B&K Components ST-140 Amplifiers

4.29/5 (21 Reviews) MSRP : $550.00


Product Description

150 watt monoblocks (1989-1995)


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Reviews 1 - 5 (21 Reviews Total) | Next 15

User Reviews

Overall Rating:5
Value Rating:5
Submitted by karister a Audio Enthusiast

Date Reviewed: May 3, 2009

Bottom Line:   
This amp is Awesome, very musical and I'm using it with the pro-5 pre amp. I've used couple of other well known amps but I been driving them with my Vandee's excellent. Very detailed and awesome low end very tight and precise bass response. I like the fact they have the front handles and never overheats, as it has plenty of ventilation. The other thing I like about it is it's real raw power and can make older quality speakers sing goood.

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Used product for:   More than 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995



Overall Rating:4
Value Rating:5
Submitted by gbr1964 a Audio Enthusiast

Date Reviewed: February 5, 2007

Bottom Line:   
i live in canada. i purchased these amps (dedicated mono blocks) from the U.S. on ebay last fall, but didn't hook them up until recently. i have owned mono'd bryston 4B's, & 7B's before, but have downsized my system for practical and economic reasons (read: new baby !). i was using my old dynaco briefly before hooking these up. the 4B's always sounded 'gainy' to me. the 7B's not so, but still very powerful. these amplifiers are musical. subtle. i was wonderfully surprised.

i did separate them from one another (on the floor), and noticed an immediate improvement in every aspect.

i listen to older popular music. as i started to listen to these, i was soon back to my favorite CD, 'Famous Blue Raincoat' by jennifer warnes. this CD was, and still is, wonderful. as it played, i was drawn in to the songs, listening to four tracks, instead of just the one i had intended. i noted that my girlfriend had also been drawn in, as she stopped doing what she was, and joined me on the love seat.

jennifers' voice was pure, and instruments were in place in the soundstage. the soundstage itself was excellent in width,and depth. my girlfriend made comments about the songs now, even though she had heard them many times before. the bass was full, with less authority than the bryston's, and maybe better because of it ?

i next put on 'brothers in arms' by dire straits. 'your lastest trick' sounded very good, prompting me to bring out the album version. the record promptly outdid the CD. the soundstage had good depth, much deeper than the rear wall. again, everyone was placed well within the soundstage, and you could 'see' them move around.

i will say that the amps present a more refined, relaxed quality, to certain songs. they are very easy to listen to, with no fatigue.

other equipment:
esoteric cd player
counterpoint sa-7.1 pre amp
canare interconnects and speaker cable
magnepan mmg's
hsu research sub

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Used product for:   1 to 3 months

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995

Price Paid:    $500.00

Purchased At:   ebay



Overall Rating:5
Value Rating:5
Submitted by jgrooves a AudioPhile

Date Reviewed: February 12, 2006

Bottom Line:   
A peach, an absolute peach!!! I've owned this unit since new (1985), yep 20 years ago, with never a lick of trouble. It has driven, with astonishing musicality, Boston, Vienna, Quad 57 and 63, and Martin Logan loudspeakers. Smooooth baby smooooth. Yes I've owned more expensive amps but have always returned to the ST140. This is a VERY natural sounding amp, if there is such a thing. It just sounds right to these ears, never harsh or etched, not bloated or muddy, just right. I love this little gem!!!!

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Used product for:   More than 1 year

Duration Product Used:   AudioPhile

Product model year:   Pre 1995

Price Paid:    $595.00

Purchased At:   Oceanstate audio



Overall Rating:5
Value Rating:5
Submitted by donbagley a Audio Enthusiast

Date Reviewed: January 16, 2006

Bottom Line:   
I bought mine in 1989! Haven't been using it lately because I'm into five channel sound. I'm using a receiver, and I miss my B&K's warm sound. That blooming bass! Someday I hope to get it back into the system with a multi-channel pre-amp, but for now it rests in dry storage in its original packing. Long live the ST-140!

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Used product for:   More than 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995

Price Paid:    $500.00

Purchased At:   Neal's Speakers, Sac



Overall Rating:4
Value Rating:5
Submitted by Theresamarie1 a Audio Enthusiast

Date Reviewed: March 9, 2004

Bottom Line:   
I've had this amplifier for around 18 years or so, so it must be one of the first models. It didn't come with a removable power cord and the outputs are on either side of a center heat sink. It runs fairly hot, but this hasn't effected the reliability as it's been left on for most of the 18 years and still going strong. The only thing ever to go wrong was the lighted power switch, which I have replaced. One of only weaknesses IMHO is the power cord which was the size and weight of a typical table lamp. I understand later models had an IEC. I suspect that this is why it's transient response on the bass end was little weaker than it should be. In my renewed quest, of recent, to upgrade my system I thought I'd put bigger power cord on it and put on a custom 10 gauge homebuild cord. Wow, what a difference. The soundstage and overall bass response improved dramatically. Now it's not just a great amp, it's supurb and I think I'll be keeping it for a few more years. In fact I may buy a second one and have it converted to mono just to get a little more "oomph".

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Used product for:   More than 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995

Price Paid:    $550.00

Purchased At:   City Stereo




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