Which would you choose for good sounding tube preamp for an audiophile new to tubes.


I need your help guys. I would like to add a tube preamp to pair with my reference 200.2 B&K amplifier. My speakers are large ADS L1590 towers ( 90 DB efficiency rating). They were a flagship back in the day. I have had them restored by an ads tech. I am l looking at  a QUICKSILVER LINESTAGE LS PREAMPLIFIER, VTL 5.5 preamplifier, and a Sonic Frontiers SFL-1. All are currently used and on audiomart or audiogon. The Sonic Frontiers is for sale on hi-fi heaven. I purchased from them before and they check out the equipment that is preowned. My system is a little bright and dynamic sounding using the sonata B&K preamp. (There best at the time). I am looking for a little warmth in the sound and no harshness. I want some slam and afraid I will lose it if I go with tubes.  I have had success buying certain units because of the knowledge dispensed through this forum I am a member of Audiogon in good standing. Any help would be great. I appreciate the feedback. 

arichison

Sorry, their amps are all P2P.   Still a good pre.  

I agree! I have the Silver Sixty mono blocks 20 years.

Mike

I owned a 1990’s Tubed CD Player… was warm but completely lacking in details. I can’t help but thinking an ancient preamp would sound similar. The VTL is equally old. The 1990’s tube equipment tended to be really warm but lacking in detail. Therefore, I am thinking look towards the Quicksilver.

I used a 1999 Audible Illusions Modulus preamp till just recently, and it seemed pretty adequate.

What is the OPs budget?

(S)/He mentioned “slam” and the tube amps I have used seem to do pretty good in that regard.
There is no obvious reason that a SS amp would be better “slam”, unless we are talking about a 5W SET versus a 400W monoblock. But the 80-100W push/pull monoblock tube units seems to keep up OK.

I’ve been using QS gear for years. That LS has a low output impedance and it will be fine with any amp. The gain is on the high side (18db). It is a no frills preamp with no balance or mono feature. If you don’t need those features then I doubt you would go wrong with the QS!

 

Specifications

 

Bandwidth 0.1 Hz to 100 KHz +0,-3db
IM Distortion less than 0.08% at 1v output
Harmonic Distortion less than 0.08% at 1v output from 10 Hz to 40 KHz
Gain 18 db
Input Impedance 100 Kohm, 20 Hz-20 KHz
Output Impedance 100 ohms, 20 Hz-20 KHz
Output Polarity inverted
Maximum Input 30 volts RMS, 20 Hz-20 KHz
Maximum Output 60 volts RMS, 20 Hz-20 KHz
Noise 20 microvolts RMS residual IHF weighted noise output with gain control at minimum
Tube Complement 2-12AT7
Dimensions 3″H, 9 1/2″D, 15″W
Front Panel 3 1/4″H, 17″W
Weight 12 lbs.
U.S. Warranty 3 years parts and labor
Tubes 90 days