tubes 4 hifi
 "the path of least resistance is through a vacuum"

HOME Dyna ST-70 Dyna PAS-3 Service & Mods Downloads Bookstore

Tubes 4 HiFi is also known as Vacuum Tube Audio

Our best known product is the VTA ST70 PCB modification for the Dynaco ST-70 amplifier,
that first appeared in a Glass Audio magazine article in 1989.

You can purchase any of our products here from these web pages,
making payment with a credit card through PayPal, or sending us a money order.
Thanks for your support!

Please contact me at anytime to order these items or to inquire about other products.

send email to info@tubes4hifi.com

our famous VTA70 driver PCB upgrade for your amp!

(photo courtesy of customer JJM)

we've been selling this modification/upgrade for the ST70 for 25 years now!!


click here
for our new BOOK store page
also some audiophile CDs, tubes, tools, connectors, and interconnects

ST70 - VTA70 amplifier

ST120 - VTA120 amplifier

MK3 monoblocks

M125 monoblocks

PAS3 preamp

preamp kits
SP6 SP8 SP9 SP12 SP14

PREMIER assembled/tested
plug & play preamps

phono only preamps
PH6 PH10 PH12 PH14 PH15


click here to go to our downloadable Dynaco manuals page


our dealer on the east coast is Bob Latino. . . check out his BRAND NEW Dynaco ST70 kits OR ready-built amps
including the high powered stereo ST120 tube amp and new M125 monoblocks click here!!

you can send email to Bob Latino at: Bob01605@aol.com for info on these complete kits or amps .


visit our "Dynaco Tube Audio Forum"


our Glass Audio magazine article comparison test of ST70 modifications

send email to ROY at: info@tubes4hifi.com




 tubes 4 hifi
 "the path of least resistance is through a vacuum"