect on the audio chain is horrible. I bought it many years ago thinking it would be quite transparent and maybe able to equalize the music acceptably in my room, and the effect on the sound is really ghastly...maybe that is the effect of all equalizers. So i am reluctant to try another behringer product..but i see it has very good opinions online, and it is really affordable even if new...Do you have direct experience with it and it performs very well with the Thruth preamp? I see thought it does not need a preamp, so i do not like two preamps in the audio chain...Also i do not know how important is being AB instead of just A class amp, although i understand the power has to be much lower for class a.. Thank you, Martin
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Martin1
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« Reply #8 on: November 21, 2017, 05:26:53 PM »

I could grab a nad c350..i am going to test it...but the balance button is not working properly...
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Henry
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« Reply #9 on: November 21, 2017, 10:59:44 PM »

Martin, if you want to take a chance, this guy is making finished big power class D amps using a new module from Icepower (B&O).  I think it has 800 wpc into 8 ohms at 1% thd.  I don't know real world wattage numbers at decent distortion levels.

This is new, so there aren't any reviews, but the few guys that have heard it claim it to be dynamic, accurate and not nasty in the high frequency range.  The finished amp is $900 plus $50 for shipping.  He's taking orders for the fourth lot to be shipped in January. 

Read about it at AC forum and don't get caught up in the talk about kits; he's only making assembled amps now for only $200 over the kit price.  They are easily assembled.  Also, you can order better connectors and wire, but a tricked out amp would be substantially more $$$.

I bought a kit (earlier in the sale) for the hell of it since it seems I can sell it if it isn't working well for me. Wink  I'm still not convinced the highs are going to suit me.  It should arrive in a few weeks once the chassis is complete and in the seller's hands.

You can read about it here and there's a link to a long forum thread:
https://www.miveraaudio.com/
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sonic
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« Reply #10 on: November 22, 2017, 09:56:47 AM »

i am reluctant to try another behringer product..
It was just one example of amp that's stable at low impedance.  There are many others, some expensive, some cheap.  Just make sure it can handle 3 Ohm impedance since your speakers have somewhat of high current demand in the upper bass to mid frequency region which our hearing is very sensitive to.

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Ed Schilling
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« Reply #11 on: November 22, 2017, 11:38:34 PM »

This one "looks" really good and very inexpensive. Plenty of power. Damping factor and S/N ratio both look pretty good. They say it works with their passive line stage.......there you go!
Ed
http://www.schiit.com/products/vidar
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