Is Avalon equipment durable enough for the road?
A: Yes. All Avalon equipment is literally "built like a tank"
and built to last a lifetime - steel chassis, thick metal
faceplate, aluminum knobs, circuit boards are screwed to chassis
using stainless steel hardware, hand wired, and the list goes
on. Artists including the Rolling Stones, AC/DC, Keb'Mo, and
many others use Avalon gear on tour.
Can I change the voltage on my Avalon to use in different
internal power supply on the Vt-700 series equipment and the
B2t power supply for the AD2000 series has selectable voltages:
100V, 120V, 220V, and 240V. The U5 has an internal switch
to switch between 115V and 230V. It is very easy to change
the voltage on any Avalon unit.
How often will I need to change the tubes in my Vt-737sp /
tubes in your 737sp are designed to operate for a minimum
of 5,000 hours. We have seen units with tubes that have over
15,000 hours and are still operating within spec.
The way to tell if tubes are bad or failing:
Electronic Noise: All types from consistent high levels of
hiss to random splats, static sounds and popcorn noise.
2. Microphonic Noise: To test for microphonic noise, simply
tap the tube carefully with the rubber eraser at the end of
a pencil. If you hear a loud ping or lasting ringing sound,
the tube should be replaced.
Where can I find replacement bulbs, lamps and fuses?
bulbs or lamps that Avalon uses to illuminate the VU meter
are 14V 80MA mini bayonet bulb. You can find this bulb at
many electronic part stores (Radio Shack Part Number 272-1117.)
The approximate cost for these bulbs are US$1.50 for two.
The fuse that Avalon uses on all units except the U5 is a
standard 1 amp 250V slow blow fuse 1 1/4" x 1/4"
3AG or MDL Type (Radio Shack Part Number: 270-1021). The U5
uses a 1 amp 250V slow blow fuse 5mm x 22mm (Radio Shack Part
How can I have my Avalon serviced or repaired?
A: Click here
How do you use the speaker input on the back of the U5?
A: The set up is as follows:
1. Connect your instrument to the input on your instrument
2. Connect your amplifier speaker output to your speaker for
3. Connect a secondary speaker output from your amp or your
speaker cabinet to the SPEAKER INPUT on the rear of the U5.
4. Press in the SPEAKER to INPUT on the front of the U5
5. Connect the line output on the U5 to the recording device
or mixing console.
Click here to download a diagram.
Where can I purchase Avalon internationally?
A: Please fax your request to 949-492-4284.
What are the main differences between the microphone preamplifiers
in the Vt-737sp and the AD2022 (M5)?
A: The Vt-737sp is a vacuum tube preamp (uses four dual triode
tubes) and includes an opto-compressor and equalizer. The
AD2022 (dual channel) and M5 (mono), are Avalon's "top of
the line" ultra-high performance solid state microphone preamps.
The AD2022 (M5) preamp features 100% discrete electronics
and no tubes. All Avalon Design preamps run in Class A mode
and have enormous headroom and wonderful musicality. Sonically,
the Vt-737sp has a more "close-up" sound whereas the AD2022
(M5) has a larger and more extended sound stage giving a deeper
and more detailed three dimensional image (you hear more of
the room). Click here for more...