Description: Rated power: 35Wpc (15.44dBW/8 ohms), 20-20kHz, at less than 0.25% THD. IM distortion: less than 1% up to 30W. Frequency response: 20-20kHz ±0.5dB at rated power. Input sensitivity: 1.3V.
Dimensions: 13" W by 9.5" D by 7" H. Weight: 35 lbs.
Price: $995 with standard black finish, $1095 with chrome chassis (1992); no longer available (2004). Approximate number of dealers: 220.
Manufacturer: Panor Corp., 125 Cabot Court, Hauppage, NY 11788. Tel: (631) 434-1200. Web: www.dynaco.com.
search
Sidebar 1: Specifications
Review system
I hooked the amps up to my hi-fi rig: Aunt Corey's Homemade Buffered Passive Preamp, Audio Research SP-14 phono stage, Well-Tempered Record Player fitted with the Sumiko Blue Point cartridge and Analog Survival Arm Wrap, the Proceed CD Library 100-disc multi-player, Theta DS Pro Basic II processor driven via Theta's excellent digital cable by either a JVC XL-Z1050 CD player or the dig-out jack of the CD Library, and ProAc Response Two speakers seated on the back-breakin' heavy-metal Target RS2 stands. Interconnects were Kimber KCAG except for Straight Wire Maestro between…
Measurements
The ST70 Series II, like most tube amplifiers, ran quite warm after its preconditioning test and in normal operation. It was noninverting, and though the measured DC offset was generally below 10mV, it was also unstable, as it was with the Nobis. The unweighted wide-band S/N ratio of the ST70 II measured 60dB, referenced to 1W into 8 ohms.
The input impedance of the ST70 II was quite high—over 330k ohms—which is typical of many tube amplifiers. Matching to the output of any reasonably designed preamplifier should present no problem. Its output impedance from the 8…
Manufacturer's Comment
Editor: My response to Corey's incompetent review of the Stereo 70/II should be just that—a letter to Corey:
Point/Counterpoint: Corey. You incredibly misguided wordmeister. If, as you say, you want to find the best-sounding affordable tube gear, the new Stereo 70/II should have lit your fire. After all, every major audiophile publication in the world has rated the ST-70 as a great value, with The Abso!ute Sound concluding that its "clarity and detail are nothing less than stunning."
First of all, using a ProAc Response Two with a sensitivity of 86dB…
Lera Auerbach is an important new classical composer.
Stop!!! Freeze!!! Do not run from the room in search of silver bullets, wooden stakes, garlic, or a crucifix. Defenses, supernatural or otherwise, will not be necessary. For two reasons.
First, Ms. Auerbach's music, at least as represented on her new BIS CD, 24 Preludes for Violin and Piano (BIS CD 1242), is tonal and melodic. While they exhibit touches of modernism in their nods in the directions of Prokofiev, Shostakovich, Schnittke, and Messaien, on the whole Auerbach's 24 Preludes hark back to the 19th-century tradition of…
A different-drummer loudspeaker
To judge from his Arpeggione loudspeaker, Jean-Marie Reynaud (footnote 3) is an individualistic and perhaps even idiosyncratic loudspeaker designer in the mold of Paul Klipsch, Amar Bose, Irving M. "Bud" Fried, and Dick Shahinian. The Arpeggione is the floorstanding version of the Twin Mk.3 bookshelf speaker, having the same 6.5" mid-woofer and 1.5" soft-dome tweeter. The differences being cabinet volume and woofer loading, the Arpeggione has more bass extension and volume than the Twin. Its price increment over the Twin ($1200 vs $895) seems quite…
To judge from his Arpeggione loudspeaker, Jean-Marie Reynaud (footnote 3) is an individualistic and perhaps even idiosyncratic loudspeaker designer in the mold of Paul Klipsch, Amar Bose, Irving M. "Bud" Fried, and Dick Shahinian. The Arpeggione is the floorstanding version of the Twin Mk.3 bookshelf speaker, having the same 6.5" mid-woofer and 1.5" soft-dome tweeter. The differences being cabinet volume and woofer loading, the Arpeggione has more bass extension and volume than the Twin. Its price increment over the Twin ($1200 vs $895) seems quite…
Ever since I installed dedicated power lines for my multichannel system, I've been wrestling with the issues of surge protection, power conditioning, and voltage regulation. I start with a bias based on decades of happy listening without being concerned about any of these problems, and my belief that competent electronic components must be, and are, designed to perform in the real world. After all, whether the device's AC power supply is a traditional transformer-bridge-reservoir or a switching supply, its output should be a DC source that is sufficient to let the active circuitry meet its…
The PS Audio Power Director 3.5 ($995) contains three of PS Audio's high-current Ultimate Outlets: two connected to four receptacles each, and the third connected to two, for a total of 10. The UO technology is based on a large balun (transformer) to block line noise. However, useful bells and whistles have been added: 1) Each of the three UOs can be programmed for on/off delay or to remain always powered; 2) additional filtering and isolation are added between the UOs; and 3) coax connections on the rear panel serve to block voltage surges that might otherwise enter through a cable or…
Sidebar: Records in the Round
REVUELTAS: Homenaje a Revueltas Werner Herbers, Ebony Band; Juan Carlos Tajes, reciter Channel Classic CCS SA21104 (SACD) This selection of Revueltas' works includes his most famous, Sensemayá, and, arguably, his greatest, Homenaje a Federico Garcia Lorca. Played with style and sympathy and recorded with transparency and impact, this is one of the most satisfying multichannel discs yet.
GRAHAM ASHTON BRASS ENSEMBLE: Music for Organ, Brass, and Timpani Duncan Patton, timpani; Anthony Newman, organ; Graham Ashton Brass Ensemble Sonoma CSNR 001 SA (…
"Bugger!" A Pennsylvania state trooper had stepped out from behind the overpass on the Turnpike and was aiming his radar gun straight at me. I reflexively jammed on the anchors, which was a) pointless and b) downright dangerous, considering I was in the middle of a phalanx of cars and trucks all cruising 5-10mph over the speed limit. But what can you do?
I was driving home from Indianapolis, where I'd had an intense three days at Expo 2004, the trade show promoted by the Custom Electronic Design and Installation Association (CEDIA). The 12-hour car trip allows for a more effective…