Red Rose Music Model 3a - Manual (Page 2)

Model 3a
Line Level Preamplifier
943 Madison Avenue
New York, New York 10021
212-628-5777
www.redrosemusic.com
Operational Characteristics: Class A
Gain Architecture: All vacuum tubes signal path
Power Supply Architecture:
• Detachable RFI/EMI shielded external power
supply
• 11 discreet FET regulated- All gain stages
individually regulated buffered
• EMI/RFI power line filtration using AudioPrism’s pro-
prietary Quiet-line® technology
Input Connections: Single-ended, gold plated, Teflon® in-
sulated, line-level inputs for Phono (line-level) CD, Tuner,
Video and Tape
Output Connections: Two pairs of single ended, gold plated
Teflon® insulated, outputs for the connection of multiple
amplifiers
Control Section: Five-position input selector, dual stepped
volume control using precision metal film resistors (only
two resistors in the signal path at any position) Operation
selector for on, mute and standby (designed to extend tube
life) All control switches are amperage, low-loss construc-
tion with silver-plated contacts. Source selector switches
both “hot” and ground simultaneously.
Internal Construction: All circuit boards are vibration iso-
lated, glass-epoxy, copper-traced full ground plane design
active components are hand selected and matched-internal
wiring is OFC copper-each channel is separated from input
to output for shortest signal path and maximum isolation.
Tube complement: (2) 6DJ8, (2) 12AU7 or 5814
Frequency Response : 3.5 Hz –300 kHz
±
3 dB (0 dB
attenuation)
Gain: 20 dB @ 1 kHz
Total harmonic Distortion: <.15% @ 1volt
Input impedance: 20 k
Ω
Output impedance: 220
Ω
Signal to noise: >90 dB (1volt @ 100 k
Ω
, 95 dB typical)
Stereo separation: > 90 dB from 10 Hz to 100 kHz
Channel Balance: .2 dB maximum
Maximum Input Voltage: 7 volts RMS
Maximum output Voltage: 17 volts RMS
(0 dB attenuation, 1.3 volts RMS input, 1% THD)
AC power requirements: 120 VAC (100~240V available
upon request)
Dimensions:
Preamplifier:
Height: 3.92inches (9.96 cm)
Width: 17.00 inches (48.26 cm)
Depth: 12.50 inches (44.45 cm)
Weight: 14.0 lbs. net (5.45 kg)
Power Supply:
Height: 3.0 inches (7.62 cm)
Width: 5.0 inches (12.70 cm)
Depth: 10.50 inches (4.60 cm)
Weight: 10.0 lbs. net (4.60 kg)
Design Details and Features Technical Specifications