I came accross a well-used Acoustic 150 head, tried it with a Yorkville 2 - 10" bass speaker cabinet, and immediately purchased the Acoustic 150 for $200 Canadian funds. Rather than including the bass parts with my other organ/elec piano parts into my keyboard amp, I can now play the bass parts seperately into the Acoustic amp for much improved thump and volume. Since the head initially exhibited an annoying buzz and quick decay time, I referred it to the repair department at YORKVILLE SOUND, and, while it took about 6 weeks, the repair guys did a great job of reducing the buzz to a barely noticeable hiss, and if needed, my bass sounds decay naturally and sonically without breaking up.

Since this amp has no bias/gain control, the sound module impedance causes so much volume output, that I can not turn the volume up past 1.5 even during live shows!! What this amp has though, is an incredibly warm and punchy sound, and by midi-ing 2 bass sounds an octave apart, and the higher part detuned, I get terrific tube-like warmth, and even trebly brightness, especially when I use the "guitar" channel. The bright switches for each channel are NOT NEEDED...they add too much treble!! By the way, this amp has 2 channels, with 2 inputs each, how handy is that? I'm totally happy with this amp, especially, since Acoustic amps were the ones used by the original DOORS in the late sixties !!

Construction	100%
(the proverbial tank, has handy power cord spools to keep the cord out of the
way when moving. )
Clarity	98%
(especially on the guitar channel)
Versatility	100%
(I have midi-ed multi synth parts through it)
Volume	100%
(Due to no gain control, it's practically TOO LOUD)
Customer Service	98%
(Acoustic is no longer around, but the repair dept at YORKVILLE SOUND near Tor
onto, Canada, took great care of this head! )
Value	100%
(For me, it's perfect, even better than new bass heads)
Overall	98%
(Outperforms new/other bass heads I have tried. )