Red Rose Music Model 3a manual Line Level Preamplifier, Design Details and Features, Dimensions

Model 3a

Line Level Preamplifier

Design Details and Features Technical Specifications

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% @ 1voltInput impedance: 20 kΩ

Output impedance: 220Ω

Signal to noise: >90 dB (1volt @ 100 kΩ, 95 dB typical)

Stereo separation: > 90 dB from 10 Hz to 100 kHz

Channel Balance: .2 dB maximumMaximum Input Voltage: 7 volts RMSMaximum 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)

943 Madison Avenue

New York, New York 10021

212-628-5777www.redrosemusic.com