2. amps-preamps
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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. 

128x128arichison
ditusa's avatar
ditusa
1,757 posts
 

Maybe look at a Schiit Freya + 

Mike

https://www.schiit.com/products/freya-1

yogiboy's avatar
yogiboy
5,504 posts
 

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
cey's avatar
cey
206 posts
 

whats ur budget?

ok, for under a grand:

above all, audio by van alstine transcendence 10 RB also known as T10. get it from frank van alstine for a grand, or get it used. fantastic headphone feature. i think theres one on fleabay fight now that the guy keeps relisting. you can prolly get it for a fair price. itll drive ur amp just fine. quality at this price point is off the chain. add a fantastic phono stage for $379 avahifi.com 

bottlehead moreplay or foreplay. everyone loves it. comes as a kit new but very budget used.  high output impedance by modern standards. dunno what amp to pair it with, but everyone likes this. i reckon will want an amp with very high input impedance, tho i dunno how much.

rogue audio. folks really dig the rogue audio tube preamps

used gear under $1000:

the clasic: a restored dynaco pas-3 or 3x. unmodded its a lil noisy, and youll need an amp with at least 100k in put impedance. a cheapo is adcom gfa 535. the good one is only gra-535. 

scott and fisher got some great tube pres with good phono sections. 

quicksilver but i cant remember the name Audible Illusions Modulus, but i think its hybrid.

Anthem PRE 1L right now on fleabay. IIRC these are "warm but good." 

bottlehead moreplay/fureplay

best of luck!
 

cey's avatar
cey
206 posts
 

after rereading ur post, i suggest  audio by van alstine fet valve preamp. wont sound very tubey. the Transcendence 10 sounds a lil tubier. 

i have the fet valve RB, which has no features. nothing. just volume and selector. i dont really care about features, and oneof my other preamps has a bajillion in case i need any or feel like usin some. 

avahifi.com

a used conrad johnson PV8 or PV5 will give u classic, elegant tube sound. i have the 8, which is the odel that replaced the 5. the 8 is $1200, and the 5 usually goes for a little bit more. its the more desirable model and the more classic sound, tho the 8 is an upgrade in performance, noise, etc. now, it aint  a vintage tube sound but certainly a high class classic tube sound. 

erhard audio makes kickass tube preamps as well. 

zazouswing
140 posts
 

I’ve had a lot of luck with the Icon Audio gear. Currently using an LA 4 in one system. They don’t get a lot of attention here and I’m not certain why. I would make certain whatever you get is tube rectified. I’m generally of the impression that a tube amp with SS rectification is more SS than tube - you are listening to wall power after all. Impedance needs to be considered as others have pointed out. Finally, with 90db sensitivity, I imagine you don’t need a lot of gain. Most preamps have too much gain in my opinion. Just like final amps, tube gain is not in the same category as SS gain - for reasons I’ll never understand. 9bd gain in a tube preamp should get you there. 

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