definitivo logo vintage club con motto senza www stondato

/ Quick Informations / VTL ST 85 Power amplifier

VTL ST 85 Power amplifier

Massimo Piantini on 31 marzo 2014 - 22:22 in Quick Informations, Video, HiFi Video - Pre / Amp, Amplification, Equipments

VTL ST 85 apertura con logoVTL ST 85 Power amplifier

Storico finale stereo della factory americana la cui dinamica potenza ha permesso a tanti audiofili appassionati del suono valvolare di pilotare agevolmente anche diffusori difficili come alcuni ostici modelli di  Jim Thiel….. Leggi tutto

ingleseStereophile

 If you’re thinking you’ve just heard the war cry of Tim “The Tool Man” Taylor, from TV’s long-running sitcom Home Improvement, you’d be…wrong. No, that was Luke “The Tube Man” Manley, from high-end audio’s long-running manufacturer VTL…..See more

 

 

 

 logo vintage club quick info

 

 

 

VTL logo

 

VTL ST 85 Power amplifier

 

 

VTL ST 85 , storico finale stereo della factory americana la cui dinamica potenza ha permesso a tanti audiofili appassionati del suono valvolare di pilotare agevolmente anche diffusori difficili come alcuni ostici modelli di  Jim Thiel. I suoi quattro tubi EL34 che lavorano solo in configurazione tetrodo, governati dai robusti trasformatori d’uscita, regalano il classico suono delle valvole, ma senza scadere in morbidezze e mollezze dinamiche.

 

VTL ST 85 1

 

 

Precursore delle moderne amplificazioni VTL, questo ST 85 è stato un finale “significativo” nel panorama del marchio, nonostante fosse una elettronica non costosa, poiché ha segnato il passaggio tra la vecchia e la nuova serie, pur nella scia della tradizione sonica del marchio.

L’attuale modello ST 85 in produzione differisce poco, nella sostanza, dal precedente modello, se non nella capacità di lavorare anche a triodo, adottando sempre quattro tubi EL 34 e fornendo una potenza di 60 watt per canale (circa la metà a triodo).

 

 

SONY DSC

 

 

Se si riesce a trovare un esemplare in perfetto stato si avrà la certezza di un suono ricco della magia valvolare targata VTL 

Quotazione: dai 1.500 ai 1.700 euro (per un esemplare in buono stato secondo le condizioni).

Bruno Fazzini

 

 

VTL ST 85 3

 

Stereophile

VTL ST-85 power amplifier

By Lonnie Brownell • Posted: Feb 26, 1999 “More power!!!”

If you’re thinking you’ve just heard the war cry of Tim “The Tool Man” Taylor, from TV’s long-running sitcom Home Improvement, you’d be…wrong. No, that was Luke “The Tube Man” Manley, from high-end audio’s long-running manufacturer VTL, and he’s trying to convince me that, when it comes to amplifier power, more is definitely more.

One ST-85 is fine when you’re driving these Joseph Audio RM-7si’s, and probably with the Thiel CS.5s, but I think those NHT 2.5i’s would work better with two.”

 

 

VTL ST 85 7

 

 

“Maybe so, Luke, but how’s about I go with just one amplifier for a while? After all, that’s what most people would buy, at least at first. Then I can drop in another one and see what that does.”

Luke agreed, and left me to my listening. I was surprised that he had that reaction; after all, the ST-85 is rated at 85Wpc. Oh—that’s into four ohms. VTL doesn’t quote a rating into 8 ohms, since the VT-85 is optimized for a load of around 5 ohms, but Luke says that the 8 ohm rating would be around 70Wpc. That still strikes me as plenty of power, but Luke seemed pretty adamant. Maybe two ST-85s would help—if help was needed. After all, you can’t judge a component by its specs. You’ve got to listen……..

 

 VTL ST 85 5

 

 

Conclusion 
Need an amplifier? Stereo, specifically? Do you have champagne tastes but a beer budget? (Okay, so “beer” here means “ultra-premium microbrew.”) And, to complete our qualification questionnaire, would you like a well-defined upgrade path so you can improve your system in a straightforward, no-brainer manner as finances allow?

If so, step right up. The VTL ST-85 is solidly built and a breeze to use—biasing is easy, there’s only one output tap, and it has a cover to keep nosy pets and kids from getting burned. It offers outstanding performance driving real-world speakers, performance so good that I’ll bet my last EL34 you’ll be as amazed as I was at the improvement when you upgrade by adding a second ST-85. After that, if you want to keep going up the VTL amplifier ladder, there are plenty of rungs to climb…but that’s another story (footnote 2).

 

VTL ST 85 2

 

 

This story is about the ST-85, and it’s one with a happy ending. The ST-85 is, in many ways, the finest amplifier I’ve had in my system. (The Bryston B-60R integrated is its main rival.) The VTL imparts a 3-D sense of the original event while retaining truth of timbre, a combination that very few components can match, at this or any price. Very highly recommended.

 

Didascalie figure

 

 

Vtl st 85 fig1

Fig.1 VTL ST-85, risposta in frequenza a 1 watt/8 ohms-2 watt/4 ohms-a 2.83 V.

 

Vtl st 85 fig2

Fig.2 VTL ST-85, segnale a 10kHz  su 8 ohms

 

Vtl st 85 fig3

Fig.3 VTL ST-85, distorsione d’intermodulazione vs frequenza a 4W su 2 ohms, 2W su 4 ohms, 1W su 8 ohms, a 2.83V.

 

Vtl st 85 fig4

Fig.4 VTL ST-85, forma d’onda a 1kHz a 2W su 4 ohms (top).

 

Vtl st 85 fig5

Fig.5 VTL ST-85, distorsione (%) vs Potenza d’uscita continua: 8 ohms, 4 ohms, 2 ohms.

 

 

VTL ST 85 apertura con logo

 

 

 

Caratteristiche tecniche

Amplificatore finale stereo a valvole

Valvole adottate: 4 EL 34, 4 12AT7.

Massima potenza d’uscita: 85 W pc su 4 ohms.

Distorsione d’intermodulazione: <3% da 20Hz a 20kHz.

Rapporto segnale/rumore: 95dB a 120Hz.

Sensibilità d’ingresso: 1.1V.

Impedenza d’ingresso: 100k ohms.

Impedenza d’uscita: 0.9 ohms.

Consumo: 175W; a piena potenza 550W.
Dimensioni38,1 L x 15,2 H x 30,5 P

Peso: 17,24 Kg netto.
VIDEO

 

 

 

 

 

0 POST COMMENT
Rate this article

Send Us A Message Here