PRO-250 SPECIFICATIONS
• Input
o Impedance: 1 Meg (CH-1), 220k (CH-2) MIC 4.4k (CH-2)
o Sensitivity: 150MV to 6V
• EQ: (Active)
o Bass: +/- 12db @ 150HZ (CH-1, CH-2)
o Mid: +/- 12db @ 1kHZ (CH-2)
o Treble: +/- 12db @ 5kHZ (CH-1, CH-2)
• Shape (CH-1)
o +5db @ 3kHZ
o -5db @ 1500HZ
o +5db @ 100HZ
• Notch (Feedback Elimination) (CH-1)
o Range: 100 to 350HZ
o Attenuation: –18db
• DIRECT OUTPUTS
o XLR balanced output level: -30 dBV nominal
o XLR balanced output impedance: 150 ohms
o ¼” unbalanced output level: +4 dBv nominal
o ¼” unbalanced output impedance: 1 kohm
• Output
o Power: (250W RMS)
o Total Harmonic Distortion: .1%
o Signal to Noise Ratio: 98db
PRO-250 dimensions:
Weight: 39 Lbs.
Height: 16”
Length: 21.5”
Depth: 10.5”
Speaker compliment
1 x 10” Eminence special design
1 x 4” Ultrasound Special design
1 - Eminence “Supertweeter”
DIGITAL EFFECTS
Processor type: Alesis DSP engine x 2.
(Separate processor for each channel)
Internal processing: 24 bit
A/D converter: 24 bit – 64X oversampling
D/A converter: 24 bit – 128X oversampling
Dynamic Range: 80 dB
THD + N (1 kHz): <0.01%
Sampling rate: 48 kHz
DIGITAL EFX PROGRAM LIST
1. Chorus: Stereo chorus.
2. Flange: Stereo flanger for jet wash effects.
3. Plate 2: Sizzling bright plate reverb.
4. Plate 3: Short vintage plate reverb.
5. Room 3: Warm room reverb.
6. Plate 1: Classic plate reverb.
7. Bypass: No Effect
8. Rotary Speaker: Rotary speaker emulation.
9. Chorus/Room 1: Chorus with reverb.
10. Chorus/Room 2: Auto-wah guitar effect with
reverb.
11. Delay 1: 125ms slapback delay.
12. Delay 2: 190ms delay for percussive arpeggios
13. Hall 1: Bright hall reverb.
14. Hall 2: Warm hall reverb.
15. Room 1: Hardwood studio reverb.
16. Room 2: Ambience for acoustic mixes and synth
sounds.
WARNING: When using electric products, basic cautions should
always be followed, including the following:
1. Read all safety and operating instructions before using this product.
2. All safety and operating instructions should be retained for future
reference.
3. Obey all cautions in the operating instructions and on the back of
the unit.
4. All operating instructions should be followed.
5. This product should not be used near water, i.e., a bathtub, sink,
swimming pool, wet basement, etc.
6. This product should be located so that its position does not interfere
with its proper ventilation. It should not be placed flat against a wall or
placed in a built-in enclosure that will impede the flow of cooling air.
7. This product should not be placed near a source of heat such as a
stove, radiator, or another heat producing amplifier.
8. Connect only to a power supply of the type marked on the unit
adjacent to the power supply cord.
9. Never break off the ground pin on the power supply cord.
10. Power supply cords should always be handled carefully. Never
walk or place equipment on power supply cords. Periodically check
cords for cuts or signs of stress, especially at the plug and the point
where the cord exits the unit.
11. The power supply cord should be unplugged when the unit is to be
unused for long periods of time.
12. If this product is to be mounted in an equipment rack, rear support
should be provided.
13 Metal parts can be cleaned with a damp rag. The vinyl covering
used on some units can be cleaned with a damp rag or an
ammoniabased household cleaner if necessary. Disconnect unit from
power supply before cleaning.
14. Care should be taken so that objects do not fall and liquids are not
spilled into the unit through the ventilation holes or any other openings.
15. This unit should be checked by a qualified service technician if:
a. The power supply cord or plug has been damaged.
b. Anything has fallen or been spilled into the unit.
c. The unit does not operate correctly.
d. The unit has been dropped or the enclosure damaged.
16. The user should not attempt to service this equipment. All service
work should be done by a qualified service technician.
17. Exposure to extremely high noise levels may cause a permanent
hearing loss. Individuals vary considerably in susceptibility to noise
induced hearing loss, but nearly everyone will lose some hearing if
exposed to sufficiently intense noise for a sufficient time. The U.S.
Government’s Occupational Safety and Health Administration (OSHA)
has specified the following permissible noise levelexposures.
Duration Per Day In Hours Sound
Level dBA, Slow Response
8 90
6 92
4 95
3 97
2 100
I l/2 102
1 105
l/2 110
l/4 or less 115
According to OSHA, any exposure in excess of the above permissible
limits could result in some hearing loss.
Ear plugs or protectors in the ear canals or over the ears must be worn
when operating this amplification system in order to prevent a
permanent hearing loss if exposure is in excess of the limits as set
forth above. To ensure against potentially dangerous exposure to high
sound pressure levels, it is recommended that all persons exposed to
equipment capable of producing high sound pressure levels such as
this amplification system be protected by hearing protectors while this
unit is in operation.
SAVE THESE INSTRUCTIONS!
