POWER AMP SECTION:
Rated Power and Load:
25 W RMS into 8 Ohms
Power @ Clipping (Typically):
(5% THD, 1 kHz, 120 V AC
line)
25 W RMS into 8 Ohms
Total Harmonic Distortion:
Less than 0.5%m 100 mW to
10 W RMS, 60 Hz to 10 kHz,
8 W (typically below 0.2%)
Power Consumption:
50 W, 50/60 Hz, 120 V AC
PREAMP SECTION:
The following specs are measured
@ 2 kHz with the controls preset as
follows:
Channel Select Normal (Out)
Low and High @ 10
Mid @ 0
Pre Gain and Post Gain @ 10
Reverb @ 0
Nominal Levels are with
Nominal Gain @ 5
Minimum Levels are with
Minimum Gain @ 10
All effects “OFF”
Preamp Input (Normal
Channel):
Impedance: High Z, 1 M Ohm
Nominal Input Level: -6 dBV,
70 mV RMS
Maximum Input Level: 0 dBV,
1 V RMS
CD/TAPE INPUT:
Input Impedance: 100 k Ohms
Nominal Input Level:
.5 V RMS, -6 dBV
(Stereo jack designed for use
with stereo headphone outputs
on CD/tape players)
Headphone Output:
Load Impedance:
8 Ohms or greater
Nominal Power Output:
20 mW into 8 Ohms
(Stereo jacks, monaural
signal disconnects internal
speaker when phone plug is
inserted.)
System Hum and Noise @
Nominal Input Level:
(20 Hz to 20 kHz unweighted)
62 dB below rated power
Equalization:
Special low, mid, and high
passive type EQ
TRANSTUBE
®
258 EFX SPECIFICATIONS
This block diagram shows signal flow within the unit. In order to thoroughly understand
the unit’s functions, please study the block diagram carefully.
TRANSTUBE
®
258 EFX BLOCK DIAGRAM
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