As an aging tube guy, I was very interested in this Genz "tube" head. To get the tube sound and feel in under 10 pounds is a
Like many here, I traveled with the mighty V-9 SVT (which stands for "Super Valve Technology." So I don't understand why Ampeg is using it with cabinets and non tube heads!!). 220 watts at 4 ohms was ALWAYS enough, and usually too much. The Streamliner seems underpowered at 600 watts... But for me, the bass knob is set at 9-ish o'clock, robbing some of the perceived power... And adding the extra 2db of the 900 watt Streamliner doesn't seem to mean much (though I haven't compared the 2 power levels side by side).
I like the "streamlined" simplicity! Very "tube amp" like, and seemingly intended as "plug-n-play." The highs are as described many times here - silky, and extended (particularly through horn/tweeter loaded cabs). The bass control shelf is about 55hz... too low for me... But did exhibit a bit of pillow-y sound, as previously described BUT, ultimately, there's something missing in the mids...
The Streamliner does in deed sound like it was designed using the Fender Precision Bass - a match made in heaven, as some have said. And the P is mid dominant... Maybe that's the secret. In fact, all of my solid body basses with RW strings, sound great! However, being a Jamerson/McCartney type, this amp does not have my sound, no matter how I tweak the knobs. No tube amp sustain, harmonics, touch, and maybe a little compression from the 12AX7s when pushed... But nothing like a power output section being pushed... I'm doomed to schlep the vintage "big iron!"
I tried the STM-600 with solid bodies, flats, rounds, single 15s, 2x12s and 2x15 cabs (non with tweeters, BTW)... The 4 ohm ported 2x15 (TL designed, like the Mesa Diesel/Road Ready cabs) sounded good! "Modern," but good! Really big and open (as KJ has said). But with a P type bass, and not with the Hofners...
I love my Hofners! Very complex and rich sounding basses... But not through this Streamliner... It's just not a good amp for hollow bodies with flats.
In a word, disappointing. So, mine is going back, unless someone here wants it.
Like many here, I traveled with the mighty V-9 SVT (which stands for "Super Valve Technology." So I don't understand why Ampeg is using it with cabinets and non tube heads!!). 220 watts at 4 ohms was ALWAYS enough, and usually too much. The Streamliner seems underpowered at 600 watts... But for me, the bass knob is set at 9-ish o'clock, robbing some of the perceived power... And adding the extra 2db of the 900 watt Streamliner doesn't seem to mean much (though I haven't compared the 2 power levels side by side).
I like the "streamlined" simplicity! Very "tube amp" like, and seemingly intended as "plug-n-play." The highs are as described many times here - silky, and extended (particularly through horn/tweeter loaded cabs). The bass control shelf is about 55hz... too low for me... But did exhibit a bit of pillow-y sound, as previously described BUT, ultimately, there's something missing in the mids...
The Streamliner does in deed sound like it was designed using the Fender Precision Bass - a match made in heaven, as some have said. And the P is mid dominant... Maybe that's the secret. In fact, all of my solid body basses with RW strings, sound great! However, being a Jamerson/McCartney type, this amp does not have my sound, no matter how I tweak the knobs. No tube amp sustain, harmonics, touch, and maybe a little compression from the 12AX7s when pushed... But nothing like a power output section being pushed... I'm doomed to schlep the vintage "big iron!"
I tried the STM-600 with solid bodies, flats, rounds, single 15s, 2x12s and 2x15 cabs (non with tweeters, BTW)... The 4 ohm ported 2x15 (TL designed, like the Mesa Diesel/Road Ready cabs) sounded good! "Modern," but good! Really big and open (as KJ has said). But with a P type bass, and not with the Hofners...
I love my Hofners! Very complex and rich sounding basses... But not through this Streamliner... It's just not a good amp for hollow bodies with flats.
In a word, disappointing. So, mine is going back, unless someone here wants it.

